Benzothiazole dye monomeric compound and disperse dye
A technology of benzothiazoles and dye monomers, applied in the direction of azo dyes, organic dyes, monoazo dyes, etc., to achieve uniform color tone, good dyeing depth, and wide dyeing pH range
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Example Embodiment
[0032] Example 1:
[0033] Put 21.8g (0.2mol) of m-aminophenol, 72g (1mol) of acrylic acid, 100g of water into a 500ml container, heat up to 90℃, keep for 10h, cool down, add 200g of methanol at the same time, keep it at 0-5℃ and stir for 12h to crystallize Filter and wash with 50 g methanol. After washing and drying, the dicarboxylic acid product a is obtained.
[0034]
[0035] Put 68.5 g (0.5 mol) bromoacetone, 11.6 g of soda ash, and dicarboxylic acid product a (100.3 g, 0.1 mol) into a 500 ml container, raise the temperature to 80°C, put in 5 g KI, and keep it warm for 12 hours. Cool down to 40°C, add 200g of water, crystallize and filter to obtain coupling component A.
[0036]
[0037] Diazotization: Add 50g of 98% concentrated sulfuric acid, 80g of 85% phosphoric acid to a 250ml container, add 35g (0.11mol) of 40% nitrosyl sulfuric acid, cool to 0~5℃, control 3~4h and add 19.5 g(0.1mol) 2-amino-6-nitrobenzothiazole, keep it at 0~5℃ for 3h after adding.
[0038] Coupling: Pu...
Example Embodiment
[0042] Example 2:
[0043] Similar to the preparation method of the coupling raw materials described in Example 1, the bromoacetone is replaced with an equimolar amount of 2-bromoacetophenone to obtain the coupling component B.
[0044]
[0045] Then according to the dye synthesis method in Example 1, the above coupling component B is coupled with the diazonium solution of 2-amino-6-nitrobenzothiazole to obtain the finished dye I-2, λ max (DMF)=550nm, the polyester fabric dyed by high temperature and high pressure method is red, the fastness is good, the washing fastness is up to 5, and the ironing and sublimation fastness is above 4~5.
[0046]
Example Embodiment
[0047] Examples 3~12:
[0048] According to the preparation methods of Examples 1 to 2, using different coupling raw materials, the dyes with the structure shown in Table 1 below can be prepared respectively (the polyester dyeing method is the same as that of Example 1).
[0049] Table 1
[0050]
[0051]
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