Process for producing grafted polycarbonate resin

Details Process for producing grafted polycarbonate resin Process for producing grafted polycarbonate resin

1993-07-15

1995-06-20

Buttner, David

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525467, C08F28302, C08L 6900

Patent

active

054261597

ABSTRACT:
Disclosed is a process for producing a grafted polycarbonate resin for optical use, which comprises adding to an aqueous suspension of an aromatic polycarbonate resin having radical-polymerizable unsaturated terminal group on a molecule wherein the aromatic polycarbonate resin has an average particle diameter of 0.1 to 5 mm and an apparent density of 0.2 to 0.9 g/cm.sup.3, a vinyl monomer and a radical-polymerization initiator, heating the aqueous suspension at a lower temperature by 5.degree. C. to 20.degree. C. than the decomposition temperature for a half-life period of 10 hours of the radical-polymerization initiator, thereby impregnating the polycarbonate resin with the vinyl monomer and the radical-polymerization initiator, then elevating the temperature to the range of from a lower temperature by 50.degree. C. to a higher temperature by 30.degree. C. than the decomposition temperature for a half-life period of 10 hours of the radical-polymerization initiator, thereby conducting a graft-polymerization reaction to obtain 90% by weight or more of conversion of vinyl monomer.

REFERENCES:
patent: 3692870 (1972-09-01), Schnell et al.
patent: 4310642 (1982-01-01), Margotte et al.
patent: 4888401 (1993-12-01), Kawaki et al.
Chemical Abstract 92(6):42814y.
Chemical Abstract 89(6):44656k.
Chemical Abstracts, vol. 92, No. 6, 1980, Columbus, Ohio US; Abstract No. 42814Y, Kakizaki et al.; "Improved Blending of Polycarbonate With Polystyrene", p. 31, column 2; & JP-A-54117555 (Mitsubishi Petrochemical Co.) Dec. 9, 1979.

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