617722-70-0Relevant articles and documents
Active red dye preparation method
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Paragraph 0009; 0010; 0065; 0066; 0067, (2016/12/12)
The present invention discloses an active red dye preparation method comprising the following steps: (1) a sulfonated para-ester is obtained by successive sulfonation, hydrolysis, dilution and salting-out of p-hydroxyethyl sulfone acetanilide as a starting material; (2) the acid number of the sulfonated para-ester is detected, according to the detected acid number, hydrochloric acid is added, and after the reaction is completed, a sulfonated para-ester diazonium salt is obtained; (3) a first-coupling fluid is obtained by first coupling of the sulfonated para-ester diazonium salt obtained by the step (2) and a J acid; and (4) an active red dye is obtained by secondary coupling of the first-coupling fluid obtained by the step (3) and a cresidine para-ester diazonium salt and processing. According to the method, on the basis of the acid number of the prepared sulfonated para-ester diazonium salt, the addition amount of the hydrochloric acid is determined, and the obtained active red dye has better strength.
Reactive red dye composition and application thereof
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Page/Page column 5; 6, (2008/12/05)
The present invention provides a reactive red dye composition comprising (A) 3% to 97% by weight of a reactive azo dye of the following formula (I), wherein W, D1 and D2 are defined the same as the specification; and (B) 97% to 3% by
