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Stability of waterborne nanoscale pigment red 122 dispersion that used copolymer of styrene and maleic acid as modification reagent was affected greatly by additives. In this article, the effects of pH value, ion intensity, and alcohols on centrifugal stability and stability to temperature were investigated. The results showed that pigment 122 dispersion with high centrifugal stability was obtained and the particle size was changed small when treated with different temperature at pH value in the range of 7.70∼8.96. Centrifugal stability and stability to temperature were decreased with increasing concentration electrolyte, especially with AlCl3 and MgCl2. Alcohols had no negative effect on centrifugal stability and stability to temperature of waterborne nanoscale pigment red 122 dispersion.
This work is supported by the National 863 Projects (2002AA327120), China National Natural Science Foundation (20474025, 50173012), Key Laboratory for Eco‐Textile of Ministry of Education fund (KLET0603), and Jiangnan University fund (20600021050648). We also thank Jiangnan University of supporting in the course of the research.