Patent ID: 8455561

Claim:
A process for producing silicone-based foams made of silicone-containing polymer blends (A), comprising forming a polymer network by using: (i) at least one compound (V) which contributes to the forming of the polymer network and which bears at least one alkoxysilyl group of the general formulae [1a], [1b], or [1c] ≡Si—O—C(R 1 )(R 2 )(R 3 ) [1a], ═Si(R 5 )—O—C(R 1 )(R 2 )(R 3 ) [1b], ≡Si—O—C(O)—U [1c], and from which at least one molecule (XY) is eliminated during curing of the polymer blends (A), where the at least one molecule (XY) is gaseous during processing, causes foaming in the polymer blends (A), and is at least one unsaturated organic compound of the general formula [73a] (R 10 )(R 11 )C═C(R 12 )(R 13 ) [73a], and (ii) a catalyst (K) which is a member selected from the group consisting of a Bronsted acid, a Bronsted base, a Lewis acid, and a Lewis base, where moieties R 1 -R 5 have the following definitions R 1 , R 2 , and R 3 are hydrogen, a halogen, or a moiety bonded by way of a carbon atom, where the moieties R 1 , R 2 , and R 3 can have bonding to one another, or are a divalent moiety which has bonding by way of a carbon atom and which connects two alkoxysilyl groups of the general formula [1a], [1b], or [1c], with the proviso that at most 2 of the moieties R 1 , R 2 , and R 3 are hydrogen, and alkoxysilyl moieties of the formula ≡Si—O—CH 2 —R 4 are excluded, R 4 is an unbranched aliphatic hydrocarbon moiety having from 1 to 12 carbon atoms, R 5 is hydrogen, a halogen, an unsubstituted or substituted aliphatic, olefinic, or aromatic hydrocarbon moiety having from 1 to 12 carbon atoms, an OH group, an —OR 6 group, an —OC(O)R 6 group, an —OC(O)OR 6 group, an —OC(O)OM group, a metaloxy moiety M-O—, or CH 2 —W, where W is a heteroatom, the free valencies of which have been satisfied by hydrocarbon moieties, U is an —OR 6 group, or an —NR 6a R 6b group, R 6 , R 6a , and R 6b are hydrogen, or an unsubstituted or substituted aliphatic, olefinic, or aromatic hydrocarbon moiety having from 1 to 12 carbon atoms, R 10 , R 11 , R 12 and R 13 are hydrogen, a halogen, or a moiety bonded by way of a carbon atom, where the moieties R 10 , R 11 , R 12 and R 13 can have bonding to one another, with the proviso that at most two of moieties R 10 , R 11 , R 12 and R 13 are hydrogen, and M is a metal atom which can have free valencies which have been saturated by ligands, where polymer blends (A) which form SiO 2 during the crosslinking process are excluded.