POLYETHER SOLID-PHASE POLYMERISATION CATALYST FOR RESINS WITH LOW FORMATION OF ACETALDEHYDE Russian patent published in 2011 - IPC C08G63/85 C08G63/80 C08F4/16 C08F4/20 C08G63/02 C08G63/181 C08G63/183

Abstract RU 2428437 C2

FIELD: chemistry.

SUBSTANCE: method involves a step for polycondensation of a polyester resin in the presence of a tin compound in amount of 50-120 parts per million and an antimony compound in amount of 95-300 parts per million of the polyester resin, and a step for solid-phase polymerisation of the polyester resin for a period of time sufficient for increasing characteristic viscosity of the resin by at least 0.15 dl/g.

EFFECT: obtaining a polyester resin with low rate of generating acetaldehyde.

2 cl, 3 tbl, 1 ex

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RU 2 428 437 C2

Authors

Massi Fred L.

Kallander Duglas Dehvid

Dates

2011-09-10—Published

2007-02-09—Filed