초록

Low energy-curable coatings compositions of (1) an epoxide, (2) a polyisocyanate and as a catalyst and initiator a mixture of (3) a stannous salt and (4) a liquid polycarboxylic acid produced by the reaction of a polycaprolactone and an intramolecular polycarboxylic acid anhydride.

대표청구항 ▼

A high solids liquid coating composition comprising (I) from 5 to 60 weight percent of an epoxide, (II) an organic polyisocyanate, (III) from 4 to 60 weight percent of a liquid polycarboxylic acid and (IV) from 0.1 to 10 weight percent of a stannous salt catalyst; said percentages based on the combi

A high solids liquid coating composition comprising (I) from 5 to 60 weight percent of an epoxide, (II) an organic polyisocyanate, (III) from 4 to 60 weight percent of a liquid polycarboxylic acid and (IV) from 0.1 to 10 weight percent of a stannous salt catalyst; said percentages based on the combined weight of (I), (II), (III) and (IV); wherein said conponent (III) comprises the reaction product mixture produced by the reaction of (i) a polycaprolactone polyol and (ii) from 0.5 to 1 carboxylic acid anhydride equivalent for each hydroxyl equivalent present in said polycaprolactone polyol of an intramolecular anhydride of a polycarboxylic acid; wherein said component (IV) is a stannous acylate of a mono- or dicarboxylic acid having from 1 to 54 carbon atoms or a stannous alkoxide having from 1 to 18 carbon atoms in the alkoxide group; and wherein said component II is present in a concentration such that the epoxide/isocyanato equivalent ratio is 0.2 to 1.5.