Patent ID: 7563843

Claim:
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): R a R 1 b SiO (4-a-b)/2 (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): R 2 d H c SiO (4-d-c)/2 (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 3 Si—) group is trimethylsilyl group, butyldimethylsilyl group, dimethylethylsilyl group, diethylmethylsilyl group, triethylsilyl group, methyldimethoxysilyl group, ethyldimethoxysilyl group, methyldiethoxysilyl group, dimethylmethoxysilyl group, or triniethoxysilyl group, and 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.