| 摘要 |
<p>A room-temperature-curable organopolysiloxane composition comprising: (A) a diorganopolysiloxane that has a viscosity of 100 to 1,000,000 mPa s at 25 °C and molecular terminal groups selected from the group consisting of alkoxysilyl groups, hydrogen atoms, hydroxyl groups, and substituted or unsubstituted univalent hydrocarbon groups but where at least 50 mole % of the terminal groups are said alkoxysilyl groups, which are represented by the following formula: -X-SiR1 a (OR2)( 3-a) (wherein R1 represents substituted or unsubstituted univalent hydrocarbon groups, R2 represents alkyl groups, X represents oxygen atoms or alkylene groups, and "a" is 0 or 1); (B) an organotrimethoxysilane of the formula given below or a product of partial hydrolyzation and condensation of said organotrimethoxysilane: R3Si(OCH3)3 (wherein R3 represents substituted or unsubstituted univalent hydrocarbon groups); (C) an organotrialkoxysilane of the formula given below or a product of partial hydrolyzation and condensation of said organotrialkoxysilane: R4Si(OR5)3(wherein R4 represents substituted or unsubstituted univalent hydrocarbon groups, and R5 represents alkyl groups with two or more carbon atoms); and (D) a titanium chelate catalyst. The composition possesses excellent storage stability in a moisture-free environment and provides easy control of a curing speed.</p> |
