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. 28, 2015
Filed:
Nov. 02, 2011
Takeshi Niitani, Ichihara, JP;
Toshiaki Okado, Ichihara, JP;
Hidenori Naruse, Tokyo, JP;
Tooru Kajita, Tokyo, JP;
Takeshi Niitani, 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 pigment dispersing agent in the field of color liquid crystal displays and the like. A copolymer of the present invention 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 base; and a block chain (B) comprising a repeating unit represented by formula (I) (wherein Rrepresents a hydrogen atom or the like, Rand Reach independently represent a hydrogen atom or the like, Q represents an oxygen-containing saturated heterocyclic group optionally having an alkyl group as a substituent or the like, and n represents an integer of 0 to 6), and a repeating unit represented by formula (II) (wherein Rrepresents a hydrogen atom or the like and Rrepresents a saturated aliphatic hydrocarbon group or the like), and a copolymerization ratio of the repeating unit represented by formula (II) is 90 wt % or more in the block chain (B) excluding the repeating unit represented by formula (I).