Process for scouring and dyeing synthetic fibers in one-bath with a pH-adjusting agent
AssigneeMeisei Chemical Works, Ltd.
InventorsKiyoshi Shirasawa, Akira Hashimoto, Hirotugu Kodama, Ichiro Osawa, Yasunori Ito, Masazi Yamasaki
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Abstract
According to the process of the invention, scouring and dyeing synthetic fibers can be carried out in one-bath. The process comprises the steps of preparing a dyeing solution comprising an alkalizing agent and a pH adjusting agent being able to generate acids by heating, putting unscoured synthetic fibers in said dyeing solution and then heating to dye said fibers at high temperature. The dyeing solution may comprise a surface active agent.
Claims3
A process for scouring and dyeing synthetic fibers in one-bath, which comprises the steps of preparing a dyeing solution comprising a dye, a surface active agent selected from the group consisting of nonionic surface active agents and anionic surface active agents, an alkalizing agent and a pH adjusting agent being able to generate acids when by heating, said pH adjusting agent selected from the group consisting of mono (or di or tri)-chloro (or bromo) alkylalcohols (C.sub.2 to C.sub.5), 3-chloro-1,2-propylene glycol, 2,2,3-tri-chlorobutane-1,1-diol, dibromoneopentyl glycol, 1-bromo-3-chloro-2-propanol, epichlorohydrin, .beta.-methyl epichlorohydrin, epibromohydrin and mono-, di- or poly-carboxylic esters produced by the reaction of formic acid, acetic acid, propionic acid, acrylic acid, methacrylic acid, tiglic acid, benzoic acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, methylsuccinic acid, malic acid, tartaric acid, phthalic acid, citric acid, tricarballylic acid, polyacrylic acid or polymethacrylic acid with methyl alcohol, ethyl alcohol, propyl alcohol, butyl alcohol, ethylene glycol, diethylene glycol, propylene glycol or dipropylene glycol;
- putting unscoured synthetic fibers in said dyeing solution and then heating to dye said fibers at a temperature of 120.degree. C. to 140.degree. C.
Dependencies are inferred from the claim text.