Abstract: A propylene block copolymer comprising a matrix phase and a dispersed phase dispersed in said matrix phase, said matrix phase comprising (a) polypropylene; said dispersed phase having an average particle diameter of from 0.1 to 5 .mu.m; and said dispersed phase comprising an outer layer comprising (b) propylene-.alpha.-olefin copolymer rubber and an inner layer comprising (c) crystalline polyethylene dispersed therein a plurality of particles comprising an outer layer comprising (b') propylene-.alpha.-olefin copolymer rubber and an inner layer comprising (a') polypropylene, a propylene block copolymer comprising a matrix phase and a dispersed phase dispersed in said matrix phase, said matrix phase comprising (a) polypropylene; said dispersed phase having an average particle diameter of from 0.1 to 5 .mu.m; and said dispersed phase comprising (b) propylene-.alpha.

Abstract: A propylene block copolymer, a process for preparation of the propylene block copolymer, and a propylene resin composition comprising the propylene block copolymer. The propylene block copolymer comprises (a) from 35 to 95% by weight of a polypropylene block and (b) from 10 to 65% by weight of a block of a copolymer of a propylene and other .alpha.-olefins, the propylene block copolymer having: (i) in a crystallization temperature curve determined by a differential scanning calorimeter, besides a main peak, secondary peaks in a temperature range of from 90.degree. to 100.degree. C., and a proportion of the area of the secondary peaks to that of a main peak of from 1.5 to 10%; and (ii) a relationship between an amount of a soluble content on xylene extraction at 25.degree. C. and a proportion of the area of the secondary peaks to that of the main peak represented by equation (I):0.1X.sub.IS -1.ltoreq.SMA (I)wherein X.sub.IS represents an amount of a soluble content on xylene extraction at 25.degree. C.

Abstract: A multilayered laminate, which comprises a plastic substrate, a thin film of a metal or a metal oxide, formed on a surface of the substrate, and a layer formed on a surface of the thin film, the layer being selected from the group consisting of: (a) a polyvinyl alcohol copolymer emulsion, obtained by aqueous emulsion polymerization of a vinyl acetate monomer, an ethylene monomer and a polyvinyl alcohol; (b) a resin emulsion composition obtained by mixing (i) a polyvinyl alcohol copolymer emulsion, obtained by aqueous emulsion polymerization of a vinyl acetate monomer, an ethylene monomer and a polyvinyl alcohol with (ii) an aqueous solution of polyvinyl alcohol resin; (c) saponified resin of olefin-vinyl acetate copolymer; (d) polyamide resin; and (e) polyvinyl alcohol resin, and a heat-sealable packaging material based on the multilayered laminate.

Abstract: It is an object of the present invention to provide an x-ray diffractometer for measuring an x-ray diffraction pattern obtained by irradiating x-rays 6 to a sample 7, in which, even though irradiation/non-irradiation of x-rays 6 to the sample 7 are repeated, a target in an x-ray tube bulb 1 is not contaminated and a filament 3 is not thermally stressed, thus improving the practical lifetime of the x-ray tube bulb 1. To achieve this object, the x-ray diffractometer of the present invention is arranged such that x-ray irradiation/non-irradiation selecting means 17 is arranged to switch states of supply and non-supply of a tube voltage to the x-ray tube bulb 1, and that an x-ray generating power source device 11 comprises filament preliminary heating current supply means 16 for letting flow a preset current in the filament 3 of the x-ray tube bulb 1 in the state where a tube voltage is not supplied.

Abstract: A propylene block copolymer comprising a matrix phase and a dispersed phase dispersed in said matrix phase, said matrix phase comprising (a) polypropylene; said dispersed phase having an average particle diameter of from 0.1 to 5 .mu.m; and said dispersed phase comprising an outer layer comprising (b) propylene-.alpha.-olefin copolymer rubber and an inner layer comprising (c) crystalline polyethylene dispersed therein a plurality of particles comprising an outer layer comprising (b') propylene-.alpha.-olefin copolymer rubber and an inner layer comprising (a') polypropylene, a propylene block copolymer comprising a matrix phase and a dispersed phase dispersed in said matrix phase, said matrix phase comprising (a) polypropylene; said dispersed phase having an average particle diameter of from 0.1 to 5 .mu.m; and said dispersed phase comprising (b) propylene-.alpha.

Abstract: A multilayered laminate which comprises (A) at least one thermoplastic resin layer of an ethylenic copolymer having ethylene and at least one of acrylamide derivatives, methacrylamide derivatives, ester monomers, ether compounds, acid compounds having an unsaturated bond between carbon atoms, and mixtures thereof; (B) other thermoplastic resin layers; and (C) a hydroscopic gas barrier intermediate layer and a method of improving the transparency of polypropylene.

