Patent ID: 6982294

Claim:
A flame retardant comprising: an aromatic group-containing organosiloxane compound having the mean composition formula R 1 m R 2 n SiO(4-m-n)/2 in which R 1 represents a univalent aliphatic hydrocarbon group containing 1 to 4 carbon atoms, R 2 represents a univalent aromatic hydrocarbon group containing 6 to 24 carbon atoms, R 1 and R 2 each may contain two or more species, and m and n are numbers satisfying the mathematical relationships 1.1≦m+n≦1.7 and 0.4≦n/m≦2.5, wherein the aromatic group-containing organosiloxane compound comprises Q unit (SiO 2 ) as an essential unit or consists of M unit (R 3 SiO 0.5 ) and T unit (RSiO 1.5 ); said compound being non-flowable at 23° C., flowable at 200° C., non-gelatable when at 200° C. and stirred for 30 minutes; and said compound having a number average molecular weight of not less than 2,000 and being dissolvable in an amount of not less than 100 g in one liter of a toluene solvent at a temperature of 23° C.