| abstract |
PURPOSE: To obtain the title low-viscosity dispersant having excellent dispersion stability, comprising a copolymer (neutralized substance thereof) of (meth)acrylic ester-based monomer and (meth)acrylic acid (salt) using diphenylmethylpentene as a chain transfer agent. n CONSTITUTION: The objective dispersant comprising 2,4 diphenyl-4- methyl-1-pentene as an essential chain transfer agent and a copolymer of preferably 1-30wt.% (meth)acrylic ester based monomer and preferably 10-30wt.% (meth)acrylic acid (salt) and/or neutralized substance (preferably 1,000-300,000 average molecular weight). The amount of the chain transfer agent is preferably 0.01-20wt.%. n COPYRIGHT: (C)1991,JPO&Japio |