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:
Jul. 01, 2008
Filed:
Aug. 27, 2004
Jong-in Lee, Suwon-si, KR;
Seung-min Ryu, Yongin-si, KR;
Su-aa Jung, Suwon-si, KR;
Samsung Eletronics Co., Ltd., Suwon-Si, KR;
Abstract
A self-dispersible coloring agent represented by formula (II) below is prepared by incorporating a hydrophilic group into a coloring agent through a reaction of a hydrophilic group-containing halide represented by formula (I) below and the coloring agent in the presence of a Lewis acid catalyst:X-L-R  (I)(the coloring agent)-L-R  (II) wherein L represents a single bond or —C(═O)—; Ris selected from the group consisting of a substituted or unsubstituted C-Calkyl group containing a hydrophilic group, a substituted or unsubstituted C-Caryl group containing a hydrophilic group a substituted or unsubstituted C-Cheteroaryl group containing a hydrophilic group and a substituted or unsubstituted C-Carylalkyl group containing a hydrophilic group; and X is one of: —F, —Br, —I and —Cl. may be obtained conveniently through a one-step process. The ink composition containing the self-dispersible coloring agent provides effective long-term storage stability and dispersion stability using a one-step process.