Patent ID: 9169417
Filing Date: 2015-10-27
Classification: B32B,C08G,C08L,C09D

Abstract:
1. A composition comprising a solid curable powder coating formulation including (i) at least one divinylarene dioxide resin, wherein the at least one divinylarene dioxide resin is selected from the group consisting of: (I) a divinylarene dioxide compound, (II) a blend of (IIa) a solid epoxy resin and (IIb) a divinylarene dioxide compound, (III) an epoxy oxazolidone resin prepared from (IIIa) a divinylarene dioxide compound and (IIIb) a monomeric isocyanate and/or a polymeric isocyanate; (IV) a solid epoxy resin prepared from a divinylarene dioxide compound; and (V) a hydroxyl-functional polyether prepared from (Va) a divinylarene dioxide compound and (Vb) a diphenol; wherein the at least one divinylarene dioxide resin is phenolic functional; and (ii) at least one curing component wherein the at least one curing component comprises an epoxy resin, a blend of an epoxy resin and a curing catalyst, or mixtures thereof; wherein the formulation melt viscosity at 150° C., as measured by ASTM D4242-07, is at least 5 percent lower than a corresponding formulation prepared using a bisphenol A diglycidyl ether resin instead of the at least one divinylarene dioxide resin as listed in (i) above; and wherein the solid curable powder coating formulation when cured is adapted to provide a cured powder coating thermoset having a glass transition temperature, as measured by differential scanning calorimetry, of at least 3 percent greater than a cured powder coating thermoset cured from a corresponding cured formulation prepared using a bisphenol A diglycidyl ether resin instead of the at least one divinylarene dioxide resin as listed in (i) above.