To provide a fluoro polyether-based composition that mainly includes a mixture of a perfluoro polyether polymer having an ester structure at both ends thereof and an inorganic filler for the preparation of a room temperature curable fluoro polyether-based rubber composition, and has reduced viscosity and improved discharging performance and mix workability.
The fluoro polyether-based composition includes: (a) 100 pts.mass of a straight-chain fluoro polyether compound with a number average molecular weight of 3,000 to 100,000 that includes at least two ester groups in a molecule and has a divalent perfluoro alkyether structure in a main chain; (b) 0.1-50 pts.mass of a compound with a number average molecular weight of 200 to 30,000 that includes at least one carbon acid in one molecule and has a perfolou alkyl or alkylen structure having 4 or more carbon atoms in a main chain, or a monovalent or divalent perfluoro alkyether structure; and (c) 0.5 to 300 pts.mass of an inorganic filler.
MUTO MITSUO
Saori Shigematsu
Katsunari Kobayashi
Takeshi Ishikawa
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