WO2011129405A1 - 含フッ素共重合体組成物の製造方法及びフッ素樹脂成形体 - Google Patents
含フッ素共重合体組成物の製造方法及びフッ素樹脂成形体 Download PDFInfo
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- WO2011129405A1 WO2011129405A1 PCT/JP2011/059297 JP2011059297W WO2011129405A1 WO 2011129405 A1 WO2011129405 A1 WO 2011129405A1 JP 2011059297 W JP2011059297 W JP 2011059297W WO 2011129405 A1 WO2011129405 A1 WO 2011129405A1
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/005—Processes for mixing polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- C08F214/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen
- C08F214/18—Monomers containing fluorine
- C08F214/26—Tetrafluoroethene
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- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/02—Halogenated hydrocarbons
- C08K5/03—Halogenated hydrocarbons aromatic, e.g. C6H5-CH2-Cl
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing atoms other than carbon or hydrogen
- C08L23/0892—Copolymers of ethene with unsaturated hydrocarbons containing atoms other than carbon or hydrogen with monomers containing atoms other than carbon, hydrogen or oxygen
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08L27/18—Homopolymers or copolymers or tetrafluoroethene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/922—Viscosity; Melt flow index [MFI]; Molecular weight
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/92209—Temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92695—Viscosity; Melt flow index [MFI]; Molecular weight
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F214/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen
- C08F214/18—Monomers containing fluorine
- C08F214/26—Tetrafluoroethene
- C08F214/265—Tetrafluoroethene with non-fluorinated comonomers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08J2327/18—Homopolymers or copolymers of tetrafluoroethylene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
Definitions
- the present invention relates to a method for producing a fluorinated copolymer composition having good mechanical properties and moldability.
- ETFE ethylene / tetrafluoroethylene copolymer
- ETFE is required when high moldability is required, such as when injection molding or extrusion molding is performed at a higher speed, or when processing into a molded article having a very fine shape. It is necessary to further increase the melt fluidity of the resin.
- various fillers, pigments, and additives can be blended and filled as necessary to improve the strength, dimensional stability, imparting electrical conductivity, electromagnetic wave shielding properties, surface properties, coloring, etc. of molded products.
- a filler or the like is highly blended / filled in conventional ETFE, there is a problem that the melt viscosity becomes high and the moldability deteriorates.
- ETFE is impregnated into a fibrous material or inorganic porous material made of nonwoven fabric, glass fiber, carbon fiber, aramid fiber, ceramics, or a composite material such as a tent film or a porous printed board, the inside of the fiber or
- a fibrous material or inorganic porous material made of nonwoven fabric, glass fiber, carbon fiber, aramid fiber, ceramics, or a composite material such as a tent film or a porous printed board
- the inside of the fiber or In order to easily and surely impregnate the pores, it is necessary to have high melt fluidity.
- Conventionally, regarding ETFE if the molecular weight is lowered in order to increase the melt fluidity, there has been a problem that the heat resistance and mechanical properties of the obtained molded article are lowered. In particular, the decrease in the tensile elongation of the ETFE molded product due to the lowering of the molecular weight is a major obstacle to expanding the applications of the molded product.
- An object of the present invention is to provide a fluorine-containing copolymer having excellent mechanical properties and good moldability of a molded article obtained from a fluorine-containing copolymer composition, which is required to be developed on the basis of the background as described above. It is to provide a method for producing a composition.
- the present invention provides a method for producing a fluorinated copolymer composition having the following constitution.
- a high molecular weight fluorine-containing copolymer (A) having a melting viscosity at a melting point of + 15 ° C. of 1500 to 35000 Pa ⁇ s and having a repeating unit based on tetrafluoroethylene and a repeating unit based on ethylene;
- the melt viscosity at 50 ° C. is 50 to 3000 Pa ⁇ s, and the melt viscosity at a temperature of the melting point of the fluorine-containing copolymer (A) + 15 ° C. is the same as that of the fluorine-containing copolymer (A).
- Containing mixture (D) is heated to a temperature higher than the temperature at which the fluorinated copolymer (A) and the fluorinated copolymer (B) are dissolved in the solvent (C), and then the solvent (C) is removed.
- a process for producing a fluorine-containing copolymer composition characterized by the above.
- the content of the solvent (C) in the mixture (D) is not less than an amount capable of dissolving the entire amount of the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) in the mixture (D).
- the fluorine-containing copolymer (A) has a molar ratio of (repeat unit based on tetrafluoroethylene) / (repeat unit based on ethylene) of 80/20 to 30/70, and fluorine-containing copolymer (A).
- the fluorine-containing copolymer (B) has a molar ratio of (repeating unit based on tetrafluoroethylene) / (repeating unit based on ethylene) of 80/20 to 30/70, and fluorine-containing copolymer (B). [1] to [1] to [1] to [1], wherein the total amount of the repeating unit based on tetrafluoroethylene and the repeating unit based on ethylene is more than 80 mol% with respect to all the repeating units of the copolymer (B). [3] The method for producing a fluorine-containing copolymer composition according to any one of [3].
- the solvent (C) is at least one selected from the group consisting of fluorine-containing aromatic compounds, aliphatic compounds having one or more carbonyl groups, and hydrofluoroalkyl ethers.
- the manufacturing method of the fluorine-containing copolymer composition in any one of.
- the mass ratio of the fluorine-containing copolymer (A) / the fluorine-containing copolymer (B) in the fluorine-containing copolymer composition is 1/1 to 1/15.
- the heating temperature of the mixture (D) is any one of [1] to [6], wherein the temperature is lower than the melting point of the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B).
- a method for producing a fluorine-containing copolymer composition is any one of [1] to [6], wherein the temperature is lower than the melting point of the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B).
- ethylene / tetrafluoroethylene copolymers having extremely different viscosities which could not be uniformly mixed by conventional melt-kneading, are mixed together to achieve good moldability and mechanical properties.
- An ethylene / tetrafluoroethylene copolymer composition having high characteristics is obtained.
- the mixture (D) refers to a mixture containing a fluorine-containing copolymer (A), a fluorine-containing copolymer (B), and a solvent (C).
- the mixture (D) may be in a uniform state or a non-uniform state. Further, it may be in a solid state, in a gel state, or in a solution state.
- the composition refers to a mixture of the fluorinated copolymer (A) and the fluorinated copolymer (B). (Fluorine-containing copolymer (A))
- the fluorine-containing copolymer (A) in the present invention has a melt viscosity at a melting point of + 15 ° C.
- TFE tetrafluoroethylene
- E ethylene
- the fluorine-containing copolymer (A) includes a repeating unit based on one or more kinds of other monomers in addition to the repeating unit based on TFE and the repeating unit based on E, as long as the essential characteristics thereof are not impaired. May be included.
- ⁇ -olefins having 3 or more carbon atoms such as propylene and butene; CH 2 ⁇ CX (CF 2 ) n Y (where X and Y are independently a hydrogen atom or a fluorine atom, and n is 2
- VDF vinylidene fluoride
- VF vinyl fluoride
- HFIB hexafluoroisobutylene
- Hexafluoropropylene HFP
- chlorotrifluoroethylene CFE
- perfluoro (methyl vinyl ether) PMVE
- perfluoro (ethyl vinyl ether) PEVE
- perfluoro (propyl vinyl ether) PEVE
- perfluoro (butyl) Vinyl ether) PBVE
- other perfluoro (alkyl vinyl) Ether) PAVE fluoroolefin (but having no hydrogen atom in an unsaturated group such as, excluding TFE.), And the like.
- 1 type (s) or 2 or more types can be used for another monomer.
- FAE a compound represented by the general formula CH 2 ⁇ CX (CF 2 ) n Y
- X and Y are each independently a hydrogen atom or a fluorine atom, and n is an integer of 2 to 8). It is a compound represented. If n in the formula is less than 2, the properties of ETFE may be insufficient (for example, occurrence of stress cracks in the ETFE formed body). On the other hand, if n in the formula exceeds 8, the point of polymerization reactivity May be disadvantageous.
- n CH (CF 2 ) a compound represented by n Y is preferred.
- the content of repeating units based on other monomers in the fluorinated copolymer (A) is preferably 0.01 to 20 mol% with respect to the total repeating units of the fluorinated copolymer (A).
- the content is more preferably 0.1 to 15 mol%, and most preferably 1 to 10 mol%.
- the stress crack resistance of the molded product formed from the fluorine-containing copolymer composition is lowered, and under stress Breaking phenomena such as cracking may occur, and if it exceeds the range of 0.01 to 20 mol%, the mechanical strength of the composition may decrease.
