Process for producing polycarbonate resin particles

Details Process for producing polycarbonate resin particles Process for producing polycarbonate resin particles

1984-01-05

1985-10-08

Kight, John

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

Synthetic resins

Treating polymer containing material or treating a solid...

528501, 528372, 528502, 523343, C08G 6364

Patent

active

045461724

ABSTRACT:
A process for producing polycarbonate resin particles from a methylene chloride solution of a polycarbonate resin obtained by the polycondensation of a dihydroxydiaryl compound and phosgene, which comprises continuously supplying the methylene chloride solution of the polycarbonate resin to a particle-forming vessel, heating it while maintaining it in a suspended state in water to evaporate methylene chloride and to form an aqueous slurry containing polycarbonate resin particles, subjecting at least a part of the resulting aqueous slurry withdrawn from the particle-forming vessel and containing the polycarbonate resin particles to wet pulverization treatment and recycling at least a part of the treated polycarbonate resin particles to the particle-forming vessel.

REFERENCES:
patent: 3267074 (1962-02-01), Wood
patent: 3294741 (1966-12-01), Schnell et al.
patent: 3509094 (1970-04-01), Gemassmer
patent: 3847886 (1974-11-01), Blunt
patent: 3954713 (1976-05-01), Schnoring et al.
patent: 4444978 (1984-04-01), Dick et al.
patent: 4452976 (1984-06-01), Kohyama et al.

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