Abstract: A polyolefin composition, which comprises: (A) 1 to 99% by weight of a polyolefin having the following properties of (a) to (e); (a) a ratio of kinematic viscosity .eta..sub.1 at a frequency of 10.sup.-1 rad/sec to kinematic viscosity .eta..sub.2 at a frequency of 10 rad/sec at a temperature of 190.degree. C. according to a kinematic viscoelasticity determination method of 4 to 20, (b) a crystallization peak temperature Tcp according to a Differential Scanning Calorimetry of 110.degree. C. to 130.degree. C., (c) a ratio (Tmp/Tcp) of melting peak temperature Tmp to crystallization peak temperature Tcp according to a Differential Scanning Calorimetry of 1.1 to 1.5, (d) Tmp/(Tmp-Tcp)=3.0 to 9.8, and (e) a crystal structure exhibiting a-axial orientation in a diffraction pattern according to a X-ray diffraction method, and (B) 99 to 1% by weight of a propylene resin having the following properties of (f) and (g); (f) a ratio of kinematic viscosity .eta..sub.1 at a frequency of 10.sup.

Abstract: A propylene block copolymer comprising: (a) a propylene homopolymer part having (i) an insoluble amount on xylene extraction at 25.degree. C. of 99.0% by weight or more; (ii) an isotactic pentad fraction of 98.0% or more; (iii) an isotactic average chain length of 500 or more; and (iv) a total amount of fractions having an isotactic average chain length of 800 or more obtained in a column chromatographic separation of 10% by weight or more, and (b) a copolymer part comprising propylene and at least one of ethylene and an .alpha.-olefin having from 4 to 12 carbon atoms, the proportion of the propylene homopolymer part (a) being from 50 to 97% by weight based on the total amount of the propylene homopolymer part (a) and the copolymer part (b), and the proportion of the copolymer part (b) being from 3 to 50% by weight based on the total amount of the propylene homopolymer part (a) and the copolymer part (b).

Abstract: There is provided a stator yoke capable of improving magnetic characteristics and a rust-proofing effect of a stator yoke produced by using a Fe-Cr type alloy. When a stator yoke is produced by using a Fe-Cr type alloy, its magnetic characteristics can be improved, but when press working is made to obtain a predetermined shape, the magnetic characteristics drop. Annealing is carried out so as to recover the magnetic characteristics. This annealing generates the property change of a surface layer and a rust-proofing effect lowers.

Abstract: A polyolefin composition, which comprises: (A) 1 to 99% by weight of a polyolefin in having the following properties of (a) to (e); (a) a ratio of kinematic viscosity .eta..sub.1 at a frequency of 10.sup.-1 rad/sec to kinematic viscosity .eta..sub.2 at a frequency of 10 rad/sec at a temperature of 190.degree. C. according to a kinematic viscoelasticity determination method of 4 to 20, (b) a crystallization peak temperature Tcp according to a Differential Scanning Calorimetry of 110.degree. to 130.degree. C., (c) a ratio (Tmp/Tcp) of melting peak temperature Tmp to crystallization peak temperature Tcp according to a Differential Scanning Calorimetry of 1.1 to 1.5, (d) Tmp/(Tmp-Tcp)=3.0 to 9.8, and (e) a crystal structure exhibiting a-axial orientation in a diffraction pattern according to a X-ray diffraction method, and (B) 99 to 1% by weight of a propylene resin having the following properties of (f) and (g); (f) a ratio of kinematic viscosity .eta..sub.1 at a frequency of 10.sup.

Abstract: A propylene resin composition comprising: a polypropylelne having specific physical properties, 25.about.40% by weight; a propylene-ethylene block copolymer, 25.about.45% by weight; an ethylene-propylene rubber, 5.about.15% by weight; an ethylene-.alpha.-olefin copolymer, 5-15% by weight; and a talc, 5-30% by weight; is superior in all of the following properties concurrently: rigidity, heat resistance, impact resistance, surface hardness, etc.; and is suited for use in machine parts such as automobile parts; electric and electronic parts; packaging materials, engineering plastic substitutes, etc.

Abstract: Improved methods of removing coating films from resin substrates includes first treating the resin substrates in an aqueous alkali solution with a concentration of 0.1 wt % or more at a temperature of 110.degree. C. or more, which temperature is lower than the melting point of the substrates and then polishing the surfaces of the substrates by either bringing them into contact with each other in suitable equipment such as a screw feeder, or using an abrasive in suitable equipment such as a high-speed vessel type stirrer, or subjecting the substrates to a liquid honing process.

