Patent ID: 8048966

Claim:
A method for increasing the fire resistance of a thermoplastic polymer material (TM) in need thereof, said thermoplastic polymer material (TM) comprising more than 50 wt. % based on the total weight of the thermoplastic polymer material (TM), of at least one thermoplastic polymer (T) as base polymer, said method comprising blending the thermoplastic polymer (T) with less than 50%, based on the total weight of the thermoplastic polymer material (TM), of at least one fire-stabilizer additive which is a kinked rigid-rod polyarylene (P), wherein the kinked rigid-rod polyarylene (P) is a kinked rigid-rod polyphenylene, essentially all the recurring units of which consist of a mix of p-phenylene substituted by a phenylketone group with unsubstituted m-phenylene in a mole ratio p-phenylene:m-phenylene of from 45:55 to 55:45.