| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject composition useful for a bonding agent excellent in solvent solubility, etc., optical member utilizing its colorless transparency, and e.g. electrode binder for nonaqueous electrolyte secondary cells by copolymerizing dimer acid and also by setting the resultant logarithmic viscosity no less than a specific value. SOLUTION: This objective composition with a logarithmic viscosity of >=0.1 dl/g is obtained by dissolving into a polymerization solvent, trimellitic anhydride containing pref. cyclohexane dicarboxylic acid as part of an acid component, dimer acid of >=1 wt.%, diamine or diisocyanate containing pref. dicyclohexylmethane residue and/or isophorone residue as an amine residue, and, if the case may be, at least one selected from the group of epoxy resin, melamine compound and isocyanate compound, and by heating the resultant solution at 50 to 220 deg.C under stirring. |
