Silfit Z 91 in moisture-curing adhesives

STP-E / STP-U

Calcined product based on Sillitin Z 86.

Silfit Z 91 is applicable in STP-E and STP-U adhesives.
The product offers highest brightness and color neutrality, lower moisture content, lower viscosity, higher tensile and lap shear strength. Silfit Z 91 is our standard product for high-strength adhesives.

 

  • excellent strength of properties, up to 2-fold or 3-fold calcium carbonate (tensile strength and lap shear strength), mostly without reducing the ultimate elongation
  • good water resistance and chemical resistance
Product characteristics Unit SILFIT Z 91
Functionalization untreated
Color values L*
Color values a*
Color values b*
96.5
- 0.2
1.0
Particle size D50
Particle size D97
µm
2.1
9,5
Residue > 40 µm
mg/kg
10
Volatile matter at 105 °C % 0.2
Electrical conductivity µS/cm 20
pH Value 6.5
Density
Bulk density
Tamped density
g/cm³
2.6
0.30
0.55
Spec. Surface area (BET)
Oil absorption
m²/g
g/100 g
10
65
Hardness silica/kaolinite
mg
7/4.5
Refractive index n 1.55
Water solubility
Acid solubility
%
< 0.5
< 1
Chemical Analysis:
SiO2
Al2O3
Fe2O3
%
86
13
< 1
Mineralogical Composition:
Neuburg silica
Calcined kaolinite
%
60
40
Equilibrium moisture content at 25°C
and 50% relative humidity
and 80% relative humidity
and 90% relative humidity
%
0.12
0.22
0.54
Water absorption ml/g not specified

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The aspects to observe when working with our products are detailed in our Material Safety Data Sheet, which also can be downloaded.

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