| 摘要 |
<p>PCT No. PCT/KR90/00023 Sec. 371 Date Jun. 8, 1992 Sec. 102(e) Date Jun. 8, 1992 PCT Filed Dec. 28, 1990 PCT Pub. No. WO91/09886 PCT Pub. Date Jul. 11, 1991.The present invention relates to a process for the preparation of heat resistant and transparent acrylic resin which is characterized by imidizing methacrylic resin in a solution with primary amine or the ammonia compounds generating primary amine in the presence or absence of catalyst and under a suitable temperature condition. The reaction product is the compound of formula (I) comprising more than 10% by weight of imidized structure unit. Formula (I) wherein R1, R2 and R3 independently represent a hydrogen atom, or unsubstituted and substituted C1 to C20 alkyl, cycloalkyl, aryl, aralkyl, alkaryl, or mixtures thereof.</p> |
