Ciba began to study melamine dyes in the 1920s. The performance of melamine dyes is better than all direct dyes, especially Chloramine Fast Blue 8G. It is a blue dye composed of intrinsic binding molecules containing an amine group and a yellow dye with a cyanuryl ring to form a green tone, that is, the dye has unsubstituted chlorine atoms, and under certain conditions , It can react to form covalent elements, but it is not recognized.
In 1923, Ciba discovered that acid-chlorotriazine dyes dye wool, so that high wet fastness can be obtained, so in 1953, Ciba Lambrill-type dyes were invented. At the same time, in 1952, Hirst also produced Remalan, a reactive dye for wool, based on the study of vinyl sulfone groups. But these two dyes were not very successful at the time. In 1956, Buneimen finally produced the first reactive dye Procion for cotton, which is now the dichlorotriazine dye.
In 1957, Benemen developed another monochlorotriazine reactive dye, Procion H.
In 1958, Hearst successfully used vinylsulfone-based reactive dyes to dye cellulose fibers, namely Remazol dyes.
In 1959, Sandoz and Cargill officially produced another reactive group dye, trichloropyrimidine. In 1971, on this basis, a reactive difluorochloropyrimidine dye with better performance was developed. In 1966, Ciba developed a reactive dye based on a-bromoacrylamide, which has good dyeing properties on wool and laid the foundation for the use of high fastness dyes on wool in the future.
In 1972, at Baidu, Benemen developed a dye with dual reactive groups based on monochlorotriazine reactive dyes, namely Procion HE. The dye has been further improved in terms of reactivity with cotton fiber and fixation rate.
In 1976, Bunaimen produced a class of dyes with phosphonic acid groups as active groups. It can form a covalent bond with cellulose fiber under alkali-free conditions, and is particularly suitable for bath paste printing, which is the same as disperse dye dyeing. The trade name is Pushian t. In 1980, based on vinyl sulfone Sumifix dye, Sumitomo Corporation of Japan developed vinyl sulfone And monochlorotriazine dual reactive dye.
In 1984, Nippon Kayaku Company developed a reactive dye called Kayasalon, which added a niacin substitute to the triazine ring. It can covalently react with cellulose fibers under high temperature and neutral conditions, and is especially suitable for high temperature and high pressure dispersion/reactive dye one-bath dyeing of polyester-cotton blended fabrics.
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