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:
Mar. 07, 2000
Filed:
Aug. 04, 1997
Applicant:
Inventor:
Kengo Ito, Miyagi, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09C / ; C09D / ;
U.S. Cl.
CPC ...
106486 ; 106416 ; 106487 ; 106468 ; 106 316 ; 106 3185 ; 106 3186 ;
Abstract
The present invention provides a pigment ink which can be produced through a simplified procedure and enables coloring as good as a dye ink. The pigment ink mainly consists of an intercalation compound such as a mineral of the montmorrilonite group and the hydrotalcite group, wherein at least a part of interstitial ions in the intercalation compound is substituted by dye ions having a polarity opposite to that of the interstitial ions. The pigment is dispersed in water together with a dispersion agent and a wetting agent so as to obtain the pigment ink. Remaining interstitial ions not substituted by the dye ions are substituted by hydrophilic ions.