| 摘要 |
PROBLEM TO BE SOLVED: To provide a room temperature curable organopolysiloxane composition giving a cured material excellent in bonding property to especially a surface-treated aluminum material, etc., and also excellent in water immersion and heat resistant bonding property. SOLUTION: This room temperature curable organopolysiloxane composition contains colloidal calcium carbonate treated with a treating agent containing (1) diorganopolysiloxane expressed by formula (1): HO[-Si(-R<SP>1</SP>)<SB>2</SB>-O-]<SB>m</SB>H [wherein, R<SP>1</SP>is a monovalent hydrocarbon group ; and (m) is a positive integer], (2) an organic silicon compound having at least 3 hydrolyzable groups in one molecule and (3) a mixture consisting of (a) 30-70 mass% carboxylic acid having≥100°C melting point or softening point, (b) 10-50 mass% saturated fatty acid expressed by formula: C<SB>n</SB>H<SB>2n+1</SB>COOH [(n) is a≥10 number] and (c) 5-30 mass% unsaturated fatty acid expressed by formulae: C<SB>n</SB>H<SB>2n-1</SB>COOH [(n) is a≥10 number] or C<SB>n</SB>H<SB>2n-3</SB>COOH [(n) is a≥10 number] by using 2.5-4.5 mass% amount agent based on the calcium carbonate. COPYRIGHT: (C)2007,JPO&INPIT
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