US 12,227,864 B2
Additive compound for uniform dyeing after anodic oxidation, additive solution having the additive compound, and dyeing method
Chih-Chien Hung, New Taipei (TW); Xiao-Gang Peng, Shenzhen (CN); Jian-Bin Wang, Chengdu (CN); Xing-Liang Zhang, Chengdu (CN); Chao Zhang, Chengdu (CN); Feng Liu, Chengdu (CN); and Peng Lan, Chengdu (CN)
Assigned to HONGFUJIN PRECISION ELECTRONICS (CHENGDU) Co., Ltd., Chengdu (CN)
Filed by HONGFUJIN PRECISION ELECTRONICS (CHENGDU) Co., Ltd., Chengdu (CN)
Filed on Jun. 2, 2022, as Appl. No. 17/830,523.
Claims priority of application No. 202111426508.4 (CN), filed on Nov. 27, 2021.
Prior Publication US 2023/0167570 A1, Jun. 1, 2023
Int. Cl. C25D 11/24 (2006.01)
CPC C25D 11/24 (2013.01) 9 Claims
OG exemplary drawing
 
1. An additive compound for dyeing, comprising:
a main agent, an auxiliary agent, a pH stabilizer, an antibacterial agent, and a moderating agent;
wherein the main agent comprises at least one of naphthalene sulfonic acid and methyl naphthalene sulfonic acid; the antibacterial agent comprises at least one of sorbic acid, fluconazole, itraconazole, Artemisia argyi, benzyl alcohol, salicylic acid, and boric acid; the moderating agent comprises at least one of sodium sulfate, sodium hydrochloride, sodium nitrate, magnesium sulfate, magnesium hydrochloride, magnesium nitrate, potassium sulfate, potassium salt, potassium nitrate, calcium sulfate, calcium hydrochloride, and calcium nitrate;
wherein the moderating agent is held separately from the main agent, the auxiliary agent, the pH stabilizer, and the antibacterial agent.