Abstract: Thermosetting powder coating compositions and their method of application to substrates primed with an electrodeposited coating are disclosed. The powder coating composition comprises a solid particulated mixture of a polyepoxide and an elastomer-modified phenolic compound which is a reaction product of an epoxy resin, a functionalized elastomer and a phenolic compound. The use of the elastomer-modified phenolic composition permits the preparation of low viscosity, stable powder coating formulations for chip-resistant coatings.

Abstract: Powder coating compositions are provided including a thermosetting or thermoplastic particulate resinous material and as a flow modifier, a copolymer of maleic anhydride or a substituted maleic anhydride and a copolymerizable material selected from among cycloalkenes and aliphatic olefins, with said copolymer optionally chemically modified with a primary amine or alcohol. Such flow modifiers can provide the cured coating with recoat adhesion and crater control.

Abstract: A thermosetting powder coating composition which has good handling properties and which has a good bland of physical properties such as appearance, flexibility, hardness, solvent resistance, corrosion resistance and exterior durability is disclosed. The composition comprises a co-reactable particulate mixture of a carboxylic acid group-containing acrylic polymer, a second carboxylic acid group-containing polyurethane having sufficient crystallinity to assist in flow of the powder coating compositions, a beta-hydroxyalkylamide crosslinking agent and an amorphous acid group-containing polyurethane.

Abstract: Thermosetting powder coating compositions comprising a curable particulate resinous material and a flow control agent which is a copolymer of an alkyl acrylate or methacrylate containing from 6 to 20 carbon atoms in the alkyl group and a hydroxyalkyl acrylate or methacrylate. The flow modifiers enhance the rheology of the thermosetting powder coating composition providing for smoother coatings while at the same time not adversely affecting appearance or adhesion with associated coatings, for example, previously applied electrodeposited primers or subsequently applied topcoats.

Abstract: A thermosetting powder coating composition which has good stability, pigment dispersion and impact characteristics is disclosed. The composition comprises a co-reactable particle mixture of an acid group-containing acrylic polymer having a Tg in the range of -20.degree. C. to 30.degree. C., an acid group-containing acrylic polymer having a Tg in the range of 40.degree. C. to 100.degree. C. and a curing agent, therefor.

Abstract: A thermosetting powder coating composition which has good handling properties and which has a good blend of physical properties such as appearance, flexibility, hardness, solvent resistance, corrosion resistance and exterior durability is disclosed. The composition comprises a co-reactable particulate mixture of a carboxylic acid group-containing acrylic polymer, a second carboxylic acid group-containing polyester having sufficient crystallinity to assist in flow of the powder coating compositions, a beta-hydroxyalkylamide crosslinking agent and an amorphous acid group-containing polyester.

Abstract: A thermosetting powder coating composition which has good stability, pigment dispersion and impact characteristics is disclosed. The composition comprises a co-reactable particle mixture of an acid group-containing acrylic polymer having a Tg in the range of -20.degree. C. to 30.degree. C., an acid group-containing acrylic polymer having a Tg in the range of 40.degree. C. to 100.degree. C. and a curing agent, therefor.

Abstract: The disclosure is directed to a compound which is a reaction product of at least one phosphonic acid group of an alpha-aminomethylene phosphonic acid containing at least one group corresponding to the formula, ##STR1## with an epoxy group of a compound containing at least one epoxy group. The disclosure is also directed to waterborne coating compositions, organic solvent-borne coating compositions, and powder coating compositions containing the aforesaid reaction product.

Abstract: There is disclosed herein an improved thermosetting powder coating composition comprising an epoxy resin and a curing agent, the improvement comprising the curing agent which is a polyol-modified polymeric polyanhydride containing anhydride linkages in the polymeric backbone.

Abstract: The thermosetting powder coating composition which has good stability and good physical properties, such as appearance, flexibility, hardness, solvent resistance and corrosion resistance, is disclosed. The composition comprises a co-reactable particulate mixture of a carboxylic acid group-containing polymer, a polyepoxide, and a beta-hydroxylalkylamide.

