Abstract: A water repellent composition comprising an emulsion prepared by emulsifying in water (A) a wax having a melting point of from 40.degree. to 90.degree. C. and (B) an olefin-maleic anhydride derivative in the presence of (C) a water-soluble alkaline compound and/or a nonionic emulsifier.

Abstract: A process for the hydrogenolysis of a coal liquid bottom containing benzene-insoluble components and having a boiling point of at least 420.degree. C., which comprises:(a) hydrogenating the coal liquid bottom at a temperature of not higher than 350.degree. C. in the presence of a catalyst comprising an alkali metal and/or an alkaline earth metal and a metal of Group VI A of the Periodic Table to reduce the content of the benzene-insoluble components in the fraction having a boiling point of at least 420.degree. C., to a level of not higher than 10% by weight, and then(b) subjecting the product to hydrogenolysis at a temperature of higher than 350.degree. C. and not higher than 450.degree. C. in the presence of a catalyst comprising a metal of Group VI A of the Periodic Table.

Abstract: A method for hydrogenating a solvent-refined coal by heating it under hydrogen pressure in a fixed bed, characterized in that a solvent-refined coal fraction containing no substantial amount of preasphaltene is used as the solvent-refined coal.

Abstract: A polycarbonate containing from 25 to 100% by weight, based on the total carbonate bond-constituting units, of carbonate bond-constituting units each containing at least one pendant aromatic group, and having an average molecular weight of from 9,500 to 14,000.

Abstract: A dual layer photoreceptor for use in electrophotography, wherein a charge transport layer containing a hydrazone compound and a binder polymer is laminated on a charge generation layer containing a titanium phthalocyanine compound of the formula: ##STR1## wherein X represents hydrogen atom, lower alkyl group, lower alkoxy group, allyloxy group, nitro group, cyano group, hydroxy group, benzyloxy group or halogen atom, Y represents halogen atom, alkoxy group or oxygen atom, n represents an integer of 1 or 2 and m represents an integer of 0 to 4, and a binder polymer, formed on an electroconductive substrate.

Abstract: A process for producing carbon black by a furnace method wherein carbon black is produced in a reaction system comprising a first zone where a mixture of a fuel hydrocarbon and an oxygen-containing gas is burned to form a high temperature combustion gas atmosphere, and a starting oil material is continuously supplied to the high temperature combustion gas atmosphere, and a second zone, as a down-stream zone subsequent to the first zone, where a carbon black-suspended hot gas formed in the first zone flows in and is rapidly cooled, characterized in that carbon dioxide or carbon dioxide and steam are supplied to the first zone and/or the second zone to bring the carbon dioxide concentration in the second zone within a range of from 15 to 70% by volume, and the retention time of the carbon black-suspended hot gas in the second zone is at least 0.2 second.

Abstract: Disclosed herein is a positive photoresist composition containing (a) a photosensitizer of 1,2-naphthoquinone diazides photosensitive-material comprising an ester of 2,3,4,4'-tetrahydroxybenzophenone in which on the average, not less than two hydroxy groups of 2,3,4,4'-tetrahydroxybenzophenone have been esterified by 1,2-naphthoquinonediazide-5-sulfonic acid and (b) a novolak resin obtained by condensing a mixture of m-cresol, p-cresol and 2,5-xylenol with formaldehyde.

Abstract: A boehmite having an orthorhombic crystal form in which the ratio of the maximum length in the direction of the a-axis of the crystal to the distance between the opposing crystal faces perpendicular to the c-axis of said crystal is at least 10, said maximum length in the direction of the a-axis of the crystal is at least 2500 .ANG. and said distance between the opposing faces perpendicular to the c-axis of said crystal is 250-900 .ANG..

Abstract: There are disclosed a novel polypeptide represented by the formula shown below or its acid addition salt or complex: ##STR1## wherein Ala represents alanine, Ser serine, Leu leucine, Thr threonine, Val valine, Gly glycine, Lys lysine, Gln glutamine, Glu glutamic acid, His histidine, Tyr tyrosine, Pro proline, Arg arginine, Asp aspartic acid, and n represents an integer of 3 to 7,and a process for producing the same comprising forming a peptide or polypeptide represented by the above formula and subjecting the structural units containing a peptide residue represented by the formula: ##STR2## wherein R represents an active ester residue, Ala, Ser, Leu, Thr and n have the same meanings as defined above,formed in any step of the reaction to cyclization reaction.

