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US 8,618,235 B2Granted
Silicone composition
AssigneeSika Technology AG
InventorsUwe Bankwitz, Boris Kranjcevic, Alexander Djurdjevic, Davide Bianchi
Life of this patent
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Abstract
The present invention relates to silicone compositions which comprise at least one ketoximosilane-terminated polydiorganosiloxane and also at least one alkoxysilane. These compositions are neutrally crosslinking and combine a low odor with high adhesion and good storage stability.
Claims21
A silicone composition comprising
- (a) at least one ketoximosilane-terminated polydiorganosiloxane of the general formula (I)
- where
- R1 and R1′ independently are each an unsubstituted or substituted alkyl, alkenyl, or aryl radical,
- R2 independently at each occurrence is an unsubstituted or substituted alkyl, alkenyl, or aryl radical,
- R3 and R4 are each an alkyl radical,
- n stands for values from 20 to 3000, and
- m is either 0 or 1;
- (b) at least one alkoxysilane of the general formula (II)
- (R5)pSi(OR6)4-p (II)
- where
- R5 independently at each occurrence is an unsubstituted alkyl radical, alkenyl radical, aryl radical, or a radical of the formula —(R7—O)q—R8,
- where R7 is alkylene, R8 is an alkyl radical, and q stands for a value between 1 and 5,
- R6 independently at each occurrence is H or is an alkyl radical, and
- p is either 0 or 1;
- (c) at least one trialkylsilyl-terminated polydialkylsiloxane as a plasticizer;
- and
- (d) at least one catalyst;
- wherein
- the at least one catalyst includes an organotin compound;
- the silicone composition comprises less than 1% free ketoximosilanes, and
- the ketoximosilane-terminated polydiorganosiloxane is present in an amount of from about 25% to about 99% by weight of the silicone composition.
18 more elements
A silicone composition comprising
- (a) at least one ketoximosilane-terminated polydiorganosiloxane of the general formula (I)
- where
- R1 and R1′ independently are each an unsubstituted or substituted alkyl, alkenyl, or aryl radical,
- R2 independently at each occurrence is an unsubstituted or substituted alkyl or alkenyl radical,
- R3 and R4 are each an alkyl radical,
- n stands for values from 20 to 3000, and
- m is either 0 or 1;
- (b) at least one alkoxysilane of the general formula (II)
- (R5)pSi(OR6)4-p (II)
- where
- R5 independently at each occurrence is an unsubstituted alkyl radical, alkenyl radical, aryl radical, or a radical of the formula —(R7—O)q—R8,
- where R7 is alkylene, R8 is an alkyl radical, and q stands for a value between 1 and 5,
- R6 independently at each occurrence is H or is an alkyl radical, and
- p is either 0 or 1;
- (c) at least one trialkylsilyl-terminated polydialkylsiloxane as a plasticizer;
- and
- (d) at least one catalyst;
- wherein the at least one catalyst includes an organotin compound;
- and the ketoximosilane-terminated polydiorganosiloxane is present in an amount of from about 25% to about 99% by weight of the silicone composition.
16 more elements
Dependencies are inferred from the claim text.