Patent ID: 8470916

Claim:
A thermoplastic polymer composition suitable for melt pinning comprising a thermoplastic polymer selected from the group consisting of a polyester, a polysulfone, a polyimide and a polyamide, a polyolefin, a polyacrylate, a polyetheretherketone, ABS, a polyurethane, a polystyrene, a polycarbonate, a polyphenylene oxide, an unsaturated polyester resin, a phenolic resin, and a halogen-free flame retardant, wherein the polymer composition has a total phosphorous content of between about 0.1 and 5% by weight, wherein the halogen-free flame retardant is a phosphoric polyester formed by polycondensation of a phosphoric monomer with an esterifying monomer, wherein the phosphoric monomer is an addition reaction product of at least one of 9,10-dihydro-9-oxa-10-phospha-phenanthrene-10-oxide (DOPO) and a ring-substituted DOPO derivative to unsaturated compounds selected from the group of a monovalent and a polyvalent carboxylic acid and an anhydride thereof, and wherein the esterifying monomer is selected from the group consisting of a monovalent alcohol, a polyvalent alcohol and a mixture thereof, wherein the phosphoric polyester has an average molecular weight Mn of more than 20,000 and an average degree of polymerization Pn of at least 55.