Kao Corporation

Norihiro Fukuri

Takashi Kubo

Yasunori Inagaki

Katsutoshi Aoki

Christopher Johnson

Eiji Shirai

Yoshihiro Ueno

Shoichi Murata

Hidenori Tachi

Yoshitomo Kimura

Osamu Yamashita

Hiroki Kakiuchi

Takahiro Yoshikawa

Hiroto Soma

Hiroki Kubo

The present invention provides an asphalt composition containing an asphalt and a polyester, the polyester being a polycondensate of a polyethylene terephthalate, an alcohol, and a carboxylic acid compound, the polyethylene terephthalate having a value of [(a quantity of heat absorbed in a DSC measurement)−(a quantity of heat generated in a DSC measurement)] of 5 J/g or more and 30 J/g or less and having an intrinsic viscosity (IV) of 0.6 or more and 1.05 or less.

Asphalt composition

The present invention relates to an asphalt composition containing asphalt and a polyester, wherein the polyester includes an alcohol component-derived structural unit including an alkylene oxide adduct of bisphenol A and an alkylene glycol compound having 3 or more carbon atoms (exclusive of the alkylene oxide adduct of bisphenol A).

A resin dispersion for dye receiving layer of a thermal transfer image-receiving sheet, including a polyester resin particle and an aqueous medium. The polyester resin particle includes a polyester resin that is a polycondensate of an alcohol component including at least one of a propylene oxide adduct of 2,2-bis(4-hydroxyphenyl)propane and an ethylene oxide adduct of 2,2-bis(4-hydroxyphenyl)propane, and a carboxylic acid component including an aliphatic dicarboxylic acid compound having a carbon number of 6 or more and 10 or less. A molar ratio of the propylene oxide adduct of 2,2-bis(4-hydroxyphenyl)propane to the ethylene oxide adduct of 2,2-bis(4-hydroxyphenyl)propane in the alcohol component is 0/100 or more and 40/60 or less. A molar ratio of the ethylene oxide adduct of 2,2-bis(4-hydroxyphenyl)propane to the aliphatic dicarboxylic acid compound having a carbon number of 6 or more and 10 or less is 2.1 or more and 15 or less.

Resin-dispersed liquid for dye-receptor layer

An embodiment of the present invention relates to a method for producing a binder resin, from which a toner having excellent low-temperature fusing property, roller release properties, and pulverization properties, is obtained, a binder resin, and a toner for development of electrostatic images including the binder resin. An embodiment of the present invention relates to a method for producing a binder resin including the following steps (1) and (2):

Method for producing binder resin

Embodiments of the present invention are concerned with a method for producing a binder resin composition, from which a toner having excellent low-temperature fusing property, heat-resistant storage stability, durability, and image density is obtained, a binder resin composition, and a toner for development of electrostatic images including the binder resin composition. Embodiments according to the present invention are concerned with the following [1] to [3].

Method for producing binder resin composition

A method for producing a toner for electrostatic image development, including the steps of (1) polycondensing an alcohol component, a carboxylic acid component, and polyethylene terephthalate to provide an amorphous polyester; and (2) subjecting the amorphous polyester obtained in the step (1) and components containing a crystalline polyester in an amount of from 0.3 to 2.5 times the mass of the components derived from the polyethylene terephthalate in the amorphous polyester to a process for producing a toner. The toner for electrostatic image development obtained by the method of the present invention is suitably used in development or the like of latent images formed in, for example, an electrophotographic method, an electrostatic recording method, an electrostatic printing method, or the like.

Method for producing toner for electrostatic image development

The present invention relates to a toner for electrophotography including core-shell particles as a resin binder each including a core portion containing an amorphous resin (A) having a softening point of 105&#xb0; C. or lower which is obtained by polycondensing a carboxylic acid component containing an alkenyl succinic acid with an alcohol component; and a shell portion containing an amorphous resin (B) obtained by polycondensing an alcohol component containing an aliphatic diol having 2 to 6 carbon atoms with a carboxylic acid component containing a trivalent or higher-valent polycarboxylic acid compound in an amount of 20 mol % or less. The toner for electrophotography according to the present invention is excellent in heat resistant storage property, low-temperature fusing property and durability.

