End capped polyalkylene carbonates having improved thermal stabl

Details End capped polyalkylene carbonates having improved thermal stabl End capped polyalkylene carbonates having improved thermal stabl

1977-05-05

1978-08-01

Pertilla, Theodore E.

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

Synthetic resins

From reactant having a halogen atom or oxygen single bonded...

260463, 528372, C08G 6362

Patent

active

041042646

ABSTRACT:
Polycarbonates, of the type formed by reacting an aliphatic or cycloaliphatic 1,2-monoepoxide with carbon dioxide and having substantially alternating units of epoxide and carbon dioxide, are improved in thermal stability by reacting the free hydroxyl groups thereon with a hydroxyl reactive sulfur compound.
The resulting end capped polycarbonates are useful for producing molded products, films, and packages which are resistant to thermal degradation.

REFERENCES:
patent: 3177179 (1965-04-01), Lee et al.

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