Toyo Ink Mfg. Co., Ltd.

Toyo Ink Manufacturing Company

Seiji Aida

Kaori Nakano

Seiji Sawada

Yasuharu Iida

Ken Yamasaki

Sunao Satake

Hisashi Uraki

Tsutomu Fujigamori

Shinichi Sato

Daisuke Fujiwara

Atsushi Yoda

Mitsuo Umezawa

Kazunori Shigemori

Ichiro Toyoda

Nozomi Tsushima

Eriko Seki

Akio Sato

Yasuo Yoshihiro

Hitoshi Sugamo

Toshiyuki Uemura

Daisuke Tanabe

Shigeyuki Ehashi

Shinya Fujimatsu

Takahiko Uesugi

Yoshimitsu Ueno

Jun Kaneda

Takashi Negishi

Eriko Suzuki

Hiroki Nishina

Kouhei Yamada

Provided is a maintenance liquid for inkjet printers, which comprises at least one of glycol ethers and glycol esters represented by the following general formulas (1) to (3), and 45 to 10 mg/L of dissolved oxygen:RCO(OR)OR&#x2003;&#x2003;General formula (1)RCO(OR)OCOR&#x2003;&#x2003;General formula (2)R(OR)OR&#x2003;&#x2003;General formula (3)

Maintenance liquid for inkjet printers

A non-aqueous ink jet which has less bad odor, has excellent safety and sanitariness, excellent resin dissolvability, excellent printing stability and excellent dryability, causes no corrosion of printers, and has good adhesiveness to non-absorbent substrates, and an ink set are provided. In the non-aqueous inkjet ink comprising a pigment, a resin and a mixed solvent, the mixed solvent comprises diethylene glycol dialkyl ether and tetraethylene glycol dialkyl ether.

Nonaqueous inkjet ink and ink set

Present invention relates to an inkjet ink used for a polyvinyl chloride resin sheet, wherein the inkjet ink comprises an organic solvent, a pigment and a vinyl chloride-vinyl acetate resin, the organic solvent is a mixed solvent comprising at least one compound selected from the group consisting of compounds represented by a formula (1) and compounds represented by a formula (2), together with a lactone compound, and the quantity of the lactone compound is within a range from 1 to 40% by weight relative to the total weight of the ink. [Formula 1]CHCO(OR)OR&#x2003;&#x2003;(1)(wherein, Rrepresents an ethylene group or propylene group, Rrepresents an alkyl group of 1 to 4 carbon atoms, and m represents an integer from 1 to 3)[Formula 2]CHCH(OH)COOR&#x2003;&#x2003;(2)(wherein, Rrepresents an alkyl group of 1 to 8 carbon atoms).

Inkjet ink for polyvinyl chloride resin sheet

An ink composition containing an organic solvent and a pigment, which has a little amount of smell, excellent safety and health properties, excellent resin solubility, excellent printing stability and excellent drying properties, causes no corrosion to a printer, and is excellent in adhesion to non-absorbable printing media and good printability, wherein the ink composition comprises as the organic solvent at least one compound selected from compounds of the formula (1) and (2),  wherein each of R, Rand Rindependently represents an oxygen atom or &#x2014;NR&#x2014; wherein Rrepresents an alkyl group having 1 to 3 carbon atoms, a hydroxyalkyl group, a hydroxyl group or a hydrogen atom, and each of Rand Rindependently represents a branched or non-branched hydrocarbon group represented by CmHn wherein m is an integer of 2 to 8 and n is an integer of 2m-4, 2m-2 or 2m.

Ink composition

An ink composition containing an organic solvent and a pigment, which has a little amount of smell, excellent safety and health properties, excellent resin solubility, excellent printing stability and excellent drying properties, causes no corrosion to a printer, and is excellent in adhesion to non-absorbable printing media and good printability, wherein the ink composition comprises as the organic solvent at least one compound selected from compounds represented by the formulae (1) to (3), wherein each of R, R, R, R, Rand Rindependently represents an alkylene group having 1 to 4 carbon atoms or an alkenylene group having 2 to 4 carbon atoms and each of R, Rand Rindependently represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms.

