Abstract: The present invention provides an optical composition from which an optical article having reduced poor appearance such as cloudiness and optical strain during lens base material production can be obtained, and when a photochromic compound is added, a photochromic cured body having excellent photochromism and mechanical strength can also be formed, and a polyrotaxane used therefor. The polyrotaxane has a composite molecular structure formed of an axle molecule and a plurality of cyclic molecules clathrating the axle molecule, satisfying at least one of (X) and (Y). (X): A side chain having a secondary or tertiary hydroxyl group is introduced into at least part of the cyclic molecule of the polyrotaxane. (Y): A side chain having a group represented by -A (A is an organic group, and contains at least one hydroxyl group) is introduced into at least part of the cyclic molecule of the polyrotaxane, and a pKa of the hydroxyl group of the compound represented by H-A is 6 or more and less than 14.

Abstract: To provide a coating material composition capable of forming a cured film free from flooding or color separation and excellent in weather resistance, as well as a solvent-based coating material, an aqueous coating material, a powder coating material and a coated article, using such a composition.

Abstract: The present invention provides an optical composition from which an optical article having reduced poor appearance such as cloudiness and optical strain during lens base material production can be obtained, and when a photochromic compound is added, a photochromic cured body having excellent photochromism and mechanical strength can also be formed, and a polyrotaxane used therefor. The polyrotaxane has a composite molecular structure formed of an axle molecule and a plurality of cyclic molecules clathrating the axle molecule, satisfying at least one of (X) and (Y). (X): A side chain having a secondary or tertiary hydroxyl group is introduced into at least part of the cyclic molecule of the polyrotaxane. (Y): A side chain having a group represented by -A (A is an organic group, and contains at least one hydroxyl group) is introduced into at least part of the cyclic molecule of the polyrotaxane, and a pKa of the hydroxyl group of the compound represented by H-A is 6 or more and less than 14.

Abstract: To provide a novel fluorinated aromatic compound having at least two carbon-carbon unsaturated bonds, a method for its production, a curable material comprising the fluorinated aromatic compound, a cured product thereof, and an optical member. The fluorinated aromatic compound is represented by formula (A), wherein n is an integer of 0 to 6, a is an integer of 0 to 5, b is an integer of 0 to 4, c is an integer of 0 to 4, a+c+n is 2 to 6, a+b is 2 to 9, Z is a single bond, —O—, —S—, —CO—, —C(CH3)2—, —C(CF3)2—, —SO—, or —SO2—, Rf1 is a C1-8 fluoroalkyl group, Y1 and Y2 are each independently a group represented by formula (1) (s is 0 or 1, and R1, R2, R3, and R4 are each independently a hydrogen atom or a fluorine atom), and F in the aromatic ring indicates that hydrogen atoms in the aromatic ring are all substituted by fluorine atoms.

Abstract: To provide a primer composition for optical articles which comprises (A) a polyrotaxane and (B) a resin and/or precursor thereof. This primer composition for optical articles can suppress the production of a crack in a photochromic coat layer, form a laminate structure that the photochromic coat layer is hardly scratched, and provide a primer coat layer which exhibits excellent adhesion and photochromic properties on an optical substrate.

Abstract: To provide a crosslinkable fluorinated elastomer composition which is excellent in crosslinking reactivity and of which a crosslinked product is excellent in heat resistance and chemical resistance. The crosslinkable fluorinated elastomer composition comprises a fluorinated elastomer (e.g. a tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer) and an aromatic compound having at least two crosslinkable unsaturated double bonds (e.g. a compound represented by the formula (A-1)), and the crosslinked product is one obtained by crosslinking the crosslinkable fluorinated elastomer composition.

Abstract: To provide a coating material composition capable of forming a cured film free from flooding or color separation and excellent in weather resistance, as well as a solvent-based coating material, an aqueous coating material, a powder coating material and a coated article, using such a composition.

Abstract: A process for producing a fluorinated olefin/vinyl alcohol copolymer, which comprises emulsion polymerizing a fluorinated olefin and a vinyl ether in the presence of an aqueous medium and an emulsifier and converting the repeating units based on the vinyl ether to the vinyl alcohol.

Abstract: To provide a crosslinkable fluorinated elastomer composition which is excellent in crosslinking reactivity and of which a crosslinked product is excellent in heat resistance and chemical resistance. The crosslinkable fluorinated elastomer composition comprises a fluorinated elastomer (e.g. a tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer) and an aromatic compound having at least two crosslinkable unsaturated double bonds (e.g. a compound represented by the formula (A-1)), and the crosslinked product is one obtained by crosslinking the crosslinkable fluorinated elastomer composition.

