Abstract: A process for producing 2,4?-dihydroxydiphenylsulfone which comprises separating 4,4?-dihydroxydiphenylsulfone by crystallization from a mixture containing 4,4?-dihydroxydiphenylsulfone, 2,4?-dihydroxydiphenylsulfone, phenolsulfonic acid and phenol which is obtained by dehydration of phenol and sulfuric acid or phenolsulfonic acid to obtain a mixture having a content of 2,4?-dihydroxydiphenylsulfone greater than the content of 4,4?-dihydroxydiphenylsulfone, crystallizing 2,4?-dihydroxydiphenylsulfone by adjusting the composition of the solvent of the obtained mixture so that the ratio of the amounts by weight of phenol to water is 10:90 to 90:10, and separating 2,4?-dihydroxydiphenylsulfone by filtration; and a process as described above in which the filtrate obtained by the filtration is used as the raw material for the hydration.

Abstract: A hydrophilic treatment composition containing a surfactant having a branched chain, a silicate compound expressed by the following general formula (1), at least one moiety selected from silane coupling agents expressed by the following general formulae (2) and (3), an organic solvent, a catalyst and water. (wherein, in formula (1), R1 may be identical or different, and respectively are a hydrogen atom or an alkyl group having 1-3 carbon atoms, and m is an integer from 1-40.

Abstract: A flame-retardant synthetic resin composition characterized by comprising 1-40 parts by weight of at least one type of organic phosphorus compound represented by the following general formula (1): (wherein R1 represents alkyl, aralkyl, etc.) with respect to 100 parts by weight of a synthetic resin.

Abstract: A paper transparentizing agent, containing at least one amide compound selected from the group consisting of: an amide compound (A) that results from condensation of a monocarboxylic acid and at least one amine compound selected from the group consisting of polyalkylenepolyamines and alkanolamines; an amide compound (B) that results from condensation of at least one monocarboxylic acid, at least one polycarboxylic acid and at least one amine compound selected from the group consisting of polyalkylenepolyamines and alkanolamines; an amide compound (C) that results from condensation of a condensate and a monocarboxylic acid, the condensate resulted from condensation of at least one amine compound selected from the group consisting of polyalkylenepolyamines and alkanolamines, and epichlorohydrin or urea; and an amide compound (D) that results from condensation of a condensate, at least one monocarboxylic acid and at least one polycarboxylic acid, the condensate resulted from condensation of at least one amine co

Abstract: The flame retardant treating agent of the invention comprises a phosphorus-based compound represented by the following formula (4), for example. According to the invention, a polyester fiber woven fabric is immersed in a treatment solution containing the flame retardant treating agent and is heat treated at a prescribed temperature in order to fix the flame retardant treating agent to the polyester fiber woven fabric to obtain flame retardant treated fiber. As a result, it is possible to maintain adequate fiber cleaning durability and achieve a sufficient flame retardant property even by post-treatment, without using halogen-based compounds.

Abstract: Flame retardant treating agents according to the invention comprise a phosphorus-based compound represented by the following formula (4): Flame retardant treated fibers can be obtained by immersion of polyester fiber woven fabrics and the like in a treatment solution containing the flame retardant treating agents and accomplishing heat treatment at a prescribed temperature. It is thereby possible to impart adequate flame retardance to polymer materials such as fibers and thermoplastic polymers even when used in small amounts, and provide flame retardant treating agents that contain no halogen compounds.

Abstract: A process for producing 2,4?-dihydroxydiphenylsulfone which comprises separating 4,4?-dihydroxydiphenylsulfone by crystallization from a mixture containing 4,4?-dihydroxydiphenylsulfone, 2,4?-dihydroxydiphenylsulfone, phenolsulfonic acid and phenol which is obtained by dehydration of phenol and sulfuric acid or phenolsulfonic acid to obtain a mixture having a content of 2,4?-dihydroxydiphenylsulfone greater than the content of 4,4?-dihydroxydiphenylsulfone, crystallizing 2,4?-dihydroxydiphenylsulfone by adjusting the composition of the solvent of the obtained mixture so that the ratio of the amounts by weight of phenol to water is 10:90 to 90:10, and separating 2,4?-dihydroxydiphenylsulfone by filtration; and a process as described above in which the filtrate obtained by the filtration is used as the raw material for the hydration.

