Abstract: A polyester polyol obtained by reacting a dicarboxylic acid component (A) with a diol component (B). The dicarboxylic acid component (A) contains a dicarboxylic acid (a1) represented by the following general formula (I) and a dicarboxylic acid (a2) represented by the following general formula (II). A content of the dicarboxylic acid (a2) is 0.02 to 3.00% by mass in 100% by mass of the total amount of the dicarboxylic acid component (A): R1, R2, R4, and R5 each independently represent a divalent hydrocarbon group having 1 to 3 carbon atoms, and R3 and R6 each independently represent a monovalent hydrocarbon group having 1 to 3 carbon atoms.

Abstract: Provided is a composition for removing a sulfur-containing compound present in liquid or vapor, the sulfur-containing compound being hydrogen sulfide, an —SH group-containing compound or a mixture thereof, the composition containing an ?,?-unsaturated aldehyde represented by the following general formula (1) as an active ingredient; wherein R1 and R2 each independently represent an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms or an aryl group having 6 to 12 carbon atoms, or are connected to each other to represent an alkylene group having 2 to 6 carbon atoms; and R3 represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, or is connected to R1 to represent an alkylene group having 2 to 6 carbon atoms.

Abstract: [Problem] To provide an insulation material that has an excellent volume resistivity while retaining the balance among various capabilities including the mechanical strength, the heat resistance, the oil resistance, the bleed-out resistance, the plasticizer migration resistance, and the like, equivalent to a resin composition containing an ordinary phthalate ester. [Solution] An insulation material containing a resin composition containing: an ester (i) having one or more constitutional unit represented by the following formula (A) (wherein R1 and R2 each independently represent an alkyl group having from 1 to 4 carbon atoms); and a resin (ii).

Abstract: Provided is a composition for removing a sulfur-containing compound present in liquid or vapor, the sulfur-containing compound being hydrogen sulfide, an —SH group-containing compound or a mixture thereof, the composition containing an ?,?-unsaturated aldehyde represented by the following general formula (1) as an active ingredient; wherein R1 and R2 each independently represent an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms or an aryl group having 6 to 12 carbon atoms, or are connected to each other to represent an alkylene group having 2 to 6 carbon atoms; and R3 represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, or is connected to R1 to represent an alkylene group having 2 to 6 carbon atoms.

Abstract: Provided is a composition for removing iron sulfide, containing, as an active ingredient, an ?,?-unsaturated aldehyde represented by the following general formula (1): wherein R1 to R3 each independently represent a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an aryl group having 6 to 12 carbon atoms, provided that R1 may be connected to R2 or R3, to constitute an alkylene group having 2 to 6 carbon atoms; and that R1 and R2 are not a hydrogen atom at the same time.

Abstract: Disclosed is a composition capable of removing safely and efficiently a sulfur-containing compound contained in a hydrocarbon, particularly hydrogen sulfide, an —SH group-containing compound, or a mixture thereof. Provided is a composition for removal of a sulfur-containing compound in a hydrocarbon, the sulfur-containing compound being hydrogen sulfide, an —SH group-containing compound or a mixture thereof: the composition containing a dialdehyde having 6 to 16 carbon atoms as an active ingredient.

Abstract: An object of the present invention is to provide a biological corrosion inhibitor for a metal, which exhibits the effect at a low concentration and is superior in biodegradability. A biological corrosion inhibitor for a metal including 3-methylglutaraldehyde as an effective ingredient is provided.

Abstract: The present invention aims to provide an agent for inhibiting biocorrosion of a metal, which shows high environmental and occupational safety. An agent for inhibiting biocorrosion of a metal, comprising 1,9-nonanedial and/or 2-methyl-1,8-octanedial as an active ingredient.

Abstract: An object of the present invention is to provide a biological corrosion inhibitor for a metal, which exhibits the effect at a low concentration and is superior in biodegradability. A biological corrosion inhibitor for a metal including 3-methylglutaraldehyde as an effective ingredient is provided.

Abstract: [Problem] To provide an insulation material that has an excellent volume resistivity while retaining the balance among various capabilities including the mechanical strength, the heat resistance, the oil resistance, the bleed-out resistance, the plasticizer migration resistance, and the like, equivalent to a resin composition containing an ordinary phthalate ester. [Solution] An insulation material containing a resin composition containing: an ester (i) having one or more constitutional unit represented by the following formula (A) (wherein R1 and R2 each independently represent an alkyl group having from 1 to 4 carbon atoms); and a resin (ii).

Abstract: An object of the present invention is to provide a process for producing an octadiene from 2,7-octadienyl formate in an industrially useful manner in which palladium can maintain its catalytic activity for a long period of time. More specifically, the present invention relates to a process for producing an octadiene which includes the steps of continuously adding 2,7-octadienyl formate into a reaction system in which a mixture of a palladium compound, a tertiary organophosphorus compound and a solvent is present; and subjecting the 2,7-octadienyl formate to reaction while continuously distilling off a reaction product containing the resulting octadiene out of the reaction system.

