Abstract: A process for bonding a polyolefin, polyfluoroolefin, polyethylene terephthalate, polyacetal, nylon or plasticizer-rich soft polyvinyl chloride substrate to a like substrate or for bonding a polyolefin, polyfluoroolefin, polyethylene terephthalate, polyacetal, nylon or plasticizer-rich soft polyvinyl chloride substrates to another substrate which comprises applying to the surface of at least one of the substrates to be bonded together an adhesion promoter composition comprising 0.001-10 wt. % of at least one organometallic compound containing a metal selected from the group consisting of typical metals, applying a cyanoacrylate-based adhesive comprising an alpha-cyanoacrylate and bringing together the thus-treated surface of the substrates to be bonded.

Abstract: Provided is a process for producing hydroxylapatite suitable for chromatographic separation of biopolymers. The process comprises allowing hexagonal prismatic or acicular monetite to react with potassium hydroxide and/or lithium hydroxide under heating.

Abstract: An epoxy resin composition for use in sealing semiconductors, having enhanced moisture resistance reliability is disclosed, which comprises an epoxy resin and an oxyacid bismuth oxyhydroxide represented by the following formula (1):Bi.sub.x O.sub.y (OH).sub.p (Y.sup.-a).sub.q (NO.sub.3).sub.r.nH.sub.2 O (1)wherein Y.sup.-a represents a residue of an oxyacid other than nitrate; a represents the ionic valence, absolute value, of the residue of the oxyacid; and x, y, p, q, r and n each represents a value satisfying the following:1.ltoreq.x 1.ltoreq.y O.ltoreq.n0.08 x.ltoreq.p.ltoreq.0.92 x0.02 x.ltoreq.aq.ltoreq.0.92 x0.ltoreq.r.ltoreq.0.

Abstract: The present invention provides a fluorine-containing copolymer which comprises the following monomers as essential components:(a) a fluoroolefin,(b) a hydroxyalkyl crotonate, and(c) a vinyl monomer other than the above monomers (a) and (b). The present invention further provides a coating composition comprising the above fluorine-containing copolymer and a crosslinking agent having a functional group which reacts with hydroxyl group.

Abstract: A resin composition for a composite-type vibration-damping material which comprises a saturated copolyester having a weight average molecular weight of at least 10,000 and a softening point of 50.degree. to 150.degree. C. and a polyfunctional isocyanate compound as a cross-linking agent and which, when cross-linked, has a degree of gelation (degree of cross-linking) of at least 10% and a composite-type vibration-damping material produced by use of the resin composition, have excellent adhesive strength and formability.When the resin composition is admixed with a conductive substance, a vibration-damping material produced by use of the admixture has excellent spot-weldability in addition to the above-mentioned excellent properties.

Abstract: A curable composition, in which powder of an organic or inorganic compound is added to and dispersed in a 2-cyanoacrylate and an acidic substance and a basic substance are contained as the stabilizer.In the curable composition of the invention, powder of organic or inorganic compound can be stably dispersed into the composition by the combined use of the acidic substance and the basic substance, thereby providing desired properties with ease while giving excellent storage stability and maintaining the instantaneous curing property of the composition. The curable composition can generally be used as adhesives, coating agents, paints, potting agents, etc.

Abstract: Novel triorganostannyl derivatives of deoxynucleosides or deoxynucleotides of the general formula: ##STR1## wherein R.sup.1 is an alkyl or aryl group, R.sup.2 is a protecting group, R.sup.3 is a protecting group, B is a base residue which may have a protecting group, and n is zero or a positive integer and their amine salts are provided. They are prepared by reacting a deoxynucleoside or deoxynucleotide with either a triorganotin amide or a triorgano(alkoxy)stannane and may be useful as intermediates for the preparation of oligodeoxynecleotides.

Abstract: A method suited for producing a conductor circuit board having a high-density, fine circuit pattern. Conductor circuits and dummy circuits are formed on the surface of a planar, electrically conductive substrate, and after removing a resist mask, unnecessary dummy circuits are removed. A thin metal film is formed over the surface of the conductive substrate and the surfaces of the conductor circuits and remaining dummy circuits. An insulating substrate is superposed on the surface of the conductive substrate on which the thin metal film is formed, and the two substrates are pressure-bonded together with heat applied thereto. Subsequently, only the conductive substrate is removed, and exposed portions of the thin metal film are removed by etching.

Abstract: A process for producing spiro-orthocarbonate having glycol unit (2) is described, which comprises reacting a spiro-orthocarbonate having glycol unit (1) which is different from glycol unit (2), with a glycol having glycol unit (2) to release a glycol having glycol unit (1).

Abstract: A cyanoacrylate composition suitable as cyanoacrylate adhesives for bonding porous materials, shaping material and fingerprint detectors comprises a 2-cyanoacrylate as a main component and at least one of crown ethers, polyalkylene oxides and derivatives of the polyalkylene oxides as a curing accelerator and at least one of hydrophobic silicas.

