Abstract: The present invention provides a method of manufacturing a composite material made of a rubber and a clay mineral dispersed uniformly therein. The method proceeds exchanging inorganic ions of the clay mineral with organic onium ions to organize the clay mineral; mixing the organized clay mineral and a process oil and/or a plasticizer; and mixing the rubber material with the mixture of the organized clay mineral and the process oil and/or the plasticizer. Process oil and/or plasticizer are intercalated into the organized clay mineral. As a result, the interlayer distance of the clay mineral is enlarged. The most favorable mode of the present invention is for a barrier material against water, gas and the like and for a rubber material required for an improved mechanical property.

Abstract: An ethylene propylene rubber blend containing an ethylene-.alpha.-olefin-diene copolymer as the rubber component of the blend. The ethylene-.alpha.-olefin-diene copolymer has a propylene content of about 43% to about 51% by weight, an iodine value of about 33 to about 39, a Mooney viscosity (ML.sub.1+4 100.degree. C.) of about 34 to about 44, and a molecular weight distribution (M.sub.W /M.sub.N) of about 5 or less. The ethylene propylene rubber blend can be used, for example, for formulating articles such as hoses, and in particular brake hoses. At least an inner tube provided inside the hose is preferably formed of the ethylene propylene rubber blend. The ethylene propylene rubber blends have a modulus of elasticity not significantly dependent upon temperature and are excellent in compression set and processability.

Abstract: Original image data which are inputted are processed to selectively detect only a color stain among luminance irregularities which are caused by abnormalities of color filters of a color LCD panel. Black defects darker than a surrounding area which contain white defects brighter than a surrounding area are extracted, or white detects which contain black defects are extracted, by processing the original image data.

Abstract: An image data processing method by which stripped brightness non-uniformities of a very low contrast can be detected accurately from an input multiple-valued digital image data. The method includes (1) the first step of producing a first emphasis image data from the input image data by first line segment emphasis filtering processing for emphasis of line segments at least of a predetermined direction and producing a binary image data from the first emphasis image data by first threshold value processing, and (2) the second step of producing a second emphasis image data from the binary image data by second line segment emphasis filtering processing for emphasis of line segments of the predetermined direction and extracting the line segments of the predetermined direction from the second emphasis image data by second threshold value processing. Through the method, the line segments of the predetermined direction arranged in a juxtaposed relationship from each other are selectively detected.

Abstract: A layered molding and method for making the same which has excellent antipermeability to gasoline. The layered molding is defined by a fluoroplastic and an epichlorohydrin rubber. The fluoroplastic is a copolymer formed from at least two precursors selected from the group consisting of hexafluoropropylene, tetrafluoroethylene, and vinylidene fluoride, which are selected within a plotted range to preferably form a binary or tertiary composition. The epichlorohydrin rubber contains organic phosphonium. The resulting layered molding does not require an adhesive agent.

Abstract: The present invention relates to an acrylic rubber composition comprising a copolymer composition comprising ethylene monomer units and acrylic acid ester monomer units as main components, wherein said copolymer composition contains an epoxy group-containing cross-linkable compound in an amount of 1.2 to 3.0% by weight (wt %) and said rubber composition contains an isocyanuric acid and a quaternary ammonium salt as vulcanizing agents, and a rubber hose having at least one layer comprising the above acrylic rubber composition vulcanized.

Abstract: A fuel absorbent is provided in which polymer particles having a fuel absorbing ability are contained or dispersed in a binder matrix permeable to fuel. The fuel permeates the binder and is absorbed by the polymer particles. A process is provided for making the fuel absorbent by mixing polymer particles having fuel absorbing ability with a binder dissolved in a solvent, to thereby obtain a dispersion mixture having the polymer particles dispersed therein. The dispersion mixture is then dried to cause the polymer particles to be dispersed in a matrix of the binder. The fuel absorbent has excellent durability and fuel absorbing/desorbing ability.

Abstract: A multi-layer rubber hose in which a fluorinated rubber (FKM) layer and a nitrile rubber (NBR) layer adjacent thereto have been vulcanization-adhered to each other. The FKM layer is formed from the vulcanizate of an FKM compound containing a ternary FKM as a polymer component. The vulcanization system is an organic polyol system and a quaternary ammonium salt, and the vulcanization induction time (T.sub.10) satisfies the following equation, 4 minutes .ltoreq.T.sub.10 +determined vulcanization temperature -170.degree. C.) minutes/10.degree. C..ltoreq.7 minutes. The NBR layer is formed from the vulcanizate of the NBR compound, and the NBR comound is a stock rubber into which a functional group having an active hydrogen has been introduced. The vulcanization system is an oragnic peroxide system. The multi-layer rubber hose of the presnt invention is suitable as a fuel hose for cars and has a high resistance to gasohol.

