[C:1](OCC(C)C)(=O)[CH:2]=[CH2:3].[C:10]([O:14]CC)(=[O:13])[CH:11]=[CH2:12].C(O)(=O)C=C.[CH2:22]([CH:24]([CH2:34][CH2:35][CH2:36][CH3:37])[C:25](OOOC(C)(C)C)=O)[CH3:23].[C:38]1([CH3:45])[C:39]([CH3:44])=[CH:40]C=C[CH:43]=1>C(O)CCC>[CH3:44][CH:39]([C:38]1[CH2:45][CH2:25][CH:24]2[C:34](=[CH:35][CH2:36][CH:37]3[C:11]([C:10]([OH:14])=[O:13])([CH3:12])[CH2:3][CH2:2][CH2:1][C:22]32[CH3:23])[CH:43]=1)[CH3:40]A mixture of 64 parts of xyylene and 16 parts of n-butanol was heated to 100° C. in the same flask as used in Production Example 1. To this was added dropwise a mixture of 20.0 parts of isobutyl acrylate, 50.9 parts of ethyl acrylate, 14.1 parts of acrylic acid, 15.0 parts of NK ESTER M-90G and 3 parts of t-butylperoxy 2-ethylhexanoate at a constant rate over 4 hours. After the addition, the mixture was kept at the same temperature for 30 minutes. Then a solution of 0.2 parts of t-butylperoxy 2-ethylhexanoate in 16 parts of xylene and 4 parts of n-butanole was added dropwise at a constant rate over 30 minutes. Thereafter the reaction mixture was kept at the same temperature for 2 hours. A resin solution called Varnish F having 50.0% solids, a viscosity of 7.5 poise and a resin acid number of 110 was obtained.
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