An investigation has been made on the emulsifying power of surface active agents for hydrophobic carriers,
o-dichlorobenzene and 1, 2, 4-trichlorobenzene, and the influence of emulsifiers on the dyeability of two disperse dyes, C. I. Disperse Red 1 and C. I. Disperse Red 15, on polyester fibers at 80 and 95°C.
1, 2, 4-Trichlorobenzene was more difficult to emulsify, but a little more effective as dyeing accelerent than
o-dichlorobenzene. POE nonyl phenyl ether (P=25) had an excellent emulsifying power but inhibited the absorption of dyes.
Triethanolamine salts of dodecylbenzene sulfonate and lauryl sulfate were better emulsifiers than diethanolamine, monoethanolamine and sodium salts. Of the triethanolamine salts of sulfonated products, the emulsifying power ranked in the order of dodecylxylene, dodecyltoluene, dodecylbenzene.
Among the emulsifiers examined for the dyeing of polyester fibers with
o-dichlorobenzene or 1, 2, 4-trichlorobenzene, triethanolamine salt of dodecylxylene sulfonate was most suitable without affecting the dyeability of disperse dyes.
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