Abstract: To provide an adhesive excellent in heat resistance and adhesive property. An adhesive comprising a fluorinated polymer having a weight average molecular weight (Mw) of from 6×103 to 3×104 and having iodine atoms at both terminals, and a radical generator. The fluorinated polymer has structural units derived from at least one monomer selected from the group consisting of tetrafluoroethylene, vinylidene fluoride, hexafluoropropylene and a perfluoro(alkyl vinyl ether).

Abstract: To provide an adhesive excellent in heat resistance and adhesive property. An adhesive comprising a fluorinated polymer having a weight average molecular weight (Mw) of from 6×103 to 3×104 and having iodine atoms at both terminals, and a radical generator. The fluorinated polymer has structural units derived from at least one monomer selected from the group consisting of tetrafluoroethylene, vinylidene fluoride, hexafluoropropylene and a perfluoro(alkyl vinyl ether).

Abstract: The claimed invention relates to a method for producing a melt-moldable tetrafluoroethylene copolymer containing repeating units (a) based on tetrafluoroethylene and repeating units (b) based on another fluoromonomer, wherein the amount of the repeating units (a), based on the total mass of the repeating units (a) and the repeating units (b), is from 97.3 to 99.5 mass %, and the volume flow rate of the copolymer is from 0.1 to 1000 mm3/s; the process including radical suspension-polymerization of tetrafluoroethylene and the fluoromonomer in an aqueous medium in the presence of a radical polymerization initiator and at least one chain transfer agent selected from the group consisting of methane, ethane, a hydrochlorocarbon, a hydrofluorocarbon and a hydrochlorofluorocarbon.

Abstract: The present invention provides an ETFE-type copolymer having a high melt tension and excellent blow moldability. An ethylene-tetrafluoroethylene copolymer which comprises ethylene units, tetrafluoroethylene units and units of a monomer (A) having at least two copolymerizable double bonds and which has a ratio (X/W) of its melt tension (XmN) to a load (Wkg) applied for the measurement of the melt tension being at least 0.8.

Abstract: A multilayer tube including at least three layers including a layer (a) formed of (A) polyamide 11 and/or polyamide 12, a layer (b) formed of (B) a polyamide (semi-aromatic polyamide) including a dicarboxylic acid unit containing a terephthalic acid and/or naphthalenedicarboxylic acid unit in a proportion of 50 mol % or more based on all dicarboxylic acid units, and a diamine unit containing an aliphatic diamine unit having a carbon number of 9 to 13 in a proportion of 60 mol % or more based on all diamine units, and a layer (c) formed of (C) a fluorine-containing polymer having introduced into the molecular chain thereof a functional group having reactivity with a polyamide-based resin, is provided as a multilayer tube excellent in an alcohol gasoline permeation-preventing property, interlayer adhesion, low-temperature impact resistance, heat resistance and chemical resistance.

Abstract: To provide a method for producing a melt-processable fluororesin, which is capable of increasing the molecular weight of the fluororesin and preventing coloration of the fluororesin, by using a specific fluorinated emulsifier other than ammonium perfluorooctanoate. A method for producing a melt-processable fluororesin which is characterized in that a fluorinated monomer is emulsion-polymerized in an aqueous medium containing a fluorinated emulsifier of a formula (I) XCF2CF2(O)mCF2CF2OCF2COOA wherein X is a hydrogen atom or a fluorine atom, A is a hydrogen atom, an alkali metal or NH4, and m is an integer of 0 or 1.

Abstract: To provide a process for producing a thermoplastic fluororesin having a high melt tension and being excellent in blow moldability, etc.

Abstract: To provide an ETFE-type copolymer having a high melt tension and excellent blow moldability. An ethylene-tetrafluoroethylene copolymer which comprises ethylene units, tetrafluoroethylene units and units of a monomer (A) having at least two copolymerizable double bonds and which has a ratio (X/W) of its melt tension (XmN) to a load (Wkg) applied for the measurement of the melt tension being at least 0.8.

Abstract: A laminate for a printed wiring board having a laminate structure comprising an electrical insulator layer (A) and an electrical conductor layer (B) bonded directly to each other, wherein the electrical insulator layer (A) is formed of a fluorocopolymer comprising repeating units (a) based on tetrafluoroethylene and/or chlorotrifluoroethylene, repeating units (b) based on a fluoromonomer excluding tetrafluoroethylene and chlorotrifluoroethylene, and repeating units (c) based on a monomer having an acid anhydride residue and a polymerizable unsaturated bond in amounts of (a) being from 50 to 99.89 mol %, (b) being from 0.1 to 49.99 mol % and (c) being from 0.01 to 5 mol %, based on ((a)+(b)+(c)), and the electrical conductor layer (B) has a surface roughness of at most 10 ?m on the side being in contact with the electrical insulator layer (A). The laminate for a printed wiring board is excellent in signal response in a high frequency region.

