Patent ID: 8889770
Filing Date: 2014-11-18
Classification: C08K,C08L,C09K

Abstract:
1. An antimony free flame retardant polymer composition comprising a) a polymer resin, selected from a polyolefin; a polycarbonate, a rubber modified polystyrene, a polyamide, a polyurethane, polyacetal, epoxy resin, a natural rubber, a synthetic rubber and blends and copolymers thereof; b) from about 1 to about 35% by weight based the weight of the antimony free flame retardant polymer composition of a mixture of brominated phenolic ether oligomers of formula I wherein R having a halogen content of from about 65 to about 83 wt %, and which mixture comprises about 30 to about 50% 3-ring oligomers, 30 to 60% 4-ring oligomers, 1 to 15% 5-ring oligomers, less than 15% total of oligomers containing 6 or more phenyl rings and about 0 to about 2% 2-ring oligomers; c) from 5 to about 85% by weight based on the weight of the antimony free flame retardant polymer composition of a polyphenylene ether of formula IIIa wherein Y is a C d) from 0 to about 10% by weight of a non-antimony flame retardant synergist or adjuvant, which flame retardant polymer composition is free of antimony compounds and iron compounds, and wherein polymer resin a) is not the same as the oligomer or polymer of c).