WO2012043831A1 - 含フッ素重合体の製造方法 - Google Patents
含フッ素重合体の製造方法 Download PDFInfo
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- WO2012043831A1 WO2012043831A1 PCT/JP2011/072663 JP2011072663W WO2012043831A1 WO 2012043831 A1 WO2012043831 A1 WO 2012043831A1 JP 2011072663 W JP2011072663 W JP 2011072663W WO 2012043831 A1 WO2012043831 A1 WO 2012043831A1
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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
- C08F218/00—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 an acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid
- C08F218/02—Esters of monocarboxylic acids
- C08F218/04—Vinyl esters
- C08F218/08—Vinyl acetate
-
- 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
- C08F14/00—Homopolymers and 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
- C08F14/18—Monomers containing fluorine
- C08F14/26—Tetrafluoroethene
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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
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/26—Emulsion polymerisation with the aid of emulsifying agents anionic
-
- 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
-
- 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
- C08F214/186—Monomers containing fluorine with non-fluorinated comonomers
-
- 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
- C08F214/186—Monomers containing fluorine with non-fluorinated comonomers
- C08F214/188—Monomers containing fluorine with non-fluorinated comonomers with non-fluorinated vinyl ethers
-
- 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
-
- 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
- C08F214/267—Tetrafluoroethene with non-fluorinated comonomers with non-fluorinated vinyl ethers
Definitions
- the present invention relates to a method for producing a fluoropolymer using a non-fluorinated compound having surface activity.
- Fluoropolymers have excellent chemical resistance, solvent resistance, heat resistance, and antifouling properties, so as raw materials for various products that take advantage of these properties, the automotive industry, semiconductor industry, chemical industry, It is used in a wide range of industrial fields such as paint.
- fluoropolymers are produced by emulsion polymerization, suspension polymerization or solution polymerization of fluoroolefin.
- a surfactant is used in the emulsion polymerization method.
- the amount of the surfactant used increases, the number of polymer particles generated at the initial stage of the emulsion polymerization increases, and the polymerization rate increases, and the fluorine-containing weight increases. Combined production efficiency is improved.
- a large amount of surfactant is used, there is a tendency to reduce various physical properties such as water resistance of the fluoropolymer from which the surfactant is obtained. Therefore, it has been desired to develop a production method that can be efficiently polymerized in the presence of a small amount of a surfactant and that does not adversely affect various physical properties of the fluoropolymer.
- Patent Documents 2 and 3 a production method using alkyl phosphoric acid or an ester thereof (Patent Documents 2 and 3), a method using a compound in which phosphoric acid, sulfonic acid, carboxylic acid or the like is bonded to a quaternary carbon atom. (Patent Document 4) has been proposed.
- a surfactant containing a linear alkyl group or an alkoxyalkyl group is used for conventional aqueous dispersion polymerization of a monomer containing a fluoroolefin, but compared to ammonium perfluorooctanoate, The polymerization product tends to adhere to the polymerization vessel wall, or the polymerization rate is slow.
- An object of the present invention is to provide a method for producing a fluorinated polymer that uses a specific non-fluorine compound having a surface activity and has little polymerization product adhesion and a high polymerization rate.
- the present invention Formula (1): Wherein R 1 and R 2 are the same or different and both are non-fluorinated saturated hydrocarbon groups having 4 to 12 carbon atoms; M is an alkali metal, ammonium salt or amine salt)
- the present invention relates to a method for producing a fluoropolymer, which comprises subjecting a fluoroolefin to aqueous dispersion polymerization in the presence of (1).
- R 1 and R 2 are the same, and both are preferably non-fluorinated alkyl groups having 4 to 12 carbon atoms.
- Compound (1) is preferably sodium dioctyl sulfosuccinate or sodium didecyl sulfosuccinate.
- aqueous dispersion polymerization of a fluoroolefin, a non-fluorinated vinyl monomer, and a non-fluorinated crosslinkable group-containing monomer it is preferable to perform aqueous dispersion polymerization of a fluoroolefin, a non-fluorinated vinyl monomer, and a non-fluorinated crosslinkable group-containing monomer.
- the fluoroolefin is preferably at least one selected from the group consisting of vinyl fluoride, vinylidene fluoride, tetrafluoroethylene, hexafluoropropylene, chlorotrifluoroethylene and 2,3,3,3-tetrafluoropropene.
- the fluoroolefin is preferably at least one selected from the group consisting of tetrafluoroethylene, hexafluoropropylene, chlorotrifluoroethylene and 2,3,3,3-tetrafluoropropene.
- the non-fluorinated vinyl monomer is preferably at least one selected from the group consisting of olefins, vinyl ethers and vinyl esters.
- the non-fluorinated crosslinkable group-containing monomer is preferably a hydroxyl group-containing vinyl monomer or an unsaturated carboxylic acid.
