Polyplastics Co., Ltd.

Daicel Chemical Industries, Ltd.

Mitsuo Wada

Mitsuhiro Mochizuki

Takayuki Ishikawa

Toshio Kanoe

Hiroaki Konuma

Yoshiharu Suzuki

Kazushi Watanabe

Toshiro Murao

Hiromitsu Seitou

Koichi Kato

Naoki Wakita

Hiroo Horiuchi

Hiromitsu Seitoh

The present invention provides a resin composition which is lowly water-absorbent and is excellent in properties such as mechanical strength, flexibility and heat resistance while improving the compatibility of the conventional resin composition comprising a polyamide resin and a thermoplastic polyester resin, and which comprises 100 parts by weight of a mixture composed of:

Composition of polyamide, polyester and glycidyl vinylic copolymer

A thermoplastic polyester composition is improved in mechanical properties and comprises a polyester, a vinyl polymer having --COOH, alkyl ester of --COOH, phenyl or cyano and an olefin copolymer comprising an alpha-olefin and an alpha, beta-unsaturated acid glycidyl ester or (C.sup.2) a graft copolymer comprising said olefin copolymer (C.sup.1) and one or more (co)polymers mainly comprising repeating units represented by the following general formula (2), wherein said copolymer (C.sup.1) and said (co)polymers are chemically bonded to each other to form a branched or crosslinked structure: ##STR1## wherein R.sup.2 stands for a hydrogen atom or a lower alkyl group and Y stands for one or more groups selected from --COOH, an alkyl ester of --COOH having 1 to 8 carbon atoms in the alkyl, phenyl and cyano.

Thermoplastic polybutylene terephthalate resin compositions and molded

Polybutylene terephthalate (PBT) injection-molding compositions exhibit improved mold-release properties and sufficient extruder screw 'bite' during injection molding. The PBT compositions are a polyblend of a PBT base resin with an effective amount (preferably between about 0.01 to 10 parts by weight) of a processing aid which is a sorbitan ester of a fatty acid having at least 12 carbon atoms. The PBT injection molding compositions of the invention may be used in a variety of end-use applications (e.g., the automotive and/or electronic industries) to form stable injection-molded thin-walled and/or complex-shaped articles.

Injection-moldable polybutylene terephthalate resin compositions and

Polyester resin molding compositions exhibiting exceptional low temperature physical properties (i.e., flexibility and toughness) and satisfactory mold-release properties include a melt-blend of a polyester base resin (preferably one which predominantly contains polybutylene terephthalate units), a polyester elastomer (preferably a copolyester having hard and soft segments), and a mold-release effective amount of a sorbitan ester (preferably an ester reaction product of a sorbitan with fatty acid having at least 12 carbon atoms). The sorbitan ester most preferably has a hydroxyl value of between 50 to 400, exclusive, so that blooming during injection molding operations (e.g., a predrying stage) is minimized (if not eliminated entirely). Molded articles formed of the compositions of this invention may be used in a variety of applications, for example, as parts for the automotive and/or electronics industries.

Polyester resin molding compositions and molded articles formed of the

Polyester resin compositions include a crystalline thermoplastic polyester resin (such as polybutylene terephthalate), a polyester elastomer (such as a copolymer including recurring hard and soft segments) and between 0.005 to 10 parts by weight, based on 100 parts of the crystalline and elastomeric resins, of an amide compound having the formula (I) ##STR1## wherein R is an organic group such as an aromatic ring, X is an alkylene of C.sub.2 to C.sub.10 such as ethylene and propylene, Y is --COOH, --OH, --SH or --NH.sub.2 and n is 2 to 4, inclusive.

Polyester resin compositions exhibiting long-term temperature

Three dimensional molded articles comprising liquid crystalline polyesters are recognized to be extremely difficult to finish such as by printing, painting, metallizing, plating, etc. An effective answer to this difficulty is provided by initially blending within the liquid crystalline polyester at least one particulate inorganic filler selected from the group consisting of Group II elements of the periodic table and oxides, sulfates, phosphates, silicates, and carbonates thereof, and elements of aluminum, silicon, tin, lead, antimony, and bismuth and oxides thereof, in an amount of 5 to 80 percent by weight; forming a molded article from the same; and contacting the resulting molded article with an acidic solution containing at least 80 percent by weight of sulfuric acid. The requisite surface modification for finishing to form a quality product is made possible.

Method of treating the surface of a molded article comprising liquid

A liquid crystal polyester composition comprising 99.5 to 30 percent by weight of a polyester being melt-processable and being capable of forming the anisotropic phase in a melt state and 0.5 to 70 percent by weight of a plate-like filler and is improved in resistance to deformation.

Liquid crystal polyester composition

A liquid crystal polyester composition having an improved resistance to deformation comprising 99.5 to 30 percent by weight of a polyester which is melt-processable and capable of forming an anisotropic phase in the melt state and 0.5 to 7 percent by weight of filler particles.

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Shizuoka, Japan

Mitsuo Wada