Abstract: A resin composition prepared by blending an epoxy compound represented by the following formula (1), an acid anhydride, and a curing accelerator, wherein the epoxy compound is purified in such a way that, in a chromatogram obtained by gas chromatographic analysis, a ratio of a peak area B of peaks derived from a heavier molecular mass portion having longer retention times than the epoxy compound to a peak area A of peak(s) derived from the epoxy compound B/A is 2.0×10?3 or less. [In the formula, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, and R12 each independently represent a hydrogen atom, a halogen atom, an alkyl group which may have a substituent, or an alkoxy group which may have a substituent.].

Abstract: A choke coil for a brake control device, includes: lead wires; a magnetic core; and a case housing the core. The case includes: a cylindrical core part around which the lead wires are wound; and a base part provided on an outer peripheral surface of the core part. End portions of the lead wires extend laterally from the core part, and holding portions configured to hold the end portions of the lead wires are formed on an outer surface of the base part on the opposite side to the core part side.

Abstract: A lubricant additive including a compound represented by a general formula (1): (In the general formula (1), R is a hydrocarbon-containing, group having a carbon number of no less than 1; X1 is a single bond, —CONH— group, —NHCO— group, —NH— group, or a linking group having a carbon number of 0 to 1 and having no less than one heteroatom and not having a hydrogen atom bonded to the heteroatom; X2 is a single bond, or a linking group having a carbon number of 0 to 1 and having no less than one heteroatom and not having a hydrogen atom bonded to the heteroatom; Z is —CN group, —CO2CH3 group, or a group having a carbon number of 0 to 6 and having no less than one heteroatom and a hydrogen atom bonded to the heteroatom.).

Abstract: Provided is a compound which can increase all of the shudder prevention lifetime, transmission characteristic and transmission torque capacity to satisfactory levels when contained in a lubricating oil. Provided are a succinimide compound represented by the following general formula (1), and a friction modifier and a lubricating oil composition containing the succinimide compound. (In the formula (1), R represents a hydrocarbyl group having 8 to 30 carbon atoms; and n represents an integer of 1 to 7.

Abstract: The present invention provides a poly(meth)acrylate-based viscosity index improver comprising a core portion, and three or more arm portions, wherein each of the arm portions consists of a polymer chain comprising a structural unit represented by formula (1) and a structural unit represented by formula (2) and one end of the polymer chain is bonded to the core portion, and wherein a weight-average molecular weight Mw is 100000 or more, and a ratio of the weight-average molecular weight Mw to a number average molecular weight Mn, Mw/Mn, is 1.6 or less. [R1 represents hydrogen or a methyl group, and R2 represents a group represented by formula (3), and R3 represents a C1 to C18 alkyl group that is straight-chain or has a branch having 5 or less carbon atoms: m and n are integers which satisfy m?5, n?4, and m+n?31.

Abstract: The present invention provides a poly(meth)acrylate-based viscosity index improver comprising a core portion and three or more arm portions, wherein each of the arm portions consists of a polymer chain comprising a structural unit represented by the following formula (1), and one end of the polymer chain is bonded to the core portion, and wherein a weight-average molecular weight Mw is 100000 or more, and a ratio of the weight-average molecular weight Mw to a number average molecular weight Mn, Mw/Mn, is 1.6 or less. [R1 represents hydrogen or a methyl group, and R2 represents a C1 to C36 alkyl group.

Abstract: The present invention provides a poly(meth)acrylate-based viscosity index improver comprising a polymer chain comprising a structural unit represented by the following formula (1), wherein a weight-average molecular weight Mw is 100000 or more, and a ratio of the weight-average molecular weight Mw to a number average molecular weight Mn, Mw/Mn, is 1.6 or less. [In the formula (1), R1 represents hydrogen or a methyl group, and R2 represents a C1 to C36 alkyl group.

Abstract: The present invention provides a poly(meth)acrylate-based viscosity index improver comprising a polymer chain comprising a structural unit represented by the following formula (1) and a structural unit represented by the following formula (2), wherein Mw is 100000 or more, and Mw/Mn, is 1.6 or less. [R1 represents hydrogen or a methyl group, and R2 represents a group represented by the following formula (3), and R3 represents a C1 to C18 alkyl group that is straight-chain or has a branch having 5 or less carbon atoms. m and n are integers which satisfy m?5, n?4, and m+n?31.

Abstract: A transparent electro-conductive laminate comprising: a substrate film made of a polyimide; and a thin film made of an electro-conductive material and stacked on the substrate film, wherein the polyimide is a polyimide containing at least one repeating unit represented by the following general formula (1): [in the formula (1), R1, R2, and R3 each independently represent one selected from the group consisting of a hydrogen atom, alkyl groups having 1 to 10 carbon atoms, and a fluorine atom, R4 represents an aryl group having 6 to 40 carbon atoms, and n represents an integer of 0 to 12], having a glass transition temperature of 350° C. to 450° C., and having a linear expansion coefficient of 30 ppm/° C. or less, the linear expansion coefficient being determined by measuring change in length under a nitrogen atmosphere and under a condition of a rate of temperature rise of 5° C./minute in a temperature range from 50° C. to 200° C.

Abstract: A resin composition prepared by blending an epoxy compound represented by the following formula (1), an acid anhydride, and a curing accelerator, wherein the epoxy compound is purified in such a way that, in a chromatogram obtained by gas chromatographic analysis, a ratio of a peak area B of peaks derived from a heavier molecular mass portion having longer retention times than the epoxy compound to a peak area A of peak(s) derived from the epoxy compound B/A is 2.0×10?3 or less. [In the formula, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, and R12 each independently represent a hydrogen atom, a halogen atom, an alkyl group which may have a substituent, or an alkoxy group which may have a substituent.

Abstract: The present invention provides an imide compound represented by the following general formula (1). The imide compound of the present invention, particularly when used as a thickening agent for grease, is excellent in durability at high temperatures. [wherein X represents a tetravalent residue obtained by removing four carboxylic groups from an aromatic tetracarboxylic acid, Y represents a divalent residue obtained by removing two amino groups from an aliphatic diamine or an aromatic diamine, and R represents a residue obtained by removing an amino group from an aliphatic monoamine, an alicyclic monoamine, or an aromatic monoamine.

Abstract: To improve moldability by improving fluidity of resins, and to provide cured substances with favorable heat resistance, relating to the phenol resins and epoxy resins useful as the resins for semiconductor sealing materials. When producing a phenol resin obtained by reacting phenols with dicyclopentadiene in the presence of an acid catalyst, the phenol resin is made to contain in itself specific quantities of the compound A represented by the following general formula (1) and the compound B represented by the following formula (2) by making an aromatic hydrocarbon compound coexist in the phenols at the time of the reaction.

Abstract: A process for producing a phenolic resin of good hue, characterized by reacting a hydroxylated aromatic compound with an unsaturated cyclic hydrocarbon compound in the presence of both active hydrogen and a reducing metal compound with the aid of an acid catalyst, subsequently deactivating the catalyst, and then removing the catalyst, the metal compound, and the starting materials remaining unreacted; and a process for producing an epoxy resin which comprises a step of reacting the phenolic resin with an epihalohydrin. By these processes, a phenolic resin and an epoxy resin are obtained which each is colored little and has an excellent hue. These resins are useful as resins for electrically insulating materials, especially as resins for semiconductor encapsulation materials and for laminated plates.