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:
Jan. 29, 2019
Filed:
Jan. 29, 2016
Applicant:
Otsuka Chemical Co., Ltd., Osaka, Osaka, JP;
Inventor:
Satoru Masumoto, Tokushima, JP;
Assignee:
OTSUKA CHEMICAL CO., LTD., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C09D 17/00 (2006.01); C09D 153/00 (2006.01); C08F 293/00 (2006.01);
U.S. Cl.
CPC ...
C08F 293/005 (2013.01); C09D 17/00 (2013.01); C09D 153/00 (2013.01); C08F 2438/00 (2013.01);
Abstract
Provided is a block copolymer with an acid group that, when used as a dispersant, can provide a dispersion composition having excellent dispersion stability, a dispersant containing the block copolymer, and a pigment dispersion composition using the dispersant. The block copolymer is an ABA block copolymer including an A block and a B block and has the feature that its acid value is 30 to 250 mgKOH/g and the B block contains a structural unit derived from a vinyl monomer with an acid group.