Phosphorus-containing polyesters

Abstract

Abstract PHOSPHOROUS-CONTAINING POLYESTER MOLDING RESIN COMPOSITIONS HAVING IMPROVED FLAME RETARDANT PROPERTIES WHEREIN SAID POLYESTER COMPOSITIONS COMPRISE MELT BLENDS OF A REINFORCING AGENT, A SYNTHETIC LINEAR POLYPROPYLENE TEREPHTHALATE OR POLYBUTYLENE TEREPHTHALATE, AND UP TO ABOUT 30 PERCENT, BASED ON THE WEIGHT OF POLYESTER, OF A POLYPHOSPHONATE OR POLY(PHOSPHONATE-PHOSPHATE) HAVING A THE FOLLOWING GENERAL FORMULA. R1-((-P(=O)(-R)-O-AR1-Z1-)Q-(-P(=O)(-OR3)-O-AR2-Z1-)R)X-Z2 WHEREIN R1 IS A MONOVALENT RADICAL HAVING UP TO ABOUT 20 CARBON ATOMS SELECTED FROM THE GROUP CONSISTING OF ALKOXY, ARYLOXY, HYDROXY, HALOALKOXY, HALOARYLOXY, HYDROXYALKOXY, AND HYDROXYARYLOXY; R2 IS A MONOVALENT RADICAL HAVING UP TO 20 CARBON ATOMS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, ALKYL, ARYL, HALOALKYL, AND HALOARYL; R3 IS A MONOVALENT RADICAL HAVING UP TO 20 CARBON ATOMS SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARYL, HALOALKYL AND HALOARYL; AR1 AND AR2 ARE DIVALENT RADICALS EACH HAVING UP TO ABOUT 20 CARBON ATOMS INDEPENDENTLY SELECTED FROM THE GROUP CONSISTING OF ARYLENE AND HALOARYLENE; Z1 IS A DIVALENT RADICAL SELECTED FROM THE GROUP CONSISTING OF ALKYLENE, ARYLENE, HALOALKYLENE, HALOARYLENE, OXY, THIO, AND SULFONYL, Z2 IS EITHER HYDROGEN OR -P(=O)(-R2)-R1 Q IS AN INTEGER OF AT LEAST 1; R IS 0 OR AN INTEGER OF AT LEAST 1; X IS GREATER THAN 1. THE MOST PREFERRED POLYPHOSPHONATE IS POLY(M-PHENYLENE PHENYLPHOSPHONATE). THE MOST PREFERRED COPOLYMER IS POLY(M-PHENYLENE PHENYLPHOSPHATE)Q(M-PHENYLENE PHENYLPHOSPHONATE)R) WHERE Q/R IS GREATER THAN 3.

Inventors

• 👤 S Cohen
• 👤 R Stackman

Bibliographic Details