OIL RESISTANCE ENERGIZED BY - Lanxess · Page 1 of 32: This document contains important information...
Transcript of OIL RESISTANCE ENERGIZED BY - Lanxess · Page 1 of 32: This document contains important information...
Page 1 of 32: This document contains important information and must be read in its entirety. 1
OIL RESISTANCE ENERGIZED BY
High performance elastomer NBR from LANXESS. Highest quality standards such as excellent resistance to swelling in oils, lubriants, fuels, greases. www.hpe.lanxess.com
Edition 2013-01
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PROBLEMSEALS AND GASKETS MADE OF RUBBER WITH DUBIOUS ORIGIN
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NO PROBLEMSEALS AND GASKETS MADE OF LANXESS NBR
Articles made of oil-resistant rubber are absolutely indispensable in mechanical, automotive and motor engineering, ensuring functional efficiency, durabi-lity and effective environmental protection. Krynac®, Perbunan® and Baymod® N – your assurance that there are no problems.
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CONTENT
05 Introduction
n Perbunan® and Krynac® as base polymers for rubber parts
06 General properties
08 General purpose grades: Supplied in bale form
10 Distinguishing features of Perbunan® and Krynac®
10 Clean grades for highly efficient injection molding
11 Applications for Krynac® XL
12 Features of Krynac® X
n Favorable properties of Perbunan® and Krynac®
in rubber articles
14 Resistance to thermal oxidative aging
15 Low-temperature properties
15 Sealing force retention
16 Gaskets
17 Swelling and chemical resistance to media
18 Resistance to abrasion and wear
18 Resistance to gas permeation
19 Ozone and weather resistance
20 Applications in electrical technical articles
20 Physiological properties
n Baymod® N as polymeric additive for plastics
22 Grades for plastic modification
23 Abraison-, oil- and fuel-resistance
n Baymod® N as a polymeric component in friction parts
24 Grade for friction parts
25 Comparison of the coefficient of friction
n Examples for the use of LANXESS NBR
n Product ranges
27 Krynac®
28 Perbunan®
29 Baymod® N
29 Nanoprene®
n Contact data
30 Technical and commercial
n Quality and safety
31 Quality & Environmental management
31 Safety information
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.
Krynac® Xcarboxylated
NBR
Perbunan®
fast curinglow mold fouling
Baymod® NNBR
ground powder
Krynac®
medium fastcuring
Krynac® XLpre-crosslinked
NBR
Baymod® N XLXL-NBR
ground powder
Baymod® N XLXL-NBR
spray-dried
NBR
XL-NBR
XNBR
NBR
LANXESS Emulsion Rubber S.A.S.
Bales for the rubber industry
Ground powder for the plastics
and rubber industry
Spray-driedpowder for
resinmodification
Introduction
Krynac®, Perbunan® and Baymod® N represent a comprehensive range of
solid acrylonitrile-butadiene copolymers manufactured by up-to-date emul-
sion polymerization techniques.
Based on a patent filed in 1930, this class of polymers has developed dynam-
ically and now has a broad spectrum of applications. In fact, NBR polymers
are essential for many industrial applications.
LANXESS offers the following main product lines:
For the rubber industry
Krynac® and Perbunan® are NBR and XNBR (ISO 1629) specialty elasto-
mers for oil-resistant technical rubber articles with an excellent cost/perfor-
mance ratio. NBR elastomers are indispensable in the automotive industry, in
mechanical engineering installations and in other sectors, particularly the
building and consumer goods industries.
For composite gaskets
Baymod® N ground materials are used for high-quality gaskets. Baymod® N
powdered polymers give high-quality rubber compounds through continuous
mixing using extruders.
For the thermoplastics processing industry
The Baymod® N range comprises powdered materials for the modification of
thermoplastics especially PVC.
For the manufacture of friction parts
LANXESS offers spray-dried Baymod® N special grades as a polymer compo-
nent in brake and clutch friction parts.
Acrylonitrile butadiene copolymers are also contained in some solvent-
based adhesives. The Krynac®, Perbunan® and Baymod® N grades are
manufactured at LANXESS Emulsion Polymers S.A.S. in La Wantzenau,
France. LANXESS Emulsion Polymers is committed to LANXESS’s general
“Quality and Environmental Policy” (LANXESS AG, Quality and Environ-
mental Policy, Issue Sept. 2007) claiming that “environmental protection,
health, safety and quality are accorded the same priority as commercial
efficiency”. The company is certified to DIN EN ISO 9001 : 2000 and
EN ISO 14001: 2004.
State-of-the-art emulsion polymerization includes the use of biologically
degradable chemicals (especially emulsifiers), the avoidance of chemi-
cals that could generate toxic, volatile N-nitrosoamines, and reducing to a
minimum the formation of residual monomers like free acrylonitrile and
butadiene and miscellaneous volatile organic compounds (“VOCs”).
Most of the grades meet the requirements of the relevant specifications for
food-grade rubber articles intended for repeated use according to FDA CFR
§ 176 000, including § 180.22, and the provisions of BfR, Recommen-
dation XXI, including the acrylonitrile migration limits referred to therein.
Nevertheless, users must contact their technical/commercial partner at
LANXESS to obtain written confirmation that the product is suitable for the
intended application.
Krynac®, Perbunan® and Baymod® N polymers do not decompose under
normal processing conditions. In the absence of oxygen no significant
decomposition occurs up to 600 °C. In the event of fire, carbon dioxide,
water and nitrogene oxides are mostly formed, provided there is sufficient
oxygen present.
Our NBR product range and the data sheets can be found at:
www.hpe.lanxess.com
KRYNAC®
PERBUNAN® BAYMOD® N
NBR at a glance
Excellent resistance to swelling in oils /lubricants / fuels / greasesVolume swell (ASTM oil #3) <10% (110°C, 14d, 34% ACN)
Very good heat resistance Service temperature < 110-120°C (criterium 1000h)
Good low temperature flexibilityGlass transition temp: -50 to -5 °C
High level of mechanical properties Tensile strength up to 35 MPa
Hardness 25 to 95 Shore A
Low permanent setcompression set < 10% (70h / 100 °C)
Good abrasion and wear resistance Low gas permeability
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1. General properties
Rubber articles based on Krynac® or Perbunan® are essentially characterized
by very good resistance to swelling in contact with mineral-oil-based fluids and
heat resistance up to 120 °C.
Typical rubber parts meet the requirements for the cateogories B (or C) and
cateogories H to F according to ASTM-D 2000.
In addition to outstanding resistance to most of the fluids used in industrial
installations, Krynac®/Perbunan® also exhibit favorable properties with regard
to abrasion and wear resistance, gas permeability and sealing force retention.
The spectrum of properties compared with EPDM, SBR, CR, CSM and ECO is
shown in Figs. 2 and 3.
Heavy-duty excavators: robust, safe and environmentally friendly hydraulics
with rubber parts based on LANXESS NBR polymers
The primary selection criteria for NBR are the acrylonitrile content (from
18 % to 50 %) and the Mooney viscosity (from 30 MU to 120 MU), both of
wich are important for the processing of the compounds and for the proper-
ties of the vulcanizates made from them.
Fig. 2: The spectrum of selected properties of NBR
compared with EPDM and SBR
Low-temperatureproperties
Heatresistance
Gaspermeability
Sealing forceretention
Oil resistance
NBR EPDM SBR
Resistance to abrasion and wear
Fuelresistance
Fig. 3: The spectrum of selected properties of NBR
compared with CR, CSM and ECO
ECOCR
Heatresistance
Gaspermeability
Sealing forceretention
Oil resistance
NBR CSM
Resistance to abrasion and wear Low-temperature
properties
Fuelresistance
KRYNAC® AND PERBUNAN®
AS BASE POLYMERS FOR RUBBER PARTS
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The influence of the polymer Mooney viscosity on some processing proper-
ties is demonstrated below in Fig. 4.
