| 摘要 |
A polyester having a weight average molecular weight of 10,000 to 200,000, a hydroxyl value of 30 to 200 mgKOH/g, an acid value of not larger than 5 mgKOH/g and a glass transition temperature of 35 to 60° C., which is obtained by polycondencing a polycarboxylic acid ingredient comprising as a principal ingredient a polycarboxylic acid compound selected from alicyclic polycarboxylic acids and anhydrides thereof, which have a carboxyl group at each of adjacent two carbon atoms, with a polyhydric alcohol ingredient comprising as principal ingredients an alkylene glycol having 2 or 3 carbon atoms and a tetrahydric or higher-hydric alcohol. By incorporating a modifier for polymer, comprising this polyester as an effective ingredient, in a polymer, a polymer composition is obtained which gives a shaped article exhibiting improved adhesion to a thermosetting resin.
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