US 12,305,055 B2
Method for manufacturing electrically conductive member
Tomohide Yoshida, Wakayama (JP); and Kosuke Muto, Sakai (JP)
Assigned to KAO CORPORATION, Tokyo (JP)
Appl. No. 17/605,923
Filed by KAO CORPORATION, Tokyo (JP)
PCT Filed Apr. 26, 2019, PCT No. PCT/JP2019/018071
§ 371(c)(1), (2) Date Oct. 22, 2021,
PCT Pub. No. WO2020/217491, PCT Pub. Date Oct. 29, 2020.
Prior Publication US 2022/0220330 A1, Jul. 14, 2022
Int. Cl. B41J 2/00 (2006.01); B41M 3/00 (2006.01); C09D 11/033 (2014.01); C09D 11/037 (2014.01); C09D 11/107 (2014.01); C09D 11/322 (2014.01); C09D 11/36 (2014.01); C09D 11/52 (2014.01); H01B 1/22 (2006.01); B05D 1/26 (2006.01); B05D 5/12 (2006.01)
CPC C09D 11/52 (2013.01) [B41M 3/006 (2013.01); C09D 11/033 (2013.01); C09D 11/037 (2013.01); C09D 11/107 (2013.01); C09D 11/322 (2013.01); C09D 11/36 (2013.01); H01B 1/22 (2013.01); B05D 1/26 (2013.01); B05D 5/12 (2013.01); B41J 2/00 (2013.01)] 11 Claims
 
1. A method for producing an electrically conductive member, the method comprising applying an electrically conductive ink comprising a metal fine particle dispersion to a substrate to form electrically conductive images on the substrate under environments in a temperature range of not lower than 5° C. and not higher than 45° C., thereby obtaining the electrically conductive member,
wherein the metal fine particle dispersion comprises metal fine particles (a) dispersed therein with a polymer B;
a metal constituting the metal fine particles (a) is silver,
an average particle size of the metal fine particles (a) in the electrically conductive ink is not less than 15 nm and not more than 35 nm,
the polymer B is a water-soluble vinyl polymer comprising a constitutional unit derived from (meth)acrylic acid and a constitutional unit derived from a polyalkylene glycol monoester of (meth)acrylic acid,
a glass transition temperature of the polymer B is not higher than a temperature at which the electrically conductive images are formed on the substrate,
the glass transition temperature of the polymer B is not lower than −100° C. and not higher than 10° C.; and
the substrate has a porous surface, and
wherein the electrically conductive ink comprises monohydroxyacetone and acetic acid, and
a content of the monohydroxyacetone in the electrically conductive ink is not less than 0.05% by mass and not more than 1% by mass.