Abstract: A coating composition comprising (a) an imine obtained by reaction of an organic silicon compound having an aminoalkyl group and at least one alkoxy group with an organic carbonyl compound, (b) a compound having at least one oxirane ring, and optionally (c) a compound having at least one acryloyl or methacryloyl group.

Abstract: A primer comprising at least one member selected from organometallic compounds, natural resins and synthetic resins and at least one fluorine-containing compound of a specific type, which is particularly useful in bonding non-polar or highly crystalline substrates together or bonding another material to the resin substrate.

Abstract: A primer comprising an organometallic compound and an organic polymer, which is useful in bonding non-polar or highly crystalline resin substrates together or bonding said resin substrates and another material, such as a solid material, a coating material, paint or printing ink by using a 2-cyanoacrylate.

Abstract: Novel phosphorsulfide derivatives of deoxynucleosides or deoxynucleotides are provided, which have the general formula: ##STR1## wherein R.sup.1 is a hydroxy-protecting group; R.sup.2 is a phosphate-protecting group; R.sup.3 is an aryl group; B.sub.1 and B.sub.2 may be the same or different and each are a base residue which may have a protecting group; and n is zero or a positive integer, provided that if n is 2 or larger, the respective R.sup.2 may be the same or different. They are prepared by reacting a deoxynucleoside or deoxynucleotide with a 1,2,4-triazolylphosphine compound and are useful as intermediates for the preparation of oligodeoxy-nucleotides.

Abstract: A method for preventing aluminum corrosion in electronic parts which comprises adding lead hydroxy apatite and/or cadmium hydroxy apatite to constituents of the electronic parts through which halogen ions pass, so that said ions may be captured by said apatites in said constituents.

Abstract: A magnetic recording medium having a modified surface, consisting essentially of (a) a substrate, (b) a ferromagnetic metal thin film formed on one side of the substrate by a vacuum deposition method, an ion plating method, a sputtering method or a plating method and (c) a lubricating coating layer formed on the thin film or on the back of the substrate or on both of them. The recording medium has an improved running stability, durability and corrosion resistance.

Abstract: A process for producing acrylic acid or methacrylic acid by reacting acetic acid or propionic acid with formaldehyde in a gas phase is described, characterized by carrying out the reaction in the presence of a solid catalyst containing at least one of boron oxide or phosphorus oxide and having an acid site of an acid strength, pKa.ltoreq.-3.0. The solid catalyst is of high activity and is satisfactory in both selectivity and conversion and, furthermore, its high selectivity can be maintained for long periods of time. Thus the desired product, acrylic acid or methacrylic acid, can be produced in high yield.

Abstract: This invention provides an insulating protective material effective for protection of electronic and electric devices such as electronics elements. This insulating protective material contains at least one hydrous oxide of a metal which has ion exchange properties together with a fusion bonding component such as low-melting glass, epoxy resin, phenolic resin, silicone resin, etc. and a filler such as fused silica, .beta.-eucryptite, glass fiber, glass beads, etc.Said specific hydrous oxide can be used together with a sulfur-containing organic high molecular weight compound.The hydrous oxides used in protective materials as a sealing material for electronic and electric devices can capture an ionic impurity eluted from the components of the protective material and fix it therein thereby to provide stable electronic materials excellent in performance.

Abstract: There is provided a magnetic recording material produced by coating on a support a magnetic coating composition which contains as main components a magnetic powder and a binder, the binder comprising an urethane acrylate synthesized using a polyester polyol having a particular structure, and by irradiating the resulting magnetic coat with electron beams to harden it. The polyester polyol contains polyhydric alcohol component, 50 mole % or more of which is a dihydric alcohol selected from the class (A) described below, and/or polybasic acid component, 50 mole % or more of which is a dibasic acid selected from the class (B) described below. The urethane acrylate is synthesized under such a condition that it may have two or more of (meth)acryloyl groups per molecule. Thus, improvements in electromagnetic properties and in durability are attained.

Abstract: In electrolytic cell for use in electrolysis of aqueous alkali metal chloride solutions, which comprises one or more vertical expandable anodes, one or more vertical cathodes and one or more cation-exchange membranes each located between a pair of the opposite anode and cathode plates; an improvement is now provided, which is lying in the newly devised cathode structure comprising a vertical cathode, a flexible and foraminate metal mesh of low hydrogen-overvoltage removably mounted on one side of said cathode, a hydraulically permeable and hydrogen gas bubbles-impenetrable microporous film removably mounted on said metal mesh, and a cation-exchange membrane removably mounted on said microporous film, in such way that the expandable anode as located adjacent to said cation-exchange membrane is able to exert a resilient force to push the cation-exchange membrane against the microporous film, the metal mesh and the cathode plate; and to bring the latter elements into close contact with each other.