US 12,331,215 B2
Powder coating resins from C12—C23 diacids
Jeffrey T. Cafmeyer, Columbus, OH (US); and Daniel B. Garbark, Blacklick, OH (US)
Assigned to Battelle Memorial Institute, Columbus, OH (US)
Appl. No. 16/965,003
Filed by Battelle Memorial Institute, Columbus, OH (US)
PCT Filed Jan. 25, 2019, PCT No. PCT/US2019/015234
§ 371(c)(1), (2) Date Jul. 26, 2020,
PCT Pub. No. WO2019/147994, PCT Pub. Date Aug. 1, 2019.
Claims priority of provisional application 62/622,178, filed on Jan. 26, 2018.
Prior Publication US 2021/0054230 A1, Feb. 25, 2021
Int. Cl. C09D 177/12 (2006.01); C08G 69/44 (2006.01); C09D 5/03 (2006.01)
CPC C09D 177/12 (2013.01) [C08G 69/44 (2013.01); C09D 5/03 (2013.01)] 5 Claims
 
1. A powder coating resin comprising:
a first dicarboxylic acid terminated polymer having carboxylic acid groups on both ends and having ester and amide functionality comprising the reaction product of a C18 diacid with an amine alcohol, and optionally a diacid having less than 18 carbon atoms; or
a first acetoacetate terminated polyol comprising the reaction product of a first intermediate polyol with acetoacetic acid or an ester thereof, and wherein the first intermediate polyol comprises the reaction product of a C18 diacid with an amine alcohol, and optionally a diacid having less than 18 carbon atoms;
wherein the molecular weight of the resin is in the range of 475 g/mol to 10,000 g/mol, and wherein the first carboxylic acid terminated polymer or the first acetoacetate terminated polyol has an acid value in the range of 20-90 mg KOH/g; a peak melting point of 90-130° C.; and a melt viscosity of less than 4000 mPa's (4000 centipoise) at 125° C.;
the resin being in the form of a free-flowing powder.