Post on 31-Mar-2016
description
E
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FUNCTIONAL FILLERSFOR COATINGS
Publisher:HOFFMANN MINERAL GmbH
Muenchener Strasse 75 • 86633 Neuburg (Donau) • GermanyPhone +49 (0) 84 31-53-0 • Fax +49 (0) 84 31-53-3 30
info@hoffmann-mineral.com • www.hoffmann-mineral.com
2 3
Structure and Mineralogical Composition The Genesis of Neuburg Siliceous Earth
fig. 3
fig. 2
fig. 1
Classic Neuburg Siliceous Earth – also called Sillitin and Sillikolloid –
is a natural combination of corpuscular, crypto-crystalline and amor-
phous silica and lamellar kaolinite: a loose structure impossible to
separate by physical methods. As a result of natural formation, the
silica portion exhibits a round grain shape and consists of aggrega-
ted crypto-crystalline primary particles of about 200 nm diameter
which are covered by amorphous silica opal-like. Such a unique
structure is responsible for a relatively high specific surface area and
oil absorption, which result, besides rheological activity, also in a
whole range of application advantages.
Neuburg Siliceous Earth is a raw
material with a history – one that star-
ted 95 million years ago! At that time,
large parts of South Germany were
covered by the sea, and in a bay
within what is now Bavaria, the various
strata of Neuburg Siliceous Earth were
deposited on limestone sediment
dating from the later Jurassic period
(fig. 1). After the sea receded, the
limestone strata collapsed, forming
so-called karst funnels into which the
siliceous earth fell and was preserved
(fig. 2). This is where a raw material
was created which – wherever you
search for it on this earth – is totally
unique (fig. 3).
Stratum 1: Fine sand
Stratum 2: Siliceous Earth
Stratum 3: Coarse sand
Stratum 4: Clay
Stratum 5: Limestone
Stratum 6: Overburden
4 5
1
2
3
4
7
8
9 10
1112
5 6
Step 1–3: Charging and crushing of raw earth,
separation of coarse material by vibrator screens.
Step 4–5: Dissolving, separation of gravel fractions
and dispersion in water.
Step 6: Separation of sand fractions and classification
into different grain sizes by hydrocyclones.
Step 7–10: Densification, storage and blending of individual
product types in the form of slurry.
Step 11–12: Removal of water in filter presses; elimination
of residual water in dryers.
The Separation Process
6 7
D(x) in %
90
80
70
60
50
40
0
20
30
10
50 20 10 1 0.5 0.2 0.1
x in μm
97 %
50 %
100
4.0 3.0 1.9 1.5
18.0 16.0 9.0 6.0
Sillitin V Sillitin N Sillitin Z Sillikolloid P
The following table and diagram summarize the physical properties
and the chemical composition of the Neuburg Siliceous Earth. The
most important variations are particle size and color.
The Neuburg Siliceous Earth is available in four different grain
fractions.
The determination of these particle size
distributions was based on Fraunhofer
diffraction spectra. The analyses were
run on a laser instrument Master-sizer S
from Malvern.
Neuburg Siliceous Earth – our Range at a Glance
8 9
Sillitin V Sillitin N Sillitin Z Sillikolloid P
incr
easi
ng
co
lor
neu
tral
ity
decreasing medium grain size
N 82
Furthermore the Neuburg Siliceous Earth is available in a range of
color shades from yellow to off-white to white, according to particle
size distribution.