- the melt viscosity at the melting point + 15 ° C. is 1500 to 35000 Pa ⁇ s, preferably 1500 to 32000 Pa ⁇ s, and more preferably 1500 to 30000 Pa ⁇ s. When it is in the range of 1500 to 35000 Pa ⁇ s, a fluorinated copolymer having high mechanical strength is obtained.
- the melting point of the fluorinated copolymer (A) in the present invention is preferably from 120 to 280 ° C, more preferably from 150 to 270 ° C, most preferably from 160 to 265 ° C.
- the fluorine-containing copolymer (B) in the present invention has a lower molecular weight than that of the fluorine-containing copolymer (A), a melt viscosity at a melting point of + 15 ° C. of 50 to 3000 Pa ⁇ s, a repeating unit based on TFE and E And a fluorine-containing copolymer having a repeating unit based on the above.
- the content ratio (molar ratio) of the repeating unit based on TFE and the repeating unit based on E is preferably 80/20 to 30/70, more preferably 75/25 to 35/65, and most preferably 65/35 to 40/60. .
- the fluorine-containing copolymer (B) includes a repeating unit based on one or more types of other monomers as long as the essential characteristics are not impaired. May be included.
- the same monomer as the other monomer in the fluorine-containing copolymer (A) can be used.
- examples of other preferable monomers include the same monomers.
- the content of repeating units based on other monomers in the fluorine-containing copolymer (B) is 0.01 to 20 mol% with respect to all the repeating units of the fluorine-containing copolymer (B). Preferably, it is 0.1 to 15 mol%, more preferably 1 to 10 mol%.
- the stress crack resistance of the composition may be lowered. When it exceeds, the heat resistance of the said composition may fall.
- the melt viscosity at the melting point + 15 ° C. is 50 to 3000 Pa ⁇ s, preferably 60 to 2800 Pa ⁇ s, and more preferably 70 to 2700 Pa ⁇ s.
- the fluidity is high and the moldability is good.
- the production method of the present invention is characterized in that a uniform mixed composition can be obtained even if the difference in melt viscosity between the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) is large.
- the melt viscosity of the fluorine-containing copolymer (B) at a temperature of the melting point of the fluorine-containing copolymer (A) + 15 ° C. is 1 / of the melt viscosity of the fluorine-containing copolymer (A) at the same temperature. 5 or less.
- the melt viscosity may be 1/8 or less, or may be 1/10 or less, and a uniform mixed composition can be obtained.
- the melting point of the fluorinated copolymer (B) in the present invention is preferably 120 to 280 ° C, more preferably 150 to 270 ° C, and most preferably 160 to 265 ° C.
- melt viscosity (melt fluidity) of the fluorinated copolymer (A) and the fluorinated copolymer (B) in the present invention is preferably measured with a capillary fluidity measuring device (capillary rheometer). This is obtained by extruding molten resin at a constant speed, passing through a capillary, and measuring the stress required for extrusion.
- a capillary fluidity measuring device capillary rheometer
- the melt fluidity of the fluorinated copolymer in the present invention is set in an orifice having a diameter of 1 mm and a length of 10 mm in a melt fluidity measuring device “Capillograph” manufactured by Toyo Seiki Seisakusho Co., Ltd. Measured at 240 ° C. and piston speed of 10 mm / min.
- the temperature for melting the fluorinated copolymer is preferably 5 to 30 ° C. higher than the melting point of the fluorinated copolymer.
- the fluorine-containing copolymer does not melt sufficiently, making measurement difficult. If measured under conditions much higher than this temperature, a highly fluid fluorine-containing copolymer has a viscosity of The measurement is difficult because the melted fluorine-containing copolymer flows out of the orifice in a short time because it is too low. In the present invention, the viscosity measured at a temperature 15 ° C. higher than the melting point is taken as the melt viscosity.
- the melting point of the fluorinated copolymer (A) and the fluorinated copolymer (B) in the present invention as shown in Examples below, using a scanning differential thermal analyzer (manufactured by Seiko Instruments Inc., DSC220CU) It is a value obtained from an endothermic peak when heated from room temperature to 300 ° C. at 10 ° C./min in an air atmosphere.
- the method for producing the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) in the present invention includes (1) a method for adjusting the molecular weight during polymerization, and (2) a fluorine-containing copolymer obtained by polymerization.
- a method of cutting a molecule by applying energy such as heat or radiation to lower the viscosity and (3) a method of manufacturing by chemically cutting a molecular chain of a fluorine-containing copolymer obtained by polymerization with a radical
- a fluorine-containing copolymer and an organic peroxide are melt-kneaded with an extruder and the molecular chain of the fluorine-containing copolymer is cleaved and generated by a generated radical.
- any method can be applied.
- the method (1) is more preferable because an active functional group is hardly generated in the resulting fluorine-containing copolymer and productivity is high.
- TFE and E are inserted into a reactor and generally used. It is possible to employ a copolymerization method using a radical polymerization initiator or a chain transfer agent.
- polymerization methods include bulk polymerization, solution polymerization using organic solvents such as fluorinated hydrocarbons, chlorinated hydrocarbons, fluorinated chlorohydrocarbons, alcohols and hydrocarbons as polymerization media; Examples thereof include suspension polymerization using an aqueous medium and, if necessary, an appropriate organic solvent; emulsion polymerization using an aqueous medium and an emulsifier as the polymerization medium.
- Solution polymerization in which TFE and E which are fluorine-containing monomers are copolymerized in the presence of a radical polymerization initiator, a chain transfer agent and a polymerization medium is most preferable.
- the polymerization can be carried out as a batch operation or a continuous operation using a one-tank or multi-tank stirring polymerization apparatus, a tube polymerization apparatus, or the like.
- an initiator having a half-life of 10 hours and a temperature of 0 to 100 ° C. is preferable, and an initiator having a temperature of 20 to 90 ° C. is more preferable.
- azo compounds such as azobisisobutyronitrile; peroxydicarbonates such as diisopropylperoxydicarbonate; peroxyesters such as tert-butylperoxypivalate, tert-butylperoxyisobutyrate, tert-butylperoxyacetate;
- Non-fluorinated diacyl peroxides such as ril peroxide, octanoyl peroxide, benzoyl peroxide, lauroyl peroxide; (Z (CF 2 ) p COO) 2 (where Z is a hydrogen atom, a fluorine atom or a chlorine atom, and p is 1
- a fluorine-containing diacyl peroxide such as potassium persulfate
- Examples of the polymerization medium include organic solvents such as fluorinated hydrocarbons, chlorinated hydrocarbons, fluorinated chlorinated hydrocarbons, alcohols and hydrocarbons, and aqueous media as described above.
- Chain transfer agents include alcohols such as methanol and ethanol; chlorofluorohydrocarbons such as 1,3-dichloro-1,1,2,2,3-pentafluoropropane and 1,1-dichloro-1-fluoroethane; Examples thereof include hydrocarbons such as pentane, hexane, and cyclohexane.
- the addition amount of the chain transfer agent is usually about 0.01 to 100% by mass with respect to the polymerization medium.
- the melt viscosity (molecular weight) of the resulting fluorinated copolymer can be adjusted. That is, the higher the chain transfer agent concentration, the lower the molecular weight fluorine-containing copolymer.
- 1,3-dichloro-1,1,2,2,3-pentafluoropropane is usually used as a polymerization medium as a chain transfer agent. It is also preferable to use as.
- the polymerization conditions are not particularly limited, but the polymerization temperature is usually preferably 0 to 100 ° C, more preferably 20 to 90 ° C.
- the polymerization pressure is preferably from 0.1 to 10 MPa, more preferably from 0.5 to 3 MPa. The higher the polymerization pressure is within the above range, the higher the polymer obtained and the higher the melt viscosity.
- the melt viscosity of the produced fluorocopolymer can be adjusted by adjusting the polymerization pressure.
- the polymerization time may vary depending on the polymerization temperature and polymerization pressure, but is usually 1 to 30 hours, and more preferably 2 to 10 hours.
- the concentration of the fluorinated copolymer with respect to the polymerization medium at the end of the polymerization reaction is usually about 0.03 to 0.2 g / cm 3 .
- the molecular weight of the fluorinated copolymer can be adjusted by adjusting this concentration. That is, the lower the fluorine-containing copolymer concentration at the time of polymerization, the lower the molecular weight fluorine-containing copolymer is obtained.
- the fluorinated copolymer composition of the present invention comprises the fluorinated copolymer (A) and the fluorinated copolymer at a temperature below the melting point of the fluorinated copolymer (A) and the fluorinated copolymer (B).
- the mixture (D) containing the solvent (C) capable of dissolving the coalescence (B) is brought to a temperature higher than the temperature at which the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) are dissolved in the solvent (C).
- the solvent (C) is first mixed with the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) to obtain a mixture (D).
