Powder coating resins from C12—C23 diacids
AssigneeBattelle Memorial Institute
InventorsJeffrey T. Cafmeyer, Daniel B. Garbark
Life of this patent
Estimating the term…
Abstract
Powder coating resins and coatings made using the powder coating resins are described. The powder coating resins are based on the use of C12 to C23 diacids. The C12 to C23 diacids are reacted with a reactant having an alcohol functionality and an amine functionality to form a carboxylic acid terminated polymer having ester and amide functionality. Alternatively, the C12 to C23 diacids are reacted with a reactant having an alcohol functionality and an amine functionality to form an intermediate polyol, which is then reacted with acetoacetic acid or an ester thereof to form an acetoacetate-terminated polymer.
Claims5
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.
Dependencies are inferred from the claim text.