Abstract: An object of the present disclosure is to provide a composite having excellent heat resistance, particularly, pyrolysis resistance and allowing easy introduction of a functional group thereinto. A composite including: a polymer; and one or more cyclic compounds that comprise the polymer, where the polymer has at least one selected from a glass transition temperature and a melting point at 130° C. or higher, the cyclic compound comprises a compound represented by the formula (I): where, in the formula, A independently represents a divalent C4-50 organic group containing one or more selected from —OR and —CO—, R independently represents an organic group optionally containing one or more fluorine atoms, or a hydrogen atom, and n represents an integer of 4 to 20.

Abstract: Provided is a repellent imparting liquid-repellency to substrates (for example, a fiber and paper), the repellent comprising a liquid-repellent compound, the liquid-repellent compound having an amine backbone, and one or more long chain hydrocarbon-containing groups represented by the following formula: —X—Rn wherein, in the formula, each symbol has the same meaning as in the specification.

Abstract: A dielectric that reduces frequency dependency of a dielectric constant in terahertz high-frequency bands (110 to 330 GHz) of the dielectric constant and a method for producing the same, are provided. The dielectric having a slope of a dielectric constant (Dk) with respect to frequencies from 220 GHz to 330 GHz of 0.00001 or more and 0.0005 or less, as measured with a Fabry-Perot resonator J-band.

Abstract: A compound represented by general formula: R1—R2—X, wherein R1 is —CH3, —CH2F, —CHF2, —CH2I, —CHFI, or an anionic group, R2 is an alkylene group consisting of unit represented by —CFH—, or an alkylene group consisting of unit represented by —CFH— and a unit represented by —CH2—, provided that these alkylene groups optionally contain epoxy group, —CH(OH)—, —CHI—, or a divalent cycloalkylene group, X is —OH, —CH(R21)OH (wherein R21 is H, a non-fluorinated alkyl group, or a fluorinated alkyl group), —I, —CFHI, —CH2I, an anionic group, or —COOR22 (wherein R22 is a non-fluorinated alkyl group having 1 to 8 carbon atoms, and the total number of carbon atoms of R1, R2, and X is 2 to 50).

Abstract: Provided is a fluorine-containing ether compound represented by general formula: R1—R2—O—R3—R4 wherein R1 is —CH3, —CH2F, —CHF2, —CH2I, or —CHFI; R2 is a fluorinated alkylene group having 1 to 10 carbon atoms consisting of unit represented by —CHF—, a fluorinated alkylene group having 2 to 10 carbon atoms consisting of unit represented by —CHF— and unit represented by —CH2—, or a fluorine-containing alkylene group having 3 to 10 carbon atoms consisting of unit represented by —CFH—, unit represented by —CH2—, and unit represented by —CHI—; R3 is single bond, a non-fluorinated alkylene group having 1 to 5 carbon atoms, or a fluorinated alkylene group having 1 to 10 carbon atoms; and R4 is —CH3, —CH2F, or —CHF2.

Abstract: A composition for obtaining a fluororesin sheet having excellent performance in terms of a low dielectric constant, a low loss, and low thermal expansion, a fluororesin sheet, and a method for producing the same, are provided. The composition containing a fluororesin and a filler having a ratio of (a dielectric loss tangent of the filler measured at 10 GHz)/(a surface area of the filler (m2/g)) of 0.00001 to 0.00035.

Abstract: Provided is a polymer comprising a repeating unit derived from a monomer (a) represented by general formula: R1—R2—(CH2)p—O—R3 wherein R1 is —CH3, —CH2F, —CHF2, —CH2I, or —CHFI, R2 is an alkylene group having 1 to 49 carbon atoms consisting of unit represented by —CFH—, an alkylene group having 2 to 49 carbon atoms consisting of unit represented by —CFH— and unit represented by —CH2—, or an alkylene group having 3 to 49 carbon atoms consisting of unit represented by —CFH—, unit represented by —CH2—, and unit represented by —CHI—, p is an integer of 0 to 2, and R3 is an organic residue having an ethylenically unsaturated polymerizable group.