- a batch-type kneading device, a pressure vessel with a stirring device, or the like is used for mixing. Subsequently, it melt
- the high molecular weight fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) having a lower molecular weight than the fluorine-containing copolymer (A) are simultaneously dissolved.
- Mixing in a low-viscosity state that cannot be achieved by melt kneading without (C) is possible, a high-molecular weight polymer is highly entangled, and a fluorine-containing composition having good melt moldability is obtained even after the solvent (C) is removed. It is done.
- the extremely high molecular weight fluorine-containing copolymer (A) can also be mixed with the low molecular weight fluorine-containing copolymer (B) by dissolving it in the solvent (C).
- the mass ratio of the fluorine-containing copolymer (A) / the fluorine-containing copolymer (B) is preferably 1/1 to 1/15, more preferably 1/1 to 1/14, and 1/1 to 1/12. Is more preferable, and 1/1 to 1/10 is most preferable. When it is in the range of 1/1 to 1/15, a fluorine-containing composition having high mechanical properties and good fluidity can be obtained.
- a stirrer usually used for preparing various solutions can be used without particular limitation. In order to dissolve in a shorter time and obtain a uniform solution, the solvent (C), the fluorinated copolymer (A), and the fluorinated copolymer (B) must be well stirred.
- a stirring device specifically, a homomixer, a Henschel mixer, a Banbury mixer, a batch-type kneading device such as a pressure kneader, a pressure vessel with a stirring device, or a kneading device such as an extruder or a kneader.
- a pressure vessel equipped with the stirring device for example, an autoclave with a stirrer, is used.
- a marine propeller blade, a paddle blade, an anchor blade, a turbine blade, or the like is used.
- the melting temperature is preferably equal to or higher than the temperature at which the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) are dissolved in the solvent (C).
- the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B ) And the phase separation temperature of the solvent (C) + 10 ° C. or more is more preferable. Specifically, 40 to 230 ° C. is more preferable, and 40 to 200 ° C. is more preferable.
- the solvent (C) is a fluorine-containing copolymer (A) and a fluorine-containing copolymer at a temperature lower than the melting point of the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) under normal pressure or pressure. It is a solvent that can dissolve the copolymer (B).
- the ETFE can be dissolved at a temperature lower than the melting point of the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B)” means that the fluorine-containing copolymer (A) and the fluorine-containing copolymer ( This does not mean that the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) can be dissolved at all temperatures below the melting point of B), but the fluorine-containing copolymer (A) and the fluorine-containing copolymer.
- the solvent (C) is preferably one that is at least one selected from the group consisting of fluorine-containing aromatic compounds, aliphatic compounds having one or more carbonyl groups, and hydrofluoroalkyl ethers.
- the solvent (C) may be one that cannot dissolve the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) at room temperature.
- the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) can be dissolved by heating at a temperature lower than the melting point of at least the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B), and transparent And a solvent which gives a uniform solution of the fluorinated copolymer (A) and the fluorinated copolymer (B).
- the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) are used at a temperature not higher than the melting point of the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B). Solvents capable of dissolving 0.1% by mass or more are preferred.
- the amount by which the solvent (C) can dissolve the fluorinated copolymer (A) and the fluorinated copolymer (B) is more preferably 5% by mass or more, most preferably 10% by mass or more.
- the melting point of the fluorinated aromatic compound capable of dissolving the fluorinated copolymer (A) and the fluorinated copolymer (B) is preferably 230 ° C. or lower, more preferably 200 ° C. or lower, and more preferably 180 ° C. or lower. When the melting point is within this range, the handleability when dissolving the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) is excellent.
- the fluorine content in the fluorine-containing aromatic compound (fluorine atom weight ⁇ number of fluorine atoms in molecule) ⁇ 100 / molecular weight) is preferably 5 to 75% by mass, more preferably 9 to 75% by mass, and more preferably 12 to Most preferred is 75% by weight. Within this range, the solubility of the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) is excellent.
- the fluorine-containing aromatic compound examples include fluorine-containing benzonitrile, fluorine-containing benzoic acid and its ester, fluorine-containing polycyclic aromatic compound, fluorine-containing nitrobenzene, fluorine-containing phenyl alkyl alcohol, fluorine-containing phenol and its ester, fluorine-containing Aromatic ketone, fluorine-containing aromatic ether, fluorine-containing aromatic sulfonyl compound, fluorine-containing pyridine compound, fluorine-containing aromatic carbonate, perfluoroalkyl-substituted benzene, perfluorobenzene, polyfluoroalkyl ester of benzoic acid, polyfluoroalkyl of phthalic acid Examples include esters and aryl esters of trifluoromethanesulfonic acid.
- the fluorine-containing aromatic compound is preferably a fluorine-containing aromatic compound having at least two or more fluorine atoms.
- fluorine-containing aromatic compound More preferable specific examples of the fluorine-containing aromatic compound include pentafluorobenzonitrile, 2,3,4,5-tetrafluorobenzonitrile, 2,3,5,6-tetrafluorobenzonitrile, 2,4, 5-trifluorobenzonitrile, 2,4,6-trifluorobenzonitrile, 3,4,5-trifluorobenzonitrile, 2,3-difluorobenzonitrile, 2,4-difluorobenzonitrile, 2,5-difluoro Benzonitrile, 2,6-difluorobenzonitrile, 3,4-difluorobenzonitrile, 3,5-difluorobenzonitrile, 4-fluorobenzonitrile, 3,5-bis (trifluoromethyl) benzonitrile, 2- (tri Fluoromethyl) benzonitrile, 3- (trifluoromethyl) benzonitrile 4- (trifluoromethyl) benzonitrile, 2- (trifluoromethoxy)
- Pentafluorobenzoic acid ethyl pentafluorobenzoate, methyl 2,4-difluorobenzoate, methyl 3- (trifluoromethyl) benzoate, methyl 4- (trifluoromethyl) benzoate, 3,5-bis (trifluoro) Methyl) methyl benzoate, perfluorobiphenyl, perfluoronaphthalene, pentafluoronitrobenzene, 2,4-difluoronitrobenzene, (3-nitrophenyl) sulfur pentafluoride, pentafluorobenzyl alcohol, 1- (pentafluorophenyl) ethanol, pentaacetate Fluorophenyl, pentafluorophenyl propanoate, pentafluorophenyl butanoate, pentafluorophenyl pentanoate, perfluorobenzophenone, 2,3,4,5,6-pentafluorobenzophenone, ', 3', 4 '
- the melting point of the aliphatic compound having one or more carbonyl groups capable of dissolving the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) is preferably 220 ° C. or less, more preferably 50 ° C. or less. 20 ° C. or less is most preferable. Moreover, it is preferable that the boiling point of the aliphatic compound having one or more carbonyl groups is equal to or higher than the temperature at which the fluorine-containing copolymer is dissolved.
- the boiling point of the aliphatic compound having one or more carbonyl groups is An aliphatic compound having one or more carbonyl groups having a temperature lower than the melting temperature is also applicable.
- the “naturally generated pressure” means a pressure that the mixture (D) of the solvent (C), the fluorine-containing copolymer (A), and the fluorine-containing copolymer (B) naturally shows in the closed container. .
- the spontaneously generated pressure increases, so that the boiling point of the aliphatic compound having at least one carbonyl group is considered from the viewpoint of safety and convenience.
- the upper limit of the boiling point of the aliphatic compound having one or more carbonyl groups is not particularly limited, but is preferably 220 ° C. or lower from the viewpoint of ease of drying in the drying step.
- Examples of the aliphatic compound having one or more carbonyl groups include cyclic ketones having 3 to 10 carbon atoms, ketones such as chain ketones, esters such as chain esters, glycol monoether monoesters, and carbonates. What is 1 or more types chosen from the group which consists of is preferable.
- the number of carbonyl groups is preferably 1 or 2.
- the molecular structure of the aliphatic compound having one or more carbonyl groups is not particularly limited.
- the carbon skeleton may be linear, branched or cyclic, and may have etheric oxygen between carbon-carbon bonds constituting the main chain or side chain, and bonded to a carbon atom.
- a part of hydrogen atoms may be substituted with a halogen atom such as a fluorine atom.
- a halogen atom such as a fluorine atom.
- cyclic ketones are more preferable as the aliphatic compound having one or more carbonyl groups. These may be used alone or in combination of two or more.
- More preferable specific examples of the aliphatic compound having one or more carbonyl groups in the present invention include the following compounds.
- the cyclic ketone include cyclopentanone, cyclohexanone, 2-methylcyclohexanone, 3-methylcyclohexanone, 4-ethylcyclohexanone, 2,6-dimethylcyclohexanone, 3,3,5-trimethylcyclohexanone, 4-tert-butylcyclohexanone, Examples include cycloheptanone and isophorone.
