| 摘要 |
The present invention relates to a powder paint composition for bottom coating of an aluminum sputtering wheel and, more specifically, to a thermosetting polyester powder paint composition enabling easy sputter coating and offering a metallic coating texture without changing the structure of an existing aluminum wheel coating line, by solving problems of a powder paint for bottom coating, which is hardly used because of difficult formation of a sputtering film, degradation of outer appearance, and generation of cracks due to generation of unstable sputtering layers. The powder paint composition for bottom coating of an aluminum sputtering wheel contains 45-74 wt% of more than one kind of polyester resin, 4-15 wt% of a polyester hardener, 0.3-2.5 wt% of an additive, 18-38 wt% of an inorganic filler, and 0.5-1.5 wt% of pigment. |
