Process for continuous synthesis of poly (ether-ester-amide) seq

Details Process for continuous synthesis of poly (ether-ester-amide) seq Process for continuous synthesis of poly (ether-ester-amide) seq

1978-12-28

1980-06-17

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...

525419, 528292, 528301, 528323, C08G 6948

Patent

active

042084938

ABSTRACT:
A process to synthesize poly (ether-ester-amide) sequence copolycondensates by the reaction in a molten condition between a dicarboxylic polyamide, in which the carboxylic functions are located at the chain-ends, and a polyoxyalkoylene with hydroxylated chain-ends, in the presence of a catalyst.
This reaction is performed continuously in a thin-film reaction space through which the reaction mixture passes continuously under turbulent flow conditions.
This process, which involves much shorter reaction times, produces sequence copolycondensates with better mechanical properties than corresponding substances obtained by batch processes.

REFERENCES:
patent: 2997462 (1961-08-01), Wulff et al.
patent: 3363027 (1968-01-01), Schnegg et al.
patent: 3660356 (1972-05-01), Radlmann et al.

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