- chain ketone examples include acetone, methyl ethyl ketone, 2-pentanone, methyl isopropyl ketone, 2-hexanone, methyl isobutyl ketone, 2-heptanone, 2-octanone, 2-nonanone, diisobutyl ketone, 2-decanone and the like.
- chain ester examples include ethyl formate, isopentyl formate, methyl acetate, ethyl acetate, butyl acetate, isobutyl acetate, pentyl acetate, isopentyl acetate, hexyl acetate, cyclohexyl acetate, 2-ethylhexyl acetate, ethyl butyrate, butyl butyrate, pentyl butyrate Bis (2,2,2-trifluoroethyl) adipate, methyl cyclohexanecarboxylate, 2,2,2-trifluoroethyl cyclohexanecarboxylate, ethyl perfluoropentanoate and the like.
- Examples of monoether monoesters of the glycols include 2-methoxyethyl acetate, 2-ethoxyethyl acetate, 2-butoxyethyl acetate, 1-methoxy-2-acetoxypropane, 1-ethoxy-2-acetoxypropane, 3-acetic acid 3- Examples thereof include methoxybutyl and 3-methoxy-3-methylbutyl acetate.
- Examples of the carbonate include bis (2,2,3,3-tetrafluoropropyl) carbonate, bis (2,2,2-trifluoroethyl) carbonate, diethyl carbonate, propylene carbonate, and the like.
- hydrofluoroalkyl ethers that can dissolve the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) include 1,1,1,2,3,3-hexafluoro-4- (1 , 1,2,3,3,3-hexafluoropropoxy) pentane, 1,1,1,2,2,3,4,5,5,5-decafluoro-3-methoxy-4- (trifluoromethyl) ) Pentane etc. Of these, 1,1,1,2,3,3-hexafluoro-4- (1,1,2,3,3,3-hexafluoropropoxy) pentane is preferable.
- the solvent (C) that can dissolve the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) may be used alone or in combination of two or more.
- the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) up to the melting point of the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) or the boiling point of the solvent (C).
- a medium that does not dissolve or swell is defined as a non-solvent.
- the fluorine-containing copolymer (A) and the fluorine-containing copolymer (A) and the fluorine-containing copolymer (A) are used within the range not impairing the solubility of the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B).
- the lower limit of the temperature for preparing the mixed solution of the fluorinated copolymer in this dissolution step is the phase separation temperature of the solution at a predetermined concentration.
- the fluorine-containing copolymer (A) and the mixture (D) containing the fluorine-containing copolymer (B) and the solvent (C) are in two phases at or below the phase separation temperature. Therefore, it does not become a uniform solution state. That is, the solution can be prepared only at a temperature higher than the phase separation temperature. Further, the temperature of the obtained fluorine-containing copolymer solution is not a problem even when the temperature is higher than the melting point.
- the deterioration of the fluorine-containing copolymer (A), the fluorine-containing copolymer (B) and the solvent (C) and the solvent (C ) Is preferably below the melting point of the fluorinated copolymer, and more preferably at or above the phase separation temperature of the mixed solution of the fluorinated copolymer (A) and the fluorinated copolymer (B).
- the dissolution temperature is indicated by taking the temperature on the vertical axis and the concentration ratio of the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) to the solvent (C) on the horizontal axis. It is preferable to optimize by the phase diagram which plotted the density
- the dissolution temperature is preferably a temperature that is 5 ° C. or more higher than the phase separation temperature of the solution to be prepared, and more preferably a temperature that is 10 ° C. or more higher than the phase separation temperature.
- the upper limit of the dissolution temperature is not particularly limited, but from the viewpoint of easiness of making porous particles, volatility of the solvent (C), etc., the fluorine-containing copolymer (A) and fluorine-containing copolymer to be dissolved are used. It is preferable that it is below the melting point of a polymer (B).
- the phase separation temperature is also called a cloud point (cloud point).
- cloud point a solute (in the present invention, a fluorine-containing copolymer ( A) and the fluorinated copolymer (B)) and the solvent (C) form a uniform one-phase solution, but below the cloud point, the phase separation temperature.
- the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) are brought to the phase separation temperature or lower, the phase containing the solvent (C) and the fluorine-containing copolymer is concentrated, and the fluorine-containing copolymer It is separated into two phases containing a polymer and a rich phase of solvent (C). Further, below the crystallization temperature of the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) to be used, the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) are in a rich phase.
- the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) are fixed to form a porous precursor. For this reason, in order to prepare a fluorine-containing mixed solution, mixing at a phase separation temperature or higher is preferable.
- the solvent content is preferably 20/1 to 1/20 in mass ratio of solvent (C) / (total amount of fluorine-containing copolymer (A) and fluorine-containing copolymer (B)). 1 to 1/15 is more preferable, and 10/1 to 1/10 is more preferable.
- the fluorine-containing copolymer composition of the present invention may contain the following fillers, fillers, pigments and the like in order to develop various properties.
- fiber reinforcing materials such as carbon fiber, glass fiber, and aramid fiber
- dimensional stability imparting materials such as glass beads
- Conductive or semiconductive fillers Transparent conductivity imparting agents such as ionic liquids; Various whisker / potassium titanate, aluminum borate, carbon whisker, calcium carbonate whisker and other surface property modifiers; graphite, magnesium oxide, low melting point Materials for imparting thermal conductivity such as metals and metal fibers; Materials for imparting slidability such as PTFE lubricants; Electromagnetic wave shielding materials such as ferrite and metals; Low gas permeation and reinforcing materials such as nanoclay, fluorinated organically treated nanoclay and talc; Light weight materials such as glass balloons, various elastomers, fluoro rubber, etc.
- Softening material nylon, high strength-imparting material such as aramid; Titanium oxide, zinc oxide, carbon black, copper / chromium black, molybdate orange, iron oxide, yellow lead, yellow iron oxide, titanium yellow, titanium / antimony / chromium yellow, chromium green, chromium oxide green, cobalt green, etc.
- a crosslinking agent such as a crystal nucleating agent or triallyl isocyanurate, a crosslinking aid, a foaming agent, a foaming core material, a heat stabilizer; Additives such as copper, copper compounds (such as copper oxide and copper iodide), antioxidants, light stabilizers, and ultraviolet absorbers can be blended and used.
- the fluorine-containing copolymer composition of the present invention has a very low viscosity in the solution state by using the solvent (C), the above-mentioned various particulate and fibrous fillers and pigments are molded. Without impairing the properties, it is possible to obtain a fluorine-containing copolymer composition that is blended and filled at a high density. Further, since the fluorine-containing copolymer composition has a high melt fluidity, it can be easily impregnated into a material such as a non-woven fabric, a glass fiber, an aramid fiber, a carbon fiber, and a porous material made of ceramics. it can.
- the medium is compatible with the solvent and has low solubility of the fluorinated copolymer (A) and the fluorinated copolymer (B). And a method of contacting the fluorine-containing copolymer composition, a method of immersing the fluorine-containing copolymer composition in the medium, and the like.
- the medium it is preferable to use a higher alcohol, acetone, a fluorine-containing copolymer (A), a non-solvent of the fluorine-containing copolymer (B), or the like.
- the solvent may be removed by performing vacuum suction from a vent port installed near the tip of the extruder cylinder. Further, the solvent in the fluorine-containing copolymer composition may be removed by drying under reduced pressure or the like.
- the fluorine-containing copolymer composition of the present invention can be easily molded by various molding methods such as injection molding, extrusion molding, blow molding, compression molding, inflation molding, transfer molding, etc. to obtain a desired molded body.
- Molded articles obtained from the fluorine-containing copolymer composition of the present invention include pump casings, diaphragm valve casings, joints, packing, sealing members, tubes, covered electric wires, sheets, films, linings, coatings, filaments, tent films, etc. In various fields such as film structure members and printed circuit boards.
- Example 1 In a sealed container, high molecular weight fluorine-containing copolymer (A1) (ETFE, E / TFE / (perfluorobutyl) in 100 g of isophorone at 200 ° C.
- A1 high molecular weight fluorine-containing copolymer
- the fluorine-containing copolymer was precipitated while the temperature was lowered to room temperature to form a gel.
- the gel-like fluorine-containing copolymer mixture D1 was immersed in 100 g of acetone at room temperature for 1 hour, and isophorone contained in the gel-like fluorine-containing copolymer mixture D1 was extracted into acetone.
- the fluorinated copolymer mixture D1 was separated from the acetone / isophorone solution and dried at 180 ° C. to obtain a composition 1 of the fluorinated copolymer (B1) and the fluorinated copolymer (A1).
- the obtained composition 1 was used for testing.
- the melt breaking tension was 23.8 mN.
- the take-up speed was 77.9 m / min.
