1995 For the production of an oligo - ester and of the production of a resin of polyester unsaturated using this ester oligo -

摘要

P the invention relates to a method of production of a resin of polyester unsaturated on the basis of an oligo - ester and of a dibasic acid unsaturated or its anhydride. / p & & p & according to the invention, react of isophthalic acid and of propylene oxide in the presence of a catalyst composed of an amine such as to form an oligo - ester, remove the volatile components of the oligo - ester obtained by heating at 180 - 300c, the oligo - ester resultant with a silica - alumina having a what adsorption, and it is react the oligo - ester thus treated with a dibasic acid unsaturated or its anhydride. / p & & p & the invention applies in particular for the preparation of resins. / p