- the aqueous dispersion polymerization in the production method of the present invention is preferably emulsion polymerization.
- the method for producing the fluoropolymer of the present invention comprises: Formula (1): Wherein R 1 and R 2 are the same or different and both are non-fluorinated saturated hydrocarbon groups having 4 to 12 carbon atoms; M is an alkali metal, ammonium salt or amine salt)
- the present invention relates to a method for producing a fluoropolymer, which comprises subjecting a fluoroolefin to aqueous dispersion polymerization in the presence of (1). That is, the present invention is a method for producing a fluoropolymer, characterized in that a fluoroolefin is polymerized in water in the presence of a specific compound.
- the fluoroolefin polymerized by the production method of the present invention is not particularly limited, and one kind or two or more kinds can be used.
- the fluoroolefin include tetrafluoroethylene (TFE), hexafluoropropylene (HFP), perfluoro (alkyl vinyl ether) (PAVE), Perfluoroolefins such as: chlorotrifluoroethylene (CTFE), vinyl fluoride (VF), vinylidene fluoride (VdF), trifluoroethylene, trifluoropropylene, pentafluoropropylene, tetrafluoropropylene, hexafluoroisobutene, etc. And perfluoroolefin.
- PAVE perfluoro (methyl vinyl ether) (PMVE), perfluoro (ethyl vinyl ether) (PEVE), perfluoro (propyl vinyl ether) (PPVE), 2,3,3,3-tetrafluoropropene, and the like.
- fluoroolefins at least one selected from the group consisting of vinyl fluoride, vinylidene fluoride, tetrafluoroethylene, hexafluoropropylene, chlorotrifluoroethylene, and 2,3,3,3-tetrafluoropropene.
- Fluoroolefin is preferred from the viewpoints of low cost and good copolymerizability, and particularly at least selected from the group consisting of tetrafluoroethylene, hexafluoropropylene, chlorotrifluoroethylene and 2,3,3,3-tetrafluoropropene. It is preferable that it is 1 type from the point which is excellent in stain resistance and a weather resistance.
- a fluoroolefin and a non-fluorinated monomer copolymerizable with the fluoroolefin may be copolymerized.
- the non-fluorinated monomer copolymerizable with the fluoroolefin include a non-fluorinated vinyl monomer and a non-fluorinated crosslinkable group-containing monomer.
- Non-fluorinated vinyl monomers include olefins such as ethylene, propylene, isobutylene and n-butene; vinyl ethers such as ethyl vinyl ether, cyclohexyl vinyl ether and methyl vinyl ether; vinyl acetate, vinyl versatate (Veova 9, Veova 10, manufactured by Shell) ), Vinyl esters such as vinyl benzoate, vinyl pivalate, vinyl laurate, vinyl stearate, vinyl cyclohexylcarboxylate. Of these, vinyl acetate, ethyl vinyl ether, and cyclohexyl vinyl ether are preferable from the viewpoint of improving compatibility with the curing agent, coating film hardness, transparency of the coating film, and film forming property.
- Non-fluorinated crosslinkable group-containing monomers include undecylenic acid, crotonic acid, maleic acid, maleic acid monoester, vinyl acetic acid, cinnamic acid, 3-allyloxypropionic acid, itaconic acid, itaconic acid monoester and the like.
- Macromonomer may be included as a non-fluorinated monomer copolymerizable with the fluoroolefin.
- the macromonomer those having a hydrophilic portion are preferable.
- one having a vinyl ether group at one end is preferable because of excellent copolymerizability with a fluoroolefin.
- this macromonomer may have a crosslinkable functional group such as a hydroxyl group or a carboxyl group at the terminal.
- the composition of the resulting fluorinated copolymer is a fluoroolefin / non-fluorinated vinyl monomer / non-fluorinated crosslinkable group-containing monomer. It is preferably 30 to 60/10 to 69/1 to 30, more preferably 40 to 50/25 to 57/3 to 25 in terms of a monomer (mass% ratio).
- aqueous dispersion polymerization of fluoroolefin is carried out in the presence of compound (1) (surfactant).
- surfactant examples of the aqueous dispersion polymerization include emulsion polymerization and suspension polymerization.
- emulsion polymerization is preferable from the viewpoint of producing a large number of polymer particles having a small particle diameter.
- Compound (1) has the formula (1): Wherein R 1 and R 2 are the same or different and both are non-fluorinated saturated hydrocarbon groups having 4 to 12 carbon atoms; M is an alkali metal, ammonium salt or amine salt) It is.
- An alkali metal salt of a dialkylsulfosuccinic acid contained in the compound represented by the formula (1) is known as an emulsifier for emulsion polymerization.
- an aqueous dispersion of a fluororesin obtained by emulsion polymerization of a monomer containing a fluoroolefin in combination with a nonionic emulsifier and an anionic emulsifier has mechanical stability and It is disclosed that an alkali metal salt of a dialkylsulfosuccinic acid may be added for improving thermal stability.