- Example 2 A composite kneading extruder manufactured by Imoto Seisakusho Co., Ltd. was used as a mixing stirrer.
- the fluorinated copolymer (A2), the fluorinated copolymer (B2), and isophorone were mixed together to form a transparent and uniform solution state.
- isophorone / (total amount of fluorine-containing copolymer (A2) and fluorine-containing copolymer (B2)) 43.7 / 56.3 (mass ratio)
- fluorine-containing copolymer (A2) / Fluorine-containing copolymer (B2) 20/80 (mass ratio).
- the fluorine-containing copolymer composition of the present invention is a composition excellent in uniformity of a high molecular weight fluorine-containing copolymer and a low molecular weight fluorine-containing copolymer, and has good melt moldability, high strength, and extrusion. It is possible to produce a molded body and an injection molded body with high productivity, and it is also suitable for manufacturing a fine extrusion molded body and an injection molded body.
- the entire contents of the specification, claims, and abstract of Japanese Patent Application No. 2010-094734 filed on April 16, 2010 are incorporated herein as the disclosure of the specification of the present invention. Is.
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Abstract
Description
また、成型品の強度向上、寸法安定性、導電性付与、電磁波シールド性、表面性向上、着色等のために、種々の充填材、顔料、添加剤を必要に応じて配合・充填することが望ましいが、充填材等を従来のETFEに高配合・高充填した場合、溶融粘度が高くなって、成形性が悪化するという問題があった。
従来、ETFEに関し、その溶融流動性を高くするために分子量を低くすると、得られる成形体の耐熱性や機械特性が低下するという問題があった。特に、低分子量化することによりETFE成形体の引張伸度が低下することが、成形体の用途拡大に対する大きな障害となっている。
[1]融点+15℃での溶融粘度が1500~35000Pa・sであり、テトラフルオロエチレンに基づく繰返し単位とエチレンに基づく繰返し単位とを有する高分子量の含フッ素共重合体(A)と、融点+15℃での溶融粘度が50~3000Pa・sであり、前記含フッ素共重合体(A)の融点+15℃の温度での溶融粘度が前記含フッ素共重合体(A)の前記同温度での溶融粘度の1/5以下であり、前記含フッ素共重合体(A)よりテトラフルオロエチレンに基づく繰返し単位とエチレンに基づく繰返し単位とを有する低分子量の含フッ素共重合体(B)と、前記含フッ素共重合体(A)及び含フッ素共重合体(B)の融点以下の温度で該含フッ素共重合体(A)及び含フッ素共重合体(B)を溶解しうる溶媒(C)とを含む混合物(D)を、含フッ素共重合体(A)及び含フッ素共重合体(B)が該溶媒(C)に溶解する温度以上に加熱して溶液状態にし、次いで溶媒(C)を除去することを特徴とする含フッ素共重合体組成物の製造方法。
[3]前記含フッ素共重合体(A)中の(テトラフルオロエチレンに基づく繰返し単位)/(エチレンに基づく繰返し単位)のモル比が、80/20~30/70であり、かつ、含フッ素共重合体(A)の全繰り返し単位に対して、テトラフルオロエチレンに基づく繰返し単位とエチレンに基づく繰返し単位の合計量が80モル%超である含フッ素共重合体である、[1]または[2]に記載の含フッ素共重合体組成物の製造方法。
[5]前記溶媒(C)が、含フッ素芳香族化合物、カルボニル基を1個以上有する脂肪族化合物、および、ハイドロフルオロアルキルエーテルからなる群から選ばれる少なくとも一種である、[1]~[4]のいずれかに記載の含フッ素共重合体組成物の製造方法。
[7]前記混合物(D)の加熱温度が、含フッ素共重合体(A)及び含フッ素共重合体(B)の融点未満の温度である、[1]~[6]のいずれかに記載の含フッ素共重合体組成物の製造方法。
[9]上記[1]~[8]のいずれかに記載の製造方法で製造された含フッ素共重合体組成物を成形してなるフッ素樹脂成形体。
[10]前記フッ素樹脂成形体がフィルムである上記[9]に記載のフッ素樹脂成形体。
本明細書において、組成物とは、含フッ素共重合体(A)及び含フッ素共重合体(B)を混合したものをいう。
(含フッ素共重合体(A))
本発明における含フッ素共重合体(A)は、融点+15℃での溶融粘度が1500~35000Pa・sであり、テトラフルオロエチレンに基づく繰返し単位とエチレンに基づく繰返し単位とを有する高分子量の含フッ素共重合体である。テトラフルオロエチレン(以下、「TFE」と称する場合がある。)に基づく繰返し単位とエチレン(以下、「E」と称する場合がある。)に基づく繰返し単位との含有比(モル比)は80/20~30/70が好ましく、75/25~35/65がより好ましく、65/35~40/60が最も好ましい。
また、含フッ素共重合体(A)には、上記TFEに基づく繰返し単位及びEに基づく繰返し単位に加えて、その本質的な特性を損なわない範囲で他のモノマーの一種類以上に基づく繰返し単位を含んでもよい。
含フッ素共重合体(A)における他のモノマーに基づく繰返し単位の含有量は、含フッ素共重合体(A)の全繰返し単位に対して、0.01~20モル%であることが好ましく、0.1~15モル%であることがより好ましく、1~10モル%であることが最も好ましい。他のモノマーに基づく繰返し単位の含有量が0.01~20モル%の範囲未満であると、含フッ素共重合体組成物から形成される成形体の耐ストレスクラック性が低下し、ストレス下において割れる等の破壊現象が発生する場合があり、0.01~20モル%の範囲を超えると、当該組成物の機械的強度が低下する場合がある。
本発明における含フッ素共重合体(A)の融点は120~280℃が好ましく、150~270℃がより好ましく、160~265℃が最も好ましい。
本発明における含フッ素共重合体(B)は、前記含フッ素共重合体(A)より低分子量で、融点+15℃での溶融粘度が50~3000Pa・sであり、TFEに基づく繰り返し単位とEに基づく繰り返し単位とを有する含フッ素共重合体である。TFEに基づく繰返し単位とEに基づく繰返し単位の含有比(モル比)は80/20~30/70が好ましく、75/25~35/65がより好ましく、65/35~40/60が最も好ましい。
また、含フッ素共重合体(B)には、TFEに基づく繰返し単位及びEに基づく繰返し単位に加えて、その本質的な特性を損なわない範囲で他のモノマーの一種類以上に基づく繰返し単位を含んでもよい。
本発明の製造方法は、含フッ素共重合体(A)と含フッ素共重合体(B)の溶融粘度の差が大きくても、均一な混合組成物にすることができる特徴がある。
前記含フッ素共重合体(A)の融点+15℃の温度での含フッ素共重合体(B)の溶融粘度は、前記含フッ素共重合体(A)の前記同温度での溶融粘度の1/5以下である。該溶融粘度は、1/8以下であっても、さらに1/10以下であってもよく、均一な混合組成物ができる。本発明における含フッ素共重合体(B)の融点は120~280℃が好ましく、150~270℃がより好ましく、160~265℃が最も好ましい。
本発明における含フッ素共重合体(A)及び含フッ素共重合体(B)の溶融粘度(溶融流動性)は、キャピラリー流動性測定装置(キャピラリーレオメータ)によって測定することが好ましい。これは、溶融した樹脂を、一定速度で押出してキャピラリーを通過させ、押し出すのに要する応力を測定することにより求めるものである。含フッ素共重合体の分子量が低いと、当該含フッ素共重合体の溶融粘度も低く、当該含フッ素共重合体の分子量が高いと、その溶融粘度も高い。
