Water-swellable thermoplastic copolyetherester elastomer

Details Water-swellable thermoplastic copolyetherester elastomer Water-swellable thermoplastic copolyetherester elastomer

1991-05-31

1992-05-26

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528298, 528300, 528301, 528302, 528308, 5283086, C08G 6320

Patent

active

051169371

ABSTRACT:
A segmented copolyetherester elastomer has soft segments formed from 60-95% poly(ethylene oxide) glycol and 40-45% of a second poly(alkylene oxide)glycol, preferably poly(tetramethylene oxide) glycol, and hard segments formed from terephthalic acid and ethylene glycol or 1,4-butane diol, the hard segments amounting to 8-20% of the elastomer weight. The elastomer can be molded into soft, elastic objects and can absorb water amounting to at least 100% of its dry weight.

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patent: 4321341 (1982-03-01), Neuberg et al.
patent: 4731407 (1988-03-01), Benim et al.

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