Viton® and Vamac families: Chemical structure and monomer composition
Transcript of Viton® and Vamac families: Chemical structure and monomer composition
Viton® and Vamac families:
Chemical structure and monomer composition
April 13, 2010 DuPont Confidential
2Monomers used in Viton®
F2C=CF-CF3 (76% fluorine)
hexafluoropropylene
HFP
F2C=CF2 (76% fluorine)tetrafluoroethylene
TFE
H2C=CF2 (59% fluorine)vinylidene fluoride
VF2
H2C=CH2
ethylene
E
H2C=CH-CH3
propylene
P
Carbon
Hydrogen
Fluorine
Oxygen
F2C= CF-O-CF3 (69% fluorine)
perfluoromethylvinylether
PMVE
April 13, 2010 DuPont Confidential
3Viton® Fluoroelastomer Families-Monomer Composition
*Cure Site Monomer (composition depends on polymer)
VF2 HFP TFE PMVE EP CSM*
A
66%F
BF
AL
66-70%F
Standard Viton®
GAL-SGBL-SGF-S
65.5-70%F
GLT-SGBLT-S GFLT-S
64.5-67%F
ETP-S
66%F
TBR-S
60%F
Viton® ExtremeTM
Viton® made with APA
Low Temperature
Specialty Viton®
April 13, 2010 DuPont Confidential
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«A» and
«GAL-S» families
66% Fluorine
«B» and
«GBL-S» families
68% Fluorine
«F» and
«GF-S» families
70% Fluorine
Most Fluid Resistant
Families of Viton®
Incre
asin
gF
luo
rin
e
Improving
Chemical Resistance
+
Decre
asin
gH
yd
rog
en
Standard Viton®
«GLT-S» family
64% Fluorine
«GBLT-S » family
66% Fluorine
«GFLT-S» family
67% Fluorine
VTR-8802/8804, 60% fluorine
ETP-S, 67% fluorine
Viton® ExtremeTM
Specialty Viton®
Low Temperature
Note: polymers with names ending with an “S” are based on Advanced Polymer Architecture
(APA) technology
Relative Performance of Viton®Fluoroelastomer Families
April 13, 2010 DuPont Confidential
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low
��������
��������
����
����
65.5%
peroxide
GAL-S
low
���� ����
��������
����
����
66%
bisphenol
AL
low
BEST
����
����
����
66%
bisphenol
A
Heat resistance
low
����
����
BESTBESTBESTBEST
����
60%
bisphenol
TBR-S
medium
���� ����
���� ����
����
����
66%
peroxide
GBLT-S
medium
���� ����
BESTBESTBESTBEST
����
����
64.5%
peroxide
GLT-S
medium
���� ����
���� ����
����
���� ����
67%
peroxide
GFLT-S
low
���� ����
����
����
���� ����
70%
peroxide
GF-S ETP-SGBL-SFBViton® product
BESTBESTBESTBEST�������� ��������Chemical resistance* *
peroxideperoxidebisphenolbisphenolCuring system
highlowlowlowRelative cost of polymer
�������� ������������ ����Compression set resistance
����������������
Low temperature properties
BESTBESTBESTBEST������������Base resistance
66%67.5%70%68.5%Fluorine content
Excellent ���� ���� Very good ���� Good ���� Fair ���� PoorBEST
“S” indicates products made with Advanced Polymer Architecture* Consult the Chemical Resistance Guide at www.dupontelastomers.com or contact your Viton® specialist.
