Title:
METHOD FOR PREPARING FINE SPHERICAL POLYCARBONATE POWDERS AND METHOD FOR PREPARING HIGH MOLECULAR WEIGHT POLYCARBONATE RESIN USING SAME
Document Type and Number:
WIPO Patent Application WO/2010/076947
Kind Code:
A2
Abstract:
The present invention relates to a method for preparing fine spherical polycarbonate powders and a method for preparing a high molecular weight polycarbonate resin using the same. The method for preparing the fine spherical polycarbonate powders comprises the steps of: (A) polymerizing non-phosgene polycarbonate; (B) extruding amorphous fine spherical polycarbonate powders; (C) surface-crystallizing the amorphous fine spherical polycarbonate powders under the presence of a solvent and a dispersion medium; and (D) drying the surface-crystallized amorphous fine spherical polycarbonate powders. The method for preparing the high molecular weight polycarbonate resin enables preparation of polycarbonates with a wide range of molecular weights from low to high through solid state polymerization by continuously using fine spherical polycarbonate powders obtained from the previous step. The present invention provides a continuous and economically efficient process for commercial production by remarkably simplifying the polycarbonate crystallization step and surpasses the preparation limit of the high molecular weight polycarbonate, which is the biggest problem of conventional non-phosgene molten polymerization processes.
Inventors:
KIM, Se Hoon (1 Lucky Hana Apt, Sinseong-dong Yuseong-gu, Daejeon 305-721, 305-721, KR)
김세훈 (대전 유성구 신성동 럭키하나아파트, 305-721 Daejeon, 305-721, KR)
PARK, Sang Hyun (1 Daelim Dure Apt, Sinseong-dong Yuseong-gu, Daejeon 305-720, 305-720, KR)
김세훈 (대전 유성구 신성동 럭키하나아파트, 305-721 Daejeon, 305-721, KR)
PARK, Sang Hyun (1 Daelim Dure Apt, Sinseong-dong Yuseong-gu, Daejeon 305-720, 305-720, KR)
Application Number:
KR2009/005884
Publication Date:
July 08, 2010
Filing Date:
October 13, 2009
Export Citation:
Assignee:
HONAM PETROCHEMICAL CORPORATION. (395-67, Shindaebang-dong Dongjak-gu, Seoul 156-010, 156-010, KR)
호남석유화학 주식회사 (서울 동작구 신대방동 395-67, 156-010 Seoul, 156-010, KR)
KIM, Se Hoon (1 Lucky Hana Apt, Sinseong-dong Yuseong-gu, Daejeon 305-721, 305-721, KR)
김세훈 (대전 유성구 신성동 럭키하나아파트, 305-721 Daejeon, 305-721, KR)
호남석유화학 주식회사 (서울 동작구 신대방동 395-67, 156-010 Seoul, 156-010, KR)
KIM, Se Hoon (1 Lucky Hana Apt, Sinseong-dong Yuseong-gu, Daejeon 305-721, 305-721, KR)
김세훈 (대전 유성구 신성동 럭키하나아파트, 305-721 Daejeon, 305-721, KR)
International Classes:
C08G64/40
Attorney, Agent or Firm:
LEE, Sook Yeol (4F Dome Bldg, 1358-17Seocho-dong, Seocho-gu, Seoul 137-862, 137-862, KR)
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