JPS646020A - Production of polycarbonate for disk base - Google Patents

Production of polycarbonate for disk base

Info

Publication number
JPS646020A
JPS646020A JP62161325A JP16132587A JPS646020A JP S646020 A JPS646020 A JP S646020A JP 62161325 A JP62161325 A JP 62161325A JP 16132587 A JP16132587 A JP 16132587A JP S646020 A JPS646020 A JP S646020A
Authority
JP
Japan
Prior art keywords
solid
organic solvent
powdery polycarbonate
polycarbonate
liquid separation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP62161325A
Other languages
Japanese (ja)
Inventor
Motonobu Ezoe
Kazunari Otsubo
Koji Yamamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Idemitsu Petrochemical Co Ltd
Original Assignee
Idemitsu Petrochemical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Idemitsu Petrochemical Co Ltd filed Critical Idemitsu Petrochemical Co Ltd
Priority to JP62161325A priority Critical patent/JPS646020A/en
Priority to US07/191,604 priority patent/US4880896A/en
Priority to DE3855023T priority patent/DE3855023T2/en
Priority to EP88108453A priority patent/EP0293769B1/en
Priority to KR1019880006371A priority patent/KR950000069B1/en
Publication of JPS646020A publication Critical patent/JPS646020A/en
Pending legal-status Critical Current

Links

Landscapes

  • Compositions Of Macromolecular Compounds (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To obtain the titled polymer having high purity and quality in high efficiency, by contacting a powdery polycarbonate containing impurities with an organic solvent in a vessel provided with a solid-liquid contact zone, a solid- liquid separation mechanism and a drying mechanism, separating the organic solvent and drying the powder. CONSTITUTION:A powdery polycarbonate containing impurities such as low- molecular weight components and unreacted bisphenol A, etc., and an organic solvent (e.g. acetone) are introduced into a vessel provided with a solid-liquid contact zone, a solid-liquid separation mechanism and a drying mechanism to effect the contact of the powdery polycarbonate with the organic solvent. The powdery polycarbonate is separated from the organic solvent by the solid- liquid separation mechanism consisting of e.g. a filter plate placed near the bottom of the treating vessel. The obtained powdery polycarbonate is dried by the drying mechanism to obtain the objective polymer.
JP62161325A 1987-05-30 1987-06-30 Production of polycarbonate for disk base Pending JPS646020A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP62161325A JPS646020A (en) 1987-06-30 1987-06-30 Production of polycarbonate for disk base
US07/191,604 US4880896A (en) 1987-05-30 1988-05-09 Polycarbonate for disc substrate having low bisphenol content
DE3855023T DE3855023T2 (en) 1987-05-30 1988-05-27 Polycarbonate for plate substrates
EP88108453A EP0293769B1 (en) 1987-05-30 1988-05-27 Polycarbonate for disc substrate
KR1019880006371A KR950000069B1 (en) 1987-05-30 1988-05-30 Polycarbonate for disc substrate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62161325A JPS646020A (en) 1987-06-30 1987-06-30 Production of polycarbonate for disk base

Publications (1)

Publication Number Publication Date
JPS646020A true JPS646020A (en) 1989-01-10

Family

ID=15732945

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62161325A Pending JPS646020A (en) 1987-05-30 1987-06-30 Production of polycarbonate for disk base

Country Status (1)

Country Link
JP (1) JPS646020A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6431690A (en) * 1987-07-29 1989-02-01 Mitsubishi Gas Chemical Co Polycarbonate molding material for optical disk
EP0894816A1 (en) * 1997-07-29 1999-02-03 Mitsubishi Chemical Corporation Polycarbonate resin for substrate of optical recording medium
JPH11342510A (en) * 1998-04-03 1999-12-14 Teijin Chem Ltd Optical molding materials
WO2000018822A1 (en) * 1998-09-28 2000-04-06 Idemitsu Petrochemical Co., Ltd. Copolycarbonate and process for producing the same
EP1128086A2 (en) 2000-02-28 2001-08-29 Tokai Rubber Industries, Ltd. Vibration-damping device for vehicles
JP2001253943A (en) * 1999-12-03 2001-09-18 Teijin Ltd Aromatic polycarbonate, its production method and molded article
JP2003512944A (en) * 1999-11-03 2003-04-08 バイエル アクチェンゲゼルシャフト Granules of high-purity polymer and method for producing the same

