초록 ▼

A thermosetting weatherable powder coating composition applyable to a temperature sensitive substrate by means of electrostatic spray or fluidized bed, and curable at low temperature to form a textured surface to hide irregularities on the surface of the underlying substrate. The powder coating comp

A thermosetting weatherable powder coating composition applyable to a temperature sensitive substrate by means of electrostatic spray or fluidized bed, and curable at low temperature to form a textured surface to hide irregularities on the surface of the underlying substrate. The powder coating composition includes a hardener with a functionality of 2 or greater capable of reacting with an acid or anhydride functional group, a polymeric coreactant with a functionality of 2 or greater capable of reacting with the hardener, a carboxylic acid functional polyester and optionally, a catalyst, but no texturing agent. The polymeric coreactant is made by polymerizing an ethylenically unsaturated monomer and at least one carboxyl acid functional ethylenically unsaturated monomer or anhydride functional ethylenically unsaturated monomer, and mixtures thereof.

대표청구항 ▼

A thermosetting weatherable powder coating composition applyable to a temperature sensitive substrate by means of electrostatic spray or fluidized bed, and curable at low temperature to form a textured surface to hide irregularities on the surface of the underlying substrate. The powder coating comp

A thermosetting weatherable powder coating composition applyable to a temperature sensitive substrate by means of electrostatic spray or fluidized bed, and curable at low temperature to form a textured surface to hide irregularities on the surface of the underlying substrate. The powder coating composition includes a hardener with a functionality of 2 or greater capable of reacting with an acid or anhydride functional group, a polymeric coreactant with a functionality of 2 or greater capable of reacting with the hardener, a carboxylic acid functional polyester and optionally, a catalyst, but no texturing agent. The polymeric coreactant is made by polymerizing an ethylenically unsaturated monomer and at least one carboxyl acid functional ethylenically unsaturated monomer or anhydride functional ethylenically unsaturated monomer, and mixtures thereof. able thermally and/or by means of high-energy radiation, wherein the oligomer or polymer comprises, in each case terminally and/or laterally, at least one vinyl ether group a) and at least one group b) which is different from the vinyl ether groups a) and is coreactive with said groups a), wherein on average at least one vinyl ether group a) and one group b) is present per oligomer or polymer, and wherein the groups b) comprise groups of formula I wherein n is from 0 to 10, and wherein the group of formula I is linked to the binder oligomer or polymer in form of an ester of (oligo)dihydrodicyclopentadienol and a monofunctional or polyfunctional carboxylic acid, said ester comprising a moiety of formula II wherein n is from 0 to 10. 9. The binder defined in claim 8, wherein the groups b) are copolymerizable with the vinyl ether groups a). 10. The binder defined in claim 8, wherein the oligomer or polymer is formed of C--C linkages and/or linkages selected from ester, ether, urethane, amide, imide, imidazole, ketone, sulfide, sulfone, acetal, urea, carbonate and siloxane linkages. 11. The binder defined in claim 8, wherein the oligomer or polymer is linear, branched, annular or dendrimeric. 12. The binder defined in claim 8, wherein the monofunctional or polyfunctional carboxylic acid is maleic acid or fumaric acid, and the ester is bonded to the binder oligomer or polymer by way of an ester linkage or an amide linkage.