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:
May. 18, 2010
Filed:
Aug. 26, 2008
Sadano Okuda, Tokyo, JP;
Tsutomu Nio, Tokyo, JP;
Hiroshi Hayashi, Tokyo, JP;
Shinichiro Shimura, Tokyo, JP;
Takayuki Shimizu, Chiba, JP;
Masahiko Abe, Chiba, JP;
Hideki Sakai, Chiba, JP;
Kenichi Sakai, Chiba, JP;
Sadano Okuda, Tokyo, JP;
Tsutomu Nio, Tokyo, JP;
Hiroshi Hayashi, Tokyo, JP;
Shinichiro Shimura, Tokyo, JP;
Takayuki Shimizu, Chiba, JP;
Masahiko Abe, Chiba, JP;
Hideki Sakai, Chiba, JP;
Kenichi Sakai, Chiba, JP;
Riso Kagaku Corporation, Tokyo, JP;
Abstract
A water-in-oil (W/O) emulsion ink which is suitable for use in inkjet printing and is low in viscosity and superior in storage stability is provided. The ink comprises an oil phase and a water phase emulsified in the oil phase using a nonionic surfactant, in which the water phase contains a salt of at least one metal selected from potassium or calcium. The metal salt is preferably a calcium salt, and particular preferably calcium chloride. The nonionic surfactant is preferably a polyglycerin fatty acid ester, and particularly preferably an esterification product of a polyglycerin and a hydroxy fatty acid. Preferably, the ink comprises 40-99 mass % of the oil phase and 60-1 mass % of the water phase, and contains a polyglycerin fatty acid ester in an amount of 0.5-40 mass % based on the total of the ink.