Patent ID: 8357738

Claim:
A flame retardant polymer composition comprising: (a) a polystyrene resin, and (b) between about 5 and about 25 wt % based on the weight of the polymer composition of a flame retardant blend comprising halogenated non-polymeric phenyl ethers of general formula (I): wherein X is Br, each m is independently an integer of 1 to 5, each p is independently an integer of 1 to 4, and n is an integer of 1 to 5, wherein said flame retardant blend comprises at least a first, second, and third ether of general formula (I) wherein the value of n for the first ether is 1, the value of n for the second ether is 2, the value of n for the third ether is 3, and at least one non-terminal phenyl group of the first, second, and third ether of general formula (I) is connected to two phenoxy groups in the 1,4-positions, wherein the blend comprises about 30 wt % to about 60 wt % of said first ether, about 30 wt % to about 60 wt % of said second ether, and about 1 wt % to about 15 wt % of said third ether, wherein the halogen content of each halogenated non-polymeric phenyl ether is in the range of about 65 to about 80 wt % of the ether.