ここで、含フッ素共重合体を溶融させる温度は、当該含フッ素共重合体の融点よりも5~30℃高い温度が好ましい。この温度よりも低い条件で測定すると含フッ素共重合体が十分に溶融せず、測定が困難となり、この温度よりもあまり高い条件で測定すると、流動性の高い含フッ素共重合体では、粘度が低すぎて溶融含フッ素共重合体が短時間にオリフィスから流出してしまい測定が困難となる。本発明では、融点から15℃高い温度で測定した粘度を溶融粘度とする。
本発明における含フッ素共重合体(A)及び含フッ素共重合体(B)の融点は、後記実施例に示すように、走査型示差熱分析器(セイコーインスツルメンツ社製、DSC220CU)を用いて、空気雰囲気下に室温から300℃まで10℃/分で加熱した際の吸熱ピークから求めた値である。
本発明における含フッ素共重合体(A)及び含フッ素共重合体(B)を製造する方法としては、(1)重合時に分子量を調整する方法、(2)重合により得られた含フッ素共重合体を熱や放射線といったエネルギーを加えることにより分子を切断し低粘度化する方法、(3)重合して得られた含フッ素共重合体の分子鎖をラジカルによって化学的に切断して製造する方法、具体的には含フッ素共重合体と有機過酸化物を押出機で溶融混練し含フッ素共重合体の分子鎖を発生ラジカルにより切断・低粘度化する方法がある。原理的にはいずれの方法も適用可能である。ただし、(2)~(3)の方法の場合は、含フッ素共重合体中の切断部位にカルボニル基等の活性な官能基が生成し、望ましくない接着性等が生じやすい問題がある。一方、(1)の方法は、得られる含フッ素共重合体中に活性な官能基が生成しにくく、生産性が高いことから、より好ましい。
連鎖移動剤としては、メタノール、エタノール等のアルコール;1,3-ジクロロ-1,1,2,2,3-ペンタフルオロプロパン、1,1-ジクロロ-1-フルオロエタン等のクロロフルオロハイドロカーボン;ペンタン、ヘキサン、シクロヘキサン等のハイドロカーボン等が挙げられる。連鎖移動剤の添加量は、通常重合媒体に対して、0.01~100質量%程度である。連鎖移動剤の濃度を調節することにより、得られる含フッ素共重合体の溶融粘度(分子量)を調節することができる。すなわち、連鎖移動剤の濃度を高くするほど低分子量の含フッ素共重合体が得られる。
重合条件は特に限定されるものではないが、重合温度は通常0~100℃が好ましく、20~90℃がより好ましい。
重合圧力は0.1~10MPaが好ましく、0.5~3MPaがより好ましい。重合圧力が上記範囲で高くなるほど得られる重合体は高分子量化し、溶融粘度が高くなるので、重合圧力を調整することにより、製造される含フッ素共重合体の溶融粘度を調節することができる。
重合時間は重合温度及び重合圧力等により変わりうるが、通常1~30時間が好ましく、2~10時間がより好ましい。
本発明の含フッ素共重合体組成物は、前記含フッ素共重合体(A)及び含フッ素共重合体(B)の融点以下の温度で該含フッ素共重合体(A)及び含フッ素共重合体(B)を溶解しうる溶媒(C)とを含む混合物(D)を、含フッ素共重合体(A)及び含フッ素共重合体(B)が該溶媒(C)に溶解する温度以上に加熱し、次いで溶媒(C)を除去して製造する。
このような組成物の連続成形を行うと、含フッ素共重合体(A)の一部分が充分に溶融されずにブツとして残ったり、メルトフラクチャーといった流れ性のトラブルが発生する。繊維状に成形する場合は、組成物が不均一であることから、溶融伸びや溶融張力が一定せず、繊維が切れるといったトラブルが発生する。
また、極度に高分子量の含フッ素共重合体(A)と低分子量の含フッ素共重合体(B)とを溶融混練で混ぜる事は、両者の溶融粘度の差が大きい為に、均一に混ぜる事が困難であった。
溶媒(C)の存在によって、高分子量の含フッ素共重合体(A)と、前記含フッ素共重合体(A)より低分子量の含フッ素共重合体(B)とが同時に溶解するので、溶媒(C)のない溶融混練では成し得ない低粘度状態での混合が可能となり、高分子量体が高度に絡み合い、溶媒(C)を除去した後でも溶融成形性の良い含フッ素組成物が得られる。極度に高分子量の含フッ素共重合体(A)も溶媒(C)に溶解することで、低分子量の含フッ素共重合体(B)と混合できる。
溶媒(C)への含フッ素共重合体(A)及び含フッ素共重合体(B)の溶解には、通常各種溶液の作製に用いられる撹拌装置を、特に制限なく用いることができる。より短時間で溶解させ、均一な溶液を得るためには、溶媒(C)と含フッ素共重合体(A)と含フッ素共重合体(B)とをよく撹拌する必要がある。
溶解温度は、含フッ素共重合体(A)及び含フッ素共重合体(B)が溶媒(C)に溶解する温度以上が好ましく、含フッ素共重合体(A)及び含フッ素共重合体(B)と溶媒(C)の相分離温度+10℃以上であることがより好ましい。具体的には、40~230℃がより好ましく、40℃~200℃がより好ましい。
本発明における溶媒(C)は、常圧または加圧下において前記含フッ素共重合体(A)及び含フッ素共重合体(B)の融点以下の温度で含フッ素共重合体(A)及び含フッ素共重合体(B)を溶解しうる溶媒である。
「前記含フッ素共重合体(A)及び含フッ素共重合体(B)の融点以下の温度でETFEを溶解しうる」とは、前記含フッ素共重合体(A)及び含フッ素共重合体(B)の融点以下の全ての温度で前記含フッ素共重合体(A)及び含フッ素共重合体(B)を溶解できることを意味するのではなく、前記含フッ素共重合体(A)及び含フッ素共重合体(B)の融点以下の少なくとも一部の温度範囲で前記含フッ素共重合体(A)及び含フッ素共重合体(B)を溶解できるのであればよいことを意味する。
溶媒(C)としては、含フッ素芳香族化合物、カルボニル基を1個以上有する脂肪族化合物、および、ハイドロフルオロアルキルエーテルからなる群から選ばれる少なくとも一種であるものが好ましい。
該溶媒(C)としては、常温では上記含フッ素共重合体(A)及び含フッ素共重合体(B)を溶解できないものでもよい。少なくとも含フッ素共重合体(A)及び含フッ素共重合体(B)の融点より低い温度に加熱することにより含フッ素共重合体(A)及び含フッ素共重合体(B)を溶解でき、透明で均一な含フッ素共重合体(A)及び含フッ素共重合体(B)の溶液を与える溶媒が好ましい。
含フッ素共重合体(A)及び含フッ素共重合体(B)を溶解しうる含フッ素芳香族化合物の融点は、230℃以下が好ましく、200℃以下がより好ましく、180℃以下がより好ましい。融点がこの範囲にあると含フッ素共重合体(A)及び含フッ素共重合体(B)を溶解する時の取扱い性に優れる。また、含フッ素芳香族化合物中のフッ素含有量((フッ素原子量×分子中のフッ素原子数)×100/分子量)は、5~75質量%が好ましく、9~75質量%がより好ましく、12~75質量%が最も好ましい。この範囲にあると、含フッ素共重合体(A)及び含フッ素共重合体(B)の溶解性に優れる。
より低沸点のカルボニル基を1個以上有する脂肪族化合物を使用する場合には、自然発生圧力が大きくなるため、安全性、利便性の観点から、カルボニル基を1個以上有する脂肪族化合物の沸点は、室温以上が好ましく、50℃以上がより好ましい。また、上記カルボニル基を1個以上有する脂肪族化合物の沸点の上限は、特に制限されないが、乾燥工程の乾燥しやすさ等の観点から220℃以下が好ましい。
上記1個以上のカルボニル基を有する脂肪族化合物の分子構造は特に制限されない。例えば、炭素骨格は直鎖、分岐、環状のいずれであってもよく、主鎖、または側鎖を構成する炭素-炭素結合間にエーテル性酸素を有していてもよく、炭素原子に結合する水素原子の一部がフッ素原子等のハロゲン原子で置換されていてもよい。中でも、上記カルボニル基を1個以上有する脂肪族化合物としては環状ケトンがより好ましい。これらは一種を単独で用いてもよく、二種以上を併用してもよい。
上記環状ケトンとしては、シクロペンタノン、シクロヘキサノン、2-メチルシクロヘキサノン、3-メチルシクロヘキサノン、4-エチルシクロヘキサノン、2,6-ジメチルシクロヘキサノン、3,3,5-トリメチルシクロヘキサノン、4-tert-ブチルシクロヘキサノン、シクロヘプタノン、イソホロン等が挙げられる。
上記鎖状ケトンとしては、アセトン、メチルエチルケトン、2-ペンタノン、メチルイソプロピルケトン、2-ヘキサノン、メチルイソブチルケトン、2-ヘプタノン、2-オクタノン、2-ノナノン、ジイソブチルケトン、2-デカノン等が挙げられる。
上記カーボネートとしては、ビス(2,2,3,3-テトラフルオロプロピル)カーボネート、ビス(2,2,2-トリフルオロエチル)カーボネート、ジエチルカーボネート、プロピレンカーボネート等が挙げられる。
上記含フッ素共重合体(A)及び含フッ素共重合体(B)を溶解しうる溶媒(C)は、一種単独で用いてもよく、二種以上を併用してもよい。
ここで、この溶解工程における含フッ素共重合体の混合溶液を調製する温度の下限は、所定の濃度におけるその溶液の相分離温度である。以下に説明する通り少なくとも二種の化合物、ここでは含フッ素共重合体(A)及び含フッ素共重合体(B)と溶媒(C)を含む混合物(D)は、相分離温度以下では二相に分離をするため、均一な溶液の状態とはならない。
つまり、溶液の調製は相分離温度以上の温度でのみ可能となる。また、得られる含フッ素共重合体溶液の温度は、融点以上でも問題は無いが、含フッ素共重合体(A)及び含フッ素共重合体(B)や溶媒(C)の劣化や溶媒(C)の揮発があるため、含フッ素共重合体の融点以下が好ましく、含フッ素共重合体(A)及び含フッ素共重合体(B)混合溶液の相分離温度以上の温度がより好ましい。
