CARBOXYL FUNCTIONAL CURABLE POLYESTERS CONTAINING TETRA-ALKYL CYCLOBUTANEDIOL

摘要

A curable polyester resin composition containing residues of:
a) polyhydroxyl compounds that include:
(i) 2,2,4,4-tetraalkylcyclobutane-1,3-diol (TACD) compounds, and(ii) polyhydroxyl compounds other than TACD, and(b) polycarboxylic acid compounds that include:
(i) polycarboxylic acid compounds, a derivative of polycarboxylic acid compound other than (bii), or a combination thereof, and(ii) a polycarboxylic anhydride compound;

wherein the curable polyester resin has an acid number ranging from about 20 to about 120 mg KOH/g, a hydroxyl number ranging from greater than 0 to about 100 mg KOH/g, and an acid number:hydroxyl (AN:OH) number ratio of at least 0.5:1. The curable polyester resin can be dispersed in water or a solvent and is suitable for waterborne or solventborne coating compositions and powder coating applications. Phenolic based crosslinking coating compositions that contain these curable polyester resins are curable at elevated temperatures.

主权项

1. A composition comprising a curable polyester resin, said polyester resin comprising the residues of:
a) polyhydroxyl compounds comprising:
(i) a 2,2,4,4-tetraalkylcyclobutane-1,3-diol (TACD) compound, and(ii) a polyhydroxyl compound other than TACD, and b) polycarboxyl compounds comprising:
(i) a polycarboxylic acid compound, a derivative of polycarboxylic acid compound other than (bii), or a combination thereof, and(ii) a polycarboxylic anhydride compound; wherein said curable polyester resin has an acid number ranging from about 20 to about 120 mg KOH/g, a hydroxyl number ranging from greater than 0 to about 100 mg KOH/g, and an acid number:hydroxyl number ratio (AN:OH) of at least 0.5:1.