| 摘要 |
PROBLEM TO BE SOLVED: To provide a curable fluoropolyether rubber composition which does not exhibit the increase in viscosity caused by compounding fillers, can be molded by LIM processing, gives a cured product excellent in mechanical characteristics, and has excellent oil and water repellency and resistances to solvents, chemicals, and weathering inherent in the fluoropolyether rubber. SOLUTION: This rubber composition contains (A) 100 pts.wt. linear fluoropolyether rubber having at least two alkenyl groups and a perfluoroalkyl ether structure in the main chain, (B) 10-50 pts.wt. silica filler having a specific surface area of 100 m2/g or higher and a bulk density of 100-200 g/l, (C) an organosilicon compound having at least two Si-bonded hydrogen atoms in an effective amount for curing ingredient (A), and (D) a catalytic amount of a hydrosilylation catalyst.
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