The invention relates to an industrial production method of an environment-friendly yellow color
lake pigment 183 for plastics and belongs to the technical field of
pigment synthesis. The industrial production method comprises the following steps of: based on 2-amino-4, 5-dichlorobenzenesulfonic acid as a
raw material, carrying out alkali
dissolution-acidification salt forming reaction and
diazo-reaction to obtain a diazotization
emulsion, adding 1-(3'-sulfophenyl)-3-methyl-5-
pyrazolone to the diazotization
emulsion, and then carrying out
coupling reaction, color lake reaction and pigmentation treatment to obtain the yellow color
lake pigment 183. According to the industrial production method, a
coating agent is added to carry out
pigment surface treatment after the color lake reaction, so that the polarity on the
crystal surface of the
pigment is favorably reduced, the hydrophilicity of the pigment is reduced, and the manpower hour during unloading is shortened; and the yellow color
lake pigment 183 has the advantages of bulky block, bright appearance, easiness for
grinding and dispersing, high tinting strength and the like; and the obtained yellow color lake pigment 183 is good in application performance and has the
heat resistant temperature of being more than 300 DEG C, the tinting strength of more than 100% close to the standard in PE (
polyethylene) and PVC (
polyvinyl chloride) media and the tinting strength of being 108% higher than the standard in a PVC
sol medium.