GB882049A - Improvements in and relating to polycarbonates - Google Patents

Improvements in and relating to polycarbonates

Info

Publication number
GB882049A
GB882049A GB40888/59A GB4088859A GB882049A GB 882049 A GB882049 A GB 882049A GB 40888/59 A GB40888/59 A GB 40888/59A GB 4088859 A GB4088859 A GB 4088859A GB 882049 A GB882049 A GB 882049A
Authority
GB
United Kingdom
Prior art keywords
acid
added
sodium
potassium
dihydroxydiphenyl
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
GB40888/59A
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.)
Union Carbide Corp
Original Assignee
Union Carbide Corp
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 Union Carbide Corp filed Critical Union Carbide Corp
Publication of GB882049A publication Critical patent/GB882049A/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
    • C08G64/04—Aromatic polycarbonates
    • C08G64/06—Aromatic polycarbonates not containing aliphatic unsaturation
    • 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
    • C08G64/22—General preparatory processes using carbonyl halides
    • C08G64/24—General preparatory processes using carbonyl halides and phenols

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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Copolycarbonates, free from a tendency to crystallize, are made by adding phosgene and resorcinol or hydroquinone to a solution of a (4,41-dihydroxydiphenyl)-alkane in an inert solvent and reacting the substances in the presence of an acid-binding agent; the fraction of the total amount of the phosgene which has been added at any given time during the addition being approximately the same as the fraction of the total amount of the resorcinol or hydroquinone which has been added. Preferably reaction is effected in the presence of an antioxidant (e.g. sodium hydrosulphite, potassium sulphite or sodium- or potassium sulphide). The inert solvent may be benzene, toluene, xylene, cyclohexane, methylcylohexane, chloroform, carbon tetrachloride, methyl acetate or methylene chloride and the acid-binding agent may be pyridine or an aqueous solution of lithium-, sodium-, potassium- or calcium hydroxide. At the end of the addition, a quaternary ammonium compound is added and the reaction mixture stirred to effect further polymerization. Then the polymer solution is washed with water, neutralized with acid, rewashed with water, coagulated with ethanol and finally filtered and dried. In examples, the (4,41-dihydroxydiphenyl)-alkane used is bisphenol-A. Specification 772,627 is referred to.
GB40888/59A 1958-12-03 1959-12-02 Improvements in and relating to polycarbonates Expired GB882049A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US882049XA 1958-12-03 1958-12-03

Publications (1)

Publication Number Publication Date
GB882049A true GB882049A (en) 1961-11-08

Family

ID=22209987

Family Applications (1)

Application Number Title Priority Date Filing Date
GB40888/59A Expired GB882049A (en) 1958-12-03 1959-12-02 Improvements in and relating to polycarbonates

Country Status (2)

Country Link
FR (1) FR1245111A (en)
GB (1) GB882049A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2520861A1 (en) * 1974-05-31 1975-12-11 Gen Electric IMPROVED PROCESS FOR THE MANUFACTURING OF POLYCARBONATES
EP0012203A1 (en) * 1978-11-30 1980-06-25 Allied Corporation Polycarbonates with improved age-resisting properties
US4374973A (en) 1978-11-30 1983-02-22 Allied Corporation Polycarbonates with suppressed aging characteristics

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2520861A1 (en) * 1974-05-31 1975-12-11 Gen Electric IMPROVED PROCESS FOR THE MANUFACTURING OF POLYCARBONATES
EP0012203A1 (en) * 1978-11-30 1980-06-25 Allied Corporation Polycarbonates with improved age-resisting properties
US4374973A (en) 1978-11-30 1983-02-22 Allied Corporation Polycarbonates with suppressed aging characteristics

Also Published As

Publication number Publication date
FR1245111A (en) 1960-11-04

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