Abstract: The invention discloses a novel modified polyvinyl butyral polymer having photocurability and heat-curability containing an ethylenically unsaturated moiety, which is introduced by the reaction of, for example, N-methylol acrylamide with a part of the hydroxyl groups, in addition to the vinyl butyral moiety, vinyl acetate moiety and vinyl alcohol moiety constituting conventional polyvinyl butyral resins. The inventive polymer is useful for various types of adhesives, coating materials, interlayers of laminated shatter-proof glass and the like similarly to unmodified polyvinyl butyral resins but with a possibility of broadened utilizability and absence of the problems due to evaporation of organic solvents.

Abstract: The primer composition of the invention is particularly useful as an undercoating composition for a protective overcoating formed with a silicone-based coating composition containing a colloidal silica powder in respect of the excellent adhesion, heat resistance, resistance against hot water and weatherability of the overcoating layer.

Abstract: A method of producing a heat exchanger comprising abutting a tube made of an aluminum material and fins made of an aluminum material, applying to the resulting abutments a flux containing zinc halide, and thereafter conducting a reaction soldering in an inert gas atmosphere. The assembled tube and fins applied with the flux may be moved in a position to enhance the formation of zinc deposited by the reaction soldering during the drying step of the flux. The heat exchanger produced by this method has a thick and uniform Zn coating at the joints with good mechanical strength and surface conditions.

Abstract: A magnetic recording medium, comprising a substrate, a ferromagnetic film layer formed on the surface of said substrate, and a back coating layer deposited on the other surface of said substrate and formed of a mixture produced by dispersing a powdered non-magnetic substance in a binder containing therein a thermosetting resin and at least one lubricant selected from the group consisting of fatty acids and fatty acid ester.

Abstract: A novel organopolysiloxane compound is disclosed which is capable of being cured by crosslinking and exhibiting a liquid-crystalline phase even in a crosslinked condition. The organopolysiloxane has mesogenic groups bonded to the silicon atoms such as --CH.sub.2).sub.3 O--Pn--CO--O--Pn--CN; --CH.sub.2).sub.3 O--CH.sub.2).sub.3 O--Pn--CO--O--Pn--CN; --CH.sub.2).sub.3 O--Pn--CO--O--Pn--F; and --CH.sub.2).sub.3 O--Pn--CO--O--Pn--O--CH.sub.3, in which the symbol Pn denotes a 1,4-phenylene group, and hydrolyzable groups pertaining to the crosslinking reaction.

Abstract: This invention relates to the parenteral administration of cobalt protoporphyrin and cobalt mesoporphyrin to suppress the endocrine system of animals to achieve physiological effects such as suppression of the production of gonadal or thyroid hormones, control of weight gain and improved protein to fat ratio.

Abstract: A membrane of an ionic pendant-containing, water-insoluble copolymeric poly(amino acid) composed of a first moiety derived from a first amino acid which gives a water-soluble poly (amino acid) with ionic groups of carboxyl and/or amino groups as the pendants to the molecule, e.g., glutamic acid, aspartic acid, lysine and ornithine, and a second moiety derived from a second amino acid which gives a water-insoluble poly (amino acid), e.g., leucine, alanine and methionine, in a specified molar proportion serves as a functional element of an electronic device such as a non-linear resistor capable of working in an aqueous medium and exhibiting a non-linear voltage-current relationship or a phenomenon of hysteresis in the voltage/current scanning.

Abstract: Solid medicament forms, such as granules, beads, tablets, are first coated with a hot aqueous dispersion of a cellulose ether, which is soluble in cold water but insoluble in hot water, and then subjected to a wax treatment with heating to form a masking layer of the wax. Different from the coating film of a cellulose ether formed by using an aqueous or organic solution of the cellulose ether, the coating film formed by using the aqueous dispersion of the cellulose ether has a porous structure so that the amount of the wax deposited in the wax treatment is much larger than in the prior art methods to exhibit a high effect of masking the bitterness of the ingredient contained in the medicament form.

