Abstract: A membrane filter material formed from a solvent resistant bimaleimide polymer which is formed by polymerizing a bismaleimide compound with a perhydrodiaza-type heterocyclic compound and has a main structural skeleton represented by the following formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represents a lower carbon chain which is linear or contains a methyl group or ethyl group on the side chain, R.sub.5 represents a divalent group containing an aromatic ring, Y is >R< or >N--R--N< in which R is a lower carbon chain, and m is 0 or 1.This bismaleimide polymer can be a membrane filter material having an excellent organic solvent resistance. When this polymer is formed into a hollow fiber or plain film, a high separating and filtering capacity and an excellent organic resistance can be attained.

Abstract: A blowing agent composition for use in preparing a polyurethane foam, which is a mixture of dichlorotrifluoroethane and at least one of paraffins having 5 and 6 carbon atoms in a weight ratio of from 97:3 to 70:30.

Abstract: A lock device of a door for a cargo room of a wagon type vehicle includes a main lock member disposed at the upper edge of a lower door and having a latch and a ratchet for preventing the reverse rotation of the latch; a main striker disposed at the lower edge of the upper door and engaging with the main lock member; side lock members disposed on both right and left sides of the lower side door; two side strikers engaging with the side lock members; a key operation member disposed on the outer surface of the lower door and releasing the engagement between the main lock member and the main striker; and a door opening handle disposed on the outer surface of the lower door and releasing the engagement between the side lock members and the side strikers.

Abstract: Disclosed in this invention are optical recording media comprising a substrate, a recording layer formed on the substrate and a protective layer formed on the recording layer, in which the recording layer is irradiated with a beam of energy, thereby causing the change of optical properties at the irradiated portions on the recording layer so as to record information,wherein said recording layer is a thin film containing Te and N, and further Pd, if necessary, and producing methods thereof.

Abstract: Chlorine is produced by reacting hydrogen chloride and oxygen in the presence of a chromium oxide catalyst in a reactor whose catalyst-contacting part is lined with one of lining materials represented by the following general formula(I):M.sub.a X.sub.b (I)wherein M means boron, aluminum, silicon, titanium, zirconium or chromium, X denotes oxygen, nitrogen or carbon, a is an integer of 1-2 and b stands for an integer of 1-3 or with a mixture of at least two of the lining materials. The above process and reactor are effective in maintaining the activity of the catalyst.

Abstract: This invention relates to a reinforcement member to be mounted internally in the doors of an automobile, and more particularly to the member comprising two parallel flat members and one or two corrugated members which connect said two parallel members in such a manner as to position the ridges of folds thereof perpendicular to the surfaces of the plate members. The reinforcement member is mounted internally in car doors. When the car receives an impact from the side of the door, the corrugated surfaces of the member can distribute the impact evenly by deforming themselves into a fan-like shape to thereby prevent the door from being abruptly folded at one point.

Abstract: An optical output controlling method according to the present invention is employed in an optical system in which a polarized light is illuminated on a magneto-optical material, and in which the light reflected by the magneto-optical material is passed through a polarization beam splitter and then detected through an analyzer. An optical output can be adjusted by rotating the polarization beam splitter. In consequence, the Kerr rotation angle caused by the magneto-optical material can be increased, and the carrier to noise ratio can be thereby improved.

Abstract: Dyed denim cotton yarns capable of meeting the market demand for color jeans can be provided by immersing denim cotton yarns in a dye bath containing a dye or dye composition comprising a specific indirubin derivative(s), a specific quinophthalone derivative(s) and/or an indigo dye, squeezing and air-oxidizing the dyed yarns, and repeating a series of these steps.

Abstract: Disclosed is a process for producing an aromatic carbonate which comprises reacting a phenolic compound with a di-aliphatic carbonate or an aliphatic-aromatic carbonate in the presence of a catalyst. The catalyst is either SnO and/or a tin compound represented by the following formula ##STR1## wherein X and Y are identical or different and each represents OH, SCN, OR.sup.1, OCOR.sup.1 or a halogen atom, R.sup.1 represents an alkyl or aryl group, X and Y are not alkoxy groups at the same time, and R represents an alkyl or aryl group; or at least one compound of an element selected from the group consisting of Sc, Cr, Mo, W, Mn, Au, Ga, In, Bi, Te and lantanoids. The use of these specific catalysts enables the product to be obtained in high yields and selectivities and makes it easy to purify the product.

Abstract: A crystalline saturated polyester resin such as polyethylene terephthalate, is molded into a desired shape in a molding machine under conditions such that the crystallization temperature of the resulting molded article is within 20.degree. C. of the crystallization temperature of the starting saturated crystalline polyester resin. This is accomplished by preheating the resin in the molding apparatus to a temperature above its melting point to lower the viscosity of the resin to such an extent that the resin is not substantially degraded in the compression section of the molding machine. By avoiding reductions in the crystallization temperature of the molded resin, the resin can be shaped by, for example, blow molding into a bottle or other configuration while satisfying simultaneously the requirements for transparency and dimensional stability.