- alkali metal salts of dialkylsulfosuccinic acid are not used as emulsifiers for the polymerization of fluoroolefins.
- R 1 and R 2 are the same or different and both are non-fluorinated saturated hydrocarbon groups having 4 to 12 carbon atoms. Therefore, so-called reactive emulsifiers containing unsaturated groups are not included in compound (1). It is also different from conventionally known surfactants having a linear hydrocarbon group such as sodium dodecyl sulfate and sodium cetyl sulfate. R 1 and R 2 are each preferably a non-fluorinated alkyl group having 4 to 12 carbon atoms.
- R 1 and R 2 are preferably those having 6 to 10 carbon atoms, more preferably 8 to 10 carbon atoms, from the viewpoint of good surface tension reducing ability and good polymerization rate.
- R 1 and R 2 are preferably the same from the viewpoint of ease of synthesis.
- M is an alkali metal, ammonium salt, or amine salt, and examples thereof include sodium, ammonium salt, and triethylamine salt, and sodium and ammonium salts are particularly preferable.
- M is preferably sodium, potassium, NH 4 , R—NH 3 , R 2 —NH 2 , R 3 —NH (R is a non-fluorinated hydrocarbon group), sodium, NH 4 is more preferred.
- the compound (1) include sodium dioctylsulfosuccinate, sodium didecylsulfosuccinate, sodium dihexylsulfosuccinate, sodium diisobutylsulfosuccinate, sodium diamylsulfosuccinate, ammonium dioctylsulfosuccinate, etc. From the viewpoint of ease and good polymerization rate, sodium dioctyl sulfosuccinate and sodium didecyl sulfosuccinate are preferred.
- the amount of compound (1) used is preferably 10 to 100,000 ppm, more preferably 500 to 50,000 ppm based on the total amount of water. Of these, 2000 to 40000 ppm is more preferable, and 4000 to 30000 ppm is particularly preferable.
- the amount of the compound (1) used is less than 10 ppm, the surface activity tends to decrease and the number of generated particles tends to decrease.
- the compound (1) can be used alone, but the emulsion polymerization proceeds sufficiently stably, but may be used in combination with other surfactants.
- the other surfactant may be a non-fluorine (hydrocarbon) surfactant (excluding the compound of the formula (1)).
- the amount of other surfactants that can be used in combination is, for example, in the case of emulsion polymerization, the total amount with compound (1) is preferably 10 to 100,000 ppm, more preferably 2000 to 50,000 ppm, based on the total amount of water.
- the total amount of the compound (1) and the other surfactant is less than 10 ppm, the surface activity tends to be small and the number of generated fluoropolymer particles tends to be small.
- the polymerization temperature is not particularly limited, and an optimum temperature is adopted according to the kind of the polymerization initiator. However, if it becomes too high, the monomer density in the gas phase portion may easily decrease or a polymer branching reaction may occur, and the desired copolymer may not be obtained.
- the temperature is preferably 40 to 120 ° C, more preferably 50 to 100 ° C.
- the monomer may be supplied continuously or sequentially.
- oil-soluble peroxides can also be used. These typical oil-soluble initiators such as diisopropyl peroxydicarbonate (IPP) and di-n-propyl peroxydicarbonate (NPP) These peroxycarbonates have a risk of explosion and the like, are expensive, and have a problem that scales easily adhere to the wall of the polymerization tank during the polymerization reaction. In order to further reduce the compression set of the fluoropolymer, it is preferable to use a water-soluble radical polymerization initiator.
- IPP isopropyl peroxydicarbonate
- NPP di-n-propyl peroxydicarbonate
- water-soluble radical polymerization initiator In order to further reduce the compression set of the fluoropolymer, it is preferable to use a water-soluble radical polymerization initiator.
- water-soluble radical polymerization initiator examples include persulfuric acid, perboric acid, perchloric acid, perphosphoric acid, ammonium percarbonate, potassium salt, sodium salt, and the like. Particularly, ammonium persulfate and potassium persulfate are used. preferable.
- the addition amount of the polymerization initiator is not particularly limited, but it is added all at once in the initial stage of polymerization, sequentially or continuously, such that the polymerization rate is not significantly reduced (for example, several ppm to water concentration). do it.
- the upper limit is a range in which the heat of polymerization reaction can be removed from the surface of the apparatus.
- a molecular weight regulator or the like may be further added.
- the molecular weight modifier may be added all at once in the initial stage, or may be added continuously or dividedly.
- the molecular weight regulator examples include esters such as dimethyl malonate, diethyl malonate, methyl acetate, ethyl acetate, butyl acetate, dimethyl succinate, isopentane, isopropanol, acetone, various mercaptans, carbon tetrachloride, cyclohexane, mono Examples thereof include iodomethane, 1-iodomethane, 1-iodopropane, isopropyl iodide, diiodomethane, 1,2-diiodomethane, 1,3-diiodopropane and the like.