Abstract: The photocurable organopolysiloxane composition is curable by irradiation with ultraviolet light into a rubbery elastomer which is excellently adhesive to the surface of the substrate on which it has been cured. The composition comprises an organopolysiloxane having, in a molecule, at least one acryloxy-functional group represented by the general formula[CH.sub.2 .dbd.CR.sup.1 --CO--O--(CH.sub.2).sub.a --SiR.sub.2 --O--].sub.b (R).sub.3-b Si--R.sup.2 --,in which R.sup.1 is a hydrogen atom or a methyl group, each R is a monovalent hydrocarbon group, R.sup.2 is an oxygen atom or a divalent hydrocarbon group and each of the subscripts a and b is 1, 2 or 3, as the principal ingredient together with an acryloxy-containing trialkoxy silane represented by the general formula(R.sup.3 O).sub.3 Si--R.sup.4 --(NH--CO--O--R.sup.4).sub.c --O--CO--CR.sup.1 .dbd.CH.sub.2,in which each R.sup.3 is a monovalent hydrocarbon group, each R.sup.4 is a divalent hydrocarbon group having 1 to 20 carbon atoms, R.sup.

Abstract: The invention proposes use of ammonia water in place of a conventional caustic alkali or amine compound as a catalyst in the siloxane rearrangement reaction for the preparation of a silicone-based pressure-sensitive adhesive between a poly(diorganosiloxane) having a linear molecular structure and another organopolysiloxane composed mainly of the monofunctional organosiloxane units and tetrafunctional siloxane units. The ammonia water after completion of the reaction can be easily and completely removed by distillation so that the resultant adhesive product is free from any alkaline residue of the catalyst to be imparted with greatly improved stability against viscosity changes and excellent electrical properties along with high reproducibility of the product quality.

Abstract: The cigarette lighter of the invention has an igniter member which promotes smooth burning of the fuel gas ejected from the gas nozzle. The igniter member is composed of an igniting element which is a coiled wire of platinum metal or a platinum-based alloy having a specified dimensions and a supporting member made of a wire of a refractory metal or alloy. The coil of platinum wire preferably has a flattened configuration to cover a larger front of the flame. The supporting member made of a wire of a refractory metal or alloy, around which the coil is wound, is preferably coated with a coating layer of a ceramic material, e.g., alumina. A simple but very reliable structure for mounting the igniter member in the fire bowl of the cigarette lighter is described.

Abstract: High-quality ceramic bodies suitable for use as a substrate of electronic devices can be prepared by sintering, at an outstandingly low temperature of 1000.degree. C. or below, a binary powder mixture composed of 30-50% by weight of a non-glassy phase of aluminum oxide and 70-50% by weight of a glassy phase having a quaternary composition composed of silicon dioxide, boron oxide, aluminum oxide and one or more of alkaline earth metal oxides, of which at least 60% by weight is strontium oxide, each constituent being formulated in a specified weight fraction. The ceramic body is particularly advantageous over conventional ones, along with the high mechanical strengths and low dielectric constant, in respect of the resistance against migration of metals therethrough when the ceramic body is in contact with metal-made parts such as electrodes.

Abstract: Microcapsules are prepared by adding a methylolated melamine or methylolated urea to an aqueous emulsion of the core material dispersed in an aqueous solution of a styrene/maleic anhydride copolymer partially hydrolyzed in an alkaline condition and heating the mixture at 40.degree. to 90.degree. C. in an acidic condition so that a reaction product forming the capsule walls is produced by the esterification reaction between the carboxyl groups in the partial hydrolysis product and the methylol groups in the methylolated melamine or urea and the amidation reaction between the carboxylic anhydride groups in the former and the amino groups in the latter. By virtue of the three dimensional network structure, the capsule walls are very dense and highly resistant against heat, water and solvents.

Abstract: A water-based photopolymerizable resin composition is disclosed which is suitable for the preparation of a relief printing plate by the photolithographic techniques. The inventive composition, which basically comprises a water-soluble polymer, e.g., poly(vinyl alcohol), a photopolymerizable monomer and a photopolymerization initiator, is characterized in that at least a part of the photopolymerizable monomer is N-tetrahydrofurfuryloxymethyl acrylamide or N-tetrahydrofurfuryloxymethyl methacrylamide. By virtue of this unique ingredient in the composition, the printing plate prepared from the inventive composition is imparted with improved fidelity of pattern reproduction and durability in printing as a consequence of increased hardness and pliability to be freed from the drawback of crack formation in printing even on a cylinder of small diameter under a cold and low-humidity condition.

