Flame resistant polyester from di aryl-di(hydroxyalkylene oxy)ar

Details Flame resistant polyester from di aryl-di(hydroxyalkylene oxy)ar Flame resistant polyester from di aryl-di(hydroxyalkylene oxy)ar

1990-06-06

1991-03-26

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528287, C08G 6366

Patent

active

050030299

ABSTRACT:
A flame resistant polyester produced by addition and copolymerization of a phosphorus compound represented by general formula (I) below as a diol component of the polyester in an amount of 500 ppm or more in terms of phosphorus atom content in the polyester, which polyester has alkylene terephthalate units as main repeating units and which has an intrinsic viscosity of not less than 0.5 measured at 20.degree. C. in a mixture of equal weight of phenol and tetrachloroethane: ##STR1## where E is --CH.sub.2 CH.sub.2 --, Ar is an aromatic group or an aromatic group substituted by a lower alkyl group or a halogen atom, and m and n denote, respectively, integers the sum of which is from 1 to 20.

REFERENCES:
patent: 4017462 (1977-04-01), Daigle et al.
patent: 4157436 (1979-06-01), Endo et al.
patent: 4556698 (1985-12-01), Braksmeyer

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