- a buffering agent or the like may be added as appropriate, but the amount is preferably used within a range not impairing the effects of the present invention.
- the polymerization pressure may be appropriately selected within the range of 0.1 to 10 MPa, and further 0.2 to 8 MPa. Within this range, the pressure may be low (0.1 to 1 MPa) or high (1 to 10 MPa).
- the stirring means for example, an anchor blade, a turbine blade, an inclined blade, or the like can be used. However, stirring with a large blade called a full zone or max blend is preferable from the viewpoint of good monomer diffusion and polymer dispersion stability.
- the stirring device may be a horizontal stirring device or a vertical stirring device.
- the present invention is characterized in that a specific compound is used as a surfactant when a fluoroolefin dispersion is produced by emulsion polymerization of a fluoroolefin. For this reason, it can suppress that a polymerization product adheres to a polymerization tank wall. In addition, since the polymerization rate can be increased, the fluoropolymer dispersion can be produced in a short time.
- the adhesion of the polymerization product is small and the polymerization rate can be increased.
- Example 1 In a 0.5 L stainless steel autoclave, 250 g of pure water, 0.55 g of sodium carbonate, Neocor P (sodium dioctylsulfosuccinate: 75.3% by mass of isopropyl alcohol solution: manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) (2.05 g with respect to polymerization water of 6000 ppm), 40.0 g of cyclohexyl vinyl ether (CHVE), 2.5 g of undecylenic acid (UDA), and nitrogen. After substitution, 9 g of tetrafluoroethylene (TFE) was added, and the temperature in the tank was raised to 60 ° C. At this time, the pressure in the tank was 0.75 MPa.
- Neocor P sodium dioctylsulfosuccinate: 75.3% by mass of isopropyl alcohol solution: manufactured by Daiichi Kogyo Seiyaku Co., Ltd.
- CHVE cyclohexy
- the solenoid valve When TFE is consumed and the inside of the tank reaches 0.725 MPa, the solenoid valve is automatically opened and TFE is supplied, and when 0.75 MPa is reached, the solenoid valve is automatically closed and the supply of TFE is stopped. And controlled the pressure. The time from when the solenoid valve is opened until it is opened next is defined as one cycle.
- Example 2 In a 0.5 L stainless steel autoclave, 250 g of pure water, 0.55 g of sodium carbonate, 9.96 g of neocol P (sodium dioctylsulfosuccinate) (30000 ppm of polymerization water), CHVE 40.0 g, and 2.5 g of UDA were added, and the atmosphere was replaced with nitrogen. And the temperature in the tank was raised to 60 ° C. At this time, the pressure in the tank was 0.75 MPa. While stirring, 5.0 g of a 10 mass% aqueous solution of APS was added to initiate the reaction. During the reaction, TFE was continuously supplied using a solenoid valve. The stirring speed at the start of the reaction was 260 rpm. The pressure at the time of polymerization was adjusted to 0.750 to 0.725 MPa automatically using a solenoid valve in the same manner as in Example 1.
- neocol P sodium dioctylsulfosuccinate
- the stirring speed was increased to 600 rpm 1.5 hours after the start of the reaction. Since 6.75 hours after the start of the reaction, the cycle time was increased to 14 minutes, the supply of TFE was stopped and the reaction was terminated. Thereafter, the inside of the tank was returned to normal temperature and pressure, and the polymerization was stopped to obtain 332.2 g of TFE / CHVE / UDA copolymer emulsion (solid content concentration 19.8% by mass). The polymerization rate was 20.2 g / h / L. Adhesion and sedimentation did not occur in the emulsion after polymerization.
- Example 3 In a 0.5 L stainless steel autoclave, 250 g of pure water, 0.55 g of sodium carbonate, sodium didecyl sulfosuccinate: 60.1 mass% isopropyl alcohol solution 2.57 g (with respect to 6000 ppm of polymerization water), CHVE 40.0 g, and UDA 2.5 g were added, and the atmosphere was replaced with nitrogen, TFE 9 g was added, and the temperature in the tank was raised to 60 ° C. At this time, the pressure in the tank was 0.75 MPa. While stirring, 5.0 g of a 10 mass% aqueous solution of APS was added to initiate the reaction. During the reaction, TFE was continuously supplied using a solenoid valve. The stirring speed at the start of the reaction was 260 rpm. The pressure at the time of polymerization was adjusted to 0.750 to 0.725 MPa automatically using a solenoid valve in the same manner as in Example 1.