Abstract: An ethylene-propylene rubber composition vulcanizable with sulfur in which the rubber component totally or mainly composed of EPDM is incorporated with a zinc oxide, a carbon black, and other ingredients. The EPDM has an iodine value of 20 to 35 and an active zinc oxide is incorporated therein as the zinc oxide in an amount of 1 to 10 PHR. Even with a sulfur vulcanization system, this ethylene-propylene rubber composition is permitted to have compression set resistance equivalent to that of conventional SBR and is improved in heat resistance as well.

Abstract: Using a treating solution which is easy to dispose after use, the surface of a plastic material is treated so that the treated surface has good adhesion to a coating film to be formed thereon. An aqueous dispersion containing an abrasive which is harder than a plastic material to be surface-treated, is pressurized to about 1.0-200 kg/cm.sup.2 and then is injected onto the surface of said plastic material through an injection nozzle. An airless spray gun having said injection nozzle is supported by a polyaxis type or articulated type robot. Thus, the surface of a plastic material is ground and converted into a rough surface and then coatings are applied thereon.

Abstract: The disclosure describes a peroxide curing rubber composition with good heat characteristics and which has physical properties such as oil resistance and tensile strength similar to conventional sulfur cured rubber compositions. The rubber composition is useful for high heat applications such as a radiator hose.

Abstract: A flexible heat and gasoline resistant rubber laminate having high interlaminar adhesion consisting of a rubber layer (1) consisting a blend of (a) acrylic polymer derived from plasticized crosslinkable acrylates and an unsaturated epoxy group containing compound and (b) a vinylidene fluoride resin, laminated to a rubber layer (2) consisting essentially of crosslinked acrylic polymer derived from plasticized crosslinkable acrylates and unsaturated epoxy group consisting compounds.

Abstract: An acrylic rubber composition comprising (A) a copolymer and (B) a crosslinking agent, said copolymer (A) consisting essentially of (a) from 3 to 10% by weight of ethylene, (b) from 0 to 10% by weight of at least one crosslinkable monomer selected from the group consisting of monomers of the formulas (1), (2), (3) and (4): ##STR1## wherein R.sub.1 is hydrogen or methyl, ##STR2## wherein R.sub.2 is vinyl, allyl or methallyl, ##STR3## wherein R.sub.3 is hydrogen or methyl,R.sub.4 OOC--CH.dbd.CH--COOH (4)wherein R.sub.4 is methyl, ethyl, propyl, butyl, methoxymethyl, methoxyethyl, methoxypropyl, methoxybutyl, ethoxybutyl, ethoxyethyl, ethoxypropyl or ethoxybutyl, and (c) from 80 to 97% by weight of other copolymer component, said other copolymer component (c) consisting essentially of (i) from 0 to 10% by weight of vinyl acetate, (ii) from 20 to 45% by weight of ethyl acrylate and (iii) from 45 to 70% by weight of n-butyl acrylate, the total amount of constituents (i), (ii) and (iii) being 100% by weight.

Abstract: The cold resistance of chloroprene rubber can be improved by blending an ester derived from a specified glycol component and a specified fatty acid component without any adverse effect upon the other physical and chemical properties of the rubber. This ester is not extracted with oily matters such as oil or grease, so that the resulting chloroprene rubber composition hardly exhibits a decrease in cold resistance even after extraction with oily matters.

Abstract: A rubber laminate of a fluororubber layer and an NBR layer firmly bonded through vulcanization is provided. The fluororubber layer is made of a fluororubber compound containing a peroxide vulcanizing agent, polyol vulcanizing agent, or polyamine vulcanizing agent. In the case where the fluororubber compound contains a peroxide vulcanizing agent, it further contains a metal oxide. The NBR layer is made of a functional NBR having a specific functional group which is determined according to the vulcanizing agent contained in the fluororubber compound. In the case where the fluororubber compound contains a peroxide vulcanizing agent or polyol vulcanizing agent, the NBR compound further contains a metal oxide. The two layers are firmly bonded through vulcanization. This rubber laminate is used for automotive fuel hoses and fuel pump diaphragms.

Abstract: An oil resistant diaphragm having a liquid contacting surface made of a vulcanized rubber composition of, or composed mainly of, partially hydrogenated unsaturated nitrile-conjugated diene copolymer rubber in which at least 50% of the conjugated diene units is hydrogenated. This diaphragm is superior in resistance to deteriorated gasoline and low temperature, and is suitable for the automobile fuel pump.

Abstract: An oil resistant rubber hose having an internal layer made of a vulcanized rubber composition of, or composed mainly of, partially hydrogenated unsaturated nitrile-conjugated diene copolymer rubber in which at least 50% of the conjugated diene units is hydrogenated. This rubber hose is superior in resistance to deteriorated gasoline and low temperature, and is suitable for the automobile fuel line.