Abstract: An object of this disclosure provides a novel method for producing a fluorovinyl amide compound and the like. The object is achieved by a method for producing a compound represented by formula (1): wherein Rf is —F or fluoroalkyl, Ra1 is —H or an organic group, and Ra2 is —H or an organic group, or (i) Ra1 and Ra2, (ii) Ra1 and Rf, or (iii) Rf and Ra2, may be linked to each other, Rb1 is —H or an organic group, and Rb2 is —H or an organic group, or Rb1 and Rb2 may be linked together with their adjacent atoms to form a nitrogen-containing ring optionally having one or more substituents, the method comprising step A of reacting a compound represented by formula (2): wherein Rx is a leaving group, with a compound represented by formula (3) or a salt thereof: in the presence of a transition metal catalyst.

Abstract: An aim of the present disclosure is to provide a method for producing a fluoroalkoxide, said method being more useful than conventional methods, and the like. The aim can be achieved by a method for producing a compound represented by the following formula (1): (wherein R1 is a fluoroalkyl group optionally containing an oxygen atom between carbon atoms, or a fluoroalkoxy group optionally containing an oxygen atom between carbon atoms, and each R2 is identical to or different from each other and is a hydrocarbon group), the method comprising the step of reacting a compound represented by the following formula (2): with a compound represented by the following formula (3): ?F?NR2)4??(3).

Abstract: A polytetrafluoroethylene having a breaking strength of 10.0 N or more and a thermal instability index (TII) of 20 or more. Also disclosed is a stretched body including the polytetrafluoroethylene.

Abstract: A robot system includes an end effector configured to hold a workpiece, an operation device connected to the end effector and configured to operate the end effector, and a control device configured to control an operation of the operation device. The control device controls: a step of assembling the workpiece in a form in which a pressing-target object is sandwiched by arranging the pressing-target object on a first plate jig arranged at a set position and thereafter placing a second plate jig on the first plate jig through operating the end effector; and a step of conveying the workpiece to press position at which the pressing-target object is pressed by holding the pressing-target object, the first plate jig, and the second plate jig altogether as the workpiece with the end effector.

Abstract: An object of the present disclosure is to provide a method for producing a fluorine-containing polymer and a composition containing the fluorine-containing polymer. The present disclosure provides a composition comprising (A) a fluorine-containing polymer comprising as a main component a structural unit containing a fluorine-containing aliphatic ring, and (B) an aprotic solvent, wherein the fluorine-containing aliphatic ring of the fluorine-containing polymer (A) contains one, two, or three etheric oxygen atoms as a ring-constituting atom; when the fluorine-containing aliphatic ring contains a plurality of etheric oxygen atoms, the etheric oxygen atoms are not adjacent to each other; and the fluorine-containing polymer (A) is present in an amount of 20 mass % or more based on the mass of the composition.

Abstract: An object of this disclosure provides a novel method for producing a fluorovinyl amide compound and the like. The object is achieved by a method for producing a compound represented by formula (1): wherein Rf is —F or fluoroalkyl, Ra1 is —H or an organic group, and Ra2 is —H or an organic group, or (i) Ra1 and Ra2, (ii) Ra1 and Rf, or (iii) Rf and Ra2, may be linked to each other, Rb1 is —H or an organic group, and Rb2 is —H or an organic group, or Rb1 and Rb2 may be linked together with their adjacent atoms to form a nitrogen-containing ring optionally having one or more substituents, the method comprising step A of reacting a compound represented by formula (2): wherein Rx is a leaving group, with a compound represented by formula (3) or a salt thereof: in the presence of a transition metal catalyst.