Abstract: A method for producing a separating agent having a fluorine-containing group and a hydrophilic group, wherein a cross-linking component consisting of alkylene di(meth)acrylate and/or glycerine poly(meth)acrylate, and a principal chain component consisting of ester and/or ether having therein a polymerizable vinyl group or isopropenyl group and a functional group are subjected to suspension-polymerization to obtain a cross-linked copolymer, and then the functional group in the copolymer is subjected to chemical modification with a fluorine-containing compound or with both fluorine-containing compound and hydrophilic-group-containing compound. The separating agent of the present invention consists essentially of porous cross-linked copolymer particles having porosity in a range of from 0.5 to 3 ml/g and an average particle size in a range of from 1 to 2,000 .mu.m.

Abstract: A process for purifying carbon black which contains solid impurities by removing the solid impurities thererom, which process comprises suspending said carbon black uniformly in water to obtain a carbon black aqueous slurry and subjecting the slurry to sieving treatment by an ultrasonic vibration sieving apparatus.

Abstract: A rare earth phosphor comprising a rare earth oxyhalide phosphor body and cinnamic acid which may have a hydrophobic substituent and which is adhered to or brought in contact with the phosphor body.

Abstract: A laminate composed of a fire-retardant resin composition comprising a polyolefin resin and hydrate of calcium silicate containing 30% by weight or more of platy crystals and/or needle shaped crystals with an aspect ratio of 3 or higher in sheet form and having metal sheet on both sides thereof.

Abstract: An optical disc substrate made of a polycarbonate containing from 5 to 100% by weight, based on the total carbonate bond-constituting units, of carbonate bond-constituting units having the formula: ##STR1## wherein each of Y and Z is a hydrogen atom or an aliphatic hydrocarbon group having from 1 to 6 carbon atoms, and each of X and W is an aliphatic hydrocarbon group having from 1 to 6 carbon atoms.

Abstract: The present invention relates to a process for preparing a 2-(1-hydroxyalkyl)cyclohexanone and/or a 2-alkylidene cyclohexanone. According to the present invention, the reaction of cyclohexanone with an aliphatic aldehyde is conducted in a heterogeneous system of an oil-in-water emulsion, whereby it is possible to obtain the 2-(1-hydroxyalkyl)cyclohexanone and/or the 2-alkylidene cyclohexanone in high selectivity.

Abstract: An aqueous dispersion of silicic anhydride, comprising an aqueous solvent and silicic anhydride dispersed therein, wherein the silicic anhydride has a surfacial silanol group density of from 0.3 to 3 per 100 .ANG..sup.2 and is obtained by the surface treatment of silicic anhydride produced by a dry method.

Abstract: Disclosed is a crystalline oxytitanium phthalocyanine which shows intense diffraction peaks at Bragg angles (2.theta..+-.0.2.degree.) of 9.3.degree., 10.6.degree., 13.2.degree., 15.1.degree., 15.7.degree., 16.1.degree., 20.8.degree., 23.3.degree., 26.3.degree. and 27.1.degree. in the X-ray diffraction spectrum, the intensity of the diffraction peak at Bragg angle of 26.3.degree. being most strong and the intensity of the diffraction peaks at Bragg angles between 4.degree.-8.degree. being less than 5% of the intensity of the diffraction peak at Bragg angle of 26.3.degree.. Further, disclosed is a photoreceptor for use in electrophotography, comprising at least a charge carrier generation layer in which the oxytitanium phthalocyanine above is dispersed in a binder polymer and a charge carrier transport layer laminated thereon.

Abstract: A method for reducing the phytotoxicity of agricultural machine oil in its application to an agricultural or horticultural plant to exterminate noxious insects and acarines, characterized in that, prior to or at the same time as the application of the machine oil, a sucrose fatty acid ester is applied to the agricultural or horticultural plant in an amount of from 0.1 to 50 parts by weight per 100 parts by weight of the machine oil, in the form of an aqueous solution containing from 0.001 to 1 wt/v % of the ester.

Abstract: A process for producing aromatic polyether ketones and polythioether ketones, which comprises reacting aromatic ethers or thioethers represented by the general formula: ##STR1## where each of R.sup.1 to R.sup.12 is a hydrogen atom, a halogen atom, a hydrocarbon group or an alkoxy group, n is an integer of 0 to 5, and X is an oxygen atom or a sulfur atom, with phosgene in aprotic solvent having a dielectric constant of lower than 20 and a dipole moment of lower than 3.0 in the presence of anhydrous halides of metals of Group III in the periodic table as a catalyst.

Abstract: A method for producing silicon which comprises subjecting silane and chlorine to a combustion reaction to generate a flame and thereby precipitating fine crystals of silicon.