Production of photodegradable polyester plastics

Details Production of photodegradable polyester plastics Production of photodegradable polyester plastics

1988-09-30

1989-11-28

Kight, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528302, 528304, 5283082, 528220, 523125, C08G 6302

Patent

active

048838578

ABSTRACT:
Condensation copolymers such as polyesters are rendered photodegradable, by subjecting them to conditions under which they undergo ester interchange effectively causing polymer chain scission, in the presence of a keto carbonyl containing compound having chemical groups reactive with the condensation polymer products formed by the ester interchange. The compound reacts chemically with the polymer products to reform the high molecular weight condensation copolymer, but with the keto carbonyl groups chemically linked into the polymer chains to confer photodegradability thereon.

REFERENCES:
patent: 3878169 (1975-04-01), Guillet et al.
patent: 4042568 (1977-08-01), Guillet et al.
patent: 4145516 (1979-03-01), Guillet et al.

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