Toners for electrophotography

The present invention relates to a toner for electrophotography including core-shell particles each including a core containing a amorphous composite resin (A) which contains a segment (A) formed of a polyester resin and a segment (A) formed of a styrene-containing addition polymer as a constitutional unit thereof and a shell containing a amorphous resin (B) obtained by polycondensing an alcohol component containing an aliphatic diol having 2 to 6 carbon atoms with a carboxylic acid component.

A polyester resin for a toner obtained by polycondensing a carboxylic acid component and an alcohol component, wherein the polyester resin for a toner is obtained using, as the carboxylic acid component and/or the alcohol component, a specified aromatic compound; a polyester resin for a toner obtained by polycondensing a reaction product obtained by treating a specified aromatic compound with a carboxylic acid having an unsaturated reactive group, a carboxylic acid component, and an alcohol component; a resin binder for a toner, containing the polyester resin for a toner; and a toner for electrophotography, containing the resin binder. The polyester resin for a toner of the present invention is suitably used for a resin binder of a toner used in developing and the like of latent images formed in electrophotography, electrostatic recording method, electrostatic printing method or the like.

Polyester resin for toner

A resin binder for a toner obtained by polycondensing a carboxylic acid component and an alcohol component in the presence of a lignin compound; a toner for electrophotography, containing the resin binder; and a method for producing a resin binder for a toner, including the step of polycondensing a carboxylic acid component and an alcohol component in the presence of a lignin compound. The resin binder for a toner of the present invention is suitably used as a resin binder of a toner used in development of latent images formed in electrophotography, electrostatic recording method, electrostatic printing method or the like.

Binder resin for toner

A resin binder for use in a toner for electrophotography, containing a polycondensation resin obtainable by polycondensing an alcohol component containing an aliphatic polyhydric alcohol having two or more secondary carbon atoms with a hydroxyl group bound thereto (an alcohol A), and a carboxylic acid component, wherein the alcohol A is contained in an amount of from 10 to 100% by mol, of the alcohol component; and a toner for electrophotography containing the resin binder. The toner for electrophotography of the present invention is suitably used in developing latent images formed in electrophotography, electrostatic recording method, electrostatic printing method or the like.

Electrophotographic toner

A polyester for a toner obtained by polycondensing an aliphatic hydroxycarboxylic acid compound having a total number of hydroxy group or groups and carboxyl group or groups of 4 or more; an alcohol component containing an aliphatic diol having a hydroxyl group bound to a secondary carbon atom in an amount of 50% by mol or more; and a carboxylic acid component, provided that the aliphatic hydroxycarboxylic compound is not included, wherein the aliphatic hydroxycarboxylic acid compound and the aliphatic diol having a hydroxyl group bound to a secondary carbon atom are in a molar ratio, i.e. the aliphatic hydroxycarboxylic acid compound/the aliphatic diol having a hydroxyl group bound to a secondary carbon atom, of from 0.05 to 0.8; a resin binder for a toner, containing the polyester; and a toner for electrophotography, containing the resin binder. The polyester for a toner of the present invention is suitably used for a resin binder of a toner usable in development or the like of latent images formed in, for example, electrophotography, electrostatic recording method, electrostatic printing method or the like.

Polyester for toner

A polyester resin for a toner, obtained by polycondensing a carboxylic acid component and an alcohol component, wherein the carboxylic acid component and/or the alcohol component contains an aromatic compound represented by the formula (Ia): wherein Ris a hydrogen atom, a hydroxyl group, or a methoxy group; and Xis a hydrogen atom, an aldehyde group, an allyl group, a vinyl group, a methoxy group, or a hydroxyl group or carboxyl group which may have a linking group. The toner for electrophotography containing a polyester resin for a toner of the present invention is suitably used for a resin binder of a toner used in developing and the like of latent images formed in electrophotography, electrostatic recording method, electrostatic printing method or the like.

Growing community of inventors

Wakayama, Japan

Norihiro Fukuri