GB676372A - Improvements in or relating to copolyesters and their use for electrical insulation - Google Patents

Improvements in or relating to copolyesters and their use for electrical insulation

Info

Publication number
GB676372A
GB676372A GB18711/49A GB1871149A GB676372A GB 676372 A GB676372 A GB 676372A GB 18711/49 A GB18711/49 A GB 18711/49A GB 1871149 A GB1871149 A GB 1871149A GB 676372 A GB676372 A GB 676372A
Authority
GB
United Kingdom
Prior art keywords
copolyester
solvent
acid
copolyesters
heated
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
GB18711/49A
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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
Priority to BE497002D priority Critical patent/BE497002A/xx
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB18711/49A priority patent/GB676372A/en
Priority to US17323850 priority patent/US2683100A/en
Priority to FR1023860D priority patent/FR1023860A/en
Publication of GB676372A publication Critical patent/GB676372A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/42—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes polyesters; polyethers; polyacetals
    • H01B3/421—Polyesters
    • H01B3/422—Linear saturated polyesters derived from dicarboxylic acids and dihydroxy compounds
    • H01B3/423—Linear aromatic polyesters
    • 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
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
    • C08G63/16—Dicarboxylic acids and dihydroxy compounds
    • C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
    • C08G63/181—Acids containing aromatic rings
    • C08G63/183—Terephthalic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/307—Other macromolecular compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Organic Insulating Materials (AREA)

Abstract

The Specification claims a copolyester of ethylene glycol, terephthalic acid and an acid of formula CnH2n(COOH)2, where n is 2-8, the copolyester having 2-4 molecular proportions of combined terephthalic acid for every molecular proportion of combined aliphatic dibasic acid. Reaction between the three ingredients is preferably continued till the copolyester has a molecular weight of 10,000 or more or alternatively a lower molecular weight copolyester may be treated with a polyisocyanate whereby the molecular weight is 10,000 or more. The copolyesters may be used as insulating coverings for conductors (see Group XXXVI) in which case they may be applied to the conductor (a) dissolved in a solvent, e.g. o-cresol, cresylic acid, xylenols, a solution of phenol in a cresol, or a mixture of phenols and tetrachloroethane or monochlorobenzene; (b) in the form of a dispersion in a non-solvent, e.g. a petroleum hydrocarbon; (c) in a latent-solvent which develops solvent properties only at elevated temperatures; or (d) from a melt, e.g. by extrusion of the melted copolyester, if desired together with a solvent. The copolyesters form compositions with polyamides, alkyds, phenol formaldehyde condensates, urea- and melamine-formaldehyde condensates which may be alkylated, polyvinyl acetals, shellac, wood flour, paper, asbestos, mica, glass and fire retardants, e.g. halo-hydrocarbons. The copolyesters may be modified by heating with lightly condensed phenol-formaldehyde condensates, dimethylol urea, hexamethylol melamine, dimethylol urea dibutyl ether, or hexamethylol melamine hexamethyl ether, if desired in presence of maleic acid, phthalic anhydride, ammonium hydrogen phosphate, styrene dichloride, a bromonaphthol or 2 : 4-dichloro-1-naphthol. The copolyester insulation may be applied directly to the surface of the conductor or over another insulating covering, e.g. polyvinyl acetal. In examples: (1) dimethyl terephthalate and ethylene glycol are heated in presence of litharge and the product heated with adipic acid. The copolyester by itself and in combination with hexamethylol melamine hexamethyl ether is dissolved in cresol and used for insulating copper; (2), (3) and (4) dimethyl terephthalate and ethylene glycol are heated in presence of litharge and the products heated respectively with sebacic, glutaric and succinic acids. The invention of Specification 650,358 is disclaimed.
GB18711/49A 1949-07-15 1949-07-15 Improvements in or relating to copolyesters and their use for electrical insulation Expired GB676372A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE497002D BE497002A (en) 1949-07-15
GB18711/49A GB676372A (en) 1949-07-15 1949-07-15 Improvements in or relating to copolyesters and their use for electrical insulation
US17323850 US2683100A (en) 1949-07-15 1950-07-11 Copolyesters and their use for electrical insulation
FR1023860D FR1023860A (en) 1949-07-15 1950-07-13 Improvements relating to copolyesters and their application to electrical insulation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1023860X 1949-07-15
GB18711/49A GB676372A (en) 1949-07-15 1949-07-15 Improvements in or relating to copolyesters and their use for electrical insulation

Publications (1)

Publication Number Publication Date
GB676372A true GB676372A (en) 1952-07-23

Family

ID=26253560

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18711/49A Expired GB676372A (en) 1949-07-15 1949-07-15 Improvements in or relating to copolyesters and their use for electrical insulation

Country Status (1)

Country Link
GB (1) GB676372A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3442868A (en) * 1965-07-20 1969-05-06 Teijin Ltd Novel process for the preparation of polyester
US3497473A (en) * 1966-11-29 1970-02-24 American Enka Corp Process for the preparation of polyethylene terephthalate
DE1807776A1 (en) * 1968-11-08 1970-05-27 Dynamit Nobel Ag Production of boil-proof, sterilizable and highly deformable lacquer films
DE19754327A1 (en) * 1997-12-08 1999-06-10 Herberts Gmbh Powder coating compositions suitable for weather-resistant coatings
EP1343052A2 (en) * 2002-03-05 2003-09-10 Fujitsu Limited A resist pattern-improving material and a method for preparing a resist pattern by using the same

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3442868A (en) * 1965-07-20 1969-05-06 Teijin Ltd Novel process for the preparation of polyester
US3497473A (en) * 1966-11-29 1970-02-24 American Enka Corp Process for the preparation of polyethylene terephthalate
DE1807776A1 (en) * 1968-11-08 1970-05-27 Dynamit Nobel Ag Production of boil-proof, sterilizable and highly deformable lacquer films
DE19754327A1 (en) * 1997-12-08 1999-06-10 Herberts Gmbh Powder coating compositions suitable for weather-resistant coatings
EP1343052A2 (en) * 2002-03-05 2003-09-10 Fujitsu Limited A resist pattern-improving material and a method for preparing a resist pattern by using the same
EP1343052A3 (en) * 2002-03-05 2003-11-19 Fujitsu Limited A resist pattern-improving material and a method for preparing a resist pattern by using the same
US7416837B2 (en) 2002-03-05 2008-08-26 Fujitsu Limited Resist pattern-improving material and a method for preparing a resist pattern by using the same
CN1442752B (en) * 2002-03-05 2012-10-03 富士通株式会社 Anticorrosion image improved material

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