The compound viscosity depends primarily on the polymer viscosity and is
also influenced by other compounding ingredients. The processing proper-
ties, and to some extent the vulcanizate properties, are influenced by the
viscosity of the compound, as shown in Fig. 5.
Most importantly, the acrylonitrile content determines the swelling
properties in non-polar media and the flexibility of the rubber parts at low
temperatures (Fig. 6).
The acrylonitrile content further impacts the diffusion of gases as the
impermeability is improved for vulcanizates with a high acrylonitrile
content.
Krynac® and Perbunan® are suitable for biodegradable hydraulic fluids.
The stress-strain properties, the permanent set properties, the wear
and abrasion resistance, and the resistance to thermo-oxidative aging
is optimized by appropriate compounding such as the choice of fillers,
plasticizers, crosslinking systems, antioxidants and other special additives.
Due to its structure, vulcanizates based on NBR generally have limited
resistance to ozone attack. Ozone-resistant articles are, in general, based
on fluxed NBR/PVC blends.
Fig. 4: The influence of the polymer viscosity on some polymer
properties and on processing and mixing
tackiness
low high
cold flow
green strength
mill processing
filler uptake
energy uptake
Fig. 5: The influence of the compound viscosity on some
properties
green strength
low high
mill processing / calendering
extrusion rate, surface and die swell
injection molding
vulcanizate properties
Fig. 6: The influence of the acrylonitrile content on
important properties
oil resistance
low high
low temperature properties
Polymer Acrylonitrile
content (%)
ML 1+4/100
°C (MU)
Krynac® XL 3470 34 70
Krynac® XL 3355 VP* 33 55
Krynac® XL 3025 29.5 70
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Perbunan® is the product of choice for injection molding (photo: DESMA Elastomertechnik GmbH)
KRYNAC® AND PERBUNAN®
AS BASE POLYMERS FOR RUBBER PARTS
2. General purpose grades:
Supplied in bale form
Krynac® : medium-fast curing grades
Perbunan®: fast curing grades ; in addition; high
modulus of the vulcanizates.
Special purpose grades (Perbunan® and Krynac® )
Supplied in bale form
Perbunan® CHM -.grades (“clean high modulus”)
Perbunan® offering very good low temperature flexibility
Perbunan® grades of very high molecular weight
Perbunan® grades of very good resitance in mineral oils.
Krynac® grades with slow cure for excellent processing
safety
Krynac® - plasticizer extended grade
Krynac® grades with extremely good oil resistance
Krynac® grades of very high molecular weight
Krynac® pre-crosslinked grades
Krynac® X - carboxylated nitrile rubber
Baymod® N
Supplied in free-flowing powder form
Baymod® N - non-precrosslinked grades
Baymod® N XL – pre-crosslinked grades
The terms “fast cure”, “medium-fast cure” and “slow cure” refer to the cross-
linking activity in sulphur cured compounds, in which case they differ signifi-
cantly. The difference in “eV-cured” compounds is smaller. There si almost
no difference in peroxide cured compounds.
All Perbunan grades are fast curing polymers not showing big differences
between the various grades.
Within Krynac®, both medium-fast curing and slow curing cannot be doubt-
lessly identified by its character. Reference is made to the table in page 9,
in which “medium-fast” and “slow curing” grades are specifically addressed.
.
Pre-crosslinked grades contain gel. In contrast to all aother Perbunan® and
Krynac® grades they are not soluble in MEK.
The present range includes :
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Fig. 7: Krynac® and Perbunan® grades according to their curing activity
Acrylonitrile
content (%)
slow cure medium fast cure fast cure fast cure “CHM”
< 25 Perbunan® 2255 F Perbunan® 1846 F
26 - 28 Krynac® 2860 F Krynac® 2640 F Perbunan® 2845 F Perbunan® 2831 F
Krynac® 2950 F Krynac® 2840 F Perbunan® 2870 F Perbunan® 2846 F
Krynac® 2850 F Perbunan® 2895 F
Krynac® 2865 F Perbunan® 28120 F
33 - 34 Krynac® 3360 F Krynac® 3330 F Perbunan® 3430 F Perbunan® 3431 F
Krynac® 3345 F Perbunan® 3445 F Perbunan® 3446 F
Krynac® 3370 F Perbunan® 3470 F Perbunan® 3481 F
Krynac® 3380 F
Krynac® 33110 F
35 - 36
39 - 41 Krynac® 4045 Krynac® 3950 F Perbunan® 3945 F Perbunan® 3976 F
Krynac® 3980 VP Perbunan® 3965 F
44 - 46 Krynac® 4450 F Perbunan® 4456 F
> 48 Krynac® 4955 VP Krynac® 4975 F
Raw material of Krynac® and Perbunan® looks the same. (Picture shows the
labeling of a unwrapped 25 kg bale of a Perbunan® grade.)
Delivery of Krynac® and Perbunan® : wrapped in light protective film.
eV crosslinking systemRhenocure® IS60/G750.4 phrVulkacit®NZ1.5 phrVulkacit®Thiuram2Vulkalent® 1
Krynac® 3445F
0 200 500
Time (sec)
Perbunan® 3445F
100
Tor
qu
e (d
Nm
)
30
25
20
15
10
5
0300 400
E
Fig. 8: Comparison of Krynac® and Perbunan®
compounds with eV crosslinking system
Fig. 9: Slow curing Krynac® Grade compared with an equivalent
Krynac® Grade with medium-fast Cure
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3. Distinguishing features of Krynac® and Perbunan®
Differences in the polymerization recipe for Krynac® and Perbunan® result in
two non-corresponding ranges of products.
Krynac® and Perbunan® respond differently to typical curing agents for sulfur
and eV curing such as sulfur, sulfur donors and accelerators. Compared with
Krynac®, Perbunan® exhibits more rapid curing and a higher torque in the
rheometer curve. These differences are shown in Fig. 8
Consequently, Krynac® gives better processing reliability and longer shelf
life of the finished compounds, while Perbunan® grades enable short curing
cycles and provide a high level of physical properties.
4. Clean grades for highly efficient injection molding
Krynac® and Perbunan® are both highly suitable for molded articles due to
good scorch/cure relationship and high level of vulcanizate properties. The
compound viscosity can be adjusted easily by selecting polymers of a suitable
base viscosity from the extensive range of grades.
Addtionally, customers can take advantage of a special range of grades known
as Perbunan® CHM (CHM = Clean High Modulus) grades. These grades are
available in the range of Ml 1+4/100 °C = 30 – 80 MU and acrylonitrile
content = 18 – 45 %.
The key characteristics of the Perbunan® CHM polymers are, for example:
Almost no foreign matter resulting from the emulsion polymeriza-
tion process
Secondary components in the polymer do not cause substantial exudation
and mold fouling effects. Compounders are now able to add limited amounts
of processing agents to optimize the flow properties during molding, while
preserving the very good mold fouling resistance using their own experience
and in-house know-how.
