摘要:
A liquid silicone rubber composition for fixing rolls comprising: (A) a diorganopolysiloxane which has at least two silicon-bonded alkenyl groups in each molecule and is liquid at room temperature, (B) an inorganic filler, (C) an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms in each molecule, (D) a platinum catalyst, and (E) a particulate hydroxide or oxide of an alkali metal or a particulate hydroxide or oxide of an alkaline earth metal; and a fluorocarbon resin-covered fixing roll produced by providing a fluorocarbon resin layer on the peripheral surface of a roll shaft across a silicone rubber layer, wherein said silicone rubber layer is produced by curing the above-mentioned liquid silicone rubber composition.
摘要:
A curable liquid silicone rubber composition for use in high-voltage electrical insulating parts, which consists of (A) a polyorganosiloxane containing alkenyl groups, (B) fumed silica, (C) a polyorganohydriodosiloxane, (D) a platinum catalyst, (E) finely powdered aluminum hydroxide, and (F) 1 to 150 parts by weight of a finely powdered metal compound selected from the group consisting of finely powdered carbonate or finely powdered hydrogen salt of a metal selected from the 1st, 2nd, 3rd, 7th, or 9th group of the periodic table.
摘要:
A liquid silicone rubber composition for a lubricant seal having after it is cured high resistance to lubricant, with high stability displayed even in lubricant that has been subjected to thermal and oxidative degradation, and having its rubber elasticity well maintained. The liquid silicone rubber composition for a lubricant seal comprises the following ingredients: (A) an organopolysiloxane containing 2 or more silicon-atom-bonded alkenyl groups in each molecule; (B) an inorganic filler; (C) an oxide or hydroxide of an alkaline-earth metal with an atomic weight of 40 or greater; (D) an organohydrogensiloxane containing 3 or more silicon-atom-bonded hydrogen atoms in each molecule; and (E) a platinum-type catalyst.
摘要:
An extrudable, self-extinguishing, room temperature-curable organopolysiloxane is obtained by combining a polydiorganosiloxane having hydrolyzable groups at the terminals, aluminum hydroxide microparticles having diameters not exceeding 50 micrometers, calcium carbonate microparticles having diameters not exceeding 20 micrometers, platinum or a platinum compound, and silane or siloxane containing at least three hydrolyzable groups.
摘要:
The introduction of a foamable silicone rubber composition that evolves neither toxic gas nor hydrogen, that does not suffer from inhibition of its cure to give silicone rubber, and that cures to give a silicone rubber foam containing uniform microcells. The foamable silicone rubber composition comprises:(A) 100 weight parts thermosetting liquid silicone rubber composition, and(B) 0.1 to 30 weight parts thermally expansible hollow plastic microparticles.
摘要:
For a crane having a boom for hanging loads apparatus for detecting overload is provided which comprises a boom bending moment set value generator, which is determined by a variable quantity corresponding to the operating radius of the crane, a boom bending moment detector having transversely spaced strain gauges mounted on the boom, a comparator for comparing the output of the boom bending moment set value generator with the averaged output of the boom bending moment detector, and means operated by the output of the comparator which is produced when the output of the detector exceeds the output of the boom bending moment set value generator.
摘要:
A two-part curable liquid silicone rubber composition comprises a first liquid composition and a second liquid composition. The first and second liquid compositions are stored separately and yield, upon mixing, a silicone rubber forming composition. The silicone rubber composition comprises: (A) an alkenyl group-containing organopolysiloxane comprising (A-1) an organopolysiloxane having only a silicon-bonded alkenyl group at each molecular terminal and (A-2) an organopolysiloxane having from 1 to 4 silicon-bonded alkenyl groups in side molecular chains and containing not greater than 2.0 wt. % of alkenyl groups; (B) a calcium carbonate powder; (C) a hydrosilylation reaction catalyst; and (D) an organohydrogenpolysiloxane having silicon-bonded hydrogen atoms.
摘要:
The present invention provides a polyurethane which is non-sticky, exhibits superior handling properties and superior moldability, and has superior adhesive properties with silicones even if a surface activation treatment is not carried out beforehand. The polyurethane of the present invention contains polyol units and organic polyisocyanate units. The polyol units contain an alkenyl group-containing organopolysiloxane structure in an amount ranging from 0.01 to 20% by weight with respect to the weight of the aforementioned polyurethane.
摘要:
The present invention provides a polyurethane which is non-sticky, exhibits superior handling properties and superior moldability, and has superior adhesive properties with silicones even if a surface activation treatment is not carried out beforehand. The polyurethane of the present invention contains polyol units and organic polyisocyanate units. The polyol units contain an alkenyl group-containing organopolysiloxane structure in an amount ranging from 0.01 to 20% by weight with respect to the weight of the aforementioned polyurethane.
摘要:
A method of bonding silicone rubber parts characterized by placing an adhesive-agent layer formed from a hydrosilylation-curable silicone rubber composition, which contains 2 to 50 mass % calcium carbonate powder, between the silicone rubber parts and then irradiating the adhesive-agent layer with high-frequency or microwave radiation. A preferable silicone rubber parts suitable for the method may be a synthetic-fiber fabric coated with a layer of silicone rubber which can be used for manufacturing an airbag.