Patent ID: 6388024
Filing Date: 2002-05-14
Classification: C08G,C09D,Y10S

Abstract:
Carboxyl functional polyester resins comprising the reaction product of:a) an acid moeity comprising an A1 compound represented by the formula: â€ƒwherein a&gE;1, R1 and R2 each may represent an alkyl group having from 1 to 4 carbon atoms or wherein R1 and R2 may form, together with the group â€”CHâ€”(CH2)aâ€”CHâ€”, a cycloalkyl group, and mixed with smaller molar amounts of A2 monoglycidyl esters of &agr;,&agr;-branched carboxyl acids containing from 5 to 19 carbon atoms in the acid moiety, b) a compound B comprising one primary- or secondary hydroxyl group and one tertiary aliphatic carboxyl group, c) optionally one diol compound C comprising two hydroxyl groups which may each independently be a primary or a secondary hydroxyl group and which compounds do not contain aromatic unsaturation; d) optionally a dihydroxymonocarboxylic acid compound D, comprising a tertiary aliphatic carboxyl group and two aliphatic hydroxyl groups, which may each independently be primary or secondary hydroxyl; and e) optionally a trihydroxyalkane (E1) or tetrahydroxyalkane (E2), the molar ratio of compounds A1:(C+A2):B:D:E1:E2 corresponding to (X+Y+1):Y:2:X:Q:P, wherein X ranges from 0 to 8, Y ranges from 1 to 8, Q ranges from 0 to 3 and wherein P ranges from 0 to 3, said reaction proceeding at a temperature of from 100 to 240Â° C. until essentially all the hydroxyl groups as initially present in the reaction mixture have been reacted.