Various static seals in a hydraulic
cylinder (pict.: Trelleborg)
KRYNAC® AND PERBUNAN®
AS BASE POLYMERS FOR RUBBER PARTS
Time min
MDR-Rheometer at 170°C
Polymers: Cross-linking system
(1) Krynac® 3950 F Sulphur 1,5 phr(2) Krynac® 4045 F Vulkacit® NZ 1,5 phr
0
5
10
15
0 1 2 3 4 5Time min
Torque dNm
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MDR Rheometer at 130 °CCompound:hydraulic hose gradeH~75 Shore A
Perbunan® 2845F
0 1000 3500
Time (sec)
Perbunan® 2846F
500
S’ (
dN
m)
35
30
25
20
15
10
5
01500 2000 2500 3000
Krynac® 2750F
M100 (MPa): 2846F: 7.42845F: 7.02750F: 6.6
Always full speed ahead with Krynac® and Perbunan®: marine propeller
seals
Fig. 10: Curing behavior of a typical Perbunan® CHM grade com-
pared with Krynac® and Perbunan® standard grades
Optimum crosslinking density
Due to their special manufacturing technology Perbunan® CHM grades
act as “modulus boosters” in vulcanizates. Their sealing force retention
properties are also excellent.
Very good relationship between low-temperature flexibility and
swelling properties in oil
Perbunan® 1846 F and Perbunan® 2846 F are base polymers for seals
used at extremely low temperatures (down to -40 °C) and high tempera-
tures (up to 120 °C).
Corrosion
As a clean polymer Perbunan® CHM has no measurable corrosion activity. It
contains only traces of inorganic chlorine, making it ideal for corrosion-proof
seals.
Easy post-treatment of finished articles, if required
Some seals have to be treated after finishing in order to improve the smooth-
ness of the surface, which is sometimes affected by foreign constituents in
the polymer. Generally speaking, these have no impact if Perbunan® CHM
grades are selected.
Low migration
For example, the migration requirements specified in many regulations
for food-grade articles intended for repeated use are more easily met with
Perbunan® CHM polymers.
5. Applications for Krynac® XL
Pre-crosslinked polymers (Krynac® XL) significantly improve the extrusion
behavior of NBR compounds with respect to several properties, such as:
extrusion speed (commercial aspect)
surface smoothness of the extrudates (quality issue)
die swell and good collapse resistance (better dimensional control)
Krynac® XL grades are preferably used in blends with non-pre-crosslinked
Krynac® or Perbunan® grades. Compared directly with general NBR polymers
some stress-strain properties such as tensile strength and elongation at break
are lower.
Krynac® XL is effective in boosting the modulus. Compounders should take
advantage of this in order to design high modulus compounds.
NBR
Heatresistance
Stress-strainproperties
Processing
Low-temperaturestiffness
Wear and abrasionresistance
Extrusionresistance
Polymer rheology
Krynac® X
Zinc oxide particles
Carboxyl groups
Nitrile groups
Polymer chain
Fig. 11: Properties of Krynac® X compared
with NBR
Fig. 12: Cluster model of the structure of zinc-oxide-crosslinked
XNBR (in addition to common sulphur and peroxide crosslinking)
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6. Features of Krynac® X
Krynac® X opens up new opportunities for NBR compounding. During emul-
sion polymerization a third monomer, an unsaturated carboxylic acid, is intro-
duced in order to provide a number of specifically improved properties, e.g.:
wear and abrasion resistance
sealing force retention especially to achieve very good extrusion resistance
high-modulus stress-strain characteristics at reasonably low hardness.
However, attention must be paid to the more difficult rheological properties,
and hence processing, as well as to the lower level of heat resistance of the
vulcanizates compared with standard NBR. The carboxylic acid monomer
also impairs the low-temperature flexibility of the vulcanizates.
The properties of Krynac® X compared with NBR are summarized in Fig. 11.
In addition to this general spectrum of properties Krynac® X vulcanizates differ
from NBR by exhibiting:
hydrophilic surfaces – vulcanizates are wetting protic fluids
direct bonding to several polyamide semi-crystalline thermoplastic poly-
mers (It is worth noting that in this case compounds requiring peroxide cross-
linking without the addition of metal oxides are preferred.)
Metal oxides are effective as additional crosslinking agents for Krynac® X.
In general, compounds based on this polymer have to include metal oxides
(almost exclusively various zinc oxides) as a component (see Fig. 12).
Due to this effect, care must be taken, when handling the compounds to:
add the zinc oxides to the compounds together with the common
accelerators
control the storage of the finished compound as zinc-oxides are already
effective as crosslinking agents at room temperature.
Cable-controlled gearshift manufacture
using direct 2-component technique
(photo: Schneegans)
KRYNAC® AND PERBUNAN®
AS BASE POLYMERS FOR RUBBER PARTS
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Industrial cotton processing: ring spinning machines producing thread...
Conveyor belts used for mail sorting: Krynac® X helps to reliably distribute
70 million letters to 40 million destinations every day
...with rubber parts based on Krynac® and Perbunan®
Fig. 14: The Gordon-Taylor relationship for Krynac® and
Perbunan® raw polymers
Fig. 13: Arrhenius graph for typical Krynac® and Perbunan®
vulcanizates
(°C)
composition with optimum hot air resistance
standard composition
log
t (
d)
for
EB
=E
B °
/2
3.0
2.5
2.0
1.5
1.0
0.5
02 2.2 2.4 2.6 2.8
1/T (10-3 °K-1)
3.0 3.2
227 181 144 112 84 60 39
~120 °C ~108 °C
42d=1000h
Test method: Differential scanning calorimetry (DSC)
VDA...
Tg
(°C
)
0
-10
-20
-30
-40
-50
-6025 30 35 40
Acrylonitrile content (%)
45 50
y=1.4818x - 76.108R2=0.9948
10 15 20
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7.1 Resistance to thermal oxidative aging
Increasing hardness and modulus and reduced elongation at break are
typically observed when vulcanizates based on Krynac® and Perbunan® are
exposed to hot air at elevated temperatures.
The resistance to thermal oxidative aging can be controlled by appropriate
compounding ingredients such as:
Antioxidants
The synergetic combination of:
Vulkanox® HS: 1.5 phr
Vulkanox® MB2: 1.5 phr
is generally recommended. Another possible system is based on derivatives
of diphenylamine and Vulkanox® ZMB2 (not recommended for Krynac® X).
If the relevant food-grade regulations have to be respected, bisphenolic
antioxidants (Vulkanox® BKF or Vulkanox® SKF) have to be used.
The choice of filler system
Fillers based on active silica (e.g. Vulkasil® S or Vulkasil® N) are necessary for
optimal resistance to thermal oxidative aging. Mercapto silanes for eV-cross-
linked systems or vinyl silanes for peroxide crosslinked vulcanizates (using an
appropriate mixing technique) are helpful to achieve the desired stress strain
properties. Fillers that are already modified with silanes are, in principle, able
to achieve similar effects.
Further requirements
It should be noted that an eV curing system is recommended. Peroxide cross-
linking systems that (are popularly known to) result in heat-resistant crosslinks
do not achieve a superior level of heat resistance.
Heat-resistant vulcanizates should not contain more than the necessary quan-
tities of plasticizers. Vulkanol® OT shows further slightly favorable effects.
Assuming these recommendations are followed, vulcanizates of Krynac®
and Perbunan® are capable of resisting temperatures of up to 120 °C/
1000 h, as shown in the Arrhenius formulation (Fig.13).
Leakage-free seals at very low and high temperatures
in shock absorbers
FAVORABLE PROPERTIES OF KRYNAC® AND PERBUNAN®
IN RUBBER ARTICLES
Page 15 of 32: This document contains important information and must be read in its entirety. 15
Fig. 15: Low-temperature properties of vulcanizates based on Krynac® and Perbunan®
Base polymer: Perbunan® 1846F (18 % acrylonitrile content)
Method Specification Physical property Standard compound,
70 Shore A
Compound with best low temperature
flexibility, 70 Shore A
Differential scanning
calorimetry (compound)
VDA Glass transition
temperature (°C)
-50
Torsional pendulum test DIN Temperature at
maximum
damping (°C)
-36 -45
Tension retraction test
(TR)
ASTM TR-10 -47 -53
TR-30 -43 -48
TR-50 -40 -43
TR-70 -36 -38
Compression set
at 20 °C (24h/-20 °C)
DIN 53517 CS (%) 17 20
Brittleness point BP (°C) -60 -64
Low-temperature
bending at -50 °C
o.k. o.k.