Viton® Relative Performance
All Viton® products have outstanding thermal properties
April 13, 2010 DuPont Confidential
7Viton® Fluoroelastomers Typical Applications
High fluorine for best
chemical resistance
(e.g. steam and acid)
High fluorine for best
chemical resistance
(e.g. steam and acid)
Easy processing
low fluorine
(e.g.standard o-
rings)
Easy processing
low fluorine
(e.g.standard o-
rings)
Best
low temperature
performance
(e.g. fuel injector
o-rings)
Best
low temperature
performance
(e.g. fuel injector
o-rings)
High fluorine with low
temperature functionality
(e.g. fuel systems)
High fluorine with low
temperature functionality
(e.g. fuel systems)
-35
-30
-25
-20
-15
-10
-5
0
0 5 10 15 20 25 30 35
Volume swell upon immersion in M15 / 7 d / room-temperature (%)
Lo
w t
em
pera
ture
fle
xib
ilit
yT
R-1
0
(°C
)
ALALGALGAL--SS
BB
GFLTGFLT--SS
GLTGLT--SS
GBLTGBLT--SS
Best compression set and processing
Best fluid resistance
GBLGBL--SS AA
GFGF--SS
(F)(F)
Broadest fluid
resistance
(e.g. down
hole)
Broadest fluid
resistance
(e.g. down
hole)
ETPETP--SS
red for Viton® made with APA (« -S » for APA technology);
« G » for peroxide curing vs. bisphenol curing, « LT » for low temperature
Vamac®
Ethylene Acrylic Elastomer (AEM)
General Introduction
February 2010
April 13, 2010 DuPont Confidential
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Vamac® on the Elastomer’s Map
Classification by ASTM D-2000
HeatRes.70 hrs
Oil Resistance% Swell in IRM 903 Oil
No Req 170 120 100 80 60 40 20 10
Butyl
70
100
125
200
225
250
Styrene Butadiene
Natural Rubber
Neoprene
CSM
Vamac®
Viton®
Silicone
EPDM
Fluorosilicone
Polyacrylate (ACM)
HNBR
Epichlorohydrin
Nitrile
NBR/PVC
CPE
V Solutions SpaceSealing & Hose Applications
HiTemp-ACM
150
175
165
Applications with
min. temperature requirements of
165 degrees
Applications with reduced
swell
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AEM G -Type Terpolymer
(CH2-CH2)x – (CH-CH2)y – (R)z
| |
O=C C=O
| |
OCH3 OH
Ethylene, Methyl Acrylate, Acidic Cure Site
Chemical Structure
(A) Monomers Choice and Ratio
(B) Molecular Weight
Distribution Optimization.
New products
Starting from Vamac® G, new products can be obtained by (A), (B) or (C) to meet customers required performances.
(C) Adjustments at Finishing step.
April 13, 2010 DuPont Confidential
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Vamac® - Grade Selection
AEM G -TYPE Terpolymer AEM D -TYPE Dipolymer
(CH2-CH2)x – (CH -CH2)y – (R)z (CH2-CH2)x – (CH -CH2)y
| | |
C =O C=O C = O
| | |
OCH3 OH OCH3
Diamine Cure Peroxide Cure
VAMAC® GRADES
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Vamac® Product Line and DevelopmentsLower oil swell
Best Low T properties
Better properties,faster cure
Higher viscosity
Best Dynamic Flex Fatigue
(Turbo Hoses)
Peroxide Cure
Limited Post-Cure
Vamac® DP
Vamac® G Vamac® GLS
Vamac® GXF
Vamac® HVG
VMX-3038 (developmental)
Vamac® Ultra LT
Vamac® Ultra IP (VMX-3040)
VMX-3110 (developmental)
Best Processing and Compression Set
Properties
High ViscosityGrades
VMX-3121(low swell version,
experimental)
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High Viscosity Grades
Best Compression
Set, Fast Cure, Low
Oil swell
Molded parts with best fluid and
lubricant resistance
Best Dynamic
Fatigue Resistance;
High Temperature Turbo Charger
Hoses
Best Compression
Set, Fast Cure
Low HardnessMolded parts, Seals
& Gaskets, High
pressure hoses
Major Features;
Main Application(s)
Vamac® VMX-311030 MU, -25 °C
Vamac® VMX-303830 MU, -32 °C
Vamac® Ultra IP29 MU, -31 °C
High Viscosity Grade
ML (1+4) 100°C, Tg
Vamac® GLS18.5 MU, -24 °C
Vamac® GXF17.5 MU, -31 °C
Vamac® G16.5 MU, -30 °CStandard Grade
ML (1+4) 100°C, Tg
Vamac® VMX-3121
31-33 MU, -26 °CHigh MA version of
VMX-3038
Vamac® - Standard and High Viscosity Grades
April 13, 2010 DuPont Confidential
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Vamac® Grade Description
Best HT properties
30.0Talilored MW and Monomer contentVMX-3038
16.5Standard GradeG
Low T resistance11.0New copolymerUltra LT
Target
Performances
Polymer
22.0 +/-3
16.5
29.0
18.5
26.0
18.5
ML 1’+4’(100°C)
Better processTailored MW distributionUltra IP
Fatigue resistance
Modified cross-link densityGXF
No post-cure
Polymer Modification
Green strength
Improved Fluid resistance
Covalent precrosslinkHVG
DiPolymer, No acidic cure siteDP
Specific Finishing ProcessMR
Increased MA %for higher polarityGLS
FeaturesGrade
Dia
min
ecu
rep
ero
xid
e
Vamac® grades tailored on a target performance to meet customers needs.
