Abstract:
Filler-containing polytetrafluoroethylene granular powder, which has a large apparent density, a small average particle size and a sharp particle size distribution and a superior powder flowability, and gives a molded product having a superior tensile strength, elongation and surface roughness, and a process for preparing the same. The granular powder is prepared by granulation of a mixture of a PTFE powder and a filler in water with stirring in the presence of an organic liquid forming liquid-liquid interface with water and a nonionic surfactant.
Abstract:
To provide a water-repelling agent for batteries which comprises an aqueous dispersion or organosol containing fine particles having an average particle size of from 0.05 to 1 .mu.m and made of a tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymer and/or a non-fibril-forming tetrafluoroethylene polymer, is obtained without use of a powder of a fluorine-containing resin as it is, can enhance chemical resistance, heat resistance and water repellency particularly more effectively without being fibrillated even if mixed with electrode materials and is excellent in workability, and to provide a battery which is produced by using the water-repelling agent for batteries and is excellent in cycle life and internal pressure characteristics.
Abstract:
Polytetrafluoroethylene molding powder which comprises 0.01 to 1% by weight of a perfluoro(vinyl ether) unit and which has a heat of crystallization of 18.0 to 25.0 J/g. The molding powder provides a molded article which has a flex life of not less than 7 million cycles, a creep resistance (total deformation at 200.degree. C.) of not more than 20%, and a creep resistance (total deformation at 25.degree. C.) of not more than 15%. The polytetrafluoroethylene molding powder which is excellent in both creep resistance and flex fatigue resistance is provided as a molding material for parts which are repeatedly bent such as pump.
Abstract:
A composite microparticle of fluorine containing resin which is obtained by emulsion polymerization, having a core portion of a perfluoro resin which contains 80 to 100% by weight of TFE and 0 to 15% by weight of other copolymerizable fluorine containing olefin in a monomer composition, is crystalline and has a melting point of not lower than 250 C.; and a shell portion of vinylidene fluoride resin which contains 30 to 100 mole % of vinylidene fluoride and 0 to 70 mole % of other copolymerizable fluorine containing olefin (excluding hexafluoroisobutene), is crystalline and has a melting point of not lower than 70.degree. C.; the composite particle having a multilayer or gradient structure and an averaged particle size of 0.05 to 1.0 .mu.m, which is excellent in blending property with other resins or elastomers, and dispersibility in coating materials.
Abstract:
An apparatus for vaporizing and supplying an organometal compound comprising a gas flow path for starting gas which connects a container filled with the organometal compound to a crystal growth chamber heated under reduced pressure through a main valve, a massflow controller for the starting gas and a valve for supplying the starting gas; and a flow path for a carrier gas which connects a carrier gas source to the discharge outlet of the valve for supplying the starting gas through a massflow controller for carrier gas and a heat exchanger. The container, the flow path for the starting gas and the flow path for the carrier gas are arranged in a constant temperature oven.
Abstract:
In a flow rate control valve comprising a fixed core made of a magnetic material provided with a coil arranged on a circumference thereof, a movable core and a valve body made of a magnetic material moved by an attraction by a magnetic force of said fixed core or a release from said magnetic force to open and close a valve seat and a movable member composed of a supporting spring, the fixed core is provided with a flowing conduit passing through an opening formed in a surface opposite to said movable member and the movable member is provided with a passage guiding a fluid, so that the total quantity of fluid can be smoothly flown without staying a part of the fluid.
Abstract:
A golf practice device comprising a mat with at least two sensors arranged therein in the direction of a swing orbit of a head of a golf club. A swing time substantially from a start of a back swing to a point of an impact with a golf ball is calculated in response to signals output by the sensors, and the result is indicated so that a golfer can observe same and thus achieve a stable swing. It is possible to distinguish an address motion and an actual swing before impact by adapting a special combination of the outputs of the two sensors.
Abstract:
A resilient member having preselected properties is disposed on a bolt securing an elastomeric bumper to a vehicle body bumper stay for biasing the elastomeric member against the bumper stay with a force which remains within preselected limits despite expansion and creeping of the elastomeric bumper. The hole in the bumper stay and the hole in the elastomeric bumper through which the bolt is disposed are of different diameters, or one is elongate to allow the bolt and the elastomeric bumper to move in a plane normal to the axis of the bolt.
Abstract:
There is provided a curable fluorine-containing polymer composition which is quickly cured at relatively low temperatures by hydrosilylation reaction and provides a coating film which has high hardness, excellent solvent resistance and flexibility. The curable fluorine-containing polymer composition comprises a fluorine-containing polymer comprising a fluorinated ethylenic monomer unit and a non-fluorinated ethylenic monomer unit, in which a part or the whole of the non-fluorinated ethylenic monomer units is a unit represented by the formula: wherein R1 is hydrogen or methyl; R2 is a hydrocarbon group having ethylenic C═C; X is —C(O)NH— or —C(O)—; R3 is —O—, —O[CH(R4)]mO—, —(CH2)mO—, —OC(O)—(CH2)mO— or —(CH2)mOC(O)—(CH2)nO—, where R4 is —H, —OH, —CH2OH or —O—X—R2, a siloxane compound having hydrogen atom bonded to silicon atom, and a catalyst for hydrosilylation reaction.
Abstract translation:提供一种通过氢化硅烷化反应在相对低的温度下快速固化的可固化含氟聚合物组合物,并提供具有高硬度,优异的耐溶剂性和柔性的涂膜。 可固化含氟聚合物组合物包含含有氟化乙烯性单体单元和非氟化乙烯性单体单元的含氟聚合物,其中一部分或全部未氟化烯属单体单元为式 其中R1是氢或甲基; R2是具有烯属C = C的烃基; X是-C(O)NH-或-C(O) - ; R 3是-O-,-O [CH(R 4)] m O - , - (CH 2)m O - , - OC(O) - (CH 2)m O-或 - (CH 2)mOC(O) - (CH 2) 其中R4是-H,-OH,-CH2OH或-O-X-R2,具有与硅原子键合的氢原子的硅氧烷化合物和氢化硅烷化反应的催化剂。
Abstract:
A molding method for forming an impeller, includes a mold clamping process having a first mold for forming one side of blades, a second mold firmly clamped with the first mold, and a core arranged at the first mold relative to the blades, the mold clamping process clamping the first mold to the second mold in a state where the core is arranged between the first mold and the second mold, an injecting process injecting resin in a cavity obtained by the mold clamping process, and a mold removing process including the steps of releasing at least the first mold from the clamped state obtained by the mold clamping process to generate an opened portion in the first mold after the resin is hardened, rotating the core about a rotational axis toward the opened portion of the first mold, and separating the core from the resin-molded impeller.