Patent ID: 7563843
Filing Date: 2009-07-21
Classification: C08G,C08K,C08L

Abstract:
1. A flame retardant silicone composition comprising, in admixture: (A) 100 parts by weight of an organopolysiloxane containing at least two alkenyl groups having 2 to 6 carbon atoms in a molecule, and having a viscosity of 50 to 100,000 centistokes at 25° C., represented by the following general formula (1): wherein R is an alkenyl group having 2 to 6 carbon atoms, R 1 is an unsubstituted monovalent hydrocarbon group free of aliphatic unsaturation, “a” is a positive number of 0.0001 to 0.2, “b” is a positive number of 1.7 to 2.2, and the sum of a+b is 1.9 to 2.4; (B) 0.1 to 30 parts by weight of an organohydrogenpolysiloxane containing at least two hydrogen atoms directly bonded to silicon atoms in a molecule, and being of the following average compositional formula (2): wherein R 2 is an aliphatic unsaturation-free, unsubstituted monovalent hydrocarbon group, the letter “d” is a positive number of 0.7 to 2.1, the letter “c” is a positive number of 0.001 to 1.0, and the sum of d+c is 0.8 to 3.0; (C) platinum or a platinum compound in an amount to give 0.1 to 1,000 ppm of platinum element based on the weight of the entire composition; and (D) 0.1 to 10 parts by weight of a compound derived from an amino compound having a secondary amino group directly bonded to a phenyl group, by silylating the secondary amino group, said amino compound being selected from the group consisting of benzotriazole, phenoxazine, N-allylaniline and, 2-phenylindole, the silylated secondary amino group having the following general formula: wherein, the triorganosilyl (R wherein the cured product of said composition does not have a hardness of 5 or less by Durometer Type A, and has a flame retardance to the level of UL-94 V-0.