Abstract: The present invention provides a conductive adhesive agent capable of being diluted with a solvent to give good coating workability and allowing formation of a conductive joint excellent in both thermal conductivity and electrical conductivity by inhibiting a gas generated when a binder resin is heat-cured after attachment of a part. The conductive adhesive agent according to the present invention is a conductive adhesive agent wherein, based on 100 parts by weight of silver powder having an average particle diameter of micrometers, which is used for a conductive medium, e.g.

Abstract: A method of preparing substrates, including the steps of depositing metal particulates into a pillar form at a prescribed position of a substrate (1) by the use of a fine inkjet method, and then sintering the resultant to form a metal pillar (2).

Abstract: This invention provides a low-temperature sintering conductive paste for high density circuit printing which can form a fine circuit having good adhesive force, a smooth surface and low resistance when applied on a substrate and then baked; the conductive paste of the invention uses, as conductive media, in combination with metal fillers having an average particle diameter of 0.

Abstract: To provide a method for producing a sensing film for gas sensors by sintering particles comprising a metal or a metal oxide on a substrate, where the sensing film for gas sensors having excellent sensor properties such as sensitivity and responsibility can be easily and simply formed. A nano-meter order particle (100), a dispersant (110) for preventing aggregation of the particles (100), and a scavenger (120) for trapping the dispersant (110) at the sintering are mixed in a solvent (130) to prepare a paste body (140), and this paste body (140) is coated on a base material and fired, thereby forming a sensing film.

Abstract: The purpose of the present invention is provide a method of forming a flux layer on an aluminum plate member, wherein a heating step for drying after a spray-coating of a flux composition can be omitted. The invention relates to a flux layer 2 composed of solid constituents of 5-25 g/m2 formed on a surface of an aluminum plate member 1, by spray-coating a flux composition from a nozzle 20 to the plate member 1 with a thickness of 0.2-1.6 mm, which was press-molded and heated for degreasing in a heat-degreasing oven 10, while a temperature of the plate member 1 is kept from 120 to 180° C. under the remaining heat after completing a heating step for degreasing, and naturally drying for volatilizing volatile constituents of the flux composition utilizing the remaining heat.

Abstract: The present invention provides a conductive adhesive agent capable of being diluted with a solvent to give good coating workability and allowing formation of a conductive joint excellent in both thermal conductivity and electrical conductivity by inhibiting a gas generated when a binder resin is heat-cured after attachment of a part. The conductive adhesive agent according to the present invention is a conductive adhesive agent wherein, based on 100 parts by weight of silver powder having an average particle diameter of micrometers, which is used for a conductive medium, e.g.

Abstract: According to present invention, there is provided a lead-free solder precipitating composition comprising a tin powder, and a complex of silver ions and/or copper ions and aryl phosphines, alkyl phosphine, phosphines or azoles. The solder precipitating composition can form proper lead-free solder on lands of a circuit board, without forming silver and/or copper film on the circuit board.

Abstract: A resin varnish for printing ink is produced by condensing phenol and formaldehyde in an ink solvent to obtain an ink solvent solution of resole initial condensate, after which the resole initial condensate and a rosin ester containing 30-60 wt % non-aromatic conjugate resin acid and 20-60 wt % aromatic resin acid are reacted at 100-250° C. in a system containing ink solvent or in a system containing ink solvent and drying oil. A high-viscosity, high-molecular-weight ink resin is produced efficiently by reacting, with resole initial condensate in ink solvent, a rosin ester containing specified contents by percentage of conjugate acid and aromatic resin acid. The resin varnish obtained has very few decomposition components and nonuniformly gelled components, so it also is suitable for screen printing ink and letterpress printing ink, in addition to offset printing ink.

Abstract: The present invention provides a rosin modified phenolic resin obtained by reacting a rosin, a phenol-formaldehyde initial condensate and a polyhydric alcohol, wherein the phenol-formaldehyde initial condensate is obtained by reacting phenols with formaldehyde in an ester of an animal and vegetable oil fatty acid and a monoalcohol and the proportion of the ester is from 5 to 200% by weight based on the total amount of the phenols and formaldehyde charged, a gel varnish and a printing ink, which contain the same, and a method for producing a rosin modified phenolic resin.

Abstract: The present invention provides a solder deposition method that includes the step of forming a dam around an electrode on a substrate, the step of applying a solder precipitating composition to the substrate, and the step of depositing solder on the surface of the electrode while heating the solder precipitating composition applied. This solder deposition method is suitable for forming large bumps at fine pitches. In particular, it is capable of depositing solder in a desired height precisely and easily, and yet preventing occurrence of voids.

Abstract: The present invention provides a rosin modified phenolic resin having a weight average molecular weight of 3,000 to 400,000, which is obtained by reacting a monoester with a polyhydric alcohol and a phenol formaldehyde initial condensate, said monoester being prepared by partially esterifying a rosin and an animal and vegetable oil fatty acid with a monoalcohol, and a method for producing the same. Also the present invention provides a gel varnish comprising the resin, an animal and vegetable oil component, and a gelling agent, and a printing ink comprising the gel varnish. Printing is conducted using the printing ink.

Abstract: A resin varnish for printing ink is produced by condensing phenol and formaldehyde in an ink solvent to obtain an ink solvent solution of resole initial condensate, after which the resole initial condensate and a rosin ester containing 30-60 wt % non-aromatic conjugate resin acid and 20-60 wt % aromatic resin acid are reacted at 100-250° C. in a system containing ink solvent or in a system containing ink solvent and drying oil. A high-viscosity, high-molecular-weight ink resin is produced efficiently by reacting, with resole initial condensate in ink solvent, a rosin ester containing specified contents by percentage of conjugate acid and aromatic resin acid. The resin varnish obtained has very few decomposition components and nonuniformly gelled components, so it also is suitable for screen printing ink and letterpress printing ink, in addition to offset printing ink.

