The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 30, 2002
Filed:
Apr. 04, 2000
Kenji Kitamura, Tokyo, JP;
Ataru Chiba, Tokyo, JP;
Toyo Ink Mfg. Co., Ltd., Tokyo, JP;
Abstract
There are disclosed a pigment composition comprising a dry-milled pigment, a water-soluble resin, and a nonionic surfactant composed of a compound having an acetylenic linkage; and a method for producing a pigment composition, comprising dry-milling a pigment containing coarse particles in the presence of a water-soluble resin and a nonionic surfactant composed of a compound having an acetylenic linkage. The production method is also possible in the form of comprising (a) dry-milling a pigment containing coarse particles in the presence of a nonionic surfactant composed of a compound having an acetylenic linkage thereby obtaining an intermediate milled product, and (b) further dry-milling a mixture of the intermediate milled product and a water-soluble resin. For producing an aqueous pigment dispersion product, there is also disclosed herein a method comprising the steps of (a) dry-milling a pigment containing coarse particles in the presence of a water-soluble resin thereby obtaining a milled product, and (b) dispersing the milled product in water in the presence of a nonionic surfactant composed of a compound having an acetylenic linkage.