Conversion of cyclic polycarbonate oligomers to linear polycarbo

Details Conversion of cyclic polycarbonate oligomers to linear polycarbo Conversion of cyclic polycarbonate oligomers to linear polycarbo

1992-01-27

1993-05-18

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...

528198, 528370, C08G 6420

Patent

active

052122840

ABSTRACT:
Cyclic polycarbonate oligomers are polymerized to linear polycarbonates by the action of a salt prepared by the reaction of a triarylphosphine or triaryl phosphite with an organic disulfide, preferably an aryl disulfide. The reactants which form the salt may be incorporated in the cyclic polycarbonate composition, and interreact when the composition is heated to form the active initiating species.

REFERENCES:
Krabbenhoft, U.S. patent application Ser. No. 07/656,347, filed Feb. 15, 1991.

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