Abstract: The present invention provides crosslinked polyester compositions for use in coating metal. The polyester comprises residues of at least one aromatic acid; 2,2,4,4-tetramethyl-1,3-cyclobutanediol and at least one polyol different than 2,2,4,4-tetramethyl-1,3-cyclobutanediol wherein the polyester has a glass transition temperature greater than 75° C., an acid value of 1 mg KOH/g to 6 mg KOH/g, and a number average absolute molecular weight of 4000 g/mol to 18000 g/mol. The compositions are useful for coating metal surfaces for food contact applications and are particularly useful for coating metal can ends.

Abstract: The present invention discloses powder coating compositions and to components and ingredients for incorporation therein, suitable for low temperature curing schedule and with excellent resistance to outside aging. The powder coating composition can be cured at a temperature from 140° C. to lead to a coating with excellent flow and high gloss. In one aspect of the invention, a composition having a polyester resin comprises 0.1 to 60 weight percent of mono or poly-functional satured or unsatured fatty acids of mixtures of them, 30 to 60 weight percent of an aromatic diacid or cycloalkyl diacids or anhydride 20 to 30 weight percent of aliphatic diol, 0 to 6 weight percent of aliphatic triol, 0 to 10 weight percent of isosorbide and isomers or cycloalkyl diol, 0 to 10 weight percent of C3-C12 aliphatic diacid, and with total weight percent of the monomers equal to 100.

Abstract: The present invention relates to powder coating compositions and to components and ingredients for incorporation therein, suitable for low temperature curing schedule and with excellent resistance to outside aging. The powder coating composition can be cured at a temperature from 140° C. to lead to a coating with excellent flow and high gloss.

Abstract: The present invention relates to powder coating compositions and to components and ingredients for incorporation therein, suitable for fast curing schedule and with excellent resistance to outside aging. Non-isocyanurate polyepoxide cross-linking reagents can be used, provided the nature of the carboxylated polyester resin is formed of at least 30 mole % aromatic acid and the chain of the carboxyl terminated polyester also incorporates a moiety derived from 1,4 cyclohexanedicarboxylic acid. The powder coating composition can be cured for 90 seconds at a temperature of 250° C. or 55 seconds at 270° C. or 20 seconds in an induction oven at a temperature of 300° C. in the presence of a catalyst.

Abstract: The present invention relates to powder coating compositions and to components and ingredients for incorporation therein, suitable for low temperature curing schedule and with excellent resistance to outside aging. The powder coating composition can be cured at a temperature from 140° C. to lead to a coating with excellent flow and high gloss.

Abstract: A method for determining gloss in a curative powder coatings containing at least two polyester resins and &bgr;-Hydroxyalkylamide formulations. The method includes the steps of: providing a powder coating comprising a first polyester resin and &bgr;-hydroxyalkylamide formulation having a first acid value and a second polyester resin and &bgr;-hydroxyalkylamide formulation having a second acid value; blending the first and second formulations together to make coating; determining the percent difference in the acid values between the first and second polyester resins; determining a surface gloss of the coating after application; determining a gloss versus percent difference in acid values correlation; and determining the amount of at least one of the resins to be present in the blend to achieve the desired gloss using the correlation.