Continuous manufacture of unsaturated polyesters

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Removing and recycling removed material from an ongoing...

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Details

528303, 528304, 528306, C08G 6352, C08G 6322

Patent

active

041806352

ABSTRACT:
An economical and environmentally advantageous process for the continuous manufacture of unsaturated polyesters, wherein the vapors formed during the polycondensation are purified, in a two-part distillation column, to a degree where the residual content of organic starting materials is less than 1.5 percent by weight, based on the total weight of the effluent, and the unconverted starting materials are recycled to the process.

REFERENCES:
patent: 2892813 (1959-06-01), Georgian et al.
patent: 3390135 (1968-06-01), Seiner
patent: 3911048 (1975-10-01), Vargiu et al.
patent: 4064111 (1977-12-01), Masuda et al.

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