The invention relates to a pigment dispersion comprising: a condensate of or a salt between a polyallylamine and a polyester having a free carboxylic acid or the salt; a pigment derivative represented by the following general formula (1); a pigment; and an organic solvent,(P&#x2212;X)[N(R, R, R, R)]&#x2003;&#x2003;general formula (1)

Pigment dispersion and use thereof

The present invention relates to an aqueous pigment dispersion that shows excellent dispersibility and storage stability, an inkjet ink that shows excellent jetability, water resistance, and adhesion, and a process for producing an aqueous pigment dispersion that shows excellent dispersibility and storage stability, as well as superior jetability, water resistance and adhesion. An aqueous pigment dispersion of the present invention comprises a dispersion formed by dispersing a monoalkyl maleate graft polymer of a maleic anhydride/&#x3b1;-olefin copolymer in water in the presence of a base, a pigment, and an aqueous medium.

Aqueous pigment dispersion, inkjet ink, and process for producing aqueous pigment dispersion

A water-based pigment dispersion comprising 100 parts by weight of a pigment, 3 to 30 parts by weight of a sulfonic acid group-containing pigment derivative and water, wherein the sulfonic acid group-containing pigment derivative has only one sulfonic acid group in a molecule of a pigment of which the type is the same as the type of the pigment to be dispersed, the sulfonic acid group forms at least one salt selected from the group consisting of ammonia salt, an organic amine salt and a salt in which at least 15% of the sulfonic acid group is liberated and the rest is a salt with monovalent metal, the content of metal ion having a valence of at least 2 in a solid matter of the above water-based pigment dispersion is 500 ppm or less, and the above pigment is dispersed in water according to electrostatic repulsion due to the sulfonic acid group-containing pigment derivative adsorbed on the particle surface of the pigment, an inkjet recording liquid containing the same and process for the production thereof.

Water-based pigment dispersion, use thereof and process for the production thereof

A water-dispersed inkjet recording liquid excellent in water resistance and transparency and also excellent in the property of ejection from a nozzle, containing, as a colorant, a water-based dispersion of an organic pigment (A) which is at least one member selected from the group consisting of a quinacridone pigment, a benzimidazolone pigment, an insoluble azo pigment, a fuzed azo pigment, a quinophthalone pigment, a naphthol pigment, a perylene pigment and an isoindolinone pigment and has an average particle diameter of 10 to 150 nm (measured by laser scattering), the water-based dispersion of the organic pigment (A) being obtained by mechanically kneading a mixture containing at least three components of the organic pigment (A), a water-soluble inorganic salt (B) in an amount by weight at least three times as large as the amount of the organic pigment (A) and a water-soluble solvent (C) to finely mill the organic pigment (A), and then removing the water-soluble inorganic salt (B) and the water-soluble solvent (C) by washing the kneaded mixture with water, and a process for the production thereof.

Inkjet recording liquid and process for the production thereof

An inkjet recording ink having excellent water resistance and having excellent ejection stability through a nozzle, which ink is obtained by dispersing colorant particles in a water-based liquid, the colorant particles being a product formed by coating each of resin particles having an average particle diameter of 50 to 300 nm with an organic pigment.

Water-based ink-jet recording fluid

Aqueous pigment paste for offset ink, process for producing the paste,

The present invention relates to an ink jet recording liquid obtained by dispersing a pigment in an aqueous medium, said aqueous medium comprising glycerol and 1,3-propanediol. The ink jet recording liquid of the present invention is capable of sustaining prolonged stable discharge onto the recording surface without clogging the nozzle of an ink jet printer and exhibits excellent storage stability.

Ink jet recording liquid

Recording fluid for ink-jet printing and process for the production

Growing community of inventors

Tokyo, Japan

Seiji Aida