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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.:

US 12594598 B1

PDFFull Text
Date of Patent:
Apr. 07, 2026

Filed:

Aug. 06, 2021

Copper fine particle dispersion

Applicant:

Kao Corporation, Tokyo, JP;

Inventors:

Takaaki Eyama, Wakayama, JP;

Osamu Takiguchi, Wakayama, JP;

Tomohide Yoshida, Wakayama, JP;

Assignee:

KAO CORPORATION, Tokyo, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Tri V Nguyen

Int. Cl.
CPC ...
B22F 1/0545 (2022.01); B22F 1/052 (2022.01); B22F 1/054 (2022.01); B22F 1/107 (2022.01); B22F 7/04 (2006.01); C09J 9/02 (2006.01); C09J 11/04 (2006.01);
U.S. Cl.
CPC ...
B22F 1/0545 (2022.01); B22F 1/052 (2022.01); B22F 1/056 (2022.01); B22F 1/107 (2022.01); B22F 7/04 (2013.01); C09J 9/02 (2013.01); C09J 11/04 (2013.01); B22F 2007/047 (2013.01); C09J 2203/326 (2013.01); C09J 2301/408 (2020.08);
Abstract

A copper fine particle dispersion including copper nanoparticles A dispersed in the copper fine particle dispersion with a polymer B, and a dispersion medium C. The polymer B contains a constitutional unit derived from a carboxy group-containing monomer (b-1) and a polyalkylene glycol segment-containing monomer (b-2). A content of the polyalkylene glycol segment in the polymer B is not less than 55% by mass and not more than 97% by mass. An acid value of the polymer B is not less than 20 mgKOH/g and not more than 250 mgKOH/g. The dispersion medium C includes at least one compound selected from the group consisting of a (poly)alkylene glycol, a (poly)alkylene glycol derivative, a terpene alcohol, glycerin and a glycerin derivative.

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