Method for production of modified polyesters

Details Method for production of modified polyesters Method for production of modified polyesters

1988-12-09

1989-07-04

Kight, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528274, 528277, 528300, 528308, 5283082, 528489, C08G 6304

Patent

active

048451860

ABSTRACT:
This invention relates to a method of producing a modified polyester having high fiber whiteness and satisfactory dyeability. In producing a polyester at least 80% of whose repeating structural units are ethylene terephthalate units, at least one specified polyalkylene glycol having a potassium and sodium content not more than 3 ppm and an average molecular weight not less than 400 is added for copolymerization. The method enables production of a polyester with a high degree of whiteness and, moreover, a polyester with excellent static-proofness and dyeability.

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patent: 4528364 (1985-07-01), Prier

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