Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Treating polymer containing material or treating a solid...
Patent
1991-11-21
1993-01-26
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Treating polymer containing material or treating a solid...
528196, 528480, 528501, 528502, C08G 6440
Patent
active
051823632
ABSTRACT:
Disclosed is a process for producing powder aggregate particle of high molecular weight polycarbonate resin which comprises adding a poor solvent to a solution containing 3 to 8% by weight of high molecular weight polycarbonate resin having a viscosity average molecular weight of at least 70,000 in a solvent in a ratio of the poor solvent to the solution of the polycarbonate resin of 0.2 to 0.6 by volume, continuously pouring the resulting mixture into water heated to a higher temperature than a boiling point of a solvent of the solution of the polycarbonate resin, thereby suspending the mixture in the warm water, distilling out the solvent and the poor solvent from the mixture, thereby obtaining a slurry of the polycarbonate resin and water in the following ratio by volume:
REFERENCES:
patent: 4452976 (1984-06-01), Kohyama et al.
patent: 4668768 (1987-05-01), Mendiratta et al.
Patent Abstracts of Japan, vol. 11, No. 101 (C-413)[2548], Mar. 31, 1987; & JP-A-61 250 026 (Mitsubishi Gas Chem. Co., Inc.).
Asoh Toshiaki
Hosomi Tatsuhide
Anderson Harold D.
Mitsubishi Gas Chemical Co. Inc.
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