Two stage process for the production of aromatic polyester-carbo

Details Two stage process for the production of aromatic polyester-carbo Two stage process for the production of aromatic polyester-carbo

1984-12-10

1986-07-15

Anderson, Harold D.

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

Synthetic resins

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

525462, 528176, 528179, 528182, C08G 6364

Patent

active

046007539

ABSTRACT:
The invention relates to a process for the preparation of aromatic polyester-carbonates wherein, in a first stage, aromatic oligo-esters or oligo-ester-carbonates having hydroxyl end groups are prepared from diaryl esters of aromatic dicarboxylic acids (or their starting materials) and diphenols and, optionally, a diaryl carbonate, by trans-esterification in the melt, and in a second stage these oligo-esters or oligo-ester-carbonates are condensed with phosgene by the phase boundary process to give the polyester-carbonate.

REFERENCES:
patent: 4238596 (1980-12-01), Quinn
patent: 4252939 (1981-02-01), Mori et al.
patent: 4388455 (1983-06-01), Bales

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