Polymer additives for powder coatings
AssigneePPG Industries Ohio, Inc.
InventorsWilliam H. Retsch, Michael J. Ziegler, Jackie L. Kulfan, Ronald R. Ambrose, Christopher P. Kurtz
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Abstract
Star polymers prepared by reacting a highly branched polymer and either a lactone or lactam are disclosed. These star polymers find particular application as additives for powder coating compositions, to improve various performance properties thereof. Powder coating composition comprising the described star polymers are also disclosed.
Claims27
A compound that comprises the reaction product of a highly branched polymer having terminal amine functional groups and a lactam, wherein the highly branched polymer is the step-growth polymerization reaction product of a polyfunctional first monomer having a first functional group and a polyfunctional second monomer having a second functional group wherein the first and second functional groups will react with each other but not themselves.
A curable powder coating composition comprising:
- (a) a compound that comprises the reaction product of a highly branched polymer having terminal functional groups and a lactone, wherein the highly branched polymer is the step-growth polymerization reaction product of a polyfunctional first monomer having a first functional group and a polyfunctional second monomer having a second functional group wherein the first and second functional groups will react with each other but not themselves;
- (b) a crosslinker;
- and
- (c) film forming resin.
A curable powder coating composition comprising:
- (a) the reaction product of a highly branched polymer having terminal amine functional groups and a lactam, wherein the highly branched polymer is the step-growth polymerization reaction product of a polyfunctional first monomer having a first functional group and a polyfunctional second monomer having a second functional group wherein the first and second functional groups will react with each other but not themselves;
- and
- (b) a crosslinker.
Dependencies are inferred from the claim text.