ORGANOPOLYSILOXANE COMPOSITION VULCANIZABLE AT ROOM TEMPERATURE INTO AN ELASTOMER, AND NOVEL CATALYSTS FOR ORGANOPOLYSILOXANE POLYCONDENSATION

摘要

Organopolysiloxane composition (I), comprises: silicone base hardened by polycondensation of silicone elastomer; and at least one catalytic system, which comprises a metal complex or a metal salt (a), where the catalytic system is prepared by dispersing (a) with at least one oil of organopolysiloxane polymer having viscosity of at least 100 mPa.s, preferably 10000 mPa.s, and crushing the mixture to obtain a homogenous mixture of catalytic system. Organopolysiloxane composition (I), comprises: silicone base hardened by polycondensation of silicone elastomer; and at least one catalytic system, which comprises a metal complex or a metal salt of formula (M(L 1>) r1(L 2>) r2(Y 1>) x) (a), where the catalytic system is prepared by dispersing (a) with at least one oil of organopolysiloxane polymer having viscosity of at least 100 mPa.s, preferably 10000 mPa.s, and crushing the mixture to obtain a homogenous mixture of catalytic system. Either M : cerium, bismuth or molybdenum; or M : scandium, ytterbium, copper, silver or bismuth; or M : molybdenum; either L 1>a ligand, which is an alcoholate anion (when r1 is >= 2); or L 1>a ligand, which is an sulfonate anion, preferably perfluoroalkylsulfonate (when r1 is >= 2); or L 1>a ligand, which is an carboxylate anion (when r1 is >= 2); either L 2>anionic ligand different from L 1>; or L 2>anionic ligand different from L 1>(when r2 is >= 2); or L 2>anionic ligand different from L 1>(when r2 is >= 2); Y 1>neutral ligand (when x is >= 2); r1 : >= 1; and r2, x : >= 0. Provided that if M is molybdenum, then (a) is in the form of solid. Independent claims are included for: (1) a bicomponent precursor system of organopolysiloxane composition vulcanizable by polycondensation of silicone elastomer, and having two parts P1 and P2 inten SPECIFIC COMPOUNDS - 16 Compounds (a) are specifically claimed e.g. [bismuth tris(trifluoromethanesulfonate)] of formula ([F 3C-S(=O)(=O)] 3Bi 3+>), [bismuth tris(ethylene glycolate monoallyl)], [scandium tris(trifluoromethanesulfonate)], [silver tris(trifluoromethanesulfonate)], and [copper tris(trifluoromethanesulfonate)].