| 摘要 |
<p>3-12850/+ Process for the preparation of crosslinked, unsaturated polymers and the polymers thus obtained. Novel crosslinked unsaturated polymers, which have better properties than conventional crosslinked unsaturated polymers are obtained by reacting a .beta.-aminocrotonic acid ester, .beta.-aminocrotononitrile or .beta.-aminocrotonamide with a diisocyanate or polyisocyanate and a polyol, for example at temperatures of between 50 and 180.degree.C.</p> |