- the stirring speed was increased to 600 rpm 1.0 hour after the start of the reaction. After 7.3 hours from the start of the reaction, the cycle time was increased to 7 minutes, so the supply of TFE was stopped and the reaction was terminated. Thereafter, the inside of the tank was returned to normal temperature and normal pressure to stop the polymerization, and 318.5 g of TFE / CHVE / UDA copolymer emulsion (solid content concentration: 17.2% by mass) was obtained. The polymerization rate was 14.6 g / h / L. Adhesion and sedimentation did not occur in the emulsion after polymerization.
- Example 4 Put 1000g of pure water, 1.62g of Neocol P (sodium dioctylsulfosuccinate) (2620g of polymerization water) and 23.2g of vinyl acetate into a 3L stainless steel autoclave, and replace with nitrogen, add 72g of TFE, and raise the temperature to 60 ° C. Warm up. At this time, the pressure in the tank was 0.80 MPa. Under stirring, 10 g of a 4.8% by mass aqueous solution of APS was added to initiate the reaction. The stirring speed at the start of the reaction was 400 rpm. The pressure at the time of polymerization was adjusted to 0.775 to 0.800 MPa automatically using a solenoid valve in the same manner as in Example 1. During the reaction, TFE was continuously supplied using a solenoid valve, and a mixed solution of vinyl acetate and UDA (218.4 g of vinyl acetate, 10.6 g of UDA) was continuously supplied by a liquid charging pump.
- Neocol P sodium diocty
- Example 5 Put 1000g of pure water, 0.1375g of sodium carbonate, 1.62g of neocol P (sodium dioctylsulfosuccinate) (2620g of polymerized water) and 23.2g of vinyl acetate into a 3L stainless steel autoclave, purge with nitrogen, add 71g of TFE, The inside was heated to 60 ° C. At this time, the pressure in the tank was 0.80 MPa. Under stirring, 10 g of a 4.8% by mass aqueous solution of APS was added to initiate the reaction. The stirring speed at the start of the reaction was 400 rpm. The pressure at the time of polymerization was adjusted to 0.775 to 0.800 MPa automatically using a solenoid valve in the same manner as in Example 1.
- TFE was continuously supplied using a solenoid valve, and a mixed solution of vinyl acetate and 4-hydroxybutyl vinyl ether (HBVE) (109.5 g of vinyl acetate, 25.8 g of HBVE) was continuously supplied by a liquid charging pump.
- HBVE 4-hydroxybutyl vinyl ether
- the temperature in the tank was raised to 70 ° C. 5.75 hours after the start of the reaction. After 8.67 hours and 11.5 hours from the start of the reaction, 10 g of a 4.8% by mass aqueous solution of APS was added. After 13.7 hours from the start of the reaction, the supply of TFE and the mixed solution was stopped to complete the reaction. Thereafter, the inside of the tank was returned to room temperature and normal pressure to stop the polymerization, and 1385 g of TFE / vinyl acetate / HBVE copolymer emulsion (solid content concentration: 25% by mass) was obtained. Adhesion and sedimentation did not occur in the emulsion after polymerization.
- Example 6 Put 1000g of pure water, 0.1375g of sodium carbonate, 1.62g of neocol P (sodium dioctylsulfosuccinate) (2620g of polymerized water) and 23.2g of vinyl acetate into a 3L stainless steel autoclave, purge with nitrogen, add 71g of TFE, The inside was heated to 70 ° C. At this time, the pressure in the tank was 0.80 MPa. Under stirring, 10 g of a 4.8% by mass aqueous solution of APS was added to initiate the reaction. The stirring speed at the start of the reaction was 400 rpm. The pressure at the time of polymerization was adjusted to 0.775 to 0.800 MPa automatically using a solenoid valve in the same manner as in Example 1.
- TFE was continuously supplied using a solenoid valve, and a mixed solution of vinyl acetate, UDA, and HBVE (vinyl acetate 236.6 g, UDA 6.4 g, HBVE 51.1 g) was continuously supplied with a liquid charging pump.
- Example 7 Put 1000g of pure water, 23.2g of vinyl acetate, 1.62g of neocol P (sodium dioctyl sulfosuccinate) (1620ppm of polymerization water) into a 3L stainless steel autoclave, purge with nitrogen, add 37g of TFE, and raise the temperature to 80 ° C. Warm up. Thereafter, 30 g of TFE was added. At this time, the pressure in the tank was 0.809 MPa. Under stirring, 22 g of a 1% by mass aqueous solution of APS was added to initiate the reaction. Addition of vinyl acetate was started at the start of the reaction, and 283 g of vinyl acetate was added over 6 hours. During the reaction, TFE was continuously supplied using a solenoid valve. The stirring speed was 500 rpm.
- neocol P sodium dioctyl sulfosuccinate
- the solenoid valve When TFE is consumed and the inside of the tank reaches 0.800 MPa, the solenoid valve is automatically opened and TFE is supplied, and when 0.775 MPa is reached, the solenoid valve is automatically closed and the supply of TFE is stopped. And controlled the pressure.
