GB1040479A - Process for manufacture of polycarbonates - Google Patents

Process for manufacture of polycarbonates

Info

Publication number
GB1040479A
GB1040479A GB4953363A GB4953363A GB1040479A GB 1040479 A GB1040479 A GB 1040479A GB 4953363 A GB4953363 A GB 4953363A GB 4953363 A GB4953363 A GB 4953363A GB 1040479 A GB1040479 A GB 1040479A
Authority
GB
United Kingdom
Prior art keywords
monochloroformate
polycarbonate
ion
exchange resin
solvent
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.)
Expired
Application number
GB4953363A
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.)
Dow Chemical Co
Original Assignee
Dow Chemical Co
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
Priority claimed from US246008A external-priority patent/US3254051A/en
Application filed by Dow Chemical Co filed Critical Dow Chemical Co
Publication of GB1040479A publication Critical patent/GB1040479A/en
Expired legal-status Critical Current

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
    • C08G64/26—General preparatory processes using halocarbonates
    • C08G64/266—General preparatory processes using halocarbonates and alcohols

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polyesters Or Polycarbonates (AREA)

Abstract

In a process for the manufacture of polycarbonates by the polycondensation of a monochloroformate of a dihydric phenol in the presence of a solvent for the monochloroformate and the polycarbonate, condensation is effected in the presence of one or more of an oxide or hydroxide of magnesium or an alkaline earth metal, or an ion-exchange resin containing quarternary ammonium hydroxide groups. The ion-exchange resin is preferably based on a copolymer of an aromatic monovinyl hydrocarbon and an aromatic divinyl hydrocarbon. In a preferred process, a solution of the monochloroformate of the dihydric phenol in a water-immiscible organic solvent which is also a solvent for the polycarbonate is reacted with an aqueous suspension of the oxide or hydroxide of magnesium or an alkaline earth metal or of the ion-exchange resin, possibly in the presence of a catalyst, e.g. benzyltrimethylammonium chloride. Examples describe the production of the polycarbonate of bisphenol A.
GB4953363A 1962-12-20 1963-12-16 Process for manufacture of polycarbonates Expired GB1040479A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US246008A US3254051A (en) 1962-12-20 1962-12-20 Process of preparing polycarbonates by contacting a monochloroformate with an insoluble crosslinked copolymer containing quaternary ammonium groups
US24821362A 1962-12-31 1962-12-31

Publications (1)

Publication Number Publication Date
GB1040479A true GB1040479A (en) 1966-08-24

Family

ID=26937642

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4953363A Expired GB1040479A (en) 1962-12-20 1963-12-16 Process for manufacture of polycarbonates

Country Status (2)

Country Link
DE (1) DE1495483A1 (en)
GB (1) GB1040479A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0456052A2 (en) * 1990-05-07 1991-11-13 General Electric Company A method for making end-capped polycarbonates from bisphenol monochloroformate polycarbonate oligomers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0456052A2 (en) * 1990-05-07 1991-11-13 General Electric Company A method for making end-capped polycarbonates from bisphenol monochloroformate polycarbonate oligomers
EP0456052A3 (en) * 1990-05-07 1992-06-03 General Electric Company A method for making end-capped polycarbonates from bisphenol monochloroformate polycarbonate oligomers

Also Published As

Publication number Publication date
DE1495483A1 (en) 1969-03-27

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