| abstract |
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. |