7.2 Low-temperature properties
Krynac® and Perbunan® grades are amorphous polymers. The ratio of acry-
lonitrile and butadiene determines the glass transition process producing a
strong linear relationship between the glass transition temperature and the
acrylonitrile content (Gordon-Taylor relationship; Fig. 14).
A similar graph (but shifted to higher temperatures) can be obtained for
the characteristics of test methods on vulcanizates such as the TR test (e.g.
TR10), the Gehman Test (e.g. T-10) and dynamic mechanical test methods
to evaluate the visco-elastic properties (for example the maximum of the loss
modulus or the tan δ and the maximum of damping measured by torsional
pendulum tests).
The glass transition process can be successfully shifted to even lower tempera-
tures by means of plasticizers. This effect depends on the type and amount of
plasticizers used in the compound.
Brittle tests and usually low-temperature bending tests are used to determine
the mechanical properties at the test temperature. As these properties are also
significantly dependent on compounding ingredients like fillers and crosslink-
ing systems, they cannot be represented by a simple Gordon-Taylor relation-
ship.
Perbunan® 1846 F is recommended to meet most stringent low-temperature
requirements. A typical set of properties is shown in Fig. 15.
7.3 Sealing force retention
The majority of industrial and automotive oil seals are NBR-based. In addition,
tight sealing properties are also indispensable for different technical rubber
articles such as hoses and tubes.
Basic information about the sealing forces of vulcanizates relates to com-
pression set measurements. Depending on the test temperature, a typically
“trough-shaped” curve is found, as shown in Fig. 16 (see following page).
These curves show three characteristic areas:
The low-temperature branch: depends entirely on the acrylonitrile content,
is best for Perbunan® 1846 F
The average-temperature branch is that in which no aging effects are to be
considered. This level can be controlled by other compounding ingredients,
for example, or by the crosslinking system. For superior results, straight sulfur
curing should be used. eV curing and peroxide curing give slightly inferior
levels.
The high-temperature branch reflects the effects of aging, thus showing best
results for peroxide curing, followed by eV curing and sulfur curing.
Method: continuous compressive stress relaxation, test equipment: Elastocon AB
F: force depending on the test time; F=F(t); F0: starting force
Compound: O-ring type, 70 Shore A, eV cure. Base polymer: Perbunan® 3430F
F/F
0
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
-3.00
Log time of exposure
-2.00 -1.00 0.00 1.00 2.00 3.00
1/e relaxation time (�)
34 % 39 %
acrylonitrile content
Com
pre
ssio
n S
et (
DIN
53
51
7)
(%)
100
90
80
70
60
50
40
30
20
10
00 20 40 60
Temperature (°C)
80 100-60 -40 -20 120 140
18 % 28 %
Fig. 16: Typical plot of the compression set properties of
eV-cured Krynac® and Perbunan® vulcanizates of varying
acrylonitrile content
Fig. 17: Continuous compressive stress relaxation plot for
Perbunan® vulcanizates, test temperature 110 °C
Page 16 of 32: This document contains important information and must be read in its entirety.16
Seals are effective as long as they are capable of preventing leakages. There-
fore, to a large extent, the decline in sealing force determines their service life.
Continuous Stress Relaxation (CSR) which is specified in ISO 2294 (1998)
is the most effective method of determining the change in the sealing power
under stress.
During CSR measurements, the retention force is recorded along with the
time of exposure. Under aging conditions, there is usually a decrease as a
consequence of aging effects. The relaxation time τ, which is identical to
the time when the relaxation index F/Fo reaches 1/e, is characteristic for
the vulcanizates involved (Fig. 17).
At a test temperature of 110 °C, relaxation times of almost 1000 h are
typically found for Krynac®- and Perbunan®-based vulcanizates with good
heat resistance.
7.4 Gaskets
Powdered polymers such as the Baymod® N grades are needed as
elastic binding agents for various fibers in gaskets. In plant constructions
such gaskets in flange joints must be reliable and durable. They have to
prevent leakages under high pressure conditions and in potentially
aggressive chemical environments. They must also be able to withstand
temperatures up to 300 °C.
Various regulations have been drawn up to protect our environment from
undesired contamination. The German “TA LUFT” (Technical Instructions on
Air Quality Control), published by the Federal German Ministry for the Envi-
ronment on July 30, 2002, is one example. Baymod® N plays an important
role in this complex, multi-component systems.
These kinds of gaskets should preferably manufactured using the free-flowing
powdered polymers Baymod® N 34.52 and Baymod® N 34.82, which allow
easy and exact dosage. The polymer powder particles of approx 0.4 – 0.7
mm diameter are gel-free, otherwise complete solution in solvents like tolu-
ene or ethanol (or blends thereof) would not be possible.
After dissolving the polymer, various fillers, fibers, additives and the curing
agents are added. This compound is applied to the hot mill of a calender
where a thin layer is formed. In this process step the solvent is removed and
the curing is initiated. Subsequently the gasket is built up layer by layer until
the final thickness is reached. After calendering, the sheets are cured further
in an oven. Finally the gaskets are punched out of the gasket sheet.
Flange gaskets based on Baymod® N meet the requirements...
FAVORABLE PROPERTIES OF KRYNAC®, PERBUNAN® ANDBAYMOD® N IN RUBBER ARTICLES
Page 17 of 32: This document contains important information and must be read in its entirety. 17
aromatic hydrocarbons
alkanes
200
150
100
50
012
solubility parameter (MPa)1/2
16 20 24 28 32 36
methyl ethyl ketone
ethyl acetate
toluene
diethylether ethanol methanol glycerol
acids
water
alcohols
halo hydrocarbons phenols
ethers polyhydric alcohols
esters
isooctane
� w
eig
ht
Data are typical for medium acrylonitrile polymers
aromatic hydrocarbons
alkanes
� w
eig
ht
50
40
30
20
10
012
solubility parameter (MPa)1/2
16 20 24 28 32 36
IRM 903
acids
alcohols
halo hydrocarbons phenols
ethers polyhydric alcohols
esters
ASTM C
standard fuel acc. to ASTM D 471-79
standard oil IRM
brake fluid
ASTM B
ASTM A
IRM 902IRM 901
Fig. 19: Swelling of Krynac® and Perbunan® vulcanizates in
standard fluids
Fig. 18: Swelling of Krynac® and Perbunan® vulcanizates in
organic liquids
7.5 Swelling and chemical resistance to media
When selecting a suitable base polymer for a pre-defind rubber-based
system, there are a large number of industrial organic and inorganic fluids
that have to be taken into account.
Attempts are made below to define pro and con principles for Krynac®/
Perbunan® vulcanizates. The reader is advised to consult further literature or
to contact the LANXESS Technical Service Representatives for details.
For organic fluids the solubility parameters (δ [(MPa)1/2) can be taken as a
guide which, according to Hildebrand, are connected with the heat of vapor-
ization (See for example: Solubility Parameters: Theory and Application in The
Book and Paper Group ANNUAL, Volume 3, 1981 (John Burke) (http://aic.
stanford.edu/sg/bpg/annual/v03/bp03-04.html.) The solubility parameters
range from ~10 MPa1/2 to ~40 MPa1/2.