Abstract: To provide a novel fluorinated aromatic compound having at least two carbon-carbon unsaturated bonds, a method for its production, a curable material comprising the fluorinated aromatic compound, a cured product thereof, and an optical member. The fluorinated aromatic compound is represented by formula (A), wherein n is an integer of 0 to 6, a is an integer of 0 to 5, b is an integer of 0 to 4, c is an integer of 0 to 4, a+c+n is 2 to 6, a+b is 2 to 9, Z is a single bond, —O—, —S—, —CO—, —C(CH3)2—, —C(CF3)2—, —SO—, or —SO2—, Rf1 is a C1-8 fluoroalkyl group, Y1 and Y2 are each independently a group represented by formula (1) (s is 0 or 1, and R1, R2, R3, and R4 are each independently a hydrogen atom or a fluorine atom), and F in the aromatic ring indicates that hydrogen atoms in the aromatic ring are all substituted by fluorine atoms.

Abstract: In a starter motor, a second hole is opened toward an outside at an upper side in a vertical direction of an outer opening of a first hole, and a filter having air permeability and water repellency is attached to the second hole. Accordingly, by not attaching the filter to the first hole, and by attaching the filter to the second hole, it is possible to suppress water from entering from the second hole without interfering with introduction of outside air, and without impairing a draining function of the first hole. Therefore, it is possible to enhance the waterproof structure of the starter motor without impairing the draining function.

Abstract: To provide a laminate which is thin and light in weight, which has excellent gas barrier properties, flexibility and durability, and which is excellent in the flatness. A glass sheet/fluororesin laminate comprising a glass sheet having a thickness of from 10 to 500 ?m, and a fluororesin coated layer preferably having a thickness of from 0.1 to 1,000 ?m. Particularly, the thickness ratio of the fluororesin coated layer to the glass sheet is preferably from 0.001 to 10 by the fluororesin coated layer/the glass sheet. Further, the transmittance at a wavelength of from 400 to 700 nm is preferably at least 80%. Further, this laminate is suitable as a protective plate. Still further, this laminate is suitably applied to a photoelectric conversion element.

Abstract: To provide a curable fluorinated polymer which is excellent in curability, and a fluorinated polymer cured product which is excellent in heat resistance and chemical resistance and which exhibits excellent properties as an elastomer. A curable fluorinated polymer having constituent units (A) based on fluoromonoenes (a) and constituent units (B) based on a non-cyclopolymerizable fluorodiene (b), in which the content of polymerizable double bonds is from 0.01 to 0.5 mmol/g, and of which the intrinsic viscosity is from 0.1 to 1 dL/g, and a fluorinated polymer cured product obtained by curing the curable fluorinated polymer in the presence of an organic peroxide.

Abstract: A carriage is moved in a direction including a Y axis component in order to move a turning process tool that is attached to a tool spindle along a horizontal line that is perpendicular to a Z axis, and thus, a turning process is carried out on a workpiece which is attached to a workpiece spindle.

Abstract: To provide a process for producing a fluorinated olefin/vinyl alcohol copolymer having a high molecular weight which can be formed into a strong film with high productivity. A process for producing a fluorinated olefin/vinyl alcohol copolymer, which comprises emulsion polymerizing a fluorinated olefin and a vinyl ether in the presence of an aqueous medium and an emulsifier and converting the repeating units based on the vinyl ether to the vinyl alcohol.

Abstract: A carriage is moved in a direction including a Y axis component in order to move a turning process tool that is attached to a tool spindle along a horizontal line that is perpendicular to a Z axis, and thus, a turning process is carried out on a workpiece which is attached to a workpiece spindle.

Abstract: A carriage is moved in a direction including a Y axis component in order to move a turning process tool that is attached to a tool spindle along a horizontal line that is perpendicular to a Z axis, and thus, a turning process is carried out on a workpiece which is attached to a workpiece spindle.

Abstract: A hydrophilizing agent composition comprising a copolymer having an alternating copolymerization ratio of repeating units represented by the following formula (1) and repeating units represented by the following formula (2) of at least 95%, and a solvent: in the formula (1), each of X and Y which are independent of each other, is H, F, CF3 or Cl; in the formula (2), Z is OR1, NHR2, COOR3 or SO3R4, R is a single bond, a bivalent linking group which may contain an ethereal oxygen atom, or a bivalent linking group which may contain a cyclic structure, and each of R1 to R4 which are independent of one another, is H or a monovalent organic group; provided that in the repeating units represented by the formula (2) contained in the copolymer, the proportion of the repeating units wherein each of R1 to R4 is H is at least 50 mol %.

Abstract: A fluorosulfonyl group-containing monomer having a high polymerization reactivity and plural fluorosulfonyl groups, a fluorosulfonyl group-containing polymer and a sulfonic acid group-containing polymer, obtained by using the monomer.

Abstract: A fluorosulfonyl group-containing monomer having a high polymerization reactivity and plural fluorosulfonyl groups, a fluorosulfonyl group-containing polymer and a sulfonic acid group-containing polymer, obtained by using the monomer.