| 摘要 |
PURPOSE:To obtain a one-package type room temperature curing organopolysiloxane composition having excellent long-period storage stability under a sealed condition, by blending an organopolysiloxane and an alkoxysilane with a titanium chelate compound as a curing catalyst and a beta-diketone or beta-ketonic acid ester. CONSTITUTION:A composition consisting of (A) 100pts.wt. straight-chain organopolysiloxane which has 20-1,000,000 centistokes viscosity at 25 deg.C and molecular ends hindered with OH, alkoxy group or alkoxysilylalkyl group, (B) 0.5-15pts.wt. alkoxysilane (partial hydrolysis condensate) shown by the formula (R is monofunctional hydrocarbon group; R<1> is alkyl or alkoxylated alkyl; a is 0 or 1), such as tetramethoxysilane, etc., (C) 0.1-10pts.wt. titanium chelate catalyst such as titanium diisopropoxybis(ethylacetoacetate) and (D) 0.01-5pts.wt. beta-diketone or beta-ketonic acid ester (ethyl acetoacetate, etc.). |