Abstract: Provided is a fluoroelastomer crosslinkable composition comprising a fluoroelastomer (a) and a cross-linking agent (b), wherein the cross-linking agent (b) is at least one selected from the group consisting of: a compound (b1) having 2 or more aromatic rings, 2 or more hydroxy groups directly bonded to carbon atoms constituting the aromatic rings, and 1 to 6 substituents (?) directly bonded to carbon atoms constituting the aromatic rings for which the value of at least one of the Hammett's substituent constants, ?m and ?p, is 0.03 or more (excluding a bromine atom, an amino group, a sulfanyl group, an acid group, and a group having a group containing these groups); and a salt of the compound (b1) with an alkali metal, an alkaline earth metal, or an onium compound.

Abstract: A composition including (i) an asymmetric chain carbonate represented by the formula R1OCOOR2; and (ii) water, where, in the formula, R1 is an organic group, and R2 is an organic group different from R1; where the composition includes the water in an amount of 100 ppm or less; and where the asymmetric chain carbonate is at least one of CF3OCOOCH3, CF3CH2OCOOCH3, CF3CF2OCOOCH3, CF3CF2CF2OCOOCH3, CF3CF(CF3)OCOOCH3, CF3CH(CF3)OCOOCH3, CF3CF(CH3)OCOOCH3, CF3CH(CH3)OCOOCH3, CF3OCOOCH2CH3, CF3CH2OCOOCH2CH3, CF3CF(CF3)OCOOCH2CH3, CF3CH(CF3)OCOOCH2CH3, CF3CF(CH3)OCOOCH2CH3, CF3CH(CH3)OCOOCH2CH3, CH3OCOOCFHCH3, and CH3CH2OCOOC

Abstract: A method for producing a fluoromethyl derivative represented by formula (1), the method including step A of reacting an alkene compound represented by formula (2) with a fluorine source represented by formula MFn, in the presence of a hypervalent-iodine aromatic compound (1a), or in the presence of an aromatic iodine compound (1b) and an oxidant (A) to fluorinate the alkene compound.

Abstract: A method for producing a low-molecular fluorine compound, including a decomposition step for heating a microwave absorber by the irradiation with microwaves in a reaction vessel provided with a carrier gas inlet and a decomposed gas outlet and then bringing the heated microwave absorber into contact with particles of a material containing a fluororesin to decompose the fluororesin into the low-molecular fluorine compound, wherein the carrier gas temperature TI (° C.) at the inlet is set to a temperature lower than the temperature TR (° C.) of the heated microwave absorber. Accordingly, a temperature difference can be provided such that the temperature of a produced gas discharged from the reaction vessel becomes lower than the temperature in the decomposition reaction system, i.e., the temperature of the heated microwave absorber.

Abstract: Disclosed is a method for producing a compound represented by formula (3), including step A of reacting a compound represented by formula (1) with a compound represented by formula (2) in the presence of at least one member selected from the group consisting of a compound represented by formula (4) and a compound represented by formula (5) wherein R1 to R10 are as defined for the symbols in the specification.

Abstract: The disclosure aims to provide a fluororesin composition having excellent tensile properties and excellent handleability while containing a fluororesin having a history of being heated to a temperature equal to or higher than the melting point thereof and a molded article obtainable from the fluororesin composition. The disclosure relates to a non-melt-flowable fluororesin composition containing: a non-melt-flowable fluororesin A having a history of being heated to a temperature equal to or higher than a melting point thereof; a fluororesin B including at least one selected from the group consisting of a melt-flowable fluororesin and a non-melt-flowable fluororesin having no history of being heated to a temperature equal to or higher than a melting point thereof; and a filler.

Abstract: Provided is a fluoropolymer containing a polymerization unit (I) derived from a monomer (I) represented by the general formula (I) and a polymerization unit (II) derived from a monomer (II) represented by the formula (II): CX1X3?CX2R(—CZ1Z2-A0)m??(I) wherein X1 and X3 are each independently F, Cl, H, or CF3; X2 is H, F, an alkyl group, or a fluorine-containing alkyl group; A0 is an anionic group; R is a linking group; Z1 and Z2 are each independently H, F, an alkyl group, or a fluorine-containing alkyl group; and m is an integer of 1 or more; and CHF?CHF??(II)