| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the residual tack of the surface of a cured article by compounding (A) a silicon-functional group-containing silyl or siloxanyl terminated polyether, a curing catalyst and an oxide fine powder selected from the group consisting of titanium dioxide, magnesium oxide and calcium oxide. SOLUTION: A polyether moiety of component (A) preferably comprises an oxyalkylene group of the general formula: R1-O- (wherein R1 is a 2-4C alkylene group). When an oxide fine powder is titanium dioxide, it preferably has an average particle diameter of 0.10-0.50μm and a TiO2 purity of 98% or more. If an oxide fine powder is magnesium oxide, it preferably has an MgO purity of 95% or more and a BET specific surface area of 150 m2/g or less. If an oxide fine powder is calcium oxide, it preferably has a CaO purity of 95% or more. The suitable blending ratio, component (A): curing catalyst: oxide fine powder is 100 : 0.05-25 : 1-50 by pts.wt.
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