Reduction of acidity of polyesters by melt reaction endcapping w

Details Reduction of acidity of polyesters by melt reaction endcapping w Reduction of acidity of polyesters by melt reaction endcapping w

1991-02-04

1993-09-07

Short, Patricia A.

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

Synthetic resins

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

525935, C08G 6391

Patent

active

052429938

ABSTRACT:
A method for the melt reaction of polyesters, particularly polyethylene terephthalate, with an alkylacetylacetonate endcapping agent which reacts with terminal carboxyl groups of the polyester to produce polyesters having reduced acidity and PET products produced by the method having reduced acid content.

REFERENCES:
patent: 3657191 (1972-04-01), Tilzmann
patent: 3959228 (1976-05-01), Massey
patent: 4351936 (1982-09-01), Matsumura
J. Bjorksten, "Polyesters and Their Applications" Reinhold Publishing Corp. N.Y. pp. 161, 163, 170, 203 (1956).

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