- Comparative Example 1 In a 0.5 L stainless steel autoclave, 250 g of pure water, 0.55 g of sodium carbonate, 1.54 g of sodium dodecyl sulfate (C 12 H 25 OSO 3 Na) (with respect to 6000 ppm of polymerization water), 40.0 g of CHVE, 2.5 g of UDA, and nitrogen After replacement, 9 g of TFE was added, and the temperature in the tank was raised to 60 ° C. At this time, the pressure in the tank was 0.875 MPa. While stirring, 5.0 g of a 10 mass% aqueous solution of APS was added to initiate the reaction. During the reaction, TFE was continuously supplied using a solenoid valve. The stirring speed at the start of the reaction was 260 rpm. The pressure at the time of polymerization was adjusted to 0.875 to 0.850 MPa automatically using a solenoid valve in the same manner as in Example 1.
- the stirring speed was increased to 600 rpm 1.0 hour after the start of the reaction. 5.0 hours after the start of the reaction, the cycle time was increased to 20 minutes, so the supply of TFE was stopped and the reaction was terminated. Thereafter, the inside of the tank was returned to room temperature and normal pressure to stop the polymerization, and 302.4 g of TFE / CHVE / UDA copolymer emulsion (solid content concentration 17.6% by mass) was obtained.
- the polymerization rate was 23.6 g / h / L. A small amount of suspended matter was generated in the emulsion after polymerization, and a small amount of deposit was generated in the reaction vessel.
- Comparative Example 2 In a 0.5 L stainless steel autoclave, 250 g of pure water, 0.55 g of sodium carbonate, 1.54 g of sodium cetyl sulfate (C 16 H 33 OSO 3 Na) (with respect to 6000 ppm of polymerization water), CHVE 40.0 g, and UDA 2.5 g are added, and nitrogen is added. After replacement, 9 g of TFE was added, and the temperature in the tank was raised to 60 ° C. At this time, the pressure in the tank was 0.75 MPa. While stirring, 5.0 g of a 10 mass% aqueous solution of APS was added to initiate the reaction. During the reaction, TFE was continuously supplied using a solenoid valve. The stirring speed at the start of the reaction was 260 rpm. The pressure at the time of polymerization was adjusted to 0.750 to 0.725 MPa automatically using a solenoid valve in the same manner as in Example 1.
- the stirring speed was increased to 600 rpm 1.0 hour after the start of the reaction. After 5.6 hours from the start of the reaction, the cycle time was increased to 20 minutes, so the supply of TFE was stopped and the reaction was terminated. Thereafter, the inside of the tank was returned to room temperature and normal pressure to stop the polymerization, and 314.4 g of TFE / CHVE / UDA copolymer emulsion (solid content concentration 16.6% by mass) was obtained. The polymerization rate was 16.7 g / h / L. A small amount of suspended matter was generated in the emulsion after polymerization, and a small amount of deposit was generated in the reaction vessel.
- Comparative Example 3 In a 0.5 L stainless steel autoclave, 250 g of pure water, 0.55 g of sodium carbonate, sodium lauryl sulfosuccinate: A 25 mass% aqueous solution of 6.17 g (with respect to polymerization water of 6000 ppm), CHVE of 40.0 g, and UDA of 2.5 g were added, the atmosphere was replaced with nitrogen, TFE of 9 g was added, and the temperature in the tank was raised to 60 ° C. At this time, the pressure in the tank was 0.75 MPa. While stirring, 5.0 g of a 10 mass% aqueous solution of APS was added to initiate the reaction. During the reaction, TFE was continuously supplied using a solenoid valve. The stirring speed at the start of the reaction was 260 rpm. The pressure at the time of polymerization was adjusted to 0.750 to 0.725 MPa automatically using a solenoid valve in the same manner as in Example 1.
- the stirring speed was increased to 600 rpm 1.0 hour after the start of the reaction. After 5.6 hours from the start of the reaction, the cycle time was increased to 20 minutes, so the supply of TFE was stopped and the reaction was terminated. Thereafter, the inside of the tank was returned to room temperature and normal pressure to stop the polymerization, and 314.4 g of TFE / CHVE / UDA copolymer emulsion (solid content concentration 16.6% by mass) was obtained. The polymerization rate was 8.5 g / h / L. A small amount of suspended matter was generated in the emulsion after polymerization, and a small amount of deposit was generated in the reaction vessel.
