Linear copolyester containing phosphorous, procedure for its pre

Details Linear copolyester containing phosphorous, procedure for its pre Linear copolyester containing phosphorous, procedure for its pre

1996-05-28

1997-02-11

Acquah, Samuel A.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

528272, 528287, 528308, 5283086, 525438, 525439, 525440, 525441, 525444, 525445, C08F 2000

Patent

active

056022123

ABSTRACT:
A linear copolyester is prepared by polycondensation of an aromatic bicarboxylic acid with an alkylene glycol and with a carboxyphosphinic acid or anhydride which produces monomeric units having the formula: ##STR1## wherein R.sub.1 is an alkylene or phenyl radical and R.sub.2 is an alkyl or phenyl radical.
This copolyester can be used as a flame-retardant additive for organic polymers.

REFERENCES:
patent: Re30783 (1981-10-01), Kleiner et al.
patent: 3941752 (1976-03-01), Kleiner et al.
patent: 4033936 (1977-07-01), Bollert et al.
patent: 5151494 (1992-09-01), Munday et al.
patent: 5180793 (1993-01-01), Vigneault et al.

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