| 摘要 |
The present invention provides a curable polymethylsilsesquioxane composition that uses polymethylsilsesquioxane obtained from inexpensive precursors and that provides a hard, scratch-resistant, highly corrosion-resistant, water-repellent, and transparent cured film. The curable polymethylsilsesquioxane composition of the invention includes a polymethylsilsesquioxane having the general formula (CH3SiO3/2)n(CH3Si(OH)O2/2)m and a predetermined number-average molecular weight, Mn, from 380 to 2,000, wherein m and n are positive numbers that provide the predetermined Mn, with the proviso that the value of m/(m+n) is less than or equal to 0.152/(Mnx10-3)+0.10 and greater than or equal to 0.034/(Mnx10-3) and 10 to 250 weight parts colloidal silica.
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