Patent ID: 9034993
Filing Date: 2015-05-19
Classification: C08G,C08K,C08L,C09J

Abstract:
1. A room temperature-curable polyorganosiloxane composition comprising: (A) a base composition including: (a1) polyorganosiloxane having a hydroxyl group or an alkoxy group at a molecular end; and (a2) an inorganic filler; and (B) a cross-linking agent composition including: (b1) an organosilicon compound having, in one molecule, three hydrolyzable groups or more combined with silicon atoms, or a partial hydrolysate of the organosilicon compound; (b2) polyorganosiloxane having an alkoxy group at a molecular end and represented by a general formula: where R 1 's represent alkyl groups or alkoxyalkyl groups that are identical or different, and R 2 's and R 3 's both represent unsubstituted or halogen- or cyano group-substituted univalent hydrocarbon groups that are identical or different, Y represents an oxygen atom or an unsubstituted bivalent hydrocarbon group, a is 0 or 1, b is 0 or 1, and n is an integer of 1 to 30; and (b3) a curing catalyst including an organic compound containing a nitrogen atom, wherein the base composition (A) contains the inorganic filler (a2) at a ratio of 1 to 500 parts by mass to 100 parts by mass of the component (a1), and the cross-linking agent composition (B) is compounded so that, to 100 parts by mass of the component (a1), the component (b2) is 0.5 to 20 parts by mass and the curing catalyst (b3) is 0.01 to 10 parts by mass, and the number of the alkoxy groups of the component (b1) per one piece of the hydroxyl group or the alkoxy group of the component (a1) is 2 to 20.