| 摘要 |
PURPOSE: A UV-curable coating composition is provided to improve hardness, weatherability, staining resistance of a coating film and to control the content of a vinyl group in a multi-vinyl polyorganosiloxane, thereby easily controlling the hardness of a coating film. CONSTITUTION: A UV-curable coating composition comprises a polyorganosiloxane containing a multi-vinyl group represented by chemical formula 1. In chemical formula 1, each of R1-R7 is a substituted or unsubstituted C1-30 alkyl group or substituted or unsubstituted C1-10 aryl group and does not contain O, N, S; and each of n and m is an integer from 3-300, n+m is 6-600, and the molar ratio of n and m is 1:1-5. The coating composition comprises 10-50 weight% of the multi-vinyl polyorganosiloxane represented by chemical formula 1, 5-15 weight% of an acrylic monomer, 5-10 weight% of a photoinitiator, and 30-50 weight% of a curing agent. |
