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. 24, 2012
Filed:
Jun. 04, 2008
Hiroyuki Shimanaka, Chuo-ku, JP;
Yoshikazu Murakami, Chuo-ku, JP;
Satoshi Isobe, Chuo-ku, JP;
Takaaki Ota, Chuo-ku, JP;
Jyunki Takada, Chuo-ku, JP;
Satoshi Dosho, Chuo-ku, JP;
Hiroyuki Shimanaka, Chuo-ku, JP;
Yoshikazu Murakami, Chuo-ku, JP;
Satoshi Isobe, Chuo-ku, JP;
Takaaki Ota, Chuo-ku, JP;
Jyunki Takada, Chuo-ku, JP;
Satoshi Dosho, Chuo-ku, JP;
Dainichiseika Color & Chemicals Mfg. Co., Ltd., Tokyo, JP;
Abstract
A pigment dispersant contains (a) 5 to 30 wt % of aromatic and/or heterocyclic vinyl monomer units, (b) 10 to 30 wt % of monomer units having acid groups, (c) 40 to 80 wt % of (meth)acrylate ester monomer units, and (d) 5 to 30 wt % of monomer units having poly(C-alkylene glycol) chains or mono(C-alkyl)ether chains of said glycol, said poly(C-alkylene glycol) chains or mono (C-alkyl)ether chains having a number average molecular weight of from 150 to 1,500. A sum of the monomer units (a) to (d) amounts to 100 wt %. The pigment dispersant has an acid value of from 30 to 300 mgKOH/g, a number average molecular weight of from 5,000 to 30,000, and a content of organic compounds, boiling points of which are not higher than 250° C., of not higher than 0.2 wt %. Also disclosed are its production process, its aqueous solution and its dispersion.