| 摘要 |
A resin for hairdressing is obtained by: copolymerizing in a hydrophilic solvent a monomer (1), which is specific derivative of acrylic or methacrylic acid, and a monomer (3), which is a specific (meth)acrylic acid ester, and, optionally in addition, any of a monomer (2), which is another specific (meth)acrylic acid ester, and monomer (4), which is a hydrophilic ethylenically unsaturated monomer, and a monomer (5), which is an ethylenically unsaturated monomer other than the monomers (1) through (4); causing the copolymer thus formed to react in the state of a solution in a hydrophilic solvent with sodium or potassium haloacetate; removing any precipitate formed as by-product; and, if necessary, subjecting the copolymer solution thus obtained to an ion-exchange resin treatment thereby to remove ionic impurities.
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