V 88
V 85
N 87
N 85
Z 89
Z 86
P 87
Neuburg Siliceous Earth – our Range at a Glance
10 11
Product Characteristics of and
EINECS-No.: 310-127-6
CAS-No.: 1020665-14-8 (Siliceous Earth)
CAS-No.: 7631-86-9 (silica), 1318-74-7 (kaolinite)
TSCA-No.: 7631-86-9 (silica), 1318-74-7 (kaolinite)
Characteristics Unit Method SillitinV 85
SillitinV 88
SillitinN 82
SillitinN 85
SillitinN 87
SillitinZ 86
SillitinZ 89
SillikolloidP 87
Brightness Y
Brightness Z
DIN 53 163/measuring
geometry d/8°
82
76
86
88
77
65
82
75
83
76
82
75
86
86
82
76
Particle size D50
D97
�m
�m
Internal test procedure
Internal test procedure
4.0
18.0
4.0
18.0
3.0
16.0
3.0
16.0
3.0
16.0
1.9
9.0
1.9
9.0
1.5
6.0
Residue > 40 �m
> 200 �m
mg/kg
mg/kg
DIN ISO 787 part 18
DIN ISO 787 part 18
25
5
25
5
25
5
25
5
20
5
20
3
20
3
20
3
Volatile Matter at 105 °C % DIN ISO 787 part 2 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Electrical conductivity �S/cm DIN ISO 787 part 14 65 70 70 70 70 70 75 65
Density
Bulk density
Tamped density
g/cm3
g/cm3
g/cm3
DIN ISO 787 part 10
DIN ISO 903-1976
DIN ISO 787 part 11
2.6
0.35
0.60
2.6
0.30
0,60
2.6
0.30
0.50
2.6
0.30
0.50
2.6
0.30
0.50
2.6
0.25
0.40
2.6
0.21
0.40
2.6
0.25
0.35
BET Surface area
Oil absorption
m2/g
g/100 g
DIN ISO 9277
DIN ISO 787 part 5
8
45
8
45
11
45
10
45
10
45
11
55
10
55
12
55
Hardness silica/kaolinite
Abrasivity mg
acc. to Mohs
acc. to Einlehner
7/2.5
45
7/2.5
40
7/2.5
40
7/2.5
35
7/2.5
35
7/2.5
30
7/2.5
30
7/2.5
25
Refractive index n sin �/sin � 1.55 1.55 1.55 1.55 1.55 1.55 1.55 1.55
Water solubility
Acid solubility%
DIN ISO 787 part 3
DIN 53 770 (0.1 n HCl)
insoluble
0.4
insoluble
0.4
insoluble
0.5
insoluble
0.5
insoluble
0.5
insoluble
0.4
insoluble
0.4
insoluble
0.5
Chemical analysis:
SiO2
Al2O3
Fe2O3
%
%
%
DIN 51001 (XFA)
DIN 51001 (XFA)
DIN 51001 (XFA)
87
8
< 1
88
8
< 1
82
12
< 1.5
84
10
< 1
84
10
< 1
82
12
< 1
82
12
< 1
80
14
< 1
Mineralogical composition:
Crypto-crystalline silica
Amorphous silica
Kaolinite
Other minerals
%
%
%
%
based on X-ray diffrac-
tion pattern analysis
combined with Rietveld
70
8
17
5
70
8
17
5
60
10
25
5
65
10
20
5
65
10
20
5
0
10
25
5
60
10
25
5
55
10
30
5
The values shown in the table are to be considered as guidelines only. Material specifications and
technical data sheets for all products are part of our sales conditions and are available on our web site
www.hoffmann-mineral.com
12 13
Characteristics Unit Sillitin N 85puriss
Sillitin Z 86puriss
Sillitin Z 89puriss
Sillikolloid P 87 puriss
Brightness Y
Brightness Z
82
75
82
75
86
86
82
76
Particle size D50
D97
�m
�m
3.0
16.0
1.9
9.0
1.9
9.0
1.5
6.0
Residue > 40 �m
> 200 �m
mg/kg
mg/kg
8
1
8
1
8
1
8
1
Volatile Matter at 105 °C % 0.4 0.4 0.4 0.5
Electrical conductivity �S/cm 70 75 75 75
Density
Bulk density
Tamped density
g/cm3
g/cm3
g/cm3
2.6
0.30
0.47
2.6
0.23
0.37
2.6
0.21
0.40
2.6
0.21
0.35
Oil absorption g/100 g 45 55 55 55
Hardness silica/kaolinite
Abrasivity mg
7/2.5
35
7/2.5
30
7/2.5
30
7/2.5
25
Refractive index n 1.55 1.55 1.55 1.55
Water solubility
Acid solubility%
insoluble
0.5
insoluble
0.4
insoluble
0.4
insoluble
0.5
Dispersion time in
ester plasticizermin 3 7 7 8
Chemical analysis:
SiO2
Al2O3
Fe2O3
%
%
%
84
10
< 1
82
12
< 1
82
12
< 1
80
14
< 1
Mineralogical composition:
Crypto-crystalline silica
Amorphous silica
Kaolinite
Other minerals
%
%
%
%
65
10
20
5
60
10
25
5
60
10
25
5
55
10
30
5
Dispersion behavior in ester plasticizer
Stirred with blade mixer 1200 rpm, 20 % filler material, grain size (Hegman gauge) ≤ 20 mm
> 120 > 120 > 120
Dis
pers
ion t
ime in m
in.