On-line Tools
April 13, 2010 DuPont Confidential
16Wall Chart for Viton®, a Selection Guide
Viton®
Product
Name
Nominal
Viscosity
(ML 1 +
10 @
121°C)
Specific
Gravity
Polymer
fluorine
content,
%
Compression
set, %
70 hr @
200°C
Temperature
Retraction
(TR-10), °C
Volume
Increase,
CM-15
Fuel @
23°C co
mp
res
sio
n
Tra
ns
fer
Inje
cti
on
me
tal
bo
nd
ing
Ex
tru
sio
n
Ca
len
de
rin
g
Co
ati
ng
s /
Ma
sti
cs
A and AL types: Standard FKM - excellent compression set and heat resistanceCurative Containing Precompounds ("C" at end of product name)
A331C 30 1.81 66 20 -17 30% X X X X X
A361C 30 1.81 66 17 -17 30% X X X X X X
VTR-9180 30 1.81 66 18 -17 30% X X X X
A401C 40 1.81 66 15 -17 30% X X X X
A601C 60 1.81 66 10 -17 30% X X X X
VTR-9192 32 1.76 66 25 -19 32% X X X
Gum Polymers
A100 10 1.82 66 21(2)
-17 30% X X X X X
A200 20 1.82 66 16(2)
-17 30% X X X X X X
A500 50 1.82 66 14(2)
-17 30% X X X X X
A700 70 1.82 66 11(2)
-17 30% X X X X X
AHV 160 (1)
1.82 66 10(2)
-17 30% X X X
AL300 30 1.77 66 15(2)
-19 32% X X X X X X
AL600 60 1.77 66 -19 32% X X X X X X
Molding Others
Product name
Mooney viscosity
Specific gravity & % fluorine
Comp set & TR-10
Vol. swell, M-15
Processing info
Viton® wall chart is available at www.dupontelastomers.com
April 13, 2010 DuPont Confidential
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Base resistance: Best resistance to aggressive amine based anti-corrosion additives ?
Base resistance: Best resistance to aggressive amine based anti-corrosion additives ?
Hydrocarbon resistance (automotive fuels, etc.)?
Hydrocarbon resistance (automotive fuels, etc.)?
High resistance to oxygenated-fuels(MeOH, MTBE), steam, acids?
High resistance to oxygenated-fuels(MeOH, MTBE), steam, acids?
Low temperature flexibility better
than -20°C?
Low temperature flexibility better
than -20°C?
yes
yes yes
yes yes
no
nono
no
ETP-S
GFLT-S
TBR-S
GFLT-S
GBLT-S GF-S
F GLT-SAL
GBL-S
A
Low temperature flexibility better
than -20°C?
Low temperature flexibility better
than -20°C?
no
B
Selection Based on Application Needs
black for standard Viton® ; red for Viton® made with APA (« -S » for APA technology)
April 13, 2010 DuPont Confidential
18On-line Viton® Selection Guide
April 13, 2010 DuPont Confidential
19On-line Chemical Resistance Guide
The CRG is a resource to help you choose the best elastomer for your application.Access to our on-line Chemical Resistance Guide (CRG) is available through the DuPont Performance Elastomers web site at www.dupontelastomers.com,where
detailed information about our product line may also be found.
April 13, 2010 DuPont Confidential
20Example 1: Water and Steam
Water Steam under 150°C Steam over 150°C
April 13, 2010 DuPont Confidential
21Example 2: Fuel C/Methanol (90%/10%)
April 13, 2010 DuPont Confidential
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On-line Application Guide for Viton® Made With APA
April 13, 2010 DuPont Confidential
23On-line Application Guide for Viton® Made With APA
April 13, 2010 DuPont Confidential
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ThankThank youyou for for youryour attention attention
The information set forth herein is furnished free of charge and is based on technical data that DuPont believes to be reliable and falls within the normal range of properties. It is intended for use by persons having technical skill, at their owndiscretion and risk. This data should not be used to establish specification limits nor used alone as the basis of design. Handling precaution information is given with the understanding that those using it will satisfy themselves that their particular conditions of use present no health or safety hazards. Since conditions of product use and disposal are outside our control, we make no warranties, express or implied, and assume no liability in connection with any use of this information. As with any product, evaluation under end-use conditions prior to specification is essential. Nothing herein is to be taken as a license to operate or a recommendation to infringe on patents.Caution: Do not use in medical applications involving permanent implantation in the human body. For other medical applications, discuss with your DuPont customer service representative and read Medical Caution Statement H-50103-3.
Copyright© 2010 DuPont™. The DuPont Oval logo, DuPont™, The miracles of science™, Viton®, Vamac®, are registered
trademarks of E.I. du Pont de Nemours or its affiliates. All rights reserved.