Silanised silicas
AssigneeDegussa AG
InventorsJurgen Meyer, Mario Scholz
Life of this patent
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Abstract
Silanised, structurally modified silicas, characterised by vinyl groups or vinyl silyl groups fixed to the surface, hydrophobic groups such as trimethyl silyl and/or dimethyl silyl and/or monomethyl silyl additionally being fixed to the surface, having the following physico-chemical properties: BET surface area m2/g: 25-400 Average primary particle size nm: 5-50 pH: 3-10 Carbon bon content %: 0.1-10 DBP value %: <200 or not determinable are produced by treating silica with a surface-modifying agent, heat treating and then structurally modifying the mixture obtained. The silica can be used as a filler in silicone rubber.
Claims8
Silanised, structurally modified silicas, characterised by vinyl groups or vinyl silyl groups fixed to the surface, hydrophobic groups such as trimethyl silyl and/or dimethyl silyl and/or monomethyl silyl additionally being fixed to the surface, having the following physico-chemical properties:
- BET surface area m2/g:
- 25-400
- Average primary
- 5-50
- particle size nm:
- pH:
- 3-10
- Carbon content %:
- 0.1-10
- DBP value %:
- <200 or not determinable
Dependencies are inferred from the claim text.