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Abstract�� Copolymer of styrene and acrylic acid,polymeric dispersant for waterborne pigments systems,was synthesized.The structure of the obtained copolymer was determined by IR and NMR.The influence of reaction parameters,including molar ratio of styrene to acrylic acid,reaction temperature,quantity of chain transfer agent,on the dispersibility of the polymer was investigated.The polymer was prepared by reacting styrene with acrylic acid in molar ratio of 1��1.3��1 in the presence of 4%��6% of chain transfer agent at 90.0 �桪110.0 ��.The special viscosities of the polymers with different molecular weights were detected.The polymer had preferable dispersibility when its special viscosity was 15��16.C.I.Pigment Yellow 3 was dispersed by the above dispersant and the similar Japanese product J-68 respectively.The results indicated that the dispersibility of the the prepared dispersant is superior to that of J-68.

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Received 2006-07-15; published 2006-07-15

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��;��;��;.ˮ��Ծۺ��Ϸ�ɢ��[J]. ��ѧ��ҵ�빤��, 2006,23(4): 342-344

ZHANG You-lan~1,HUANG Pei-jun~2,WANG Shi-rong~1.Synthesis of Pigment Dispersant for Polymer Waterborne System[J]. Chemcial Industry and Engineering, 2006,23(4): 342-344