Product Characteristics of puriss Grades
• Created by a downstream process.
• The extremely low residue > 40 μm is significantly reduced even
more.
• Significant reduction of abrasivity effect of this product series.
Protection of user’s processing equipment (e. g. mixers, tools,
airless spray nozzles).
• The puriss products are the first choice for all nonaqueous
formulas thanks to the excellent dispersion behavior.
They are recommended for solvent-free, resin-bonded systems
like polyester, epoxy and polyurethane.
• puriss versions are ideal for thin layers.
• Improved mechanical properties primarily for adhesives
and sealants.The values shown in the table are to be considered as guidelines only. Material specifications and
technical data sheets for all products are part of our sales conditions and are available on our web site
www.hoffmann-mineral.com
14 15
The Standard Range – the Surface-Treated Neuburg Siliceous Earth
(1) hydrophobic product, non-reactive
Specialties are available on demand.
Technical Data Sheets and Material Specification Sheets for all above mentioned products are given on our
web site www.hoffmann-mineral.com
Product Basic material Surface modification Typical applications
Aktisil VM 56 Sillitin Z 86 Vinyl silane Radical cured systems, (UP-resins, elastomers, UV-curing etc.)
Aktisil VM 56/89 Sillitin Z 89 Vinyl silane Radical cured systems, (UP-resins, elastomers, UV-curing etc.),
but brighter
Aktisil MAM Sillitin V 88 Methacrylic silane Radical- and radiation cured systems (UV-curing, UP-resins)
Aktisil MAM-R Sillitin V 85 Methacrylic silane Like MAM, but for lower demand on color neutrality
Aktisil EM Sillitin Z 86 Epoxy silane Reactive- and solid resins, industrial coatings, electro deposition
paint, anti-corrosive coatings
Aktisil AM Sillitin Z 86 Amino silane Reactive- and solid resins, powder coatings, thermo-plastics
(in particular polyamide), OEM hydro primer surfacer, anti-corrosive
coatings, MS adhesives
Aktisil MM Sillitin Z 86 Mercapto silane Sulfur and metal oxide cured elastomers, PUR-resins, EP-resins
Aktisil PF 777(1) Sillitin Z 86 Alkyl silane Rheology control, anti-corrosive coatings, general hydrophobic
coatings, MS sealants
16 17
Product Characteristics of
Characteristics Unit MethodAktisilVM 56
AktisilVM 56/89
AktisilMAM
AktisilMAM-R
AktisilEM
AktisilAM
AktisilMM
AktisilPF 777
Brightness Y
Brightness Z
DIN 53 163/measuring
geometry d/8°
81
76
85
85
83
85
80
76
82
77
82
77
81
76
80
75
Particle size D50
D97
�m
�m
Internal test procedure
Internal test procedure
2.2
10
2.0
9
4
18
4
18
2.2
10
2.2
10
2.2
10
2.2
10
Residue > 40 �m
> 200 �m
mg/kg
mg/kg
DIN ISO 787 part 18
DIN ISO 787 part 18
20
3
20
3
20
3
20
3
20
3
30
3
30
3
20
3
Volatile Matter at 105 °C % DIN ISO 787 part 2 0.8 0.8 0.2 0.2 0.5 0.2 0.7 0.3
Density
Bulk density
g/cm3
g/cm3
DIN ISO 787 part 10
DIN ISO 903-1976
2.6
0.32
2.6
0.32
2.6
0.45
2.6
0.45
2.6
0.32
2.6
0.32
2.6
0.32
2.6
0.25
Surface area
Oil absorption
m2/g
g/100 g
DIN ISO 9277
DIN ISO 787 part 5
7
45
8
45
7
45
7
45
8
45
9
45
7
45
8
35
Base material Sillitin Z 86 Z 89 V 88 V 85 Z 86 Z 86 Z 86 Z 86
The values shown in the table are to be considered as guidelines only. Material specifications and
technical data sheets for all products are part of our sales conditions and are available on our web site
www.hoffmann-mineral.com
18 19
Grades for the Application in Paint and Var nishes and Similar Appliance
Product Basis treated with Vin
