Method for modifying polycarbonate formation catalysts

Details Method for modifying polycarbonate formation catalysts Method for modifying polycarbonate formation catalysts

1986-04-15

1987-06-23

Garvin, Patrick P.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Organic compound containing

502150, 502154, 502152, 502155, 502162, 502164, 502167, 502170, 502171, B01J 3104, B01J 3112, B01J 3102

Patent

active

046753044

ABSTRACT:
Cyclic polycarbonate oligomers are polymerized to linear polycarbonates by contact with a polycarbonate formation catalyst which has been modified by contacting the same with at least one diaryl carbonate, preferably diphenyl carbonate. Said modification decrease the polymerization rate or introduces an induction period into the polymerization reaction.

REFERENCES:
patent: 3301824 (1967-01-01), Hostettler et al.
patent: 3386954 (1968-06-01), Schnell et al.
patent: 3657308 (1972-04-01), Kober et al.
patent: 3689454 (1972-09-01), Smith et al.

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