Abstract: A laminate hose comprising a laminate of a fluorocopolymer and a polyamide, wherein the fluorocopolymer comprises repeating units (a) based on tetrafluoroethylene and/or chlorotrifluoroethylene, repeating units (b) based on a cyclic hydrocarbon monomer having a dicarboxylic anhydride group and having a polymerizable unsaturated group in the ring, and repeating units (c) based on another fluoromonomer (excluding tetrfluoroethylene and chlorofluoroethylene) with contents of the repeating units (a) of from 50 to 99.89 mol %, the repeating units (b) of from 0.01 to 5 mol % and the repeating units (c) of from 0.1 to 49.99 mol % based on the total number of mols of the repeating units (a), (b) and (c), and has a flow coefficient of from 0.1 to 1,000 mm3/sec.

Abstract: To provide a method for producing a tetrafluoroethylene copolymer, wherein the polymerization rate is excellent, the copolymer to be obtained is excellent in mechanical properties such as the tensile strength, it is free from coloration and can be melt-molded. A method for producing a melt-moldable tetrafluoroethylene copolymer comprising repeating units (a) based on tetrafluoroethylene and repeating units (b) based on another fluoromonomer, wherein based on the total mass of the repeating units (a) and the repeating units (b), the amount of the repeating units (a) is from 97.3 to 99.5 mass %, and the volume flow rate is from 0.1 to 1000 mm3/s, characterized by radical suspension-polymerizing tetrafluoroethylene and the fluoromonomer in an aqueous medium in the presence of a radical polymerization initiator and at least one chain transfer agent selected from the group consisting of methane, ethane, a hydrochlorocarbon, a hydrofluorocarbon and a hydrochlorofluorocarbon.

Abstract: To provide a laminate for a flexible printed wiring board excellent in signal response in the high frequency region. A laminate for a flexible printed wiring board having a three-layer laminated structure where a reinforcing layer (A), an electrical insulator layer (B) and an electrical conductor layer (C) are laminated in this order, wherein the electrical insulator layer (B) is made of a fluorocopolymer comprising repeating units (a) based on tetrafluoroethylene and/or chlorotrifluoroethylene, repeating units (b) based on a fluoromonomer excluding tetrafluoroethylene and chlorotrifluoroethylene, and repeating units (c) based on a monomer having an acid anhydride residue and the electrical conductor layer (C) has a surface roughness of at most 10 ?m on the side being in contact with the electrical insulator layer (B). The laminate for a flexible printed wiring board is excellent in signal response in the high frequency region and excellent in flex resistance.

Abstract: A multilayer laminate containing a laminate (I)/(II) that is formed by directly bonding a layer (I) made of a fluororesin (A) having a functional group (a), said fluororesin (A) being an ethylene/tetrafluoroethylene/hexafluoropropylene/CH2?CH—Rf, wherein Rf copolymer is a C2-6 perfluoroalkyl group, and in the copolymer, the molar ratio of repeating units based on ethylene/repeating units based on tetrafluoroethylene/repeating units based on hexafluoropropylene/repeating units based on CH2? CH—Rf ranges from 40/47/10/3 to 46.9/46.9/6/0.2 and a layer (II) made of a thermoplastic resin (B) having a functional group (b) that is capable of forming a chemical bond by reacting with the functional group (a) of the fluororesin, wherein the fluororesin (A) has a melting point ranging from 120 to 230° C.

Abstract: To provide a method for producing a melt-processable fluororesin, which is capable of increasing the molecular weight of the fluororesin and preventing coloration of the fluororesin, by using a specific fluorinated emulsifier other than ammonium perfluorooctanoate. A method for producing a melt-processable fluororesin which is characterized in that a fluorinated monomer is emulsion-polymerized in an aqueous medium containing a fluorinated emulsifier of a formula (1) XCF2CF2(O)mCF2CF2OCF2COOA wherein X is a hydrogen atom or a fluorine atom, A is a hydrogen atom, an alkali metal or NH4, and m is an integer of 0 or 1.

