Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1981-02-17
1982-08-31
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528274, C08G 6362
Patent
active
043473512
ABSTRACT:
Linear polyesters are produced by esterification of aromatic dicarboxylic acids with cyclic alkylene carbonates in the presence of organic compounds containing at least one six-membered aromatic nitrogen-containing heterocyclic moiety followed by polycondensation of the resulting low molecular weight ester.
REFERENCES:
patent: 3215731 (1965-11-01), Bearden et al.
patent: 3549692 (1970-12-01), Bockmann et al.
patent: 4079045 (1978-03-01), Lazarus et al.
Deline Douglas N.
The Dow Chemical Company
Welsh Maurice J.
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