摘要:
Thermoplastic elastomer composition characterized by excellent oil resistance while preserving high tear resistance and tension pull resistance comprises non-functionalized block copolymer of aromatic vinyl compound and conjugated diene or selectively hydrogenated product thereof (e.g. styrene-butadiene-styrene block copolymer), rubber polymer having at least one functional group selected from the group consisting of carboxyl, amino, epoxy and hydroxyl (e.g. acrylonitrile-butadiene copolymer containing a carboxyl group as a reactive functional group), and reactive aromatic vinyl polymer having a functional group which is reactive with the functional group of the rubber (e.g. reactive polystyrene containing 1% by weight oxazolinyl group when the rubber polymer is carboxyl group containing acrylonitrile-butadiene copolymer).
摘要:
A thermoplastic elastomer composition which comprises 25-95% by weight of a polyamide and 75-5% by weight of a halogenated butyl rubber, a chlorosulfonated polyethylene or both thereof. Said composition is excellent in resistance to Freon gas permeation and has good oil resistance and low-temperature resistance. A hose wherein the layer to be contacted with a gas is made of the above thermoplastic elastomer composition is suitable as a Freon gas R-22 hose.
摘要:
A catalyst consisting essentially of (A) a cobalt compound and (B) an organic phosphorus compound represented by the formula: ##STR1## wherein R.sup.1 and R.sup.2 are independently hydrogen atoms, alkyl groups or aryl groups, and three X's, which may be the same or different, are electron-donating groups. This catalyst is effectively used in a process for producing a conjugated diene polymer by polymerizing a conjugated diene in a hydrocarbon or halogenated hydrocarbon solvent in the presence of the above catalyst together with (C) an organoaluminum compound and (D) 0.25-1.5 mols, per mol of the organoaluminum compound (C), of water.
摘要:
A polymer composition which comprises a polymer, a phosphorus compound (a), and a phenol compound (b). The phosphorus compound (a) is, e.g., at least one member selected from compounds represented by the following formula (1). The phenol compound (b) is, e.g., at least one member selected from compounds represented by the following general formula (4), wherein in the general formula (1), the R1 represents C1-20 alkyl, allyl, cycloalkyl, phenyl, or alkoxyalkyl and n is 1 or 2, provided that when two R1's are present, then the R1's may be the same or different, wherein in the general formula (4), the R4's each independently represents C1-20 alkyl, allyl, cycloalkyl, phenyl, alkoxy, or alkylthiomethyl.
摘要:
In order to detect microwaves from radar type speed measurement devices and microwaves leaking out of reverse detectors without being detected by such reverse detectors, a microwave detector is provided with a super-heterodyne type reception circuit for cyclically performing reception operations to receive target microwave frequencies of prescribed microwave bands, the reception circuit including a first local oscillator which can carry out a fixed oscillation at a prescribed frequency or a sweep of a prescribed frequency range established slightly outside the frequency range of the local oscillator of a reverse detector, and a plurality of second local oscillators having different oscillation frequencies, whereby the reception circuit is able to receive microwaves in the target bands and microwaves leaking out of the local oscillator of a reverse detector.
摘要:
An aqueous dispersion of polymer particles each consisting essentially of (a) a syndiotactic 1,2-polybutadiene having 70% or more of unsaturated hydrocarbon groups in the side chains and having a melting point of 70.degree. C. or higher, (b) a polymer mixture of said polybutadiene (a) and other polymer in the form that (a) and (b) co-exist in the same particle, or (c) a copolymer obtained by graft-polymerizing a conjugated diene and/or other polymerizable monomer on said polybutadiene (a), each of said particles having an average diameter of 10 .mu.m or less. Said aqueous dispersion can be produced by a process comprising steps of adding, to an aqueous dispersion of a first catalyst component solution, a conjugated diene monomer and a second catalyst component and polymerizing said conjugated diene monomer, characterized in that the first catalyst component solution contains (A) a cobalt compound, (B) at least one member selected from the group consisting of alkali metals, organometallic compounds of metals of Groups I to III of the Periodic Table and hydrides of metals of Groups I to III of the Periodic Table, and (C) 1 to 1,000 moles, per mole of the cobalt compound (A), of a conjugated diene compound and then the second catalyst component is at least one compound selected from the group consisting of carbon disulfide, phenylisothiocyanic acid and a xanthogen compound.
摘要:
A conjugated diene sulfonation product represented by the formula (I): ##STR1## wherein R.sup.1 to R.sup.6, which may be the same or different represent hydrogen atoms, alkyl groups having 1 to 8 carbon atoms, aryl groups having 6 to 20 carbon atoms or --SO.sub.3 X groups (X represents a hydrogen atom, a metal atom, an ammonium group or a quaternary ammonium group), at least one of said R.sup.1 to R.sup.6 being the --SO.sub.3 X group, a polymer of the conjugated diene sulfonation product or a copolymer of the conjugated diene sulfonation product with a monomer copolymerizable therewith. The sulfonation product, the polymer and the copolymer are useful as a dispersing agent for preparing a solid fuel dispersion, a cement dispersion, a dye and/or pigment dispersion or a metal oxide dispersion or as a water-treating agent, a fiber-treating agent, a plating bath additive and an excavation-muddy water-viscosity-adjusting agent.
摘要:
A vibration sensor is secured to an object whose vibrations are to be sensed, and includes a vibration plate capable of resonating at one of first resonance frequencies within a specific high frequency region of the frequencies at which the object can vibrate. A vibration element capable of resonating at one of second resonance frequencies within a specific low frequency region of the frequencies at which the object can vibrate is connected to the vibration plate so that the vibration resulting from the resonance of the vibration element is transmitted to the vibration plate. Further, a piezoelectric transducer element is fixed to the vibration plate, and is able to generate an electric signal in response to the stress applied by the vibration plate when this plate vibrates. Thus, it is possible, with a single sensor, to sense both vibrations composed of relatively high frequency components and vibrations composed of relatively low frequency components.
摘要:
A toner cartridge employed in an electrophotographic printer and capable of attachment to or detachment from the electrophotographic printer. The toner cartridge includes a stirring member (4) which touches the inner wall of the cartridge (100) to reliably stir the toner contained in the cartridge (100). The stirring member (4) is rotatable and is interlocked with a gear (5) which is rotated by an external drive force.