Process for the reduction of carboxyl-end groups of linear polye

Details Process for the reduction of carboxyl-end groups of linear polye Process for the reduction of carboxyl-end groups of linear polye

1995-12-07

1996-10-08

Acquah, Samuel A.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

525439, 524115, C08K 549

Patent

active

055632092

ABSTRACT:
A process for the reduction of the carboxyl end groups of linear polyester through reaction with alkylene carbonate in the melt phase in the presence of 40 to 160 ppm of allyltriphenyl phosphonium bromide, based on the weight of the polyester.

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patent: 4348314 (1982-09-01), Lazarus et al.
patent: 4374960 (1983-02-01), Rothwell et al.
patent: 4374961 (1983-02-01), Kudo et al.
patent: 4442058 (1984-04-01), Griffith et al.
patent: 4867936 (1989-09-01), Buyalos et al.

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