yl A
ceta
te R
esin
s
(Meth
-) A
cry
lic R
esin
s
Ep
oxy
Resin
s
Poly
este
r R
esin
s
Vin
yl E
ste
r R
esin
s
Mela
min
e R
esin
s
Phenol R
esin
s
Silicone R
esin
s
Poly
ure
thane R
esin
s
Aktisil VM 56 Sillitin Z 86 Vinyl silane ● ● ● ● ●
Aktisil VM 56/89 Sillitin Z 89 Vinyl silane ● ● ● ● ●
Aktisil MAM Sillitin V 88 Methacrylic silane ● ● ● ● ●
Aktisil MAM-R Sillitin V 85 Methacrylic silane ● ● ● ● ●
Aktisil EM Sillitin Z 86 Epoxy silane ● ● ● ● ●
Aktisil AM Sillitin Z 86 Amino silane ● ● ● ● ● ● ● ●
Aktisil MM Sillitin Z 86 Mercapto silane ● ● ● ● ●
Aktisil PF 777 Sillitin Z 86 Alkyl silane ● ● ● ● ● ● ● ● ●
Technical Data Sheets and Material Specification Sheets for all above mentioned products are given on
our web sites www.hoffmann-mineral.com
20 21
Advantages in Paint and Varnish Systems
Filler properties Effect in paint and varnish systems
loose structure
small particle size
quick and good incorporation
excellent dispersibility (especially puriss products)
very little tendency towards sedimentation
no hard sediment
favorable rheological properties
matting effect
rapid drying
water vapor permeability
good pigment dispersion (spacer effect)
good edge covering
good sanding
excellent stone impact resistance
good mechanical properties
good corrosion protection
non-ground filler
low grit content
low abrasivity
very low electrical conductivity (< 100 μS) no disturbing electrolytes
good bath stability in electrophoretic applications
no buffer effect good stability in water based varnish systems
mineralogical composition (hardness) scratch resistance
abrasion resistance
chemically inert weather and chemical resistance, especially acids
similar refraction index as binder very good transparency (for clear lacquer systems)
surface treatment possible good bond filler to polymer
22 23
Primer-surfacer
Advantages:
• small particle size
• low grit content
• excellent dispersibility
• good sanding/low visibility of sanding marks
• good corrosion protection
• improved appearance of base/top coat
• excellent stone-chipping resistance (especially Aktisil AM)
• gloss (especially Aktisil AM)
Recommended products:
• Sillitin Z 86
• Sillitin Z 89
• Sillikolloid P 87
• Sillikolloid P 87 puriss
• Aktisil AM
Electro Deposition Paint
Advantages:
• small particle size
• very low electrical conductivity
• no disturbing electrolytes
• very little tendency towards sedimentation
• no hard sediment
• excellent dispersibility
• good bath stability
• good corrosion protection
• good throwing power
• good flexibility (Erichsen cupping and impact test)
Recommended products:
• Sillitin Z 86
• Sillitin Z 89
• Sillikolloid P 87
• Aktisil PF 777
Typical Applications of Neuburg Siliceous Earth in Coatings
24 25
Abrasivity According to Einlehner
Abrasivity in mg
quartz flour
mica
Sillitin Z 86 puriss
Sillikolloid P 87
Sillitin Z 86
Sillitin N 82
54
30
25
30
40
360
Powder Coatings
Advantages:
• excellent dispersibility
• low abrasivity
• good corrosion protection
• scratch resistance
• abrasion resistance
• flexibility (Erichsen cupping and impact test)
• good chemical resistance
Recommended products:
• all Sillitin grades and puriss, as well as Aktisil AM and Aktisil MM
Anti-corrosive Coating
Advantages:
• excellent dispersibility
• favorable rheological properties
• very little tendency towards sedimentation
• low abrasivity
• good weather resistance
• good corrosion protection