Fig. 18 gives a general survey showing that NBR-vulcanizates are poorly
compatible with non-polar solvents (alkanes) and with highly polar liquids
(e.g. some alcohols and multivalent alcohols). However, caution is also
appropriate with regards to ketones, ethers, organic acids, organic acid
esters, aromatic hydrocarbons and halo-hydrocarbons, for example. Conse-
quently, standard fluids according to ASTM D 5964-07 like IRM 901, IRM
902 and IRM 903 as well as reference fuels according to ASTM D 471 like
ASTM fuel A, ASTM fuel B and ASTM fuel C are widely used when choosing
a suitable material (Fig. 19).
It should also be noted that:
Swelling depends strongly on the acrylonitrile content. High levels of acrylo-
nitrile lead to smaller changes in volume and weight.
Swelling does not take into account possible chemical reactions caused by
the fluid, by decomposition products of the fluids, or by components in the fluid
reacting with the NBR polymer.
Swelling is a process depending on time and temperature.
If the compound comprises constituents that are potentially extractable, thus
migrating into the fluid (e.g. plasticizers), swelling will be significantly influenced.
Resistance to water and aqueous media
Provided the composition of the compound is correct, vulcanizates based
on Krynac® and Perbunan® are fairly resistant in aqueous media. The level
of swelling does not significantly depend on the acrylonitrile content. In
addition, good resistance is mostly found in diluted inorganic bases, like
caustic soda solution, for example. The resistance in diluted inorganic acids
is inferior, and generally limited to ambient temperature conditions.
Oxidizing acids often cause irreversible changes in the vulcanizates.
...of the German Technical Instructions on Air Quality Control
nitrogen nitrogen
Coe
ffic
ien
t of
per
mea
tion
(1
01
7 K
D [
m/s
Pa]
) 300
250
200
150
100
50
0
NBR 18* NBR 28* NBR 34* NBR 39* CSM CR SBR NR VMQAUIIR
>3000
air air * ACN content (%)
Fig. 20a: Diffusion of nitrogen and air
Comparison of Krynac® and Perbunan® with various other elastomers at 60 °C
Page 18 of 32: This document contains important information and must be read in its entirety.18
7.6 Various other properties
7.6.1 Resistance to abrasion and wear
Reinforced vulcanizates based on Krynac®/Perbunan® have fairly good
resistance to abrasion and wear. In fact, Krynac®/Perbunan® is the first
choice if oil resistance is also required.
Compared with other polymers, the order is as follows:
BR < NBR < NR, SBR
Within the range of NBR polymers, Krynac® X has the best wear and
abrasion properties (see section 6)
7.6.2 Resistance to gas permeation
Vulcanizates based on Krynac® and Perbunan® are recommended base
materials for barrier membranes against a variety of gases like air, nitrogen,
hydrocarbons, refrigerants and carbon dioxide.
The permanent dipole moment of the CN-group prevents (non-polar) gases
from diffusing freely through the elastomer matrix. Base polymers with a high
acrylonitrile content are preferably used. High acrylonitrile polymers enable
a similar level of tightness to that of IIR. The permeation coefficient of various
other elastomers is significantly higher, of course (see Figs. 20a and 20b).
Brake shims: quieter and more comfortable ... ....with Perbunan®
FAVORABLE PROPERTIES OF KRYNAC® AND PERBUNAN®
IN RUBBER ARTICLES
Page 19 of 32: This document contains important information and must be read in its entirety. 19
* ACN content (%)
Coe
ffic
ien
t of
per
mea
tion
(1
01
7 K
D [
m/s
Pa]
) 2000
1800
1600
1400
1200
1000
800
600
400
200
0NBR 18* NBR 28* NBR 34* NBR 39* CSM CR SBR NR VQMAUIIR
>9000
Fig. 20b: Diffusion of carbon dioxide
Comparison of Krynac® and Perbunan® with various other elastomers at 60 °C
Compounding advice:
The following principles concerning compounding are recommended to
minimize permeation further.
Set the filler content to the maximum level permitted by the specification.
Possibly use special fillers like mica, graphite or diatomaceous earth.
If possible, avoid plasticizers and other liquid additives.
7.6.3 Ozone and weather resistance
Like any other double-bond-containing elastomers, vulcanizates based on
Krynac®/Perbunan® are sensitive to ozone attack.
Without antiozonants:
Low acrylonitrile polymers are more sensitive than high acrylonitrile
polymers
With suitable antiozonants (p-phenylenediamines, Vulkanox® 4020):
Low acrylonitrile polymers become more resistant than high acrylonitrile
polymers.
In general, even well-protected vulcanizates cannot withstand extreme condi-
tions. This is due to the fact that antiozonants become compatible with the
polymer at an increased level of polarity and are then no longer effective in
protecting the surface against ozone.
It is important to note that fluxed blends of NBR and PVC show very good
ozone resistance. Cracks are not formed even under severe test conditions.
Antiozonants enhance this effect, but are not absolutely essential. Vulcani-
zates of this kind are very suitable for weather-resistant applications.
Blends of Krynac®/Perbunan® and EVM (Levapren®) also improve the ozone
resistance significantly.
When it comes to safety: Perbunan®.
Page 20 of 32: This document contains important information and must be read in its entirety.20
7.6.4 Applications in electrical technical articles
Acrylonitrile butadiene rubbers are frequently used in cable compounds
including elastomers. The following are some examples:
Anti-adhesion properties: semi-conductive layers in heavy-duty cables are
mostly based on blends of ethylene vinylacetate rubber, EVM (Levapren®)
and Krynac® and Perbunan® (or, if continuous processing from the very
beginning is required: Baymod® N).
For cable sheating vulcanizate blends of Krynac®/Perbunan® and PVC are
state-of-the-art to achieve ozone resistance and oil resistance where required.
For a halogen-free version, blends of Krynac®/Perbunan® and EVM
(Levapren®) are recommended.
As polymers produced by emulsion techniques, Krynac®, Perbunan® and
Baymod® N have limited uses as base polymers for insulation compounds.
7.6.5 Physiological properties
The use of Krynac® and Perbunan® in technical rubber goods with which
humans come into contact generally poses no problems, although some
special aspects have to be taken into consideration, depending on specific
laws and regulations.
Rubber articles intended for repeated use in contact with vegetable oils,
fats and greases are permitted by almost all governmental and international
regulations.
For example the US FDA regulation CFR 21 § 177.2600 includes NBR,
provided the extraction limits according to CFR 21§180.22 are adhered to
the vulcanizate.
Regarding the German BfR (Federal Institute for Risk Assessment) Recom-
mendation XXI permits NBR as well if the migration limits are not exceeded.
In general, Krynac® and Perbunan® polymers are well suited to these require-
ments, although some grades are excluded. Therefore, in case of interest, the
reader is requested to contact LANXESS TRP for confirmation.
Rubber articles for potable water applications
The regulations in this area of application differ considerably from country to
country. In general, Krynac® and Perbunan® are both possible candidates.
Provided the strict rules of compounding are followed, the requirement
regarding organoleptic properties, for example, are fulfilled. LANXESS is
prepared to disclose confidential details of the polymer composition to the
local authorities upon request.
Rubber articles in pharmaceutical use
Krynac® and Perbunan® have proved themselves in some seals and gaskets
in pharmaceutical applications.
Milking machine with rubber components approved for food contact
FAVORABLE PROPERTIES OF KRYNAC® AND PERBUNAN®
IN RUBBER ARTICLES
Ideally suited for use in hygienically sensitive areas.
