Mitsui Petrochemical Industries, Ltd.

Mitsui Chemicals, Inc.

Fuji Xerox Co., Ltd.

Kirin Beer Kabushiki Kaisha

Arakawa Chemical Industries, Ltd.

Hideki Sakai

Seiichi Ikeyama

Fumitoshi Ikejiri

Kazuo Ishiwatari

Toshiyuki Tsutsui

Mamoru Kioka

Takashi Ueda

Masaki Kohyama

Kenichi Morizono

Tetsuji Kasai

Yoshinori Akana

Masaya Yamada

Hideo Toyoda

Kenji Iwata

Chiaki Suzuki

Takayoshi Aoki

Yohzoh Yamamoto

Atsuhiko Eguchi

Mikio Nakagawa

Sanehiro Yamamoto

Kazumitsu Kawakita

Tsuneo Yashiki

Masao Maeda

Keiji Kawamoto

Hiroshi Nishikawa

Takashi Hiraoka

Yukiharu Yamada

Tsuyoshi Kage

Kimio Ueda

Junji Tan

Kan Matsumoto

Hiroyuki Hori

Hirotaka Aso

Satoshi Matsumoto

Koji Takahashi

Takeo Kigami

Heat-fixable developer for electrophotography

Dispersant for pigments for aromatic polymers

A thermal fixing developer material for electrophotography is provided. This developer material is adapted for use as a main component of an electrostatic toner, and the toner produced by using this developer material exhibits excellent release properties upon thermal fixing, and in particular, upon thermal fixing at low temperature, and therefore, is free from offset and contamination of carrier, photosensitive material, heat roller, and the like. Such a toner is also provided with high blocking resistance. The developer material of this invention comprises a wax of a propylene-based copolymer having a particular molecular weight, a particular melting point, and a particular compositional distribution.

Thermal fixing developer material and wax for electrophotography

A toner for developing electrostatic latent images containing a binder resin, a colorant, and a lubricant, wherein the lubricant comprises a modified polyethylene wax which is obtained by homopolymerizing ethylene or copolymerizing ethylene and an .alpha.-olefin having 3 to 10 carbon atoms in the presence of a metallocene catalyst and modifying the resulting homo- or copolymer by grafting thereto a styrene monomer and/or an unsaturated carboxylic acid monomer, the lubricant having a hexane extraction of not more than 65% by weight. The toner exhibits release properties at a lower temperature and thereby has satisfactory anti-offset properties without impairing powder fluidity and anti-blocking properties. It provides a toner image resistant against scratches by a peeling claw of a fixing roll part and against rub-of.

Toner for developing electrostatic latent images

A crystalline thermoplastic resin composition comprises a rosin acid metallic salt and a crystalline thermoplastic resin. Optionally, a compatibilizing agent may also be included. The rosin acid metallic salt, which acts as a crystal nucleating agent, increases the crystallization rate of the crystalline thermoplastic resin and enables the formation of fine crystals of the resin. Thus, the crystalline thermoplastic resin composition can crystallize at a high rate, and provide molded articles having excellent mechanical properties and/or optical properties.

Process for crystal nucleation of crystalline thermoplastic resin

The container according to the invention is composed of a saturated polyester resin composition comprising a saturated polyester �A! in an amount of 50 to 95 parts by weight, a metallic salt of an ethylene/unsaturated carboxylic acid copolymer �B! in an amount of 0.5 to 20 parts by weight, a modified ethylene/.alpha.-olefin copolymer rubber �C! in an amount of 0.5 to 30 parts by weight, a benzotriazole type weathering stabilizer �D! in an amount of 0.01 to 2.0 parts by weight and a hindered amine type weathering stabilizer �E! in an amount of 0 to 2.0 parts by weight, and if necessary, a carbodiimide compound �F! in an amount of 0.01 to 5.0 parts by weight, the amounts of said components �D!, �E! and �F! being each based on 100 parts by weight of the total amounts of the components �A!, �B! and �C!. The container of the invention is excellent in not only low-temperature impact strength but also rigidity, weld strength, weathering resistance and fade resistance.

Container composed of a saturated polyester resin composition

The cycloolefin resin compositions of the present invention comprise a thermoplastic resin containing an olefin polymer having an alicyclic structure, specific stabilizers selected from phenolic stabilizers, organic thioether stabilizers, organic phosphite stabilizers, UV-ray absorbers and hindered amine stabilizers. The cycloolefin resin compositions show excellent thermal aging resistance and weathering resistance by the use of specific stabilizers, and therefore they are favorably used for forming optical instrument parts. Furthermore, the thermoplastic resin may be prepared from an olefin polymer having an alicyclic structure and a flexible polymer or flexible polymers. The incorporation of the flexible polymer especially improves the mechanical strength of the resultant products, and therefore the resin compositions are favorably used for machine parts, electronic parts, automobile parts, etc.

Thermally stabilized thermoplastic cycloolefin in resin compositions

The present invention relates to a novel ethylene/pentene-1 copolymer whose molded film has a good balance between impact resistance and tear properties and high transparency, also is prominently reduced in a variation of the transparency even after subjected to a heat treatment, and further shows high blocking resistance, provided that the copolymer fulfills specific requisites. The invention also relates to a process for the preparation of the above-mentioned ethylene/pentene-1 copolymer and a formulation of the ethylene/pentene-1 copolymer composition using a stabilizer. According to the invention, there can be obtained an ethylene/pentene-1 copolymer composition which is excellent in heat stability in the molding stage, long-term heat stability and weatherability.

Ethylene/pentene-1 copolymer and ethylene/pentene-1 copolymer composition

Ethylene/pentene-1 copolymer, and ethylene/pentene-1 copolymer

The present invention provides resin compositions containing thermoplastic resins. Thermoplastic resins employable for the compositions are polyolefin resins, polyester resins, polystyrene resins, polyamide resins and polyphenylene ether resins. The present invention can be particularly effected by using polyamide, particularly, specific aromatic polyamides. In the present invention, the resin compositions can be improved in various chemical and physical properties such as flame-retardance, moldability, color tone, heat stability, mechanical strength by the use of other resin component and stabilizers such as halogenated organic compounds, modified polyolefins, antimony compounds, phosphorus-containing compounds, amine- or phosphorus-type stabilizers.

Flame retardant polyamide thermoplastic resin composition

A polyamide resin composition which comprises: (A) an aromatic polyamide resin comprising preferably a terephthalic acid component and a diamine component comprising at least one of an aliphatic diamine component and an alicyclic diamine component; (B) a fibrous reinforcement; and (C) at least one additive selected from the group consisting of a salt of the group I, II and III metals of the periodic table of a higher fatty acid salt and an acid ester, a partially saponified ester and a metal salt of an aliphatic carboxylic acid of 26-32 carbons. The resin composition is of high fluidity and mold-releasing properties as well as of high heat resistance and rigidity, so that the composition can be molded with decomposition of the resins.

Polyamide resin compositions

A flame retardant cyclic olefinic polymer composition which comprises

Flame retardant cyclic olefinic polymer composition

A composition comprising (I) a thermally stable polyamide such as an aromatic polyamide, (II) a halogenated polystyrene or a halogenated polyphenylene oxide, and (III) sodium antimonate has excellent fire retardancy and excellent thermal stability during molding. The thermal stability of the composition is further enhanced by including (IV) a hydrotalcite-type complex hydroxide or (V) magnesium oxide and/or zinc oxide.

Fire-retardant polyamide composition having good heat resistance

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Yamaguchi, Japan

Hideki Sakai