Abstract: A torque variation absorbing device comprises a drive body for connecting to a drive member, a driven body for connecting to a clutch mechanism, a damping mechanism disposed between the drive body and the driven body, and a hysteresis mechanism disposed between the drive body and the driven body, wherein the hysteresis mechanism includes a low friction member which is pressed by a first elastic member, a high friction member which is pressed to one of the drive body and the driven body by a second elastic member and an engaging member so as to engage the high friction member, the engaging member disposed at the other one of the drive body and the driven body.

Abstract: A thermoplastic resin composition including (A) an ethylenic copolymer containing at least one of acrylamide derivative units and methacrylamide derivative units and (B) other thermoplastic resin and a laminate containing at least one layer prepared from the thermoplastic resin composition.

Abstract: A safety operation system for a manipulator is provided with a first operation section. The first operation section has a first movable section, and outputs a first operation signal representing the position and angle of the first movable section. A failure detecting section detects failure of the first operation section on the basis of the first operation signal, and outputs a detection signal. When failure of the first operation section is not detected, a conversion section converts the first operation signal into a control signal. A second operation section has a second movable section which moves in accordance with movement of the first movable section, and outputs a second operation signal generated in accordance with movement of the second movable section. A comparison section compares the control signal with the second operation signal, and outputs a deviation signal used for opening the second movable section.

Abstract: A polycarbonate lubricating oil composition which is resistant to decomposition of the polycarbonate and the generation of carbon dioxide gas. The lubricating oil composition contains a polycarbonate lubricant, at least one compound selected from the group of epoxy compound, phenol compound, sulfur compound and amine compound, and optionally a triester phosphite or a triester phosphate compound as inhibitors to the generation of carbon dioxide gas. The lubricating oil composition are stable, have excellent lubricating properties, cleaning properties, and electrical insulating properties, and their viscosity at low temperature can readily be lowered.

Abstract: An adhesive resin composition comprises (A) 2 to 98% by weight of an ethylene copolymer resin containing 0.01 to 20% by weight of the unit of an unsaturated carboxylic acid anhydride in the main chain; and (B) 98 to 2% by weight of a resin mixture comprising (i) 50 to 90% by weight of a copolymer resin of ethylene/vinyl acetate, (ii) 40 to 9.5% by weight of a binary copolymer resin of ethylene and an .alpha.-olefin having 3 to 12 carbon atoms, and (iii) 10 to 0.5% by weight of an ethylene/propylene/unconjugated diene terpolymer. The resin mixture is obtained by mixing (i), (ii) and (iii) in a molten state and has a toluene extraction residue of 10 to 60% by weight. The adhesive resin composition is utilized as an adhesive material between layers of a multi-layer laminate and scrap or waste material from the adhesive resin composition or from the multilayer laminate can be recycled as an adhesive resin composition having excellent interlayer strength and compatibility.

Abstract: A multilayer structure is provided which has a core layer of a hygroscopic barrier material and inner and outer surface layers designed to facilitate the escape of moisture which becomes absorbed in the core layer during retort sterilization. The inner and outer surface layers include a polyolefin material which is either foamed or compounded with a filler in order to cause a substantial increase in the water vapor transmission rate of the polyolefin. Adhesive layers are present between the core layer and the inner and outer layers. Each of the inner and outer layers may include one or more individual film layers, depending on the requirements of the specific packaging application.

Abstract: A process for producing a 4,6-bis(difluoromethoxy)-2-alkylthiopyrimidine, which comprises reacting a 2-alkylthiobarbituric acid and monochlorodifluoromethane in the presence of a base in an inert solvent, wherein, for a first reaction, after charging a part of the base, the rest of the base and the monochlorodifluoromethane are simultaneously introduced to obtain a mixture of a 4-difluoromethoxy-6-hydroxy-2-alkylthiopyrimidine and a 4,6-bis(difluoromethoxy)-2-alkylthiopyrimidine, and then, for a second reaction, to this mixture, the base and the monochlorodifluoromethane are again simultaneously introduced, or the base is charged first and then the monochlorodifluoromethane is introduced.

Abstract: Disclosed herein is an antihypertensive preparation containing, as an active component, a novel quinazoline derivative represented by the following general formula or a salt thereof: ##STR1## wherein R.sup.100 means a hydrogen atom or methoxy group, R.sup.200 and R.sup.300 denote individually a hydrogen atom or lower alkoxy group, R.sup.400 is a hydrogen atom or amino group, l stands for 2 or 3, and Het is a specific hetero ring group.