| 摘要 |
<p>To a silicone resin obtained through cohydrolytic condensation of 100 pbw of a mixture of 1-50 Si mol% of tetraalkoxysilane, 50-99 Si mol% of trialkoxysilane and 0-10 Si mol% of dialkoxysilane with less than 100 pbw of water, having a Mn of at least 1,500 and containing 30-80 mol% of R<1>SiO3/2 units and 20-70 mol% of R<1>SiO2/2(OX) and R<1>SiO1/2(OX)2 units combined, a curing catalyst and a solvent are added to formulate a silicone resin composition. It is applied and heat cured to a plastic substrate to form a protective coat having a high hardness and improved properties such as mar resistance, crack resistance, adhesion, water resistance, heat resistance and weathering resistance.</p> |