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Abstract
Description
式(1):
式(1)において、R1およびR2が同じであり、いずれも炭素数4~12の非フッ素化アルキル基であることが好ましい。
化合物(1)が、ジオクチルスルホコハク酸ナトリウムまたはジデシルスルホコハク酸ナトリウムであることが好ましい。
フルオロオレフィンは、テトラフルオロエチレン、ヘキサフルオロプロピレン、クロロトリフルオロエチレンおよび2,3,3,3-テトラフルオロプロペンよりなる群から選ばれる少なくとも1種であることが好ましい。
非フッ素化架橋性基含有単量体としては、水酸基含有ビニル単量体または不飽和カルボン酸が好ましい。
式(1):
すなわち、本発明は、特定の化合物の存在下にフルオロオレフィンを水中で重合することを特徴とする含フッ素重合体の製造方法である。
国際公開第2002/010237号パンフレットには、フルオロオレフィンを含む単量体をノニオン性乳化剤とアニオン性乳化剤を併用して乳化重合して得られたフッ素樹脂の水性分散液に、機械的安定性や熱的安定性の改善のためにジアルキルスルホコハク酸のアルカリ金属塩を添加してもよいことが開示されている。しかし、ここではジアルキルスルホコハク酸のアルカリ金属塩は、フルオロオレフィンの重合用の乳化剤としては用いられていない。
R1及びR2は、いずれも炭素数4~12の非フッ素化アルキル基であることが好ましい。
Mはアルカリ金属、アンモニウム塩、アミン塩であり、ナトリウム、アンモニウム塩、トリエチルアミン塩が例示できるが、ナトリウム、アンモニウム塩が特に好ましい。
具体的には、Mは、ナトリウム、カリウム、NH4、R-NH3、R2-NH2、R3-NH(Rは非フッ素化炭化水素基である)であることが好ましく、ナトリウム、NH4がより好ましい。
0.5Lステンレス製オートクレーブに純水250g、炭酸ナトリウム0.55g、ネオコールP(ジオクチルスルホコハク酸ナトリウム:
重合速度:1時間あたり、重合槽1Lあたりのポリマー生成量とする。単位はg/h/L。
0.5Lステンレス製オートクレーブに純水250g、炭酸ナトリウム0.55g、ネオコールP(ジオクチルスルホコハク酸ナトリウム)9.96g(対重合水30000ppm)、CHVE40.0g、UDA2.5gを入れ、窒素置換し、TFE9gを加え、槽内を60℃まで昇温した。この時槽内の圧力は0.75MPaとなった。これに撹拌下、APSの10質量%水溶液5.0gを加え、反応を開始した。反応中は電磁弁を用いてTFEを連続供給した。反応開始時の撹拌速度は260rpmであった。重合時の圧力は、実施例1と同様にして電磁弁を用いて自動的に0.750~0.725MPaになるように調節した。
0.5Lステンレス製オートクレーブに純水250g、炭酸ナトリウム0.55g、ジデシルスルホコハク酸ナトリウム:
3Lステンレス製オートクレーブに純水1000g、ネオコールP(ジオクチルスルホコハク酸ナトリウム)1.62g(対重合水1620ppm)、酢酸ビニル23.2gを入れ、窒素置換し、TFE72gを加え、槽内を60℃まで昇温した。この時槽内の圧力は0.80MPaとなった。これに撹拌下、APSの4.8質量%水溶液10gを加え、反応を開始した。
反応開始時の撹拌速度は400rpmであった。重合時の圧力は、実施例1と同様にして電磁弁を用いて自動的に0.775~0.800MPaになるように調節した。反応中は電磁弁を用いてTFEを連続供給し、酢酸ビニルとUDAの混合溶液(酢酸ビニル218.4g、UDA10.6g)を液仕込みポンプで連続供給した。
3Lステンレス製オートクレーブに純水1000g、炭酸ナトリウム0.1375g、ネオコールP(ジオクチルスルホコハク酸ナトリウム)1.62g(対重合水1620ppm)、酢酸ビニル23.2gを入れ、窒素置換し、TFE71gを加え、槽内を60℃まで昇温した。この時槽内の圧力は0.80MPaとなった。これに撹拌下、APSの4.8質量%水溶液10gを加え、反応を開始した。
反応開始時の撹拌速度は400rpmであった。重合時の圧力は、実施例1と同様にして電磁弁を用いて自動的に0.775~0.800MPaになるように調節した。反応中は電磁弁を用いてTFEを連続供給し、酢酸ビニルと4-ヒドロキシブチルビニルエーテル(HBVE)の混合溶液(酢酸ビニル109.5g,HBVE25.8g)を液仕込みポンプで連続供給した。
3Lステンレス製オートクレーブに純水1000g、炭酸ナトリウム0.1375g、ネオコールP(ジオクチルスルホコハク酸ナトリウム)1.62g(対重合水1620ppm)、酢酸ビニル23.2gを入れ、窒素置換し、TFE71gを加え、槽内を70℃まで昇温した。この時槽内の圧力は0.80MPaとなった。これに撹拌下、APSの4.8質量%水溶液10gを加え、反応を開始した。
