US 11,718,119 B2
Coating composition for printing paper
Beverly Chou, San Diego, CA (US); Xiaoqi Zhou, San Diego, CA (US); Xulong Fu, San Diego, CA (US); Jake Thomas, San Diego, CA (US); and Tao Chen, San Diego, CA (US)
Assigned to Hewlett-Packard Development Company, L.P., Spring, TX (US)
Appl. No. 17/439,205
Filed by HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P., Spring, TX (US)
PCT Filed Oct. 11, 2019, PCT No. PCT/US2019/055830
§ 371(c)(1), (2) Date Sep. 14, 2021,
PCT Pub. No. WO2021/071505, PCT Pub. Date Apr. 15, 2021.
Prior Publication US 2022/0154402 A1, May 19, 2022
Int. Cl. B41M 5/52 (2006.01); B41M 5/00 (2006.01); D21H 19/40 (2006.01); C08K 3/22 (2006.01); C08K 3/34 (2006.01)
CPC B41M 5/5218 (2013.01) [B41M 5/0017 (2013.01); D21H 19/40 (2013.01); C08K 3/22 (2013.01); C08K 3/346 (2013.01); C08K 2003/2227 (2013.01)] 19 Claims
 
1. A coating composition for a base paper, comprising:
about 5.0 wt % to about 50 wt % of a porous clay comprising an alumina-silicate that is acid etched; and
about 0.1 wt % to about 10% wt % of an ink pigment fixation agent comprising a metallic salt;
wherein the porous clay has a surface area from about 100 m2/g to about 400 m2/g;
and wherein the coating composition has a pH of from 5 to 8.