• good chemical resistance, especially against acids
(Aktisil AM, Aktisil PF 777)
• excellent abrasion resistance
• rapid drying
Recommended products:
• all Sillitin grades and puriss, as well as Aktisil EM,
Aktisil AM and Aktisil PF 777
26 27
UV-curing Coatings
Advantages:
• very little tendency towards sedimentation
• no hard sediment
• low abrasivity
• good weather resistance
• scratch resistance
• abrasion resistance
• very good transparency
• matting effect
• no effect on UV-curing
Recommended products:
• Sillitin V 85
• Sillitin V 88
• Sillitin Z 86
• Sillitin Z 86 puriss
• Sillitin Z 89
• Sillitin Z 89 puriss
• Aktisil VM 56
• Aktisil VM 56/89
• Aktisil MAM
• Aktisil MAM-R
Further Applications
Soft-feel paints (matting, soft-feel effects, good abrasion resistance,
good chemical resistance)
Gel coats (good pigment distribution [spacer effect], excellent
dispersion behavior, balanced rheology, low sedimentation tendency,
good flexibility, good weather resistance)
Solder resist (good edge covering, excellent dispersion behavior,
very good transparency, no effect on UV-curing)
Wood ventilation base (good breathability, fast drying)
28 29
Road marking paints (good rheology, abrasion resistance, night
visibility, fast drying, good opacity/TiO2 extension)
Facade- and dispersion paint (very little tendency towards sedi-
mentation, good abrasion resistance, good breathability and water
vapor permeability, matting effect, good pigment distribution [spacer
effect])
Floor coatings (good rheology, good working properties, good
chemical resistance, good mechanical characteristics, good abrasi-
on resistance, anti-settlement additives for other fillers)
Sports surfaces (good rheology, good working properties,
good mechanical characteristics [tear resistance], good abrasion
resistance)
2C-PUR-applications from sealants, coatings, elastomers to
tooling resins
Sealants and elastic adhesives (high tension values, good
rheology, good mechanical characteristics)
Plastic primers (good rheology [low run off tendency], very low
sedimentation tendency, low abrasivity, good adhesion)
Artist’s paints (excellent dispersion behavior, good pigment
distribution [spacer effect], fast drying)
30 31
Product Paper bag PE bag EVA bag Big BagType 1/Type 2/Type 3
in bulk
Sillitin V 85 25 kg 10 to 25 kg 10 to 20 kg � 750/850/1200 kg � 25 t
Sillitin V 88 25 kg 10 to 25 kg 10 to 20 kg � 750/850/1200 kg � 25 t
Sillitin N 82 25 kg 10 to 25 kg 10 to 20 kg � 750/850/1200 kg � 25 t
Sillitin N 85 25 kg 10 to 25 kg 10 to 20 kg � 750/850/1200 kg � 25 t
Sillitin N 87 25 kg 10 to 25 kg 10 to 20 kg � 750/850/1200 kg � 25 t
Sillitin Z 86 25 kg 10 to 25 kg 10 to 20 kg � 600/750/1000 kg � 24 t
Sillitin Z 89 25 kg 10 to 20 kg 10 to 15 kg � 550/700/900 kg � 24 t
Sillikolloid P 87 25 kg 10 to 20 kg 10 to 15 kg � 550/700/900 kg � 22 t
Sillitin puriss 25 kg – – – –
Sillikolloid P 87puriss
20 kg – – – –
Aktisil VM 56 25 kg 10 to 25 kg 10 to 20 kg � 550/700/900 kg � 24 t
Aktisil VM 56/89 25 kg 10 to 20 kg 10 to 20 kg � 550/700/900 kg –
Aktisil MAM 25 kg 10 to 25 kg 10 to 20 kg � 550/700/900 kg –
Aktisil MAM-R 25 kg 10 to 25 kg 10 to 20 kg � 550/700/900 kg –
Aktisil EM 25 kg 10 to 25 kg 10 to 20 kg � 550/700/900 kg –
Aktisil AM 25 kg 10 to 25 kg 10 to 20 kg � 550/700/900 kg –
Aktisil MM 25 kg 10 to 25 kg 10 to 20 kg � 550/700/900 kg –
Aktisil PF 777 25 kg 10 to 25 kg 10 to 20 kg � 550/700/900 kg –
Packaging
Special packaging and sizes are available on demand.