| 摘要 |
The invention provides powder coatings that produce consistent finishes when cured, and are stable when uncured. These powder coatings of the invention include novel film forming systems. The novel film forming system, in turn, includes a polymer component and a crosslinker component. In one embodiment, the crosslinker component is novel; and, in another embodiment, both the crosslinker and polymer components are novel. The novel crosslinker component includes a novel, polyfunctional isocyanate compound which is at least partially blocked with at least one of the following: a polyhydroxy aromatic compound, or a mixture of a polyhydroxy aromatic compound and a hydroxy-functional ester compound. The novel polymer component which can be used when practicing certain embodiments of this invention includes a novel polyester polyol. This novel polyester polyol includes the reaction product of a cycloaliphatic component and a polyfunctional isocyanurate component. |
