PURPOSE: To obtain a cross-linkable polymer composition capable of providing a cross-linked body more excellent in unshrinking property, hue, etc., without using any catalyst and useful as a molding material, etc., by blending a copolymer containing an exomethylene cyclic carbonate structure with an aliphatic polyamine.
CONSTITUTION: The composition contains (A) a copolymer having a cyclic carbonate group, expressed by the formula [A is ethylenic unsaturated monomer unit copolymerizable with an exomethylene cyclic carbonate; l is 1 or 2; m and n represent mole fraction and m/n is (5/95) to (95/5)] and having 1000-150000 number-average molecular weight and (B) an aliphatic polyamine (e.g. ethylenediamine), preferably so that an amount of the component B may be 25-50mol% based on the exomethylene cyclic carbonate unit of the component A. Furthermore, the component A is obtained by subjecting, e.g. 5-methylene-1, 3-dioxan-2-one to radical copolymerizaton with methyl methacrylate.
TAKADA TOSHIKAZU
TAKITANI MASASHI
YOSHIDA HARUO
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