Page 21 of 32: This document contains important information and must be read in its entirety. 21
Attractive and tough: non-corrosive and flame-retardant floorings
based on Krynac® (pict.: nora systems GmbH)
Com
pre
ssio
n s
et 2
4h
/RT
(%
) 45
40
35
30
25
20
Amount of low molecular weigth plasticizer
Baymod® N XL 32.32 (parts per 100 in PVC)
0 10 20 30 40
80 %
60 %
Fig. 21: Favorable extrusion properties achieved with
pre-crosslinked Baymod® N
Baymod® N grades for plastic modification
non pre-crosslinked pre-crosslinked
Baymod® N grade 34.52 34.82 34.92 VP XL 32.32 XL 32.12
acrylonitrile content* (%) 33 33 33 31.5 31.5
ML 1+4/100 °C (MU) 40-50 65-75 80 35-60 35-60
average particle diameter (mm) 0.7 0.7 0.6 0.4 0.4
partitioning agent calcium stearate calcium stearate silica PVC silica
Application of Baymod® N in PVC modification
favorable properties
Crashpad skins low level of fogging,
good dimensional stability
Sheeting good permanent flexibility, low migration,
low volatility and extraction of the plasticizer
Oil and fuel hose good resistance to oil and gasoline,
low migration of the plasticizer
Profiles improved low temperature flexibility,
improved compression set
Cables good physical properties,
good low temperature flexibility
Conveyor belts good resistance to oils and greases,
long service life
Shoe soles good mechanical properties,
good abrasion and wear resistance
The basic effect of pre-crosslinked Baymod® N XL 32.32 in PVC:
Improvement of the compression set
Page 22 of 32: This document contains important information and must be read in its entirety.22
Acrylonitrile butadiene copolymers in some cases form a uniform mixed
phase in blends with some polar thermoplastic polymers, e.g. PVC.
PVC is a rigid material. Monomeric plasticizers convert rigid PVC into a soft
material that stays flexible over a wide range of lower temperatures.
Flexible acrylonitrile butadiene polymers have a similar effect. This set of
properties can be achieved with the ground acrylonitrile butadiene polymers
of the Baymod® N range, which is summarized in the following table.
Pre-crosslinked Baymod® N grades give better extrusion performance and
surface characteristics of the finished profile, while non-pre-crosslinked
polymers are primarily recommended for molded parts.
Figure 21 shows the effect of non-pre-crosslinked and pre-crosslinked
Baymod® N grades on the extrusion performance of a PVC compound.
BAYMOD® N AS POLYMERIC ADDITIVES FOR PLASTICS
Pre-crosslinked Baymod® N XL 32.32
Non pre-crosslinked Baymod® N 34.52
Non pre-crosslinked Baymod® N 34.82
* measured on the base rubber before grinding
Page 23 of 32: This document contains important information and must be read in its entirety. 23
Baymod® N XL 32.32 monomeric standard plasticizer
Vol
um
e lo
ss (
mm
3)
160
140
120
100
®
Parts by weight of NBR/monomeric standard plasticizer
0 10 20 30 40
Wei
gh
t lo
ss (
%)
0
-5
-10
-15
-20
-25
Baymod® N XL 32.32 monomeric standard plasticizer
Parts by weight of NBR/monomeric standard plasticizer
0 10 20 30 40
Baymod® N XL 32.32 monomeric standard plasticizer
Wei
gh
t lo
ss (
%)
0
-5
-10
-15
-20
-25
-30
®
Parts by weight of NBR/monomeric standard plasticizer
0 10 20 30 40
Fig. 22: Abrasion resistance
(DIN 53516)
Fig. 24: Oil resistance
(IRM 903; 168 h; 100 °C)
Fig. 23: Fuel resistance
(Iso-octane/toluene 70/30; 70 h, 22 °C)
Pre-crosslinked NBR polymers in PVC help to develop the rubber-like dry
feeling of thermoplastic articles with good mechanical properties such as
low abrasion and low compression set values. Pre-crosslinked NBR polymers
enhance the resistance to oil and fuel. Increased resistance (from regular to
permanent) can be achieved for diluted mineral acids and bases.
Unlike common plasticizers, compatible polymeric materials migrate less
under extractive conditions, which is essential for some applications. They
also generate a minimum of evaporation loss under heat and irradiation
conditions and thus are outstanding with regard to the fogging properties
of the thermoplastic part.
To summarize: The addition of Baymod® N to PVC compounds improves
the abrasion resistance and enables compliance with the requirements of
safety footwear, for example (see Fig. 22).
Flexible PVC plasticized with monomeric plasticizers becomes brittle and
rigid due to plasticizer migration when exposed to extractive media such as
fuels. The addition of Baymod® N makes it possible to reduce the level of
extractables significantly (see Fig. 23).
Baymod® N has a positive impact on the swelling resistance of PVC-based
articles in oils and technical fluids (see Fig.24).
Apart from PVC, NBR-modifying polymers are also recommended for linear
polyamides (PA) and acrylonitrile-butadiene-styrene-based materials (ABS).
Examples of PVC-based articles that require the additional use of Baymod® N
are door and window sealing strips, refrigerator seals, spiral hoses, tubes for
air and water, conveyor belts, tarpaulins and safety footwear.
Baymod® N is a valuable asset in the building industry
Fig. 25: Improvement of the impact resistance of phenolic resins
by adding Baymod® N XL 38.43
Imp
act
resi
stan
ce(k
j/m
2) 25
20
15
10
5
0
Baymod® N XL 38.43 (weight %)
0 5 10 15 20
Baymod® N grade for friction parts
pre-crosslinked / spray-dried
Baymod® N grade XL 38.43
acrylonitrile content* (%) 34
ML 1+4/100 °C (MU) -
average particle diameter (mm) 0.12
partitioning agent CaCO3
Fig. 26: Particle structure of Baymod® N XL 38.43 compared with Baymod® N 34.52
Page 24 of 32: This document contains important information and must be read in its entirety.24
BAYMOD® N AS A POLYMERICCOMPONENT IN FRICTION PARTS
The main purpose of a friction material is to stop the vehicle by converting
mechanical energy smoothly and in a controlled fashion into heat. In practice,
brake units can heat up to such an extent that heat dissipation may become a
problem. Friction material should have a stable friction coefficient (µ) suitable
for the application. This should remain constant throughout the material’s life
under all conditions of temperature and pressure.
The coefficient of friction is the key property of friction linings and pads.
Baymod® N XL 38.43 increases the coefficient of friction just in the tempera-
ture range of 50 °C to 200 °C, where most braking action starts to take place
(see Fig. 27).
Safety and reliability are key terms in brake and clutch lining technology for
which acrylonitrile-butadiene copolymers are essential components in mix-
tures containing phenolic resins and various other inorganic and organic
ingredients. NBR rubber is an effective binder to increase the flexibility of
friction materials. Rubber is also active as a material that encapsulates the
abrasive powders, thus decreasing wear of the metal rotor.
LANXESS has developed a free-flowing grade which is tailor-made for this
application the spray-dried grade Baymod® N XL 38.43 (properties see
table). In the microscopic image (see Fig. 26) the spray-dried Baymod® N
XL 38.43 is compared with ground Baymod® N 34.52.
The spray drying process leads to regular spherical particles with an
average diameter of 20 µm. This structure allows homogenous distribution
in the mixtures for pads prior to hardening.
By contrast, a ground polymer like Baymod® N 34.52 consists of particles
that are fairly coincidental and irregular as a result of the grinding process,
and is less favorable in brake and clutch pad applications.
Baymod® N XL 38.43 is used as a modifier for phenolic resins. A significant
increase in the Charpy impact resistance can be observed when Baymod® N
XL 38.43 is added (see Fig. 25).
* measured on supplied material
Page 25 of 32: This document contains important information and must be read in its entirety. 25
Coe
ffic
ien
t of
fric
tion
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
Baymod® N XL 38.43 without Baymod ® N XL 38.43
Temperature (°C)
0 100 200 300 500400
Baymod® N XL 38.43 ensures controlled braking under difficult conditions
Fig. 27: Comparison of the coefficient of friction at
various temperatures
Safely down the road with a heavy load....
