US 12,473,453 B2
Coating compositions containing phosphorus acid functional polyol polymers and coatings formed therefrom
Christopher A. Verardi, Pittsburgh, PA (US); Susan F. Donaldson, Allison Park, PA (US); Paul H. Lamers, Allison Park, PA (US); Karen Morow, Verona, PA (US); George William Mauer, III, Avon Lake, OH (US); and Steven Victor Barancyk, Wexford, PA (US)
Assigned to PPG Industries Ohio, Inc., Cleveland, OH (US)
Appl. No. 17/290,182
Filed by PPG Industries Ohio, Inc., Cleveland, OH (US)
PCT Filed Nov. 1, 2019, PCT No. PCT/US2019/059541
§ 371(c)(1), (2) Date Apr. 29, 2021,
PCT Pub. No. WO2020/093010, PCT Pub. Date May 7, 2020.
Claims priority of provisional application 62/754,188, filed on Nov. 1, 2018.
Prior Publication US 2021/0388228 A1, Dec. 16, 2021
Int. Cl. C09D 143/02 (2006.01); C09D 7/63 (2018.01)
CPC C09D 143/02 (2013.01) [C09D 7/63 (2018.01)] 15 Claims
 
1. A coating composition comprising:
(a) a phosphorus acid functional polyol polymer having an acid value within a range of greater than 7 mg KOH/g and 33 mg KOH/g or less, and a hydroxyl value within a range of from 60 to 200 mg KOH/g, wherein the phosphorus acid functional polyol polymer is obtained from reactants comprising: (i) a mono-ethylenically unsaturated phosphate ester of a polyether glycol, present in the phosphorus acid functional polyol polymer in an amount within a range of greater than 1.5 weight % and less than 10 weight %, based on the total solids weight of the reactants that form the phosphorus acid functional polyol polymer; (ii) an ethylenically unsaturated compound comprising hydroxyl functional groups, and (iii) an ethylenically unsaturated compound that is different from (i) and (ii);
(b) an aminoplast derived crosslinker reactive with the phosphorus acid functional polyol polymer; and
(c) a non-aqueous liquid medium,
wherein, if an external catalyst is present, the coating composition comprises less than 0.25 weight % of the external catalyst based on the total weight of the coating composition, and wherein the coating composition cures at a temperature of 100° C. or less, and wherein the coating composition is substantially free of additional resins and crosslinkers.