Abstract: In accordance with the present invention, there are provided information recording media having a substrate and thereon a recording layer, and a metallic layer composed of an aluminum alloy containing at least hafnium. The information recording media provided are excellent in corrosion resistance and also small in dependence of the recording power on linear velocity.

Abstract: A film-forming apparatus comprising a high-frequency application electrode and an earth electrode. The high-frequency applying electrode has an uneven surface with projections and recesses. An amorphous silicon film is formed uniformly on a substrate at a high speed by feeding a silicon-based gas into this apparatus and generating a glow discharge between the high-frequency application electrode and the earth electrode, and positioning the substrate in an atmosphere of the generated glow discharge.

Abstract: A cayalyst precursor is produced by reacting V.sub.2 O.sub.4 with phosphoric acid in an organic solvent in the presence of a polyol. The catalyst precursor is calcined to obtain a catalyst having a high density, highly attrition-resistance and a large specific surface area and requiring only a low temperature for the oxidation of butane.

Abstract: A tantalum thin film circuit which is formed on an insulator or semiconductor substrate through an adhesive layer, a part or the entire surface of said tantalum thin film circuit being coated with a metal selected from among palladium, gold, platinum and rhodium or an alloy thereof. In addition, a conductive film circuit is formed on the thus formed tantalum thin film circuit by forming an interlayer insulating film having an adhesive layer on each of the upper and lower sides thereof, and forming a circuit using a metal selected from among tantalum, palladium, gold, platinum and rhodium or an alloy thereof.

Abstract: There is provided a novel organic hydroperoxide, 3-(2-hydroperoxy-2-propyl)phenol. The hydroperoxide is produced by oxidizing 3-(2-hydroxy-2-propyl)phenol or m-isopropenylphenol with hydrogen peroxide in the presence of an acid catalyst.There is further provided a method of producing resorcinol which comprises decomposing the 3-(2-hydroperoxy-2-propyl)phenol in the presence of an acid catalyst.

Abstract: A purification process for methyl methacrylate (MMA) and a recovery process for methanol are disclosed. A mixture, which contains water, methanol and methyl methacrylate (MMA) as principal components along with at least one of methyl acrylate, methyl propionate and methacrylic acid, is azeotropically distilled together with hexane to obtain MMA in a form substantially free of water, methanol methyl acrylate, methyl propionate and hexane and a low boiling-point fraction. The low boiling-point fraction is cooled and separated into a water phase and an oil phase. Methanol can be recovered from the water phase by adding an alkaline substance to it and then distilling the resultant mixture. A preparation process of MMA is also disclosed. MMA can be prepared by esterifying methacrylic acid or methacrylamide with methanol and then applying the above purification process.

Abstract: A catalyst formed from(A) a solid titanium catalyst component containing magnesium, titanium, halogen and a polycarboxylic acid ester as essential ingredients and being obtained by contacting a magnesium compound, a titanium compound and a polycarboxylic acid ester,(B) an organoaluminum compound, and(C) an organosilicon compound represented by the following formula (1)SiR.sup.1 R.sup.2 (OR.sup.3).sub.2 (1)wherein R.sup.1 is selected from the class consisting of linear alkyl groups having at least 3 carbon atoms and arylalkyl groups in which the alkyl moiety has a secondary or tertiary alpha-carbon atom, R.sup.2 is selected from the class consisting of alkyl groups and arylalkyl groups in which the alkyl moiety has a secondary or tertiary alpha-carbon atom, and R.sup.3 is a hydrocarbon group, with the proviso that when R.sup.1 is a linear alkyl group having at least 3 carbon atoms and R.sup.2 is an alkyl group, the alkyl group for R.sup.

Abstract: A thermosetting resin composition formed of a polyaminobismaleimide resin, which is composed of a bismaleimide compound and a diamine compound, and a powdery inorganic filler. The composition has excellent heat resistance as well as superb mechanical properties at high temperature not to mention room temperature, and is expected to find wide-spread commercial utility in electric and electronic components such as sealing materials, sockets and connectors and other applications.

Abstract: Odorless or absolutely ordorless multi-valent metal-modified salicylic acid. The former copolymers are obtained by condensing salicylic acid with a benzyl aldehyde, reacting the resultant resin with a styrene derivative and reacting the resin thus-obtained with a multivalent metal salt. The latter copolymers are obtained by adding water dropwise to the resultant multi-valvent metal-modified resin at a temperature above the boiling point of water to remove completely volatile matters.

Abstract: A dust-proof film is made from a material which contains a cellulose ester and whose transmittances of light having a wavelength of 365 nm and a wavelength of 436 are 98% or more, or the dust-proof film is formed of cellulose propionate whose weight average molecular weight using polystyrene as a reference is 60,000-400,000. The dust-proof film has a long life and excels in light resisting properties with respect to the i-line. In addition, the dust-proof film is useful as a long-life pellicle for a broad line and exhibits high light transmittance properties with respect to both the i-line and the g-line.