PARTICULATE POLYORGANOSILOXANE COMPOUND FLAME RETARDER AND FLAME-RETARDANT RESIN COMPOSITION

摘要

Provided are a flame retarder which does not substantially contain a certain atom such as a halogen, phosphorus and nitrogen, and can stably exhibit a high flame retardant effect under a wide variety of molding conditions; and a flame retardant resin composition comprising the flame retarder to impart a flame retardancy to the composition. A flame retarder characterized by comprising a polyorganosiloxane compound which has a structure composed of an R<SUB>2</SUB>SiO<SUB>2/2 </SUB>unit (wherein R represents an organic group capable of bonding to Si, and plural R's may be the same as or different from one another) and an SiO<SUB>4/2</SUB> unit, which has the molar ratio of R<SUB>2</SUB>SiO<SUB>2/2 </SUB>unit/SiO<SUB>4/2</SUB> unit falling within the range of 0.2 to 1.95, and which has been synthesized in an aqueous system using an emulsifying agent into the form of particles having a volume average particle diameter of 0.01 to 5 µm; and a flame retardant resin composition comprising the flame retarder.