Preparation of linear polycarbonates from cyclic oligomer compos

Details Preparation of linear polycarbonates from cyclic oligomer compos Preparation of linear polycarbonates from cyclic oligomer compos

1988-04-25

1989-08-01

Anderson, Harold D.

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

Synthetic resins

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

528370, C08G 6362

Patent

active

048534595

ABSTRACT:
Cyclic polycarbonate oligomers are converted to linear polycarbonates by the catalytic action of a chelate of a transition metal with a ketone, diester or keto ester such as acetylacetone. The metal chelates vary in catalytic action with the position of the metal in the Periodic Table.

REFERENCES:
patent: 4644053 (1987-02-01), Brunelle et al.
patent: 4740583 (1988-04-01), Brunelle et al.
CRC Handbook of Chemistry & Physics, 68th Edition (1987-1988), inside front cover.

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