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6431690A (en) * 1987-07-29 1989-02-01 Mitsubishi Gas Chemical Co Polycarbonate molding material for optical disk
EP0894816A1 (en) * 1997-07-29 1999-02-03 Mitsubishi Chemical Corporation Polycarbonate resin for substrate of optical recording medium
US6166167A (en) * 1997-07-29 2000-12-26 Mitsubishi Chemical Corporation Polycarbonate resin for substrate of optical recording medium
JPH11342510A (en) * 1998-04-03 1999-12-14 Teijin Chem Ltd Optical molding materials
WO2000018822A1 (en) * 1998-09-28 2000-04-06 Idemitsu Petrochemical Co., Ltd. Copolycarbonate and process for producing the same
US6476249B1 (en) 1998-09-28 2002-11-05 Idemitsu Petrochemical Co., Ltd. Copolycarbonate and process for producing the same
JP2003512944A (en) * 1999-11-03 2003-04-08 バイエル アクチェンゲゼルシャフト Granules of high-purity polymer and method for producing the same
JP2001253943A (en) * 1999-12-03 2001-09-18 Teijin Ltd Aromatic polycarbonate, its production method and molded article
EP1128086A2 (en) 2000-02-28 2001-08-29 Tokai Rubber Industries, Ltd. Vibration-damping device for vehicles

Similar Documents

Publication Publication Date Title
US4147882A (en) Organic acids and process for preparing same
EP0239091A3 (en) Particle separation process
JPS646020A (en) Production of polycarbonate for disk base
FI853690A0 (en) FOERFARANDE FOER ISOLERING OCH RENING AV PODOFYLLOTOXIN.
ES447195A1 (en) Preparation of ethylbenzene hydroperoxide
GB1085270A (en) Process for removing water from coal fines
BG60054B2 (en) Method for preparation of terephthalic acid from dimethylterephthalate as an intermediate product
JPS5696710A (en) Production of meso-carbon microbeads
ES433488A1 (en) Process for separating 1,5-dinitroanthraquinone and 1,8-dinitroanthraquinone from dinitroanthraquinone mixtures
EP0307700A3 (en) Disc concentrator
GB1015067A (en) Production of solid potassium metabisulfite
JPS5235192A (en) Process for the production of a catalyst for copolymerization
JPS56120715A (en) Preparation of filmy acetylene polymer with high strength
SU829623A1 (en) Method of purifying dimethylformamide from impurities
GB1522907A (en) Carbamates of 2- haloergolines and of 2- haloergolenes and process for the preparation thereof
EP0026244B1 (en) Preparation of a mixture of polycylic aromatic polycarboxylic acids soluble in acetone, but insoluble in water
JPS643198A (en) Refining method of interleukin-2
US4384134A (en) Process for preparing organic acids
JPS5612383A (en) Separation of tocopherol
CA1140588A (en) Process for preparing organic acids
EP0026245B1 (en) Preparation of a mixture of polycyclic aromatic polycarboxylic acids soluble in acetone and in water, and mixture obtained thereby
FR2328519A1 (en) Tubular centrifuge with at least two cyclone separators - has cylindrical outlet welded into cylindrical inlet chamber slot (SW 16.5.77)
SU1047917A1 (en) Method of producing polymeric crown-esters
JPS5212135A (en) Process for separation of 1,3,5-trialkylbenzene
SU827383A1 (en) Method of steam-gas activation of carbon-containing materials