摘要:
A fluoroelastomer composition, which comprises 100 parts by weight of vinylidene fluoride-perfluoro(methyl vinyl ether)-tetrafluoroethylene terpolymer or vinylidene fluoride-hexafluoropropene copolymer, and 10-50 parts by weight of liquid fluoroelastomer having a viscosity of 500 to 3,000 cps at 100° C., can be made cross-linkable or vulcanizable fluoroelastomer composition upon further addition of 0.5 to 5 parts by weight of an organic peroxide and 0.5 to 10 parts by weight of a polyfunctional unsaturated compound or further addition of 0.5 to 10 parts by weight of a polyol-based vulcanizing agent thereto. The fluoroelastomer composition can give a cross-linked or vulcanized product having a hardness (Durometer A) of not more than 50 and distinguished processability and compression set resistance characteristics.
摘要:
A sealing material, which comprises a curing product of a composition comprising (A) an acrylic polymer having at least one alkenyl group capable of undergoing hydrosilylation reaction, (B) a hydrosilyl group-containing compound and (C) a hydrosilylation catalyst as essential components, is suitable for use as cam cover seals and oil pan seals for automobile engines, fuel cell cooling medium seals, automobile wire harnesses seals, HDD cover gasket or vibration-insulating HDD cover gasket seals, etc.
摘要:
A material for vibration-absorbable mounts, which comprises a cured product of a composition comprising (A) an acrylic polymer having at least one alkenyl group capable of undergoing hydrosilylation reaction, (B) a hydrosilyl group-containing compound and (C) a hydrosilylation catalyst as essential components, has a distinguished vibration-absorbing characteristic such as a loss tangent (tan δ) of 0.5 or more, and also a distinguished heat resistance, and thus is sufficiently suitable for vibration-absorbable mounts for HDDs as mounted on automobiles. Furthermore, the material for vibration-absorbable mounts has distinguished heat resistance, oil resistance, vibration-absorbing characteristic, compression set characteristic, low hardness, cleanliness (out gassing property and non-corrosiveness), etc. and thus can be effectively used as vibration-absorbable mounts for electric and electronic parts provided with opto-magnetic drives, for example CD, DVD, HDD, etc. for automobiles, and also as vibration-absorbable pads, etc. for electric and electronic part units.
摘要:
A hard disc drive cover-integrated gasket, which comprises a metallic cover and a packing material integrated with the metallic cover, the packing material being a molding material from a mixture comprising 100 parts by weight of EPDM or a blend of EPDM and polystyrene type thermoplastic elastomer, 10-100 parts by weight of polypropylene type resin, 20-130 parts by weight of a plasticizer and 0.1-10 parts by weight of a cross-linking agent is easy to fabricate and has distinguished characteristics as low outgassing characteristics, low hardness, good sealability at elevated temperatures, etc.
摘要:
A hard disc drive cover-integrated gasket, which comprises a metallic cover and a packing material integrated with the metallic cover, the packing material being a molding material from a mixture comprising 100 parts by weight of EPDM or a blend of EPDM and polystyrene type thermoplastic elastomer, 10–100 parts by weight of polypropylene type resin, 20–130 parts by weight of a plasticizer and 0.1–10 parts by weight of a cross-linking agent is easy to fabricate and has distinguished characteristics as low outgassing characteristics, low hardness, good sealability at elevated temperatures, etc.
摘要:
A high-performance gasket (1) capable of coping with a reduction in size and developing a sealing property without producing a squeeze-out at the time of attachment and using a material having a hardness range of 30 to 80 degrees (JIS durometer type A), wherein the requirement of W1/W0 =3 is satisfied where the length of the non-bonded portion of the base part (1a) around the cross-section thereof excluding the bonded portion is (L), and the compressibility of the gasket when compressed is 13.5% or higher.
摘要:
A protruding part formed on one split end part of a boot is temporarily fixed to a recessed part formed on the other split end part in the state where step-shaped hook portions formed on one-end thereof are engagingly locked to each other, and connected by welding, fusion or adhesion. The protruding part is hooked only in one thickness directional side. An overlapping protruding part formed on the non-hook side (inner side) of the recessed part is connected extending over the inside surface of the protruding part and the inside surface of the split end part continued thereto.
摘要:
A resin composition for automobile constant velocity joint boots having a surface hardness (Shore-D) of 34.about.44, and obtainable by melt mixing as essential components: 100 parts by weight of polyester elastomer (A); and, for every 100 parts by weight of said polyester elastomer (A), 0.05.about.7.0 parts by weight of organic polyisocyanate compound (B); and 0.1.about.5.0 parts by weight of silicone compound (C). A molded automobile constant velocity joint boot molded therefrom is superior in abrasion resistance, and flexibility.