Abstract: An ink-jet recording material comprising a substrate having thereon an ink absorbing layer containing a mordant which exhibits the following properties: when a thin layer chromatograph is prepared by immersion coating in 1 weight % aqueous solution of the mordant, the thin layer chromatography results in; a) an Rf flow rate value being equal at most 0.4, when a dye represented by following Formula (1) is developed using a developing solvent containing ethanol and water at a volume ratio of 1:1; b) the Rf value being at most 0.3, when C. I. Direct Blue 199 dye is developed using the same developing solvent; and c) the Rf value being at most 0.5, when C. I. Direct Yellow 86 dye is developed using the same developing solvent.

Abstract: An ink-jet recording medium is disclosed. The ink accepting layer of the recording medium contains silica dispersion containing silica particles having a ratio of a free silanol group of 1.0 to 4.5. Silica particles and silica particle dispersion are also disclosed.

Abstract: An ink jet recording medium comprising a support and an ink absorptive layer provided thereon, the ink absorptive layer containing silica fine particles, wherein an absorption coefficient of the ink absorptive layer measured by dynamic scanning liquid absorption meter is from 1.0 to 5.0 ml/[m2·(msec)1/2].

Abstract: An ink-jet recording sheet comprising a support having thereon an ink receptive layer containing silica microparticles and a water-soluble resin, wherein the ink receptive layer is a porous layer having ink receptive voids with a peak value in a distribution curve of radii of the ink receptive voids of 10 to 50 nm; and the silica microparticles are prepared by pulverizing a silica powder, two parameters X and Y of the silica microparticles satisfying the following relationship: 150<Y+17×loge (X)<500, X being a number of silica microparticles having a diameter of not less than 10 &mgr;m contained per gram of the silica microparticles; and Y being an average particle diameter of the silica microparticles measured in nm.

Abstract: The present invention relates to a thiol compound derivative represented by the following formula (1), a curable composition containing the derivative, and a molded product made of the composition. More particularly, the invention relates to a thiol compound derivative which is added to a polymer having reactivity to a thiol derivative substituent to provide a curable composition, a curable composition containing the derivative and a crosslinkable halogen-containing crosslinking polymer, and a crosslinked molded product of the composition.

Abstract: An ink-jet recording medium is disclosed. The ink accepting layer of the recording medium contains silica dispersion containing silica particles having a ratio of a free silanol group of 1.0 to 4.5. Silica particles and silica particle dispersion are also disclosed.

Abstract: A method for producing an ink-jet recording medium, comprising the steps of: (a) shear processing a dispersion of pigment particles at a shear rate of 103 to 105 s−1; (b) mixing the dispersion of pigment particles with a water-soluble polymer to obtain a coating composition; and (c) applying the coating composition onto a surface of a support.

Abstract: A process for manufacturing a recording medium for ink-jet recording is disclosed which comprises the steps of 1) supplying continuously at least inorganic particles and an aqueous medium to a disperser; 2) dispersing the inorganic particles in the disperser to obtain an inorganic particle dispersion solution; 3) ejecting continuously the inorganic particle dispersion solution form the disperser, wherein the supplying, dispersing, and ejecting are carried out in the first dispersion stage; 4) providing a coating solution containing the resulting inorganic particle dispersion solution; and 5) coating solution on a support.

Abstract: An emulsified dispersion comprising at least a photographically useful hydrophobic substance and at least a high boiling solvent, further said emulsified dispersion substantially not comprising an auxiliary organic solvent, wherein a solubility parameter of said photographically useful hydrophobic substance at a temperature of 25.degree. C., and a solubility parameter of said high boiling solvent at a temperature of 25.degree. C. satisfies the relationship represented by the following Formula (1), and said photographically useful hydrophobic substance is dissolved in said high boiling solvent, ##EQU1## AiSP: a solubility parameter of a photographically useful hydrophobic substance, Ai, at a temperature of 25.degree. C.HBSiSP: a solubility parameter of a high boiling solvent, HBSi, at a temperature of 25.degree. C..phi.Ai: a proportion based on the volume fraction of a photographically useful hydrophobic substance, Ai, in an oil phase at a temperature of 25.degree. C.