Page 26 of 32: This document contains important information and must be read in its entirety.26
Technical foams made from Perbunan® for
reliable pipe insulation against heat and cold
Machine overbraiding hoses with metal or textile
(photo.: Herzog)
Oil-resistant Perbunan® keeps print rollers rolling
without fatigue
Marathon-tested soles made of Krynac® with high resistance to wear and abrasion
EXAMPLES FOR THE USE OF KRYNAC®, PERBUNAN® AND BAYMOD® N
Page 27 of 32: This document contains important information and must be read in its entirety. 27
Product range and typical properties
Acrylonitrilecontent (%)
Mooneyviscosity(1) ML 1+4/100°C (MU)
Density(g/cm3)
plasticizer content (phr)
Supplyform
Standardpackaging
Remarks
General purpose grades, medium-fast curing
Krynac® 2645 F 26.0 45 0.96
bales
25 kg bales on
pallets, contents:
900 kg or 1050 kg
Krynac® 2840 F 28.0 38 0.96
Krynac® 2850 F 27.5 48 0.97
Krynac® 2860 F 28.0 60 0.97
Krynac® 3330 F 33.0 30 0.97
Krynac® 3345 F 33.0 45 0.97
Krynac® 3370 F 33.0 70 0.97
Slow curing grades
Krynac® 2950 F 30.0 53 0.97
bales
25 kg bales on
pallets, contents:
900 kg or 1050 kg
Krynac® 3360 F 33.0 57 0.97
Krynac® 4045 F 38.0 45 0.97
Krynac® 4450 F 43.5 50 1.00
Krynac® 4955 VP* 48.5 55 1.01
High molecular weight grades (medium-fast curing)
Krynac® 3380 VP* 33.0 80 0.97bales
25 kg bales on pallets, contents: 900 kg or 1050 kg Krynac® 33110 F 33.0 110 0.97
Plasticizer-extended grade (phthalate free)
Krynac® M 3340 F 22.0 34 0.98 52 bales 25 kg bales on pallets, contents: 900 kg or 1050 kg
for soft vulcanizates; plasticizer Mesamoll®
High oil resistant grades (medium-fast-curing)
Krynac® 3950 F 38.5 50 0.99
bales
25 kg bales on
pallets, contents:
900 kg or 1050 kg Krynac® 4975 F 48.5 75 1.01
(1) unmassed, ISO 289 (2) massed * Trialproduct (VP=Versuchsprodukt), please see page 30.
Pre-crosslinked grades
Acrylonitrilecontent (%)
Mooney
viscosity(1) ML1+4/100°C (MU)
Density (g/cm3)
pre-crosslink charac- teristics
Supplyform
Standardpackaging
Remarks
Krynac® XL 3025 29.5 70 0.96 medium
25kg bales on pallets, contents 900 kg or 1050 k
Krynac® XL 3355 VP* 33.0 55 1.00 high bales
Krynac® XL 3470 F 34.0 70 (2) 0.99 high
Carboxylated grades
Acrylonitrilecontent (%)
Mooney
viscosity(1) ML1+4/100°C (MU)
Density (g/cm3)
Carboxylicacid (%)
Supplyform
Standardpackaging
Remarks
Krynac® X 146 32.5 45 0.97 1
bales
25kg bales on
pallets, contents
900 kg or
1050 kg
for excellent wear
and abrasion
resistance,
high modulus
vulcanizates
Krynac® X 160 32.5 58 0.97 1
Krynac® X 740 26.5 38 0.99 7
Krynac® X 750 27.0 47 0.99 7
For the grades Krynac® 4045 F, Krynac® 4450 F and Krynac® 4955 VP* are slow curing grades see list of „slow curing grades“
for improved extrusion and calendering (processing rate,lower shrinkage,better collapse resistance, surface)
excellent processing safety, good storage capability of cured compounds
for soft vulcanizates / vulcanizates with best vulcanizate properties
excellent oil resistance, good resistance against fuels
Page 28 of 32: This document contains important information and must be read in its entirety.28
General purpose grades, fast curing
Acrylonitrilecontent (%)
Mooneyviscosity (1) ML1+4/100°C (MU)
Density(g/cm3)
Supplyform
Standardpackaging
Remarks
Perbunan® 2845 F 28.0 45 0.96
bales
Perbunan® 2870 F 28.0 70 0.96
Perbunan® 3430 F 34.0 32 0.97
Perbunan® 3445 F 34.0 45 0.97
Perbunan® 3470 F 34.0 70 0.97
Clean high modulus grades (CHM-grades), fast curing
Perbunan® 2831 F 28.6 30 0.96
Perbunan® 2846 F 28.6 42 0.96
Perbunan® 3431 F 34.7 29 0.97 bales
Perbunan® 3446 F 34.7 42 0.97
Perbunan® 3481 F 34.7 78 0.97
Perbunan® 1846 F belongs to the group of CHM grades, as well
Grades with very good low temperature flexibility
Perbunan® 1846 F 18.0 45 0.93
bales Perbunan® 2255 VP* 22.0 57 0.94
High molecular weight grades
Perbunan® 2895 F 28.0 95 0.96
bales Perbunan® 28120 F 28.0 120 0.96
High oil resistance grades (medium-fast-curing)
Perbunan® 3945 F 39.0 45 0.99
bales
Perbunan® 3965 F 39.0 65 0.99
Perbunan® 3976 VP* 40.0 65 0.99
Perbunan® 4456 F 44.0 55 1.01
Perbunan 3976 VP * and 4456 F belong to the group of CHM grades, as well
(1) unmassed, ISO 289
* Trial product (VP=Versuchsprodukt), please see page 30.
25 kg bales on pallets, contents: 900 kg or 1050 kg
25 kg bales on pallets, contents: 900 kg or 1050 kg
25kg bales on pallets, contents: 900 kg or 1050 kg
25kg bales on pallets, contents: 900 kg or 1050 kg
25kg bales on pallets, contents: 900 kg or 1050 kg
„low mould fouling“ grades,best vulcani-zate properties, low level of extractables, recommended for potable water
For seals and other articles with stringent low temperature requirements
excellent oil resi-stance, good resistance against fuels
for soft vulcanizates; good dynamic properties
Product range and typical properties
Page 29 of 32: This document contains important information and must be read in its entirety. 29
Packaging: bale of 25 kg
Product range and typical properties
Gel-Type P (g/cm3) d60 (nm) Ospec (m2/g) TG (°C) OH-cont.
(mg KOH/g)
Nanoprene® B P600H VP* SBR 1.06 47.4 126 60 20,5
Nanoprene® B P400H VP* SBR 1.04 40.3 146 37,5 34,6
Nanoprene® B PM00OH VP* SBR 1.02 50 125 -2,5 25,1
Nanoprene® B M10OH VP* SBR 1.02 50 125 -9 27,3
Nanoprene® B M15OH VP* SBR 1.0 45.5 132 -14,5 25,2
Nanoprene® B M75OH VP* BR 0.94 50.9 127 -77 32,8
Product range and typical properties
Acrylonitrile
content (base
polymer) (%)
Mooney
viscosity (1) ML
1+4/100°C (MU)
Density
(g/cm3)
Average
particle
size (mm)
Partitioning
agent
Standard
packaging
Remarks
Non pre-crosslinked grades
Baymod® N 34.52 33.0 45 0.98 0.70calcium
stearate
25 kg boxes (polyeth-
ylene-lined) on pallets,
contents: 750 kgBaymod® N 34.82 33.0 70 0.98 0.70
Baymod® N 33114 33 .0 110 0.98 0.60 Silica 25 Kg boxes (polyeth-
ylene-lined) on pallets,
contents 750 Kg
Pre-crosslinked grades
Baymod® N XL 32.12 31.5 47.5 1.01 0.40 Silica
25 kg boxes (polyeth-
ylene-lined) on pallets,
contents: 750 kg;
Baymod® N
XL 3364 VP*
33.0 55 1.00 0.40 Silica
Baymod® N XL 32.32 31.5 47.5 1.01 0.40 PVC
Baymod® N
XL 33.61 VP*
33.0 55 1.00 0.40 PVC
Baymod® N XL 38.43 34.0 115 (2) 1.04 0.12 calcium
carbonate
brake and
clutch pads
* Trial product (VP=Versuchsprodukt), please see page 30.
