Neuburg Siliceous Earth - Functional Fillers for Coatings - SILLITIN - SILLIKOLLOID

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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

[email protected] • 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


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



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



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



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


• good bath stability


• good throwing power

• good flexibility (Erichsen cupping and impact test)


• 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:


• low abrasivity


• scratch resistance

• abrasion resistance

• flexibility (Erichsen cupping and impact test)

• good chemical resistance


• all Sillitin grades and puriss, as well as Aktisil AM and Aktisil MM

Anti-corrosive Coating

Advantages:


• favorable rheological properties


• low abrasivity

• good weather resistance


• good chemical resistance, especially against acids

(Aktisil AM, Aktisil PF 777)

• excellent abrasion resistance

• rapid drying


• all Sillitin grades and puriss, as well as Aktisil EM,

Aktisil AM and Aktisil PF 777

26 27

UV-curing Coatings

Advantages:


• no hard sediment

• low abrasivity

• good weather resistance

• scratch resistance

• abrasion resistance

• very good transparency

• matting effect

• no effect on UV-curing


• 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 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.

Neuburg Siliceous Earth - Functional Fillers for Coatings - SILLITIN - SILLIKOLLOID

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Transcript of Neuburg Siliceous Earth - Functional Fillers for Coatings - SILLITIN - SILLIKOLLOID