US 12,435,227 B2
Marker inks and methods of preparing the marker inks
Ding He, Shenzhen (CN); Zhi Liu, Shenzhen (CN); Xufeng Yang, Shenzhen (CN); Dengwu Wu, Shenzhen (CN); and Guohui Yang, Shenzhen (CN)
Assigned to SHENZHEN THOUSANDSHORES TECHNOLOGY CO., LTD., Shenzhen (CN)
Filed by SHENZHEN THOUSANDSHORES TECHNOLOGY CO., LTD., Guangdong (CN)
Filed on Dec. 15, 2024, as Appl. No. 18/981,628.
Claims priority of application No. 202410254467.2 (CN), filed on Mar. 6, 2024.
Prior Publication US 2025/0282966 A1, Sep. 11, 2025
Int. Cl. C09D 11/17 (2014.01)
CPC C09D 11/17 (2013.01) 20 Claims
OG exemplary drawing
 
1. A marker ink, comprising: an azo-metal complex dye, a film-forming resin, and ethanol, wherein the azo-metal complex dye is represented by a formula:

OG Complex Work Unit Chemistry
where R1, R2, and R3 are polar groups, M is a metal ion, mXn− is an optionally present anion, and when mXn− is present, n and m are positive integers.