NANO ADDITIVE BASED ONBUTADIENE STYRENE ANDACRYLATES
POWDERED ACRYLONITRILE-BUTADIENE RUBBER
(1) unmassed, ISO 289
(2) massed
* Trial product (VP=Versuchsprodukt), please see page 30.
Polymer soluble
in methyl-ethy-
glycole, application
in organic
solvents possible,
for gaskets
thermoplastic
modification,
especially for PVC
Page 30 of 32: This document contains important information and must be read in its entirety.30
CONTACT DATA
TECHNICAL
EUROPE
LANXESS Deutschland GmbH
HPE
Leverkusen, Germany
+49 214 30 46396
NORTH AMERICA
LANXESS Corp.
HPE
Pittsburgh PA, USA
+ 1 269 429 0581
SOUTH AMERICA
LANXESS Indústria de Produtos Quimicos e Plásticos LTDA.
HPE
Sao Paulo, Brazil
+55 11 3741-7928
APAC
LANXESS Pte. Ltd.
HPE
Singapore
+65 6725 5888
GREATER CHINA
LANXESS
Chemical (China) Co., Ltd.
HPE
Qingdao, P. R. China
+86 532 8082 2027
AMEC
LANXESS Deutschland GmbH
HPE
Leverkusen, Germany
+49 214 30 46396
Sales offices worldwide:www.sales-offices-hpe.lanxess.com
www.krynac.comwww.perbunan.comwww.baymod-n.comwww.hpe.lanxess.com
Sources:
Page 8: Kloeckner DESMA Elastomertechnik, Fridingen, Germany
Page 10: Trelleborg Sealing Solutions, Jönköping, Sweden
Page 12: SCHNEEGANS GmbH, Emmerich am Rhein, Germany
Page 13: Machine Works Rieter Ltd., Winterthus, Switzerland
Page 13: Forbo Siegling GmbH, Hannover, Germany
Page 16: Frenzelit-Werke GmbH & Co.KG, Bad Berneck, Germany
Page 17: R. Klinger Dichtungstechnik GmbH & Co. KG, Gumpoldskirchen,
Austria
Page 18: Trelleborg Rubore AB, Kalmar, Sweden
Page 21: nora systems GmbH, Weinheim, Germany
Page 26: August Herzog Maschinenfabrik GmbH & Co. KG, Oldenburg,
Germany
* Trial product
(VP = Versuchsprodukt = trial product). The information contained herein is
merely preliminary data. Testing as to properties and applications is not final.
Further information, including data which could change or add hazards with
use, may be developed. Such information may be needed to properly evalua-
te or use this product. Use is undertaken at the sole risk of the user.
COMMERCIAL
LANXESS Emulsion Rubber
HPE
La Wantzenau, France
+49 214 30 32634
LANXESS Corp.
HPE
Pittsburgh PA, USA
+ 1 412 809 4764
+55 11 3046-3353
LANXESS Pte. Ltd.
HPE
Singapore
+65 6725 5893
LANXESS
Chemical (China) Co., Ltd.
Technical Rubber Products
Shanghai, P. R. China
+86 513 8905 9123
LANXESS Deutschland GmbH
HPE
Leverkusen, Germany
sebastiaan.van-gemert
@lanxess.com
+49 214 30 56671
~
Page 31 of 32: This document contains important information and must be read in its entirety. 31
QUALITY AND SAFETY
Quality & Environmental Management
Krynac®, Perbunan®, Baymod® N are produced under strict control regarding
safety, environmental protection and quality. The whole supply chain, from
production to customer service, is covered by ISO 9001 and ISO 14001
certification.
Product safety
Relevant safety data and references as well as the necessary hazard warning
labels can be found in the Material Safety Data Sheet.
Food contact
Information concerning FDA and BfR compliance can be obtained on
request from the Health, Safety, Environment and Quality Department
(HSEQ) of Lanxess.
As with any product, use of the products mentioned in this publication in a
given application must be tested (including field testing, etc.) by the user in
advance to determine suitability.
Health and Safety Information:
Appropriate literature has been assembled which provides information
concerning the health and safety precautions that must be observed when
handling the LANXESS products mentioned in this publication. For materials
mentioned which are not LANXESS products, appropriate industrial
hygiene and other safety precautions recommended by their manufacturers
should be followed. Before working with any of these products, you must
read and become familiar with the available information on their hazards,
proper use and handling. This cannot be overemphasized. Information
is available in several forms, e.g., material safety data sheets and product
labels. Consult your LANXESS representative in Germany or contact the
Health, Safety, Environment and Quality Department (HSEQ) of LANXESS
Germany or - for business in the USA - the LANXESS Product Safety and
Regulatory Affairs Department in Pittsburgh, PA.
Regulatory Compliance Information: Some of the end uses of the products
described in this publication must comply with applicable regulations, such
as the FDA, BfR, NSF, USDA, and CPSC. If you have any questions on the
regulatory status of these products, contact your LANXESS Corporation
representative, the LANXESS Regulatory Affairs Manager in Pittsburgh,
PA or the Health, Safety, Environment and Quality Department (HSEQ) of
LANXESS Germany.
The manner in which you use and the purpose to which you put and utilize
our products, technical assistance and information (whether verbal, written
or by way of production evaluations), including any suggested formulations
and recommendations, are beyond our control. Therefore, it is imperative that
you test our products, technical assistance and information to determine to
your own satisfaction whether they are suitable for your intended uses and
applications. This application-specific analysis must at least include testing
to determine suitability from a technical as well as health, safety, and
environmental standpoint. Such testing has not necessarily been done by us.
Unless we otherwise agree in writing, all products are sold strictly pursuant
to the terms of our standard conditions of sale. All information and technical
assistance is given without warranty or guarantee and is subject to change
without notice. It is expressly understood and agreed that you assume and
hereby expressly release us from all liability, in tort, contract or otherwise,
incurred in connection with the use of our products, technical
assistance, and information.
Any statement or recommendation not contained herein is unauthorized and
shall not bind us. Nothing herein shall be construed as a recommendation
to use any product in conflict with patents covering any material or its use.
No license is implied or in fact granted under the claims of any patent.
Forward-looking statements
This product information contains forward-looking statements based on
current assumptions and forecasts made by the LANXESS AG management.
Various known and unknown risks, uncertainties and other factors could lead
to material differences between the actual future consolidated results, finan-
cial situation, development or performance of the company, and the estimates
given here. The company assumes no liability to update such forward-looking
statements or to adapt to future events or development.
Krynac® and Perbunan® are registered trademarks of LANXESS Deutschland
GmbH. Baymod® is a registered trademark of Bayer AG, Germany.
© 2013, LANXESS Deutschland GmbH. All rights reserved.
Page 32 of 32: This document contains important information and must be read in its entirety.32
NBR ENERGIZED BY
Our state-of-the-art polimerization enables state-of-the-art solutions for our customers. Krynac® Perbunan® and Baymod® N – quality-brands for definitely convincing results.
Order no: LXS-HPE 002, Edition: 2013-01, Printed in Germanywww.lanxess.com