反応開始時の撹拌速度は400rpmであった。重合時の圧力は、実施例1と同様にして電磁弁を用いて自動的に0.775~0.800MPaになるように調節した。反応中は電磁弁を用いてTFEを連続供給し、酢酸ビニルとUDAとHBVEの混合溶液(酢酸ビニル236.6g,UDA6.4g,HBVE51.1g)を液仕込みポンプで連続供給した。
3Lステンレス製オートクレーブに純水1000g、酢酸ビニル23.2g、ネオコールP(ジオクチルスルホコハク酸ナトリウム)1.62g(対重合水1620ppm)を入れ、窒素置換し、TFE37gを加え、槽内を80℃まで昇温した。その後、TFEを30g加えた。このとき槽内の圧力は0.809MPaとなった。これに撹拌下、APSの1質量%水溶液22gを加え、反応を開始した。反応開始時に酢酸ビニルの追加を開始し、6時間かけて283gの酢酸ビニルを追加した。反応中は電磁弁を用いてTFEを連続供給した。撹拌速度は500rpmであった。
0.5Lステンレス製オートクレーブに純水250g、炭酸ナトリウム0.55g、ドデシル硫酸ナトリウム(C12H25OSO3Na)1.54g(対重合水6000ppm)、CHVE40.0g、UDA2.5gを入れ、窒素置換し、TFE9gを加え、槽内を60℃まで昇温した。この時槽内の圧力は0.875MPaとなった。これに撹拌下、APSの10質量%水溶液5.0gを加え、反応を開始した。反応中は電磁弁を用いてTFEを連続供給した。反応開始時の撹拌速度は260rpmであった。重合時の圧力は、実施例1と同様にして電磁弁を用いて自動的に0.875~0.850MPaになるように調節した。
0.5Lステンレス製オートクレーブに純水250g、炭酸ナトリウム0.55g、セチル硫酸ナトリウム(C16H33OSO3Na)1.54g(対重合水6000ppm)、CHVE40.0g、UDA2.5gを入れ、窒素置換し、TFE9gを加え、槽内を60℃まで昇温した。この時槽内の圧力は0.75MPaとなった。これに撹拌下、APSの10質量%水溶液5.0gを加え、反応を開始した。反応中は電磁弁を用いてTFEを連続供給した。反応開始時の撹拌速度は260rpmであった。重合時の圧力は、実施例1と同様にして電磁弁を用いて自動的に0.750~0.725MPaになるように調節した。
0.5Lステンレス製オートクレーブに純水250g、炭酸ナトリウム0.55g、ラウリルスルホコハク酸ナトリウム:
Claims (9)
- 式(1)において、R1およびR2が同じであり、いずれも炭素数4~12の非フッ素化アルキル基である請求項1記載の含フッ素重合体の製造方法。
- 化合物(1)が、ジオクチルスルホコハク酸ナトリウムまたはジデシルスルホコハク酸ナトリウムである請求項1または2記載の含フッ素重合体の製造方法。
- フルオロオレフィン、非フッ素化ビニル単量体および非フッ素化架橋性基含有単量体を水性分散重合する請求項1~3のいずれか1項に記載の含フッ素重合体の製造方法。
- フルオロオレフィンが、フッ化ビニル、フッ化ビニリデン、テトラフルオロエチレン、ヘキサフルオロプロピレン、クロロトリフルオロエチレンおよび2,3,3,3-テトラフルオロプロペンよりなる群から選ばれる少なくとも1種である請求項1~4のいずれか1項に記載の含フッ素重合体の製造方法。
- フルオロオレフィンが、テトラフルオロエチレン、ヘキサフルオロプロピレン、クロロトリフルオロエチレンおよび2,3,3,3-テトラフルオロプロペンよりなる群から選ばれる少なくとも1種である請求項1~4のいずれか1項に記載の含フッ素重合体の製造方法。
- 非フッ素化ビニル単量体が、オレフィン、ビニルエーテルおよびビニルエステルよりなる群から選ばれる少なくとも1種である請求項4~6のいずれか1項に記載の含フッ素重合体の製造方法。
- 非フッ素化架橋性基含有単量体が、水酸基含有ビニル単量体または不飽和カルボン酸である請求項4~7のいずれか1項に記載の含フッ素重合体の製造方法。
- 水性分散重合が、乳化重合である請求項1~8のいずれかに記載の含フッ素重合体の製造方法。
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JP2012092285A (ja) | 2012-05-17 |
US20130203950A1 (en) | 2013-08-08 |
JP5229370B2 (ja) | 2013-07-03 |
EP2623519B1 (en) | 2017-11-01 |
EP2623519A4 (en) | 2015-12-30 |
EP2623519A1 (en) | 2013-08-07 |
JP5742384B2 (ja) | 2015-07-01 |
US9567413B2 (en) | 2017-02-14 |
JP2012092333A (ja) | 2012-05-17 |
CN103124746B (zh) | 2015-08-26 |
CN103124746A (zh) | 2013-05-29 |
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