Abstract: A process is provided for preparing butadiene-styrene copolymers having cis-1,4 configuration of at least 80% of butadiene units, bound styrene contents of 2 to 55% and no homopolystyrene. The copolymers are prepared with a new catalyst system having high polymerization activity. The process involves carrying out polymerization of butadiene monomer and styrene monomer in the presence of the new catalyst system which is comprised of a nickel compound and an alkylaluminoxane compound.

Abstract: A process of making emulsion for photographic material being prevented from coarse oil globules mixed-in which causes visible spots on the final products is disclosed. Before mixing and emulsifying oil phase and water phase in an emulsifying tank, said two phases are pre-mixed air-tightly in an in-line-mixer to minimize the above mentioned trouble.

Abstract: The invention provides a method of removing organic solvent from a solution containing an emulsifier capable of foaming. The pressure in a chamber, in which the solution is disposed, is reduced. The foaming condition of the solution in the chamber is detected. Thereafter, the reduced pressure is regulated in accordance with the foaming condition of the solution.

Abstract: A novel method is proposed for the preparation of a block copolymer of styrene and ethylene having a very narrow molecular weight distribution and controlled molar ratio of the styrene moiety to ethylene moiety in a high efficiency. The method comprises the steps of: (a) living-polymerizing styrene by using an organic lithium compound as a polymerization initiator; (b) admixing the polymerization mixture containing the living polymer of styrene with a tertiary diamine compound, such as N,N,N',N'-tetramethyl ethylene diamine; and (c) introducing ethylene monomer into the polymerization mixture to effect polymerization of ethylene on to the living polymer molecules of polystyrene.

Abstract: In a method and apparatus for testing a number of functions of a temperature measuring device, a temperature measuring portion is subjected to a predetermined temperature, and information outputted by the device is read optically or acoustically. The application of various temperatures and the reading of the outputted information are controlled sequentially in dependence upon the types of functions to be tested, and the read information is compared with predetermined information to determine whether each function passes or fails the test. A thermal equilibrium temperature measurement function of the device is tested by heating the temperature measuring portion to thermal equilibrium. Power is then reintroduced to the device and the initial display of the device is tested to determine if all segments of the display light.

Abstract: A succession of electronic circuit board blanks contoured in a board blank strip support electronic parts such as microcomputers and other components thereon and are joined at spaced intervals by narrow joints such as ribs which are spaced considerably apart from the microcomputers which are highly susceptible to stresses. When the board blanks are severed from each other by cutting off the joints, no substantial stresses will be applied to the microcomputers on the board blanks. The board blanks can easily be separated automatically into electronic circuit boards successively.

Abstract: A process for producing a silicon isocyanate compound which comprises reacting a silicon halide compound in which a fluoride compound is excluded with an isocyanate of the formula [I] M(NCO).sub.m or a cyanate of the formula [I'] M(OCN).sub.m wherein M represents a member selected from the group consisting of alkali metals and alkaline earth metals, and m is 1 or 2, in the presence of one or more reaction accelerators selected from the group consisting of alkylene glycols, polyalkylene glycols and, ether and ester derivatives thereof, thereby to prepare a silicon isocyanate compound containing at least one Si--NCO linkage.

Abstract: A room temperature curable silicone composition of one-pack type comprising a silanol-terminated polyorganosiloxane compound, a silyl isocyanate compound and a Ti--O--P bond-containing organic compound has excellent storage stability, short curing time, and excellent physical properties and is not susceptible to discoloration.

Abstract: When a film-forming material is dried and hardened in the presence of an alkoxy radical-containing zirconium compound-cobalt carboxylate complex, the drying process and hardness of the resulting film are improved.