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:
Dec. 22, 2015
Filed:
Jun. 28, 2011
Takeshi Niitani, Ichihara, JP;
Gou Mishima, Ichihara, JP;
Yuichi Tateishi, Ichihara, JP;
Toshiaki Okado, Ichihara, JP;
Hidenori Naruse, Tokyo, JP;
Tooru Kajita, Tokyo, JP;
Takeshi Niitani, Ichihara, JP;
Gou Mishima, Ichihara, JP;
Yuichi Tateishi, Ichihara, JP;
Toshiaki Okado, Ichihara, JP;
Hidenori Naruse, Tokyo, JP;
Tooru Kajita, Tokyo, JP;
NIPPON SODA CO., LTD., Tokyo, JP;
Abstract
An object of the present invention is to provide a novel copolymer useful as a dispersing agent for a pigment or the like. The novel copolymer contains: a block chain (A) comprising at least one repeating unit selected from the group consisting of a repeating unit having a tertiary amino group and a repeating unit having a quaternary ammonium salt group; and a block chain (B) comprising a repeating unit having an acidic group and a repeating unit represented by the following formula (I) (wherein Rrepresents a hydrogen atom or a C1-C3 alkyl group; and Rrepresents an aliphatic hydrocarbon group or an alicyclic hydrocarbon group), wherein the repeating unit represented by formula (I) has a copolymerization ratio of 90 mass % or more in the block chain (B).