LIQUID CRYSTAL POLYESTER RESIN COMPOSITION

    公开(公告)号:JPH0586266A

    公开(公告)日:1993-04-06

    申请号:JP5385392

    申请日:1992-03-12

    Abstract: PURPOSE:To obtain the subject composition useful for parts of electric and electronic devices, etc., having excellent fluidity and mechanical properties by blending a resin composition comprising a liquid crystal polyester resin forming an anisotropic melt phase, etc., with a specific amount of a specific epoxy compound. CONSTITUTION:(A) 100 pts.wt. resin composition comprising (i) 1-99wt.% & liquid crystal polyester resin forming an anisotropic melt phase and (ii) 99-1wt.% one or more thermoplastic resins selected from polyester, PC, polyarylene oxide and polyarylene sulfide is blended with (B) 0.01-20 pts.wt. (preferably 0.1-10 pts.wt.) epoxy compound containing no plural glycidyl ester groups in the molecule to give the objective composition.

    LIQUID CRYSTAL POLYESTER COMPOSITION

    公开(公告)号:JPH04348185A

    公开(公告)日:1992-12-03

    申请号:JP12055691

    申请日:1991-05-27

    Abstract: PURPOSE:To obtain the subject composition having small mechanical anisotropy such as dimensional accuracy by adding specific amounts of a specific epoxy compound and a filler to a thermotropic liquid crystal polyester. CONSTITUTION:The objective composition is produced by compounding (A) 100 pts.wt. of a thermotropic liquid crystal polyester composed of the units selected from aromatic oxycarbonyl unit, aromatic dioxy unit, aromatic dicarbonyl unit, ethylenedioxy unit, etc., with (B) 0.01-20 pts.wt. (especially preferably 0.1-10 pts.wt.) of an epoxy compound of formula and (C) 0-200 pts.wt. (preferably 10-150 pts.wt.) of a filler such as glass fiber, wollastonite and alumina.

    LIQUID CRYSTALLINE POLYESTER RESIN COMPOSITION AND MOLDED PRODUCT THEREOF

    公开(公告)号:JPH04292651A

    公开(公告)日:1992-10-16

    申请号:JP5733191

    申请日:1991-03-20

    Abstract: PURPOSE:To provide a liquid crystal polyester resin composition having excellent heat resistance, moldability and mechanical characteristics and especially having improved welded part strength and improved anisotropy of the mechanical characteristics by adding glass fibers having an average fiber diameter of a specific range. CONSTITUTION:A liquid crystalline polyester resin composition obtained by melting and kneading (A) 100 pts.wt. of a liquid crystalline polyester resin comprising structural units of formulas I-IV (R1 is group of formula V, VI, etc.; R2 is group of formula VII, VIII, etc.; X is H, Cl), (the units of formulas I+II) being 60-95% based on (the units of formulas I+II+III), the units of formula III being 40-5mol.% of (the units of formulas I+II+III), the molar ratio of formula I/II being 75/25 to 95/5, and the intrinsic viscosity of the resin being 1-3dl/g, with (B) 5-200 pts.wt. of glass fibers having an average fiber diameter of 3-15mum, with a twin screw extruder at a temperature between the melting point of the component A and the melting point +

    PRODUCTION OF LIQUID CRYSTAL POLYESTER

    公开(公告)号:JPH04225021A

    公开(公告)日:1992-08-14

    申请号:JP40850290

    申请日:1990-12-27

    Abstract: PURPOSE:To obtain the subject polymer having excellent color tone and high heat-resistance by melting and polymerizing terephthalic acid, p-hydroxybenzoic acid, 4,4'-dihydroxy-biphenyl and other glycol component and carrying out solid- phase polymerization of the polymer under specific condition. CONSTITUTION:The objective liquid crystal polyester having a logarithmic viscosity of 1.5-4.5dl/g (measured in pentafluorophenol at a concentration of 0.1g/dl at 60 deg.C) and composed of the structural units of formula I, formula II (R1 is biphenylene, phenylene, etc.), formula III and formula IV (R2 is phenylene, biphenylene, etc.) can be produced by mixing p-hydroxybenzoic acid, 4,4'-dihydroxybiphenyl, acetic anhydride and polyethylene terephthalate, reacting at 130-250 deg.C for 5hr in nitrogen gas atmosphere, subjecting to deacetylation polymerization reaction at the ultimate vacuum degree of

    PRODUCTION OF LIQUID CRYSTALLINE POLYESTER

    公开(公告)号:JPH03275716A

    公开(公告)日:1991-12-06

    申请号:JP7763590

    申请日:1990-03-26

    Abstract: PURPOSE:To obtain the title polymer having high optical anisotropy, heat resistance, rigidity and impact resistance by reacting p-hydroxybenzoic acid with aromatic dihydroxy compound, aromatic diacetoxy compound, aromatic dicarboxylic acid and oligoester, etc. CONSTITUTION:(A) p-Hydroxybenzoic acid is reacted with (B) an aromatic dihydroxy compound such as 4,4'-dihydroxybiphenyl, (C) an aromatic diacetoxy compound such as diacetylated substance of the component B, (D) an aromatic dicarboxylic acid such as terephthalic acid and (E) a compound such as an oligomer of a condensate of the component D and ethylene glycol and acetic anhydride in the molar ratio of the component B/C of (9/1)-(0/10), acetylated and subjected deacetylation polymerization to give the objective polymer having structural units shown by formula I to formula IV (R1 and R2 are bifunctional aromatic groups), 77-95mol% structural units shown by formulas (I+II) based on structural units shown by formulas (I+II+III), 23-5mol% structural unit shown by formula III based on structural units shown by formulas (I+II+III) and a molar ratio of the structural unit shown by formula I/formula II of (75/25) (95/5).

