IT1261812B - PROCEDURE FOR THE PRODUCTION OF POLYCARBONATES. - Google Patents

PROCEDURE FOR THE PRODUCTION OF POLYCARBONATES.

Info

Publication number
IT1261812B
IT1261812B ITRM930445A ITRM930445A IT1261812B IT 1261812 B IT1261812 B IT 1261812B IT RM930445 A ITRM930445 A IT RM930445A IT RM930445 A ITRM930445 A IT RM930445A IT 1261812 B IT1261812 B IT 1261812B
Authority
IT
Italy
Prior art keywords
production
polycarbonates
procedure
oligocarbonates
biphenols
Prior art date
Application number
ITRM930445A
Other languages
Italian (it)
Inventor
Hans-Josef Buysch
Steffen Kuhling
Original Assignee
Bayer Ag
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 Bayer Ag filed Critical Bayer Ag
Publication of ITRM930445A0 publication Critical patent/ITRM930445A0/en
Publication of ITRM930445A1 publication Critical patent/ITRM930445A1/en
Application granted granted Critical
Publication of IT1261812B publication Critical patent/IT1261812B/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
    • C08G64/20—General preparatory processes
    • C08G64/30—General preparatory processes using carbonates

Abstract

Oggetto della presente invenzione è un procedimento per la produzione di policarbonati aromatici da bifenoli, diesteri, di acido carbonico ed eventualmente agenti di ramificazione mediante transesterificazione della massa fusa per formare oligocarbonati, cristallizzazione degli oligocarbonati e successiva policondensazione in fase solida in presenza di un agente di trascinamento.The object of the present invention is a process for the production of aromatic polycarbonates from biphenols, diesters, carbonic acid and possibly branching agents by transesterification of the molten mass to form oligocarbonates, crystallization of the oligocarbonates and subsequent solid phase polycondensation in the presence of an agent of dragging.

ITRM930445A 1992-07-13 1993-07-07 PROCEDURE FOR THE PRODUCTION OF POLYCARBONATES. IT1261812B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4223016A DE4223016C2 (en) 1992-07-13 1992-07-13 Process for the production of polycarbonates

Publications (3)

Publication Number Publication Date
ITRM930445A0 ITRM930445A0 (en) 1993-07-07
ITRM930445A1 ITRM930445A1 (en) 1995-01-07
IT1261812B true IT1261812B (en) 1996-06-03

Family

ID=6463098

Family Applications (1)

Application Number Title Priority Date Filing Date
ITRM930445A IT1261812B (en) 1992-07-13 1993-07-07 PROCEDURE FOR THE PRODUCTION OF POLYCARBONATES.

Country Status (4)

Country Link
BE (1) BE1007238A3 (en)
DE (1) DE4223016C2 (en)
IT (1) IT1261812B (en)
NL (1) NL194948C (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100354801B1 (en) * 1995-02-03 2003-02-17 이데미쓰세끼유가가꾸가부시끼가이샤 Method for producing polycarbonate
EP0864597B1 (en) * 1995-11-27 2002-02-06 Idemitsu Petrochemical Co., Ltd. Processes for the production of polycarbonate
US6548623B2 (en) * 2001-07-24 2003-04-15 General Electric Company Method of polycarbonate preparation
US6870025B2 (en) 2001-07-24 2005-03-22 General Electric Company Method of polycarbonate preparation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4306057A (en) * 1978-03-27 1981-12-15 General Electric Company Solvent sweeping of polycarbonates
KR920003711B1 (en) * 1987-09-28 1992-05-09 아사히가세이고오교 가부시끼가이샤 Method for producing a crystallized aromatic polycarbonate and a crystallized aromatic polycarbonate abtained there by
DE4038768A1 (en) * 1989-12-13 1991-06-20 Bayer Ag 2 Stage prodn. of aromatic polycarbonate without using phosgene - by precondensation of di:phenol and di:alkyl carbonate and further condensation of oligomer

Also Published As

Publication number Publication date
ITRM930445A0 (en) 1993-07-07
DE4223016A1 (en) 1994-01-20
ITRM930445A1 (en) 1995-01-07
NL194948B (en) 2003-04-01
NL194948C (en) 2003-08-04
BE1007238A3 (en) 1995-05-02
DE4223016C2 (en) 1998-01-22
NL9301106A (en) 1994-02-01

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19960708