Patent ID: 6797772
Filing Date: 2004-09-28
Classification: C08G,C08K,C08L,H01B

Abstract:
A composition comprising the product obtained by blending to homogeneity:(A) 100 parts by weight of a polyorganosiloxane containing at least two alkenyl radicals per molecule; (B) an organohydrogensiloxane containing at least two silicon-bonded hydrogen atoms in each molecule, in a quantity sufficient to provide from 0.5 to 3 silicon-bonded hydrogen atoms per alkenyl radical in ingredient (A); (C) from 50 to 2,000 parts by weight of finely divided silver particles pre-treated with an organosilicon compound selected from the group consisting of (i) silanes containing at least one alkoxy group selected from the group consisting of methyltrimethoxysilane, vinyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, dimethyldimethoxysilane, trimethylmethoxysilane, trimethylethoxysilane, tetramethoxysilane and tetraethoxysilane and (ii) organosiloxanes selected from the group consisting of: (a) a resin comprising R3SiO1/2 and SiO4/2 units, (b) a resin comprising RSiO3/2 units, (c) a resin comprising R2SiO2/2 and RSiO3/2 units, and (d) a resin comprising R2SiO2/2, RSiO3/2 and SiO4/2 units, wherein each R represents a substituted or unsubstituted monovalent hydrocarbon; (D) an amount sufficient to promote curing of said composition of a platinum catalyst; (E) up to 20 weight percent, based on the weight of component (A), of ingredient (E), an organosilicon compound containing at least one silicon-bonded alkoxy group per molecule; and (F) 0.001 to 5 weight parts, per 100 weight parts of ingredient (A), of a cure inhibitor.