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:
Jan. 04, 1994
Filed:
Dec. 04, 1992
Toshiyuki Ishii, Sakai, JP;
Mitsuo Yamada, Suita, JP;
Motoi Tanimoto, Suita, JP;
Kenshiro Tobinaga, Kawanishi, JP;
Nippon Paint Co., Ltd., Osaka, JP;
Abstract
Oxazolidone ring-containing epoxy resins (a) produced by the reaction between a diglycidyl ether or ester and an organic diisocyanate are reacted with (b) a first active hydrogen compound such as mono- or diols, mono- or dicarboxylic acids in less than a stoichiometric amount in terms of the active hydrogen atom relative to the epoxy group, and then with (c) a second active hydrogen compound such as amines or sulfide-acid mixtures or polycarboxylic acids in a stoichiometric amount relative to the remaining epoxy group. The resulting hydrophilic modified resin has an oxazolidone ring-containing backbone terminated with an ionizable group. A water-borne paints are formulated from the hydrophilic modified resin by dispersing in an aqueous medium containing a crosslinker and a neutralizing agent.