Abstract: A thermosetting powder coating composition and a coated article are disclosed. The composition comprises a coreactable particulate mixture of an acid group-containing acrylic polymer and a compatible epoxy novolac resin and an incompatible epoxy resin. The compositions have a good balance of properties and are useful as coatings for appliance, general industrial and automotive applications.

Abstract: A thermosetting powder coating composition which has good stability, pigment dispersion and impact characteristics is disclosed. The composition comprises a co-reactable particle mixture of an acid group-containing acrylic polymer having a Tg in the range of -20.degree. C. to 30.degree. C., an acid group-containing acrylic polymer having a Tg in the range of 40.degree. C. to 100.degree. C. and a curing agent, therefor.

Abstract: A thermosetting powder coating composition which has good handling properties and which has a good blend of physical properties such as appearance, flexibility, hardness, solvent resistance, corrosion resistance and exterior durability is disclosed. The composition comprises a co-reactable particulate mixture of a carboxylic acid group-containing acrylic polymer, a second carboxylic acid group-containing material having sufficient crystallinity to assist in flow of the powder coating compositions and a beta-hydroxalkylamide crosslinking agent.

Abstract: A thermosetting powder coating composition and a coated article are disclosed. The composition comprises a coreactable particulate mixture of an acid group-containing acrylic polymer and a compatible epoxy novolac resin and an incompatible epoxy resin. The compositions have a good balance of properties and are useful as coatings for appliance, general industrial and automotive applications.

Abstract: The thermosetting powder coating composition which has good stability and good physical properties, such as appearance, flexibility, hardness, solvent resistance and corrosion resistance, is disclosed. The composition comprises a co-reactable particulate mixture of a carboxylic acid group-containing polymer, a polyepoxide, and a beta-hydroxylalkylamide.

Abstract: A coated article having improved chip resistance and a method of providing such a chip resistant coated article are disclosed. The article includes a metal substrate, a coating layer of an elastomer-modified epoxy derived from a polyepoxide and from 5 to 35 percent by weight of a functionally-terminate diene-containing polymer, and a carboxyl-functional material having a carboxyl-functionality of at least two such as a carboxyl-functional polyester, a carboxyl-functional acrylic polymer or a di- or polycarboxylic acid, and at least one additional coating layer having a different composition than the elastomer-modified epoxy containing layer.

Abstract: The thermosetting powder coating composition which has good stability and gives good physical properties, such as exterior durability, appearance, flexibility, hardness, solvent resistance and corrosion resistance, is disclosed. The composition comprises a co-reactable particulate mixture of a carboxylic acid group-containing polyester and a beta-hydroxylalkylamide.

Abstract: A thermosetting powder coating composition which has good handling properties and which has a good blend of physical properties such as appearance, flexibility, hardness, solvent resistance, corrosion resistance and exterior durability is disclosed. The composition comprises a co-reactable particulate mixture of an acid group-containing acrylic polymer; an aliphatic dicarboxylic acid containing from 4 to 20 carbon atoms per molecule and/or a polymeric polyanhydride and a beta-hydroxy alkylamide crosslinking agent.

Abstract: A thermosetting powder coating composition which has good handling properties and which has a good blend of physical properties such as appearance, flexibility, hardness, solvent resistance, corrosion resistance and exterior durability is disclosed. The composition comprises a co-reactable particulate mixture of an acid group-containing acrylic polymer; an aliphatic dicarboxylic acid containing from 4 to 20 carbon atoms per molecule and/or a polymeric polyanhydride and a beta-hydroxyalkylamide crosslinking agent.

Abstract: A thermosetting polymer powder coating composition comprising finely divided powder particles that have a diameter of about 1-100 microns wherein the powder particles are a blend ofA. a hard acrylic polymer having a high glass transition temperature;B. a soft acrylic polymer having a low glass transition temperature;C. a blocked organic polyisocyanate;D. a hydroxy functional plasticizer; andE. catalytic amount of an organometallic compound;The thermosetting powder coating composition is particularly useful as an exterior finish for automobile and truck bodies.