AROMATIC COPOLYESTER

PURPOSE:To obtain a thermotropic arom. copolyester melt-processable at a relatively low temp., excellent in the mechanical strengths, and useful for an electric, electronic, and automotive material by preparing a copolymer contg. residues of 4-hydroxybenzoic acid, dimethylbiphenyldicarbocylic acid,...

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Bibliographic Details
Main Authors SUZUKI MICHINORI, SHIOTANI AKINORI
Format Patent
LanguageEnglish
Published 29.07.1991
Subjects
ADHESIVES
CHEMISTRY
COMPOSITIONS BASED THEREON
DYES
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
ORGANIC MACROMOLECULAR COMPOUNDS
PAINTS
POLISHES
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:PURPOSE:To obtain a thermotropic arom. copolyester melt-processable at a relatively low temp., excellent in the mechanical strengths, and useful for an electric, electronic, and automotive material by preparing a copolymer contg. residues of 4-hydroxybenzoic acid, dimethylbiphenyldicarbocylic acid, and hydroquinone as the structural units. CONSTITUTION:An arom. copolyester melt-processable at 250-300 deg.C comprises a liq. crystal polymer composed of 4-hydroxybenzoic acid residues of formula I (A), 3,3'-dimethylbiphenyl-4,4'-dicarboxylic acid residues of formula II (B), and hydroquinon deriv. residues of formula III (wherein R is H, 1-8C alkyl, aryl, or halogen) (C) as the structural units, with the ratio of A to (A+B+C) of 1-90mol%, pref. 1-80mol%, still pref. 1-70mol%.
Bibliography:Application Number: JP19900110153