Abstract: A plastic lens which has high hardness and excellent scratch resistance and can form a transparent and uniform reflection preventing film through vacuum deposition, is produced by mixing(a) diethylene glycol bis(allyl carbonate) with(b) at least one of organic peroxides having a decomposition temperature at selected half-life value for ten hours of not higher than 80.degree. C. and(c) at least one of specifically limited peroxycarbonates having a radical copolymerizability to the diethylene glycol bis(allyl carbonate) (a), as a polymerization initiator, and polymerizing and casting the resulting mixture in a desired lens-forming mold.

Abstract: A high density boron nitride-containing sintered body consisting of 60-95% by volume of high density boron nitride and 40-5% by volume of metal alone or in admixture with a ceramic, which high density boron nitride consists of 60-95% by volume of cubic system boron nitride and 40-5% by volume of wurtzite-structured boron nitride, and which cubic system boron nitride has an average particle size of at least 5 times that of the wurtzite-structured boron nitride. The sintered body has a high cutting performance and is suitable as a cutting tool for chilled roll, ultra-heat resisting alloy, cast iron and the like.

Abstract: A diacyl peroxide composition comprising 10 to 60 parts by weight of peroxide which comprises dibenzoyl peroxide, either di-m-toluoyl peroxide, or di-o-toluoyl peroxide or m-toluoyl o-toluoyl peroxide and either benzoyl m-toluoyl peroxide or benzoyl o-toluoyl peroxide and 90 to 40 parts by weight of a solvent which dissolves the diacyl peroxides does not cause the deposition of the solid matters when kept below 5.degree. C., the phase separation nor the storage degradation for a long term and can be stored for a long time.The composition usually has peroxide components which are suitable for use in place of benzoyl peroxide and excellent in the handling and the workability.

Abstract: A method for preparing a coal-water slurry is described, comprising the divided addition of dispersing agent or multi-step addition of dispersing agent during grinding in a process for preparing a coal-water slurry by the wet grinding of coal in water.

Abstract: A gas-retaining agent consisting of bubble assemblies, each bubble assembly being one particle consisting of a large number of bubbles agglomerated into the particle, is effective for improving the safety of water-in-oil emulsion explosive compositions against methane and coal dust, for improving the sympathetic detonability of the explosive compositions and for lowering their detonation velocity without deteriorating their strength.

Abstract: A gas-retaining agent having a particle size of 177-3,000 .mu.m is effective for improving the safety of water-in-oil emulsion explosive compositions against methane and coal dust and for improving the sympathetic detonability of the explosive compositions without deteriorating their strength.

Abstract: A sizing agent for the treatment of glass fibers contains as principal components a film-forming agent, which is a copolymer of a specific unsaturated peroxycarbonate and an unsaturated monomer containing at least 70% by weight of vinyl acetate, and a coupling agent. A method for the treatment of glass fibers, which comprises causing said sizing agent to be deposited on glass fibers and subjecting the glass fibers coated with said sizing agent to heat treatment.

Abstract: A water-in-oil emulsion explosive, comprising aqueous inorganic oxidizer solution, oil, emulsifier and hollow microspheres, and having high low-temperature detonability and storage stability can be produced without causing breakage of the hollow microspheres through a specifically limited kneading method, wherein agitating blades fitted to an agitating shaft in a kneader are subjected to up and down movements in the axial directions of the agitating shaft and concurrently to a rotary motion to knead homogeneously a water-in-oil emulsion formed of the aqueous solution of inorganic oxidizer, oil and emulsifier, together with the hollow microspheres.

Abstract: A water-in-oil emulsion explosive comprising an aqueous solution of inorganic oxidizer, an oil, an emulsifier and hollow microspheres, and having high low-temperature detonability and storage stability can be produced without causing breakage of the hollow microspheres through particular emulsifying and kneading steps, in which emulsifying step the aqueous solution of inorganic oxider, the oil and the emulsifier are fully emulsified into a water-in-oil emulsion in an emulsifying machine having a novel structure, and in which kneading step the resulting water-in-oil emulsion is kneaded together with the hollow microspheres by means of agitating blades, said agitating blades being arranged in the kneader and carrying out concurrent by rotary motion and up and down movements.

