Production of thermally stabilized polyester with alkylene carbo

Details Production of thermally stabilized polyester with alkylene carbo Production of thermally stabilized polyester with alkylene carbo

Filed on

1980-06-02

Date issued

1982-09-07

Examiner

Phynes, Lucille M.

Patent Class

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

SubClass

Synthetic resins

SubSubClass

Mixing of two or more solid polymers; mixing of solid...

Other Related Categories

525439, 528309, C08G 6376

Type

Patent

Status

active

Patent number

043483143

Description

ABSTRACT:
High molecular weight linear condensation polyesters are stabilized against deterioration by heat by reacting the polyester in molten form with alkylene carbonates in the presence of a catalytic amount of a compound selected from the group consisting of sodium thiocyanate and potassium thiocyanate.

REFERENCES:
patent: 2465319 (1949-03-01), Whinfield et al.
patent: 2799664 (1957-07-01), Drewitt et al.
patent: 2863854 (1958-12-01), Wilson
patent: 3050533 (1962-08-01), Munro et al.
patent: 3051212 (1962-08-01), Daniels
patent: 3427287 (1969-02-01), Pengilly
patent: 3457238 (1969-07-01), Carter
patent: 3484410 (1969-12-01), Lazarus et al.
patent: 3491066 (1970-01-01), Petropoulos
patent: 3657191 (1972-04-01), Titzmann et al.
patent: 3985705 (1976-10-01), Georgoudis

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