Kao Corporation

Kazunari Takemura

Rikio Tsushima

Makoto Okubo

Masahiro Mori

Yukiya Sato

Akito Itoi

Shoichiro Harada

Mitsuru Sakai

Minoru Sawai

Shoji Ohtani

Kenichi Miyamoto

Takehiro Tsutsumi

Koji Azuma

Yukihiro Fukuyama

Yutaka Yasuda

The present invention relates to (A) a water dispersion for ink-jet printing including particles of a waster-insoluble crosslinked polymer which contain a colorant, and a water-insoluble organic compound, wherein the water-insoluble crosslinked polymer is (1) a polymer produced by crosslinking a water-insoluble polymer with a crosslinking agent; (2) a polymer produced by crosslinking 100 parts by weight of the water-insoluble polymer with 0.5 to 9.5 parts by weight of the crosslinking agent; or (3) a polymer having a weight-average segment molecular weight of from 1,400 to 20,000 as calculated from [(weigh-average molecular weight of the water-insoluble polymer)/(number of molar equivalents of the crosslinking agent to be reacted with 1 mol of the water-insoluble polymer+1)]; (B) an ink for ink-jet printing containing the above water dispersion which is excellent in gloss and storage stability; and (C) particles of the water-insoluble crosslinked polymer.

Water-based inks for ink-jet printing

The present invention relates to a water-based ink for ink-jet printing which is excellent in rubbing resistance upon printing on coated papers such as photographic papers, and also exhibits a high optical density upon printing on plain papers. The water-based ink for ink-jet printing according to the present invention includes a dispersion of a pigment wherein the number of pigment-containing polymer particles in the pigment dispersion which have a particle size of 0.57 &#x3bc;m or more among the pigment-containing polymer particles contained in the pigment dispersion in the ink is 1.2&#xd7;10/mL or less.

Water base ink for inkjet recording

A process for producing a polyurethane foam which comprises mixing a polyol solution comprising 100 parts by weight of a polyester-polyol, 0.1 to 1.8 parts by weight of water and 0.1 to 5 parts by weight of urea, and a catalyst with a polyisocyanate compound and foaming the mixture. According to the process, there can be produced a polyurethane foam which satisfies both productivity and moldability even when having a low density, and is suitable for use in shoe soles.

Process for producing polyurethane foam

A polyester-polyol being liquid at 40&deg; C. and having a viscosity of not more than 10,000 mPa&middot;s at 60&deg; C., prepared by polycondensation of an acid component including at least one phthalic acid component selected from phthalic anhydride and o-phthalic acid, and an aliphatic polybasic acid, with a polyhydric alcohol; a process for preparing a polyurethane foam including reacting a polyisocyanate component with a polyol component including the polyester-polyol; a process for preparing an isocyanate prepolymer from a polyisocyanate component and a polyol component including the polyester-polyol; and a process for preparing a polyurethane foam including reacting an isocyanate prepolymer prepared from a polyisocyanate component and a polyol component including the polyester-polyol, with a polyol component. The resulting polyurethane foam shows remarkably improved physical properties such as tensile strength and tear strength, while having low density, acceptable appearance and texture.

Low viscosity polyester-polyols and polyurethane foams prepared therefrom

Urethane foam for shoe soles

A polyester-polyol prepared by polycondensation of an acid component comprising terephthalic acid and adipic acid, and a polyhydric alcohol component, wherein the molar ratio of the terephthalic acid/adipic acid is 0.05 to 0.3; a process for preparing a polyurethane foam comprising reacting a polyisocyanate component and a polyol component, wherein the polyol component contains the above polyester-polyol; and a process for preparing a polyurethane foam comprising reacting an isocyanate prepolymer made of a polyisocyanate component and a polyol component (I) with a polyol component (II), wherein the polyol component (I) comprises the above polyester-polyol.

Process for preparing polyurethane foam

A toner composition is obtained by the dispersion polymerization of a monomer in the presence of a charge-controlling agent, a colorant and a specified dispersant of a higher fatty acid salt of a long-chain alkyl or hydroxyalkyl amine, a polyoxyalkene-phenyl or alkylphenyl-ether or a polyethyleneimine. The toner composition is useful for developing an electrostatic image in an electrophotographic process and the like.

Electrographic toner and process for preparation thereof

A developing toner composition is effectively prepared by dispersing in a polymerizable monomer a charge controller, a coloring agent and a highly dielectric material having a dielectric constant of at least 10 at room temperature and a volume resistivity of at least 1.times.10.sup.10 ohm.cm and dispersion-polymerizing the resulting dispersion in an aqueous medium in the presence of a dispersion stabilizer to obtain resin particles.

Electrostatic image developing toner with high dielectric material

An electrophotographic toner composition, improved in uniform dispersion therein of carbon black and electrophotographic properties, comprises a binder polymer, carbon black and a compound selected from the group consisting of a sulfonate compound having the formula (I), an alkaline earth metal salt of a basic alkylphenol persulfide having the formula (II), an alkyl or alkenyl succinic acid imide having the formula (III-1) or (III-2), an alkyl salicylic acid salt having the formula (IV), a compound having the formula (V) and a product obtained by treating the compound (V) with sulfur, in which R, R', R1 and R2 are a substituent and M is an alkaline earth metal. ##STR1##

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Wakayama, Japan

Kazunari Takemura