RESIN BASED ON RAMIFIED HYDROXYL-FUNCTIONAL POLYESTER AND UTILIZATION THEREOF IN AQUEOUS CROSSLINKING COMPOSITIONS Russian patent published in 2005 - IPC

FIELD: polymer materials.

SUBSTANCE: invention relates to polyester-based resins and utilization thereof in two-component compositions and water-based coating compositions and provides a resin based on ramified hydroxyl-functional polyester with average hydroxyl functionality >2, hydroxyl number 25-300 mg KOH/g and average number molecular mass 500-3000, which resin contains poly(alkylene oxide) groups and optionally sulfonate groups. Resin is characterized by that it contains reaction product of (i) carboxylic acid mixture containing 50-80 mol % m- and/or p-aromatic and/or cycloaliphatic monocarboxylic acid containing more than 6 carbon atoms and, optionally, acid containing three or more functional groups; and (ii) alcohol mixture including aliphatic diol containing at least 4 carbon atoms, C₁-C₄-alkoxypolyalkyleneoxyde glycol and/or C₁-C₄-alkoxypolyalkyleneoxyde-1,3-diol with average number molecular mass 500-3000 and, optionally, polyatomic alcohol containing 3 or more functional groups. Resin is further characterized by carboxylic number ≤20 mg KOH/g (less than 0.357 mequ COOH groups per 1 g polymer) and, optionally, sulfonate number ≤4 mg KOH/g (less than 0.070 mequ sulfonate groups per 1 g polymer), wherein acid groups are at least partly neutralized. Resin is used as a base for preparing aqueous dispersion, aqueous cross-linkable binding composition, and aqueous coating composition.

EFFECT: facilitated removal of water from resulting coating layer and accelerated setting velocity for binding composition.

14 cl, 7 tbl, 82 ex