Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1980-05-02
1982-01-19
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528182, 528190, 528191, C08G 6362
Patent
active
043118224
ABSTRACT:
A process for producing poly(ester carbonates) and polyesters by reacting an aromatic or cycloaliphatic dicarboxylate salt such as sodium terephthalate with phosgene in an organic solvent in the presence of a catalytic amount of a tertiary nitrogen compound such as pyridine, optionally separating the suspended by-product inorganic salt and then interfacially reacting with a bisphenol such as bisphenol A. Excess phosgene in the diacid chloride synthesis can be carried over to the polymerization if a poly(ester carbonate) is to be produced or removed if a polyester is to be produced. Certain low levels of a tertiary nitrogen compound with a pyridine nucleus in the organic solution do not interfere with the interfacial polymerization.
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Wagner et al., Synthetic Organic Chemistry, John Wiley & Sons, NY, 1953, pp. 546-557.
Cooke Robert S.
DeBona Bruce T.
Dege Gerald J.
Segal Leon
Allied Corporation
Doernberg Alan M.
Fuchs Gerhard H,.
Welsh Maurice J.
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