一般に、含フッ素共重合体(A)及び含フッ素共重合体(B)溶液を相分離温度以下にすれば、溶媒(C)を含有し含フッ素共重合体が濃厚な相と、含フッ素共重合体を含有し溶媒(C)が濃厚な相の2相に分離する。さらに、用いる含フッ素共重合体(A)及び含フッ素共重合体(B)の結晶化温度以下では、含フッ素共重合体(A)及び含フッ素共重合体(B)が濃厚な相中において含フッ素共重合体(A)及び含フッ素共重合体(B)が固定化され、多孔体の前駆体が形成される。この為、含フッ素混合溶液を作成するには、相分離温度以上での混合が好ましい。 溶媒の含有量は、溶媒(C)/(含フッ素共重合体(A)及び含フッ素共重合体(B)の合計量)の質量比で、20/1~1/20が好ましく、15/1~1/15がより好ましく、10/1~1/10がさらに好ましい。
本発明の含フッ素共重合体組成物には、種々の特性を発現させるため、以下の充填剤、フィラー、顔料等を含有してもよい。たとえば、炭素繊維、ガラス繊維、アラミド繊維などの繊維強化材;硝子ビーズなどの寸法安定性付与材;カーボンブラック、カーボンナノチューブ、フッソ化処理CNT、酸化第2スズ、チタン酸ブラック、チタン酸ウィスカー等の導電性又は半導電性フィラー;イオン性液体等透明導電性付与剤;各種ウィスカー/チタン酸カリ、ホウ酸アルミニウム、カーボンウィスカー、炭酸カルシウムウィスカーなど表面性改質剤;グラファイト、酸化マグネシウム、低融点金属、金属ファイバーなどの熱伝導性付与材;PTFEルブリカント等の摺動性付与材;フェライト、金属等の電磁波シールド材;ナノクレー、フッ素系有機化処理ナノクレー、タルク等の低ガス透過、強化材;硝子バルーン等の軽量化材、各種エラストマー、フッ素ゴム等の柔軟性付与材;ナイロン、アラミド等の高強度付与材;
酸化チタン、酸化亜鉛、カーボンブラック、銅・クロムブラック、モリブデートオレンジ、酸化鉄、黄鉛、黄色酸化鉄、チタンイエロー、チタン・アンチモン・クロムイエロー、クロムグリーン、酸化クロムグリーン、コバルトグリーン等の着色顔料;さらには、結晶核剤、トリアリルイソシアヌレート等の架橋剤や架橋助剤、発泡剤、発泡核材、熱安定剤;
銅、銅化合物(酸化銅、ヨウ化銅など)、酸化防止剤、光安定剤、紫外線吸収剤等の添加剤を配合使用することができる。
含フッ素共重合体組成物に含まれる溶媒の除去には、該溶媒に対して相溶性があり、かつ含フッ素共重合体(A)及び含フッ素共重合体(B)の溶解性が低い媒体を含フッ素共重合体組成物に接触する方法や、該媒体に含フッ素共重合体組成物を浸漬する方法などが挙げられる。該媒体としては、高級アルコール、アセトン、含フッ素共重合体(A)及び含フッ素共重合体(B)の非溶媒などを用いることが好ましい。
中でも、抽出媒体として、含フッ素共重合体(A)及び含フッ素共重合体(B)の非溶媒を用いることがより好ましい。または、混合撹拌機として押出機等を使用した場合、押出機シリンダー先端付近に設置されたベント口から真空吸引を行い、溶媒を除去してもよい。また、含フッ素共重合体組成物中にある溶媒を減圧乾燥等で除去しても良い。
本発明の含フッ素共重合体組成物は、射出成形、押出成形、ブロー成形、圧縮成形、インフレーション成形、トランスファー成形など種々の成形方法により容易に成形し、所望の成形体とすることができる。本発明の含フッ素共重合体組成物から得られる成形体は、ポンプケーシング、ダイヤフラムバルブケーシング、継ぎ手類、パッキング、シール部材、チューブ、被覆電線、シート、フィルム、ライニング、コーティング、フィラメント、テント膜等の膜構造部材、プリント基板など幅広い分野のものが挙げられる。
〔融点(℃)〕
走査型示差熱分析器(セイコーインスツルメンツ社製、DSC220CU)を用いて、空気雰囲気下に室温から300℃まで10℃/分で加熱した際の吸熱ピークから求めた。
東洋精機製作所社製の溶融流動性測定装置「キャピログラフ」に直径1mm、長さ10mmのオリフィスをセットし、シリンダー温度は、含フッ素共重合体の融点から15℃高い温度で測定した。ピストンスピード10mm/分の条件で溶融した含フッ素共重合体(A)又は(B)を押し出し、溶融粘度を測定した。
〔溶融破断張力(mN)、引き取り速度(mm/min)〕
東洋精機製作所社製の溶融流動性測定装置「キャピログラフ」に直径1mm、長さ10mmのオリフィスをセットし、シリンダー温度は、融点から15℃高い温度で測定した。含フッ素共重合体(A)と含フッ素共重合体(B)との組成物を、ピストンスピード5mm/分の条件で押し出し、溶融破断張力を測定した。同時に、引き取り速度を計測した。
密閉容器内に、200℃のイソホロン(融点-8.1℃、沸点215.2℃)の100g中に高分子量の含フッ素共重合体(A1)(ETFE、E/TFE/(パーフルオロブチル)エチレン=46/54/1.4(モル比)、融点:260℃、溶融粘度:26540Pa・s(275℃))の1.0gと、低分子量の含フッ素共重合体(B1)(ETFE、E/TFE/(パーフルオロブチル)エチレン=46/54/1.4(モル比)、融点:260℃、溶融粘度:1715Pa・s(275℃))の9.0gを入れ、200℃で300回転/分の回転速度の撹拌翼で2時間撹拌した。撹拌を行うと、含フッ素共重合体(A1)と(B1)とイソホロンとが混ざり合い、透明で均一な溶液状態となった。この溶液の相分離温度は150~160℃であった。
東洋精機社製ラボプラストミルに、実施例1で使用した含フッ素共重合体(A1)の4.0gと、含フッ素共重合体(B1)の36.0gを入れ、合わせて40gとなるようにして、300℃で10分間100回転で混合して、含フッ素共重合体(A1)と含フッ素共重合体(B1)の組成物2を得た。組成物2において、含フッ素共重合体(A1)/含フッ素共重合体(B1)=10/90(質量比)であった。得られた組成物2を使用して、試験を行った。溶融破断張力は、13.9mNであった。また、引き取り速度は37.5m/minであった。
井元製作所社製複合型混練押出機を混合撹拌機として使用し、この押出機にイソホロン138g、高分子量の含フッ素共重合体(A2)(ETFE、E/TFE/(パーフルオロブチル)エチレン=40/60/3.3(モル比)、融点:225℃、溶融粘度:2475Pa・s(240℃))の35.6g、低分子量の含フッ素共重合体(B2)(ETFE,E/TFE/(パーフルオロブチル)エチレン=40/60/3.3(モル比)、融点:225℃、溶融粘度:90Pa・s(240℃))の142.4gを入れ、200℃で、100回転/分の回転速度で撹拌軸を回転させ、1時間混合した。混合を行うと、含フッ素共重合体(A2)と含フッ素共重合体(B2)とイソホロンとが混ざり合い、透明で均一な溶液状態となった。溶液において、イソホロン/(含フッ素共重合体(A2)と含フッ素共重合体(B2)の合計量)=43.7/56.3(質量比)であり、含フッ素共重合体(A2)/含フッ素共重合体(B2)=20/80(質量比)であった。
得られたペレット状の含フッ素共重合体混合物D2の10gをアセトンの100g中に室温で1時間浸漬させて、ペレット状の含フッ素共重合体混合物D2に含まれるイソホロンをアセトン中に抽出した。その後、含フッ素共重合体混合物D2をアセトン・イソホロン溶液から分別し、180℃で乾燥させ、含フッ素共重合体(A2)と含フッ素共重合体(B2)の組成物3を得た。得られた組成物3を使用して、試験を行った。溶融破断張力は、6.5mNであった。また、引き取り速度は75.7m/minであった。組成物3を使用して、フィルムの成形を行ったところ、ブツ等の異物を含まないフィルムを得た。
東洋精機社製ラボプラストミルに、含フッ素共重合体(A2)の8.0g、含フッ素共重合体(B2)の32.0gを入れ、合わせて40gとなるようにして、300℃で10分間100回転で混合して、含フッ素共重合体(A2)と含フッ素共重合体(B2)の組成物4を得た。組成物4において、含フッ素共重合体(A2)/含フッ素共重合体(B2)=20/80(質量比)であった。得られた組成物4を使用して、試験を行った。溶融破断張力は、4.7mNであった。また、引き取り速度は22.9m/minであった。
なお、2010年4月16日に出願された日本特許出願2010-094734号の明細書、特許請求の範囲、及び要約書の全内容をここに引用し、本発明の明細書の開示として、取り入れるものである。
Claims (10)
- 融点+15℃での溶融粘度が1500~35000Pa・sであり、テトラフルオロエチレンに基づく繰返し単位とエチレンに基づく繰返し単位とを有する高分子量の含フッ素共重合体(A)と、融点+15℃での溶融粘度が50~3000Pa・sであり、前記含フッ素共重合体(A)の融点+15℃の温度での溶融粘度が前記含フッ素共重合体(A)の前記同温度での溶融粘度の1/5以下であり、前記含フッ素共重合体(A)よりテトラフルオロエチレンに基づく繰返し単位とエチレンに基づく繰返し単位とを有する低分子量の含フッ素共重合体(B)と、前記含フッ素共重合体(A)及び含フッ素共重合体(B)の融点以下の温度で該含フッ素共重合体(A)及び含フッ素共重合体(B)を溶解しうる溶媒(C)とを含む混合物(D)を、含フッ素共重合体(A)及び含フッ素共重合体(B)が該溶媒(C)に溶解する温度以上に加熱して溶液状態とし、次いで溶媒(C)を除去することを特徴とする含フッ素共重合体組成物の製造方法。
