PROCESS FOR THE PREPARATION OF AN ACID FUNCTIONAL POLYESTER RESIN

摘要

PROCESS FOR THE PREPARATION OF AN ACID FUNCTIONAL POLYESTER RESIN A process for the preparation of a linear tertiary aliphatic carboxyl functional polyester resin by reacting a) at least one compound A' comprising one monofunctional primary- or secondary hydroxyl group and/or at least one compound A" comprising one primary- or secondary hydroxyl group and one tertiary aliphatic carboxyl group and b) at least one aromatic or cycloaliphatic dicarboxylic acid compound B comprising two aromatic- or secondary aliphatic carboxyl groups or the anhydride thereof and c) at least one diol compound C comprising two aliphatic hydroxyl groups which may each independently be a primary or a secondary hydroxyl group and d) at least one dihydroxymonocarboxylic acid compound D comprising a tertiary aliphatic carboxyl group and two aliphatic hydroxyl groups, which may each independently be primary or secondary hydroxyl, the molar ratio of compounds A': A": B : C : D being M : N : X+Y+1 : X : Y, wherein M + N - 2 X ranges from 2 to 8 and Y ranges from 2-N to 8, at a temperature of from 100 to 240 .degree.C, until essentially all the non-tertiary carboxyl groups as initially present in the reaction mixture have been reacted.