| 摘要 |
PROBLEM TO BE SOLVED: To obtain a room temperature curable organopolysiloxane composition for clean rooms which releases no basic materials, causes no contact point troubles and is excellent in preservation stability and adhesiveness by making the composition to contain a specific diorganopolysiloxane and an acidic filler. SOLUTION: This room temperature curable organopolysiloxane composition for clean rooms is obtained by blending preferably 5-200 pts.wt. of (B) an acidic filler such as (surface treated) kaolin clay, or the like, with 0.1-20 pts.wt. of (C) an alkoxy-α-silyl ester expressed by the formula [R1 and R2 are each methyl or ethyl; R3 and R4 are each H or a (substituted) monovalent hydrocarbon; R5 is a (substituted) >=6C monovalent hydrocarbon; (a) is 0 or 1], based on 100 pts.wt. of (A) a diorganopolysiloxane having molecular chain ends sealed with 1-3 alkoxy residues or vinyloxy residues and >=25 cSt viscosity and containing <=0.1 wt.% of cyclic and straight chain siloxanes having 3-20 degree of polymerization as impurities.
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