Abstract: According to present invention, there is provided a lead-free solder precipitating composition comprising a tin powder, and a complex of silver ions and/or copper ions and aryl phosphines, alkyl phosphine, phosphines or azoles. The solder precipitating composition can form proper lead-free solder on lands of a circuit board, without forming silver and/or copper film on the circuit board.

Abstract: The present invention is a water-based binder used when manufacturing aluminum brazed products such as engine radiators, condensers for car air conditioners, and the like. The water-based binder is obtained by saponifying an ester methacrylate polymer that has an acid value and a glass transition temperature within specified ranges. In the presence of an alcohol that is water soluble and volatile and has a flash point higher than a specified temperature, the brazing composition, in which this binder and flux and the like are mixed, does not have the risk of catching on fire or exploding and also has excellent wettability and can be uniformly coated onto an aluminum material.

Abstract: A toner binder comprising a crosslinked polyester resin obtained by using 0.1 to 3 mol % of trimellitic acid and 0.1 to 5 mol % of an epi-bis type epoxy in combination as crosslinking components, said binder having a number average molecular weight (Mn) in the chromatogram determined by a gel permeation chromatography on the non-gel portion of the polyester resin, of 2,000 to 4,000, a ratio (Mw/Mn) of the weight average molecular weight to the number average molecular weight of 10 to 25 and a (percent gel) of the residue unsoluble in tetrahydrofuran solvent of 1 wt % or less. A toner composition for flash fixing comprising the above-described binder as an essential constituent component. The toner and the toner binder exhibit good fixability and void resistance upon flash fixing and produce little fixing odor.

Abstract: A non-washing soldering flux which is capable of minimizing corrosion and insulation defects due to precipitation of metal salts and cracking of the base resin is disclosed. The flux includes an activator including a dibasic acid with a molecular weight of 250 or less, and a monobasic acid with a molecular weight of from 150 to 300 and/or a dibasic acid with a molecular weight of from 300 to 600. The dibasic acid of molecular weight 250 or less in the flux exhibits sufficient activity, thus ensuring satisfactory solderability. The monobasic acid of molecular weight from 150 to 300 and the dibasic acid of molecular weight from 300 to 600 which are combined therewith promote the activity while also uniformly dispersing the metal salt of the low molecular weight dibasic acid in the flux residue, allowing it to be enveloped by the hydrophobic base resin. For greater cracking resistance, the flux includes at least an acrylic resin of molecular weight 10,000 or less and an activator.

Abstract: The present invention provides a stabilizer comprising a substituted cyclohexene compound of a hindered piperidine type wherein the 1- and 2-positions on a cyclohexene ring are doubly bonded, a carbon atom situated at the 4-position and/or the 5-position of the cyclohexene ring contains a substituent having a C.dbd.O group at its alpha-position, at least one carbon atom of the cyclohexene ring located adjacent to said carbon atom having the C.dbd.O group has a hydrogen atom as a substituent, and at least one group containing a 2,2,6,6-tetramethyl-4-piperidyl group attached to the 3-, 4-, 5- or 6-position of the cyclohexene ring; and/or other substituted cyclohexene compound of a hindered piperidine and/or a compound of a hindered piperidine. The stabilizers of the present invention can exhibit improved properties in light stability and in bleed out resistance even without a phenol type antioxidant.

Abstract: An oil-soluble polyester having a weight average molecular weight of 10,000 to 1 000,000, which is a polycondensate prepared by polycondensing the following ingredients (A), (B) and (C):(A) a divalent higher carboxylic acid ingredient,(B) a divalent alcohol ingredient comprising a glycol represented by the following formula:HO--CH.sub.2 --CR.sup.1 R.sup.2 --CH.sub.2 --OHwherein R.sup.1 and R.sup.2 represent a alkyl group, and the sum of carbon numbers in R.sup.1 and R.sup.2 is at least three, and(C) 0.1 to 15% by mole, based on the total of ingredients (A) and (B), of at least one multi-valent ingredient selected from a carboxylic acid with a valency of at least three and an alcohol with a valency of at least three. This oil-soluble polyester is useful as an additive for a lubricating oil.

Abstract: An oil-soluble polyester having a weight average molecular weight of 10,000 to 1,000,000, which is a polycondensate prepared by polycondensing the following ingredients (A) and (B): (A) a dicarboxylic acid ingredient, and (B) a diol ingredient comprising (i) a hindered glycol represented by the following formula: HO--CH.sub.2 --CR.sup.1 R.sup.2 --CH.sub.2 --OH wherein R.sup.1 and R.sup.2 independently represent a linear or branched alkyl group, and (ii) an alkylene glycol having at least 4 carbon atoms in the main chain. This oil-soluble polyester is useful as an additive for a lubricating oil.

Abstract: The invention provides a solder-precipitating composition containing Sn-Pb alloy powder and an organic acid salt of Pb as essential components, and capable of precipitating solder as a result of substitution between Sn contained in the Sn-Pb alloy powder and Pb contained in the organic acid salt of Pb. Further, the invention provides a mounting method including the steps of supplying a conductor on a board with a solder-precipitating composition which contains Sn-Pb alloy powder and an organic acid salt of Pb as essential components, heating the solder-precipitating composition supplied on the conductor, to precipitate solder on the conductor and pre-coat the conductor with solder, as a result of substitution reaction between Sn in the Sn-Pb alloy powder and Pb ions in the organic acid salt of Pb, mounting a device on the solder pre-coated conductor, and melting the solder layer to securely mount the device on the conductor.