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

1991-02-15

1992-07-21

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...

528196, 528198, 528370, C08G 6420

Patent

active

051323982

ABSTRACT:
Cyclic polycarbonate oligomers are polymerized to linear polycarbonates by the catalytic action of a Wittig salt prepared by the reaction of a triarylphosphine with an alkyl or acyl halide. Certain Wittig salt-forming reactants may be incorporated in the cyclic polycarbonate composition, and interreact when the composition is heated to form the active catalytic species.

REFERENCES:
patent: 4707539 (1987-11-01), Mues et al.
Grant and Hackh's Chemical Dictionary, Fifth Edition, p. 478.

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