Crosslinkable polyorganosiloxane compositions

摘要

Crosslinkable polyorganosiloxane mass (A) comprises polyorganosiloxane (a), which exhibit groups with aliphatic carbon-carbon-multiple bonds; polyorganosiloxane (b) with silicon-bound hydrogen atoms or in place of (a) and (b); polyorganosiloxane (c), which exhibit silicon-carbon bound groups with aliphatic carbon-carbon-multiple bonds and silicon-bound hydrogen atoms; and platinum catalyst (d) and silane and siloxane containing units (e). Crosslinkable polyorganosiloxane mass (A) comprises polyorganosiloxane (a), which exhibit groups with aliphatic carbon-carbon-multiple bonds; polyorganosiloxane (b) with silicon-bound hydrogen atoms or in place of (a) and (b); polyorganosiloxane (c), which exhibit silicon-carbon bound groups with aliphatic carbon-carbon-multiple bonds and silicon-bound hydrogen atoms; and platinum catalyst (d) of formulae (I-VI) and silane and siloxane containing units (e) of formulae (VII-IX). R 1>optionally substituted diene (which is connected by at least a n-bonding with platinum) or 4-18C chains, bicyclic or cyclic ring with 6-28C; e, f : 0-3; U : O, NR 2>, N-C(=O)-N(H)R 2>; W 1>NR 7>, C(R 3>)-CO 2R 3>, C(R 3>)-C(=Z)-R 3>, S, O or C(R 3>) 2; X : NR 2>, C(R 3>)-CO 2R 3>, C(R 3>)-C(=Z)-R 3>, S, O or C(R 3>) 2; Y 1>NR 2>, C(R 3>)-CO 2R 3>C(R 3>)-C(=Z)-R 3>, S, O or C(R 3>)-CN; Z : O, S, Se, NR 2>or CR 4>2; R 2>H or optionally substituted univalent 1-24C hydrocarbon contains heteroatoms in the chains or cycles; R 3>H or optionally substituted univalent 1-28C hydrocarbon; R 4>H or optionally substituted univalent 1-24C hydrocarbon (with the standard that at least a group is -CN, -CO 2R 3>, -C(=O)-R 3>, -NO 2, -C(=O)-H or halo); R 5>optionally substituted bivalent, 1-26C hydrocarbon; and R 6>, R 7>optionally substituted univalent 1-20C hydrocarbon. Provided that e+f for silane is 4 and for siloxane is 0-3 and that per molecule contains at least a unit with an unequally 0. Independent claims are also included for: (1) the preparation of (A); (2) silicone elastomers obtained by cross-linking (A); (3) preparation of silicone elastomers comprising crosslinking (A) by the influence of heat or radiation; (4) platinum catalyst comprising silane and siloxane containing units (e); and (5) preparation of platinum catalyst comprising adding dichloro-(cycloocta-1,5-diene)platinum(II) (CODPtCl 2), to appropriate ligand and silver oxide in a solvent; converting the reaction mixture under heat supply; and removing the silver mixture, after cooling. [Image] [Image] [Image].