High molecular weight polyester flame retardant and process for

Details High molecular weight polyester flame retardant and process for High molecular weight polyester flame retardant and process for

1995-06-20

1997-09-09

Kelly, Cynthia Harris

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

Synthetic resins

Processes of preparing a desired or intentional composition...

252601, 528167, 524126, C08K 553, C09K 2100, C08G 7902

Patent

active

056658010

ABSTRACT:
The synthesis of a high-molecular weight phosphorus-containing polyester flame retardant is disclosed. A metal complex is selected as the catalyst to catalyze the addition reaction of phosphorus compounds and unsaturated dicarboxylic acids in the presence of saturated dicarboxylic acids and diols at a relatively lower temperture in one single reactor to form phosphorus-containing diacids, followed by esterification and polymerization to complete the process.

REFERENCES:
patent: 4142904 (1979-03-01), Walsh et al.
patent: 4214069 (1980-07-01), Couchoud et al.
patent: 4307221 (1981-12-01), Poisson et al.

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