Abstract: Disclosed is a composition capable of removing safely and efficiently a sulfur-containing compound contained in a hydrocarbon, particularly hydrogen sulfide, an —SH group-containing compound, or a mixture thereof. Provided is a composition for removal of a sulfur-containing compound in a hydrocarbon, the sulfur-containing compound being hydrogen sulfide, an —SH group-containing compound or a mixture thereof: the composition containing a dialdehyde having 6 to 16 carbon atoms as an active ingredient.

Abstract: The present invention aims to provide an agent for inhibiting biocorrosion of a metal, which shows high environmental and occupational safety. An agent for inhibiting biocorrosion of a metal, comprising 1,9-nonanedial and/or 2-methyl-1,8-octanedial as an active ingredient.

Abstract: An object of the present invention is to provide a process for producing an octadiene from 2,7-octadienyl formate in an industrially useful manner in which palladium can maintain its catalytic activity for a long period of time. More specifically, the present invention relates to a process for producing an octadiene which includes the steps of continuously adding 2,7-octadienyl formate into a reaction system in which a mixture of a palladium compound, a tertiary organophosphorus compound and a solvent is present; and subjecting the 2,7-octadienyl formate to reaction while continuously distilling off a reaction product containing the resulting octadiene out of the reaction system.

Abstract: The method of the invention for continuously producing 2,5-dihydrofuran includes subjecting cis-2-butene-1,4-diol to liquid-phase dehydration-cyclization reaction in the presence of alumina, characterized in that the sum of the concentration of carbonyl compounds present in the reaction system and the concentration of acetal compounds present in the reaction system is controlled to fall within a range of 0.1 to 2 mol/L, provided that the concentration of the acetal compounds is calculated in terms of acetal groups, the concentrations being determined on the basis of the total amount of the reaction mixture. According to the method, 2,5-dihydrofuran, which is useful as a raw material or intermediate for producing pharmaceuticals, agrochemicals, raw materials of polymers, etc., can be continuously produced. The method can prevent inactivation of ?-alumina and is advantageous for long-term production on an industrial scale.

Abstract: The invention provides a method for producing a vinyl ether compound, characterized in that the method includes isomerizing an allyl ether compound represented by formula (I) or (II): (wherein R1 represents a C1 to C6 alkyl group; each of R2, R3, and R4 independently represents a hydrogen atom, a C1 to C6 alkyl group, or a C3 to C6 alkenyl group; and n is 1 or 2) in the presence of hydrogen, a monodentate tris(ortho-substituted aryl) phosphite, and a rhodium compound. The vinyl ether compound is useful as a raw material, an intermediate, etc. for producing pharmaceuticals, agrochemicals, polymers, etc.

Abstract: The method of the invention for continuously producing 2,5-dihydrofuran includes subjecting cis-2-butene-1,4-diol to liquid-phase dehydration-cyclization reaction in the presence of alumina, characterized in that the sum of the concentration of carbonyl compounds present in the reaction system and the concentration of acetal compounds present in the reaction system is controlled to fall within a range of 0.1 to 2 mol/L, provided that the concentration of the acetal compounds is calculated in terms of acetal groups, the concentrations being determined on the basis of the total amount of the reaction mixture. According to the method, 2,5-dihydrofuran, which is useful as a raw material or intermediate for producing pharmaceuticals, agrochemicals, raw materials of polymers, etc., can be continuously produced. The method can prevent inactivation of ?-alumina and is advantageous for long-term production on an industrial scale.

Abstract: Phosphonium salts represented by the general formula (I) wherein R1 and R2 each represents a phenyl group which may be substituted by a lower alkyl group, R3 represents a phenylene group which may be substituted by a lower alkyl group, R7 and R8 each represents a hydrogen atom or a hydrocarbon group having 1 to 12 carbon atoms which may be substituted and R9 represents a hydrogen atom or a hydrocarbon group having 1 to 5 carbon atoms which may be substituted; processes for producing the same and uses for the same; phosphines providing the same, and processes for producing said phosphines.

Abstract: Phosphonium salts represented by the general formula (I) 1

Abstract: Phosphonium salts represented by the general formula (I) wherein R1 and R2 each represents a phenyl group which may be substituted by a lower alkyl group, R3 represents a phenylene group which may be substituted by a lower alkyl group, R7 and R8 each represents a hydrogen atom or a hydrocarbon group having 1 to 12 carbon atoms which may be substituted and R9 represents a hydrogen atom or a hydrocarbon group having 1 to 5 carbon atoms which may be substituted; processes for producing the same and uses for the same; phosphines providing the same, and processes for producing said phosphines.