Abstract: The detergent composition for petroleum refining apparatus in accordance with the present invention is one used as being mixed with a petroleum solvent when the inside of a petroleum refining apparatus is washed with the petroleum solvent in a nonaqueous system, wherein the detergent composition contains a surfactant having a solubility of at least 10 with respect to a diesel fuel at a temperature of 25° C. When this detergent composition for petroleum refining apparatus is used together with the petroleum solvent, soil components are rapidly impregnated with the petroleum solvent. Consequently, sufficient washing effects can be exhibited. As a result, the washing efficiency can be improved remarkably, whereby the washing time within the petroleum refining apparatus can be shortened greatly.

Abstract: A sterilizing disinfectant and an antimicrobial agent comprising a cationic polymer represented by general formula [1] and an antimicrobial material using a cationic polymer represented by general formula [1].

Abstract: The present invention provides a release agent for die casting, which exhibits a superior lubricating property, namely release property not only in a low-temperature die but also in a high-temperature die. A release agent for die casting is an aqueous emulsion comprising 5-50% by weight of a silicone mixture containing dimethyl silicone and an alkyl-modified silicone, 0.5-5% by weight of a surfactant, and water.

Abstract: Flame retardant treating agents according to the invention comprise a phosphorus-based compound represented by the following formula (4): 1

Abstract: This invention provides a release agent for low speed casting, which does not pollute working environment, has a superior running property and lubricating property and further shows a superior cleanability of a die. An aqueous release agent for a low speed injection die casting comprises as main components an inorganic lubricant, spherical resin particles having an average particle size of 0.1-10 &mgr;m, an organic carboxylic acid metal salt and water.

Abstract: A primary agent for a two-agent hair dyeing/bleaching composition which comprises a primary agent containing an alkali agent and a secondary agent containing an oxidizing agent, wherein the primary agent contains:

Abstract: A recording material comprising a substrate and a polyguanidine salt of the general formula (1) contained in said substrate: wherein R1 and R2 may be the same or different, and each represents a group selected from the group consisting of a divalent aliphatic hydrocarbon group, a divalent aromatic hydrocarbon group and a divalent alicyclic hydrocarbon group; HX is an acid selected from the group consisting of a mineral acid and an organic acid; and p is an integer of 1 to 250.

Abstract: A composition includes at least two aromatic carboxylic acid compounds selected from the group consisting of aromatic carboxylic acid compounds of formulas (I), (II) and (III) as specified in the specification. A thermosensitive recording material has a support, and a thermosensitive coloring layer formed thereon which contains a leuco dye and a color developer capable of inducing color formation in the leuco dye upon application of heat thereto, with the color developer comprising the aforementioned composition of the aromatic carboxylic acid compounds.

Abstract: An ink-jet printing dye-fixing agent is provided which comprises a quaternary cationic polymer having the main chain represented by general formula (1): where R1, R2, R3, and R4 are independently an aliphatic alkyl group of 1 or 2 carbons; R is an aliphatic alkylene group of 1-6 carbons or a phenylene group; and n is an integer of from 3 to 300. A recording paper sheet employing the fixing agent is also provided. This fixing agent has excellent ink dye fixability, and makes ink coloring excellent and improves water resistance of the printed matter.

Abstract: The present invention provides a release agent for die casting, which exhibits a superior lubricating property, namely release property not only in a low-temperature die but also in a high-temperature die.

Abstract: This invention provides a release agent for low speed casting, which does not pollute working environment, has a superior running property and lubricating property and further shows a superior cleanability of a die.

Abstract: A repairing method of a petroleum refining plant for efficiently conducting cleaning process of process equipment and pipings, unloading process of agglomerated catalyst, rinsing work of the process equipment and the pipings, thereby reducing plant shutdown time, preventing stress-corrosion cracking by polythionic acid, improving production efficiency, ensuring work safety and reducing production cost, is provided. For the object, the repairing method of the petroleum refining plant of the present invention has a first step of cleaning the process equipment and the pipings and softening agglomerated catalyst inside the process equipment, second step of rinsing the process equipment and the pipings and coating a surface of the softened catalyst by a coating agent, and third step of dumping the coated catalyst from the process equipment and re-rinsing the process equipment and the pipings.

Abstract: A waterproofing agent for ink jet printing paper comprising an aqueous cationic polyurethane resin solution prepared by dispersing or dissolving in water one or more types of cationic polyurethane resins obtained by neutralizing with acid or quaternizing with a quaternizing agent part or all of the tertiary amino groups of a polyurethane molecule obtained by isocyanate polyaddition reaction of a polyol with at least 2 active hydrogen atoms which can react with isocyanate groups and with a weight average molecular weight of 300-5000, a diol, triol, diamine or triamine compound with a tertiary amino group and a weight average molecular weight of less than 300, and an organic isocyanate with at least 2 isocyanate groups.