- 前記混合物(D)における溶媒(C)の含有量が、混合物(D)中の含フッ素共重合体(A)及び含フッ素共重合体(B)の全量を溶解しうる量以上である請求項1に記載の含フッ素共重合体組成物の製造方法。
- 前記含フッ素共重合体(A)中の(テトラフルオロエチレンに基づく繰返し単位)/(エチレンに基づく繰返し単位)のモル比が、90/10~30/70であり、かつ、含フッ素共重合体(A)の全繰り返し単位に対して、テトラフルオロエチレンに基づく繰返し単位とエチレンに基づく繰返し単位の合計量が80モル%超である含フッ素共重合体である、請求項1又は2に記載の含フッ素共重合体組成物の製造方法。
- 前記含フッ素共重合体(B)中の(テトラフルオロエチレンに基づく繰返し単位)/(エチレンに基づく繰返し単位)のモル比が、90/10~30/70であり、かつ、含フッ素共重合体(B)の全繰り返し単位に対して、テトラフルオロエチレンに基づく繰返し単位とエチレンに基づく繰返し単位の合計量が80モル%超である含フッ素共重合体である、請求項1~3のいずれかに記載の含フッ素共重合体組成物の製造方法。
- 前記溶媒(C)が、含フッ素芳香族化合物、カルボニル基を1個以上有する脂肪族化合物、および、ハイドロフルオロアルキルエーテルからなる群から選ばれる少なくとも一種である、請求項1~4のいずれかに記載の含フッ素共重合体組成物の製造方法。
- 前記含フッ素共重合体組成物中の、含フッ素共重合体(A)/含フッ素共重合体(B)の質量比が、1/1~1/15である、請求項1~5のいずれかに記載の含フッ素共重合体組成物の製造方法。
- 前記混合物(D)の加熱温度が、含フッ素共重合体(A)及び含フッ素共重合体(B)の融点未満の温度である請求項1~6のいずれかに記載の含フッ素共重合体組成物の製造方法。
- 前記含フッ素共重合体(A)と含フッ素共重合体(B)と溶媒(C)とを混合し、混合物(D)を得て、ついで、40℃~200℃の温度で溶解する、請求項1~7のいずれかに記載の含フッ素共重合体組成物の製造方法。
- 請求項1~8のいずれかに記載の製造方法で製造された含フッ素共重合体組成物を成形してなるフッ素樹脂成形体。
- 前記フッ素樹脂成形体がフィルムである請求項9に記載のフッ素樹脂成形体。
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| JP2012510689A JPWO2011129405A1 (ja) | 2010-04-16 | 2011-04-14 | 含フッ素共重合体組成物の製造方法及びフッ素樹脂成形体 |
| CN2011800181887A CN102834451A (zh) | 2010-04-16 | 2011-04-14 | 含氟共聚物组合物的制造方法及氟树脂成形体 |
| EP11768926.5A EP2559730A4 (en) | 2010-04-16 | 2011-04-14 | METHOD FOR PRODUCING A FLUOROUS COPOLYMER COMPOSITION AND FLUORINOUS FLUORO CARBON RESIN PRODUCT |
| KR1020127026208A KR20130072192A (ko) | 2010-04-16 | 2011-04-14 | 함불소 공중합체 조성물의 제조 방법 및 불소 수지 성형체 |
| US13/652,901 US20130041109A1 (en) | 2010-04-16 | 2012-10-16 | Process for producing fluorinated copolymer composition and fluororesin molded product |
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| WO2017018354A1 (ja) * | 2015-07-28 | 2017-02-02 | 旭硝子株式会社 | 含フッ素共重合体組成物および成形体 |
| CN110712348A (zh) * | 2018-07-12 | 2020-01-21 | 大金工业株式会社 | 成型品的制造方法和成型品 |
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| JP6000892B2 (ja) * | 2012-12-13 | 2016-10-05 | 富士フイルム株式会社 | 封止用樹脂組成物、封止用フィルム、配線基板 |
| JPWO2015199193A1 (ja) | 2014-06-27 | 2017-04-20 | 旭硝子株式会社 | 含フッ素共重合体 |
| CN115160469B (zh) | 2017-11-10 | 2024-05-31 | 大金工业株式会社 | 乙烯/四氟乙烯共聚物 |
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| JP2000212365A (ja) | 1999-01-28 | 2000-08-02 | Asahi Glass Co Ltd | 含フッ素共重合体組成物 |
| JP2000334731A (ja) * | 1999-05-28 | 2000-12-05 | Kureha Chem Ind Co Ltd | 樹脂混練物の製造方法 |
| JP2006038962A (ja) * | 2004-07-22 | 2006-02-09 | Nitto Denko Corp | 保護層付き光導波路 |
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| US20060162741A1 (en) * | 2005-01-26 | 2006-07-27 | Cerionx, Inc. | Method and apparatus for cleaning and surface conditioning objects with plasma |
| JP4424246B2 (ja) * | 2004-10-28 | 2010-03-03 | 旭硝子株式会社 | 含フッ素共重合体及びその用途 |
| US9029477B2 (en) * | 2006-03-03 | 2015-05-12 | 3M Innovative Properties Company | Compositions comprising melt-processable thermoplastic fluoropolymers and methods of making the same |
| JP5051517B2 (ja) * | 2006-04-03 | 2012-10-17 | 旭硝子株式会社 | エチレン/テトラフルオロエチレン共重合体組成物 |
| ATE407955T1 (de) * | 2006-04-03 | 2008-09-15 | Asahi Glass Co Ltd | Ethylen-/tetrafluorethylen- copolymerzusammesetzung |
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| JP2000212365A (ja) | 1999-01-28 | 2000-08-02 | Asahi Glass Co Ltd | 含フッ素共重合体組成物 |
| JP2000334731A (ja) * | 1999-05-28 | 2000-12-05 | Kureha Chem Ind Co Ltd | 樹脂混練物の製造方法 |
| JP2006038962A (ja) * | 2004-07-22 | 2006-02-09 | Nitto Denko Corp | 保護層付き光導波路 |
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| WO2017018354A1 (ja) * | 2015-07-28 | 2017-02-02 | 旭硝子株式会社 | 含フッ素共重合体組成物および成形体 |
| CN110712348A (zh) * | 2018-07-12 | 2020-01-21 | 大金工业株式会社 | 成型品的制造方法和成型品 |
| CN110712348B (zh) * | 2018-07-12 | 2022-01-11 | 大金工业株式会社 | 成型品的制造方法和成型品 |
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| JPWO2011129405A1 (ja) | 2013-07-18 |
| TW201141884A (en) | 2011-12-01 |
| EP2559730A4 (en) | 2014-01-15 |
| KR20130072192A (ko) | 2013-07-01 |
| CN102834451A (zh) | 2012-12-19 |
| US20130041109A1 (en) | 2013-02-14 |
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