Abstract: 3',4'-anhydrovinblastine, a precursor of the anti-tumor alkaloids vincristine and vinblastine, is prepared by the enzymatic coupling of catharanthine and vindoline using an iron-containing compound such as peroxidase optionally in the presence of a peroxide. Substantially enhanced yields are obtained.

Abstract: The pressure-sensitive adhesive of the invention comprises a latex of natural rubber graft-copolymerized with 2 to 10% by weight of styrene and 10 to 25% by weight of methyl methacrylate and a finely divided particulate material having no thermoplasticity such as silica gels and zeolites in an amount of 5 to 30 parts by weight per 100 parts by weight of the natural rubber. The pressure-sensitive adhesive has excellent characteristics in the adhesive bonding, resistance against blocking, frictional behavior, heat resistance and abrasion resistance and also is free from the trouble of decrease in the adhesive bonding strength caused by the transfer of a silicone oil from the roller of printing machines.

Abstract: A novel and efficient synthetic route is proposed for the preparation of (Z,E)-9,12-tetradecadienyl acetate as a sex pheromone compound used for population control of the pest insects belonging to the genus of Spodoptera via an intermediate 1-halo-(Z,E)-7,10-dodecadiene, which is a novel compound not known in the prior art. This novel compound is synthesized by reacting a Grignard reagent XMgC.tbd.C(CH.sub.2).sub.6 X,X being Cl or Br, with (E)-2-butenyl chloride or bromide to form an ene-yne compound of the formula CH.sub.3 CH.dbd..sup.(E) CHCH.sub.2 C.tbd.C(CH.sub.2).sub.6 X and then partially hydrogenating this ene-yne compound.

Abstract: An efficient method is proposed for the synthesis of an unsaturated alcohol of the general formula R--CH.dbd.CH(CH.sub.2).sub.n+1 OH, in which R is a hydrogen atom or a monovalent hydrocarbon group having 1 to 10 carbon atoms and the subscript n is an integer in the range from 3 to 10, in which an acetate of the formula R--CH.dbd.CHCH.sub.2 OCOCH.sub.3 is subjected to a coupling reaction with a Grignard reagent of the formula X.sup.1 Mg(CH.sub.2).sub.n OMgX.sup.2, in which X.sup.1 and X.sup.2 are each a halogen atom, and then the reaction product is hydrolyzed. When the reaction product of the coupling reaction is reacted with acetic anhydride instead of hydrolysis, the corresponding acetate can readily be obtained. These unsaturated alcohols and acetates form a class of important biologically active compounds or intermediates thereof including sex pheromone compounds of insects.

Abstract: A positive-working photoresist composition suitable for fine patterning in the manufacturing of semiconductor devices such as VLSIs with high fidelity is proposed. The composition comprises: (A) 100 parts by weight of a phenolic novolac resin prepared by the condensation reaction of a specific ternary mixture of three kinds of phenolic compounds and formaldehyde; and (B) 20-60 parts by weight of a photosensitizer which is preferably an ester of naphthoquinone diazidesulfonic acid and a hydroxylated benzophenone compound. The phenolic mixture is composed of 10-45% by weight of m-cresol, 35-88% by weight of p-cresol and 2-30% by weight of a substituted phenol represented by the general formula R.C.sub.6 H.sub.4.OH, in which R is a monovalent aliphatic hydrocarbon group having 2-6 carbon atoms selected from alkyl and alkenyl groups.

Abstract: The undercoating composition of the invention, useful for providing an undercoating layer for a top coat of a photosensitive resist layer on a substrate surface, comprises, as a principal ingredient thereof, a condensation product obtained by the condensation reaction between a hydroxy-substituted diphenylamine and a melamine compound substituted on the nitrogen atoms with methylol groups and/or alkoxymethyl groups. The undercoating obtained of the composition is highly resistant against the attack by the overcoating solution applied thereon so that the fidelity of the pattern reproduction by the photolithographic technique is greatly improved by virtue of the absence of any disorder at the interface between the undercoating and top coat layers. The advantage is further increased when the undercoating composition further comprises a photoextinctive agent, e.g. a dye, having absorptivity in the wave length region where the photosensitive resist of the top coat has sensitivity.