Stabilized polyesters and polyester urethanes containing an arom

Details Stabilized polyesters and polyester urethanes containing an arom Stabilized polyesters and polyester urethanes containing an arom

1991-03-25

1992-07-14

Michl, Paul R.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524325, 524340, 524347, 524367, 524375, C08K 529, C08K 513

Patent

active

051303604

ABSTRACT:
Polyesters and polyester urethanes are stabilized against discoloration and hydrolytic degradation by inclusion therein of an aromatic carbodiimide and either a benzohydroquinone or a naphthohydroquinone compound, and at the same time, the quantity of isocyanate eliminated from polyester urethanes is considerably reduced.

REFERENCES:
patent: 3852101 (1974-12-01), Batchelor
patent: 4064103 (1977-12-01), Cordes et al.
patent: 4952621 (1990-08-01), Bandlish

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