103501-48-0Relevant academic research and scientific papers
Monoazo yellow acid dye and preparation method thereof
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Paragraph 0036-0047, (2021/02/06)
The invention discloses a monoazo yellow acid dye. The structural general formula of the monoazo yellow acid dye is as follows: m is a positive integer from 1 to 3; R is H, OH, NO2, Cl, Br or C1-C4 alkyl, and n is a positive integer from 1 to 3; Ar is that no sodium chloride or sodium hydrogen sulfate/sodium sulfate is generated in the process of preparing the monoazo yellow acid dye, according tothe method, the yield of the water-soluble monoazo yellow acid dye shown in the synthetic formula I can be higher than 96%, the absorption wavelength of the dye in water is 380-395 nm, the dye is bright green light yellow when dyed on wool fabric, and the defect that the variety of bright yellow acid dyes in the market is too single can be overcome.
Monoazo lake pigment and preparation method thereof
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Paragraph 0044-0050; 0055; 0056, (2021/02/06)
The invention discloses a monoazo lake pigment. The structural general formula of the monoazo lake pigment is one of the structures described in the description: M is one of Ca, Ba and Sr; R is H, OH,NO2, Cl, Br or C1 to C4 alkyl, and n is a positive integer from 1 to 3; and Ar is described in the description. According to the preparation method of the monoazo lake pigment, sodium chloride or sodium hydrogen sulfate/sodium sulfate can be prevented from being generated in the process of preparing the aromatic primary amine diazonium salt. Meanwhile, in the coupling reaction process, alkali containing a sodium element is not adopted, generation of inorganic sodium salt can be avoided in the manufacturing process of the monoazo lake pigment, and conditions are provided for clean treatment and comprehensive utilization of coupling reaction liquid.