Abstract: In curing an unsaturated polyester resin in the presence of an organic peroxide added thereto, 4-methyl-2,4-diphenyl-pentene-1 is added to the mixture of the unsaturated polyester resin with the organic peroxide to enhance the curing properties.

Abstract: An aqueous solution-type oxidizing agent composition consisting of an aqueous solution containing an oxidizing agent, which consists of ammonium nitrate as a main component and an inorganic chlorate, and further containing a water-soluble phosphate as a stabilizer, which is stable, inhibits the decomposition of ammonium nitrate, and has high storage stability.

Abstract: The cold flow of fuel oils is improved by adding esters of nitrogen-containing compounds having polyhydroxyl groups with linear saturated fatty acids or a combination of said esters and polymers of one or more monomers selected from the group consisting of olefins, alkyl esters of ethylenically unsaturated carboxylic acids and vinyl esters of saturated fatty acids to fuel oils.

Abstract: A photo polymerization initiator composition is disclosed. The composition is comprised of an organic peroxide and a salt selected from the group consisting of pyrylium salts, thiapyrylium salts and selenopyrylium salts represented by the general formula (I): ##STR1## the substituents are defined within the specification. By utilizing the disclosed photo polymerization initiator composition, it is possible to obtain high sensitivity even in the visible range of light.

Abstract: An industrially highly valuable novel polymeric diacyl peroxide which is used as a polymerization initiator for free radical polymerization of vinyl monomer, and which is appreciably safe in production and handling, rapidly soluble in vinyl monomer with high solubility, and has exceedingly high catalyst efficiency in the free radical polymerization of vinyl monomer.

Abstract: An oil-in-water emulsion comprising edible fats and oils, milk protein and/or vegetable protein, an emulsifier and water is disclosed. The emulsion further contains 0.2 to 6% by weight of amino acids and 3 to 40% by weight of saccharides. It is characterized by long shelf life and provides whipping cream and other creams having excellent storability.

Abstract: Compositions including the dithiocarbamic acid derivative having ##STR1## group and at least one organo-tin compound selected from the group consisting of polymers having recurring units containing organo-tin, copolymers which are copolymerized with acryl compounds or vinyl compounds and organo-tin chemicals of ##STR2## are extremely effective for preventing the adhesion of marine organisms including marine microorganisms. This effect of the said composition is enlarged in the presence of copper compounds. R.sub.1, R.sub.2, and R.sub.3 represent an alkyl or phenyl, cycloalkyl group: Z; monovalent functional group containing sulphur or oxygen: and W; divalent functional group.

Abstract: A cutting tool having a high wear resistance is disclosed. The cutting tool consists of a plate-shaped body comprising a sintered cermet layer and a sintered body layer containing high density boron nitride or diamond, said sintered cermet layer constituting the center portion of the plate-shaped body and being surrounded and adhered at the side surface or at the side surface and upper and lower surfaces with the sintered body layer.

Abstract: A stabilizer for mixed fuels containing a reaction product obtained by reacting (1) a polyol having at least 3 hydroxyl groups in the molecule and a molecular weight of 400-10,000 with (2) an epihalohydrin, as the principal component.

Abstract: A method of applying electrodeposition coating onto metallic material by continuously passing the metallic material through an electrodeposition bath comprising an alkaline-solution soluble resin, solid lubricant and water is disclosed.

Abstract: A water-in-oil emulsion explosive composition comprising an aqueous solution of ammonium nitrate alone or in admixture with the other inorganic oxidizer salt, fuel oil and/or wax, an emulsifier of dipentaerythritol fatty acid ester, polyoxyalkylenedipentaerythritol fatty acid ester, sugar fatty acid ester, polyoxyalkylenesugar fatty acid ester or sorbitol fatty acid ester, and hollow microspheres or microbubbles, has excellent storage stability in the detonation sensitivity in a small diameter cartridge and at low temperature.