Abstract: A fluorocopolymer and film thereof exhibiting excellent transparency and mechanical strength at ambient and elevated temperatures, wherein the fluorocopolymer includes polymerized units based on ethylene (E), tetrafluoroethylene (TFE), hexafluoropropylene (HFP) and perfluoro(alkyl vinyl ether) (PFAV), wherein the molar ratio of polymerized units based on E/TFE is from 10/90 to 60/40, the content of polymerized units based on HFP is from 0.2 to 0.9 mol % based on the total number of polymerized units, and the content of polymerized units based on PFAV is from 0.1 to 1.0 mol % based on the total number of polymerized units.

Abstract: To provide a laminate for a flexible printed wiring board excellent in signal response in the high frequency region. A laminate for a flexible printed wiring board having a three-layer laminated structure where a reinforcing layer (A), an electrical insulator layer (B) and an electrical conductor layer (C) are laminated in this order, wherein the electrical insulator layer (B) is made of a fluorocopolymer comprising repeating units (a) based on tetrafluoroethylene and/or chlorotrifluoroethylene, repeating units (b) based on a fluoromonomer excluding tetrafluoroethylene and chlorotrifluoroethylene, and repeating units (c) based on a monomer having an acid anhydride residue and the electrical conductor layer (C) has a surface roughness of at most 10 ?m on the side being in contact with the electrical insulator layer (B). The laminate for a flexible printed wiring board is excellent in signal response in the high frequency region and excellent in flex resistance.

Abstract: A multilayer laminate containing a laminate (I)/(II) formed by directly bonding by means of thermal lamination or the like, a layer (I) made of a fluororesin (A) with a functional group (a) and a layer (II) made of a thermoplastic resin (B) with a functional group (b) capable of forming a chemical bond by reacting with the functional group (a) of the fluororesin, wherein the fluororesin (A) has a low melting point of from 120 to 230° C. The laminate may, for example, be a multiplayer laminate containing a layer obtained by directly laminating a layer (I) made of a fluororesin (A) containing an acid anhydride residue (for example, a tetrafluoroethylene/ethylene/hexafluoropropylene/(perfluorobutyl)ethylene)/itaconic anhydride copolymer) and a layer (II) made of an amine-modified thermoplastic resin (B) (for example, a polyurethane modified with a silane coupling agent containing an amino group). The laminate is excellent in interlayer adhesion and productivity.

Abstract: A laminate for a printed wiring board having a laminate structure comprising an electrical insulator layer (A) and an electrical conductor layer (B) bonded directly to each other, wherein the electrical insulator layer (A) is formed of a fluorocopolymer comprising repeating units (a) based on tetrafluoroethylene and/or chlorotrifluoroethylene, repeating units (b) based on a fluoromonomer excluding tetrafluoroethylene and chlorotrifluoroethylene, and repeating units (c) based on a monomer having an acid anhydride residue and a polymerizable unsaturated bond in amounts of (a) being from 50 to 99.89 mol %, (b) being from 0.1 to 49.99 mol % and (c) being from 0.01 to 5 mol %, based on ((a)+(b)+(c)), and the electrical conductor layer (B) has a surface roughness of at most 10 ?m on the side being in contact with the electrical insulator layer (A) The laminate for a printed wiring board is excellent in signal response in a high frequency region.

Abstract: A fluorocopolymer which comprises (A) polymerized units based on tetrafluoroethylene, (B) polymerized units based on ethylene and (C) polymerized units based on itaconic anhydride or citraconic anhydride, wherein the molar ratio of (A)/(B) is from 20/80 to 80/20, and the molar ratio of (C)/((A)+(B)) is from 1/10000 to 5/100, and which has a volume flow rate of from 1 to 1000 mm3/sec. The fluorocopolymer is excellent in the fuel barrier properties and in the adhesive properties to a non-fluorinated polymer.

Abstract: A multilayer tube including at least three layers including a layer (a) formed of (A) polyamide 11 and/or polyamide 12, a layer (b) formed of (B) a polyamide (semi-aromatic polyamide) including a dicarboxylic acid unit containing a terephthalic acid and/or naphthalenedicarboxylic acid unit in a proportion of 50 mol % or more based on all dicarboxylic acid units, and a diamine unit containing an aliphatic diamine unit having a carbon number of 9 to 13 in a proportion of 60 mol % or more based on all diamine units, and a layer (c) formed of (C) a fluorine-containing polymer having introduced into the molecular chain thereof a functional group having reactivity with a polyamide-based resin, is provided as a multilayer tube excellent in an alcohol gasoline permeation-preventing property, interlayer adhesion, low-temperature impact resistance, heat resistance and chemical resistance.