| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing salt of (meth)acrylic acid-unsaturated dibasic acid copolymer in a high yield. SOLUTION: This method has the following step 1 and step 2. The step 1: a step of reacting (A) an unsaturated dibasic acid with (B) at least one selected from the group consisting of ammonia an amine, these salts and a quaternary ammonium salt at a rate of component (A)/component (B) (molar rate)=100/30 to 100/70. The step 2: a step of adding (C) acrylic acid or methacrylic acid to a resultant reaction liquid from the step 1 and polymerizing them in the presence of a chain transfer agent. COPYRIGHT: (C)2006,JPO&NCIPI
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