    LIQUID CRYSTAL POLYESTER PRINTED BOARD

    公开(公告)号:JPH03183185A

    公开(公告)日:1991-08-09

    申请号:JP32337989

    申请日:1989-12-12

    Abstract: PURPOSE:To offer printed boards excellent in solder heat resistance and in molding workability by using a melt-moldable liquid crystal polyester having a specific structural unit. CONSTITUTION:Used is a melt-moldable liquid crystal polyester comprising structural units I, II, III and IV where structural unit I has a 40-90mol% of [I+II+III] and structural units II/III have mol ratios 9/1-1/9. Preferably the structural unit I is a polyester prepared from p-hydroxy benzoic acid; structural unit II is a structural unit consisting of 4,4'-dihydroxybiphenyl; structural unit III is 2,6-dihydroxynaphthalene; and structural unit IV is terephthalic acid. In the case of loading a liquid crystal polyester with filler, preferable loading is 200wt% or less to the liquid crystal polyester 100wt%, particularly, 15-100wt%.

    PRODUCTION OF SURFACE-METALLIZED FLAME-RETARDANT LIQUID CRYSTAL POLYESTER MOLDED ARTICLE

    公开(公告)号:JPH03146544A

    公开(公告)日:1991-06-21

    申请号:JP28712689

    申请日:1989-11-01

    Abstract: PURPOSE:To obtain an excellently finished surface having high adhesivity to plated surface without deteriorating the mechanical characteristics of the base resin or contaminating the plating bath by roughening the surface of a molded polyester with an alkaline solution and subjecting to the plating treatment. CONSTITUTION:The molded polyester article to be treated is composed of 100 pts.wt. of a liquid crystal polyester composed of the structural units of formulas I to V (R1 is group of formula V, etc.; R2 is group of formula VI, etc.; X is H or Cl) [the molar ratio of (I+II)/(I+II+III) is 77-95 deg.C, m/(I+II+III) is 23-5% and I/II is 75/25 to 95/5] and 0.5-30 pts.wt. of an organic bromine compound. The surface of the molded article is roughened with an alkaline solution and subjected to plating treatment. The alkali etching is carried out by immersing the article in a 5-50% aqueous solution of NaOH or KOH at 30-95 deg.C for 1-120min.

    FLAME-RETARDING LIQUID CRYSTAL POLYESTER

    公开(公告)号:JPH03134021A

    公开(公告)日:1991-06-07

    申请号:JP27270789

    申请日:1989-10-18

    Abstract: PURPOSE:To obtain the title polyester improved in flame retardancy, mechanical properties and molding appearance without using any halogenous flame retardant by combining five specified kinds of structural units. CONSTITUTION:A product of acylation of hydroxybenzoic acid, a product of diacylation of an aromatic dihydroxy compound and an esterifiable organophosphorus compound which can give structural units of any of formulas I-V (wherein R3, R5 and R7 are each a 1-6 C alkyl, an aryl; R4 and R6 are each a 1-15 C linear or cyclic alkylene residue or an arylene residue; Ar1 and Ar2 are each an alkylene, and may together be combined; and Ar3 is a trivalent aromatic residue) are reacted with an aromatic dicarboxylic acid, and the product is polymerized through the elimination of acetic acid to obtain the title polyester having an inherent viscosity (as measured in pentafluorophenol in a 0.1 g/dl concentration at 60 deg.C) of 0.5-5 dl/g and containing organophosphorus structural units selected from formulas I-V and formulas VI-IX (wherein R1 is formula X, formula XI or the like; R2 is formula X, formula XII or the like; X is H or Cl) in such an amount that formulas VI-VII is 77-95 mol% based on formulas VI-VIII, formula VIII is 23-5 mol% based on formulas VI-VIII, the molar ratio of formula VI to formula VII is 75-95/25-5, and formula I-V is 0.3-45 mol% based on formula VIII.

    AROMATIC POLYESTER
    30.
    发明专利

    公开(公告)号:JPH03126718A

    公开(公告)日:1991-05-29

    申请号:JP26452189

    申请日:1989-10-11

    Abstract: PURPOSE:To obtain the title polyester useful as an engineering plastic, having excellent mechanical properties, heat resistance and improved fluidity, comprising a specific structural unit which satisfy a specific condition. CONSTITUTION:The objective polyester having a structural unit shown by formula I to formula IV (R is group shown by formula V to formula VII; X is H or Cl), comprising 40-95mol% formula l based on formulas (I+II+III), molar ratio of the formula II/formula III of (95/5)-(5/95) and formula IV substantially equimolar to formulas (II+III) and having 0.5-20.0dl/g logarithmic viscosity at 0.1g/dl concentration dissolved in pentafluorophenol at 60 deg.C.

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