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AssigneeDaikin Industries, Ltd.
InventorsMitsuru Kishine, Masanori Kitaichi, Tsuyoshi Noguchi, Yoshito Tanaka, Takayuki Araki, Sadashige Irie
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According to the present invention, it is possible to provide a molding material, for example, a sealing material for semiconductor-related production apparatuses which comprises a fluorine-containing multi-segment polymer being excellent in mechanical properties (particularly at high temperature), abrasion resistance and transparency and ensuring reduced contamination and reduced gas permeation while maintaining inherent characteristics of a fluorine-containing elastomer such as flexibility, elasticity, sealing property, chemical resistance and heat resistance. A molding material comprising a fluorine-containing multi-segment polymer having an elastomeric fluorine-containing polymer chain segment and a non-elastomeric fluorine-containing polymer chain segment, in which the elastomeric fluorine-containing polymer chain segment imparts flexibility to the whole polymer and has perhaloolefin units as a recurring unit in an amount of not less than 95% by mole.
A molding material comprising a solid fluorine-containing multi-segment polymer having an elastomeric fluorine-containing polymer chain segment and a non-elastomeric fluorine-containing polymer chain segment, in which said elastomeric fluorine-containing polymer chain segment imparts flexibility to the whole polymer and has perhaloolefin units as a recurring unit in an amount of not less than 95% by mole, said non-elastomeric fluorine-containing polymer chain segment consists essentially of 85 to 100% by mole of tetrafluoroethylene and 0 to 15% by mole of CF2═CF—Rf1, in which Rf1 is CF3 or ORf2, wherein Rf2 is a perfluoroalkyl group having 1 to 5 carbon atoms, and in said fluorine-containing multi-segment polymer, A/(A+C) is equal to or larger than 65% by weight, provided that the elastomeric fluorine-containing polymer chain segment is represented by A, the non-elastomeric fluorine-containing polymer chain segment is represented by B, the fluorine-containing multi-segment polymer is represented by B-A-B or A-B and a polymer molecule consisting of the elastomeric fluorine-containing polymer chain segment A which is not bonded to the non-elastomeric fluorine-containing polymer chain segment B is represented by C.
A crosslinkable molding composition comprising 100 parts by weight of the fluorine-containing multi-segment polymer of claim 1, 0.05 to 10 parts by weight of an organic peroxide and 0.1 to 10 parts by weight of crosslinking aid.
A crosslinkable molding composition comprising 100 parts by weight of a fluorine-containing multi-segment polymer having a nitrile group as a curing site and 0.1 to 10 parts by weight of a crosslinking agent having a functional group capable of reacting with the nitrile group, wherein the fluorine-containing multi-segment polymer is a solid fluorine-containing multi-segment polymer having an elastomeric fluorine-containing polymer chain segment and a non-elastomeric fluorine-containing polymer chain segment, in which said elastomeric fluorine-containing polymer chain segment imparts flexibility to the whole polymer and has perhaloolefine units as a recurring unit in an amount of not less than 90% by mole.
Dependencies are inferred from the claim text.