| 摘要 |
PROBLEM TO BE SOLVED: To provide a fumaric acid diester-based copolymer excellent in adhesiveness to a substrate while maintaining good properties of a cured film, such as curability, weatherresistance, and preferably used as a curing agent for coatings, ink, adhesives, printing materials and the like. SOLUTION: The fumaric acid diester-based copolymer is a copolymer including a constitutive unit (a1) derived from a fumaric acid diester monomer, a constitutive unit (a2) derived from a styrenic monomer, a constitutive unit (a3) derived fromα,β-unsaturated monocarboxylic acid, and a constitutive unit (a4) derived from (meth)acrylic acid hydroxyalkyl ester, and having a weight-average molecular weight of 5,000-60,000. Further, the proportion of the constitutive unit (a3) is set to be 220-1,130 g/mol molar equivalent of a carboxy group in the copolymer. COPYRIGHT: (C)2010,JPO&INPIT
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