WO2015174545A1 - 不燃シートおよびその製造方法 - Google Patents
不燃シートおよびその製造方法 Download PDFInfo
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- WO2015174545A1 WO2015174545A1 PCT/JP2015/064238 JP2015064238W WO2015174545A1 WO 2015174545 A1 WO2015174545 A1 WO 2015174545A1 JP 2015064238 W JP2015064238 W JP 2015064238W WO 2015174545 A1 WO2015174545 A1 WO 2015174545A1
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- fluororesin
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 47
- 229920000642 polymer Polymers 0.000 claims abstract description 145
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- 239000002759 woven fabric Substances 0.000 claims abstract description 26
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- 229920006243 acrylic copolymer Polymers 0.000 claims abstract description 10
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims abstract description 9
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- 239000011347 resin Substances 0.000 claims description 40
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- 229910052731 fluorine Inorganic materials 0.000 description 87
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- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 85
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- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 64
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- 238000006460 hydrolysis reaction Methods 0.000 description 33
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 32
- 239000004811 fluoropolymer Substances 0.000 description 32
- 230000007062 hydrolysis Effects 0.000 description 32
- 238000000034 method Methods 0.000 description 32
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- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 17
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 16
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- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 7
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- 239000011734 sodium Substances 0.000 description 7
- 229910052708 sodium Inorganic materials 0.000 description 7
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 6
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
- HGINCPLSRVDWNT-UHFFFAOYSA-N Acrolein Chemical compound C=CC=O HGINCPLSRVDWNT-UHFFFAOYSA-N 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 6
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 6
- 238000005481 NMR spectroscopy Methods 0.000 description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
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- YAQXJPBLJAFSFJ-UHFFFAOYSA-N acetyl acetate;prop-2-enoic acid Chemical compound OC(=O)C=C.CC(=O)OC(C)=O YAQXJPBLJAFSFJ-UHFFFAOYSA-N 0.000 description 5
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- OWCNWICUDXNCTI-UHFFFAOYSA-N azanium;2,2,3,3,4,4,5,5,6,6,6-undecafluorohexanoate Chemical compound N.OC(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F OWCNWICUDXNCTI-UHFFFAOYSA-N 0.000 description 3
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- D—TEXTILES; PAPER
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- D—TEXTILES; PAPER
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- D06M15/643—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/02—Composition of the impregnated, bonded or embedded layer
- B32B2260/021—Fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/04—Impregnation, embedding, or binder material
- B32B2260/046—Synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
- B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
- D06M2200/30—Flame or heat resistance, fire retardancy properties
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2209/00—Properties of the materials
- D06N2209/06—Properties of the materials having thermal properties
- D06N2209/067—Flame resistant, fire resistant
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0006—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using woven fabrics
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
- D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06N3/042—Acrylic polymers
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06N3/047—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds with fluoropolymers
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- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/128—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with silicon polymers
Definitions
- the present invention relates to a non-combustible sheet, and more particularly to a technique using a fluororesin suitable for use as a film material for buildings that can be used as a tent film when a large space building is constructed.
- a fluorine-containing resin such as polytetrafluoroethylene resin (hereinafter also referred to as PTFE) is used for a heat-resistant woven fabric made of glass fiber.
- PTFE polytetrafluoroethylene resin
- a film structure material (sheet material) formed by impregnation several times and repeated firing is known (Patent Document 1).
- the sheet material using PTFE requires a firing step, and there has been a demand for reducing this manufacturing process. Since a resin layer made of only a fluororesin such as PTFE has a hard resin layer and lacks flexibility, there is a demand for flexibility from the viewpoint of suitability for manufacturing processing. At the same time, there has been a demand to further improve the weather resistance, heat shielding properties, hydrophilicity, nonflammability, chemical resistance, flexibility, and handling properties.
- the present invention has been made in view of the above circumstances, and intends to achieve the following object. 1. Maintain or improve weather resistance, heat insulation, hydrophilicity, nonflammability, chemical resistance, flexibility and handling. 2. Reduce manufacturing costs.
- the incombustible sheet of the present invention has a woven fabric surface made of incombustible fibers.
- the above problem has been solved by forming a resin layer containing at least a first fluororesin having a vinylidene fluoride copolymer and an acrylic copolymer. It is preferable that the resin layer of the present invention includes a second fluororesin having a vinylidene fluoride polymer, a siloxane polymer, and a cross-linked acrylic polymer.
- the first fluororesin may contain titanium oxide.
- the thickness is more preferably about 100 to 200 ⁇ m.
- a woven fabric composed of non-combustible fibers is used.
- a resin layer can be formed by impregnating a resin containing at least a first fluororesin having a vinylidene fluoride copolymer, an acrylic copolymer, and water. It is preferable that the resin of the present invention includes a second fluororesin having a vinylidene fluoride polymer, a siloxane polymer, and a cross-linked acrylic polymer.
- the first fluororesin may contain titanium oxide.
- means having a thickness of about 100 to 200 ⁇ m can be employed.
- the incombustible sheet of the present invention has a woven fabric surface made of incombustible fibers.
- the first fluororesin can be Zeffle (Daikin Industrial Co., Ltd., trademark), and the second fluororesin can be Schiff Clear (SIFCLEAR: JSR Corp., trademark). be able to.
- the blending ratio of the first fluororesin and the second fluororesin is 0 to 1, that is, the blending is performed in such a ratio that the first fluororesin or the second fluororesin is 0.
- the fluororesin contained includes only the first fluororesin or only the second fluororesin. Further, the first fluororesin may not contain titanium oxide.
- the thickness is about 100 to 200 ⁇ m, it is possible to maintain flexibility and improve handling properties and surface printing goodness.
- a woven fabric composed of non-combustible fibers is used.
- the number of steps involved in the manufacturing can be reduced, the manufacturing time can be shortened, the cost required for the manufacturing apparatus can be reduced, and the manufacturing cost and the required energy can be greatly reduced. Furthermore, weather resistance, heat shielding properties, hydrophilicity, nonflammability, chemical resistance, flexibility, handling properties, and surface printing goodness can be improved.
- the above fluororesin is impregnated while continuously feeding a long woven fabric made of incombustible fibers with tension, and then scraped on both sides with a doctor blade and dried. Incombustible sheets can be manufactured.
- nonflammability is ensured, manufacturing by coating is possible, manufacturing can be performed without firing, the number of manufacturing steps is reduced, manufacturing time is shortened, and manufacturing is performed.
- Reduces equipment costs significantly reduces manufacturing costs and energy requirements, and improves weatherability, thermal insulation, hydrophilicity, nonflammability, chemical resistance, flexibility, handling, and surface printability The effect that it is possible can be produced.
- FIG. 1 is a cross-sectional view showing a non-combustible sheet according to the present embodiment.
- reference numeral 1 denotes a non-combustible sheet.
- the incombustible sheet 1 in the present embodiment is, for example, a plain weave, a noncombustible fiber woven fabric 2 composed of warp yarns 2 a and weft yarns 2 b, and a resin formed on the front and back of the incombustible fiber woven fabric 2. It is composed of layer 3.
- the incombustible fiber woven fabric 2 can be made to have a thickness of about 0.1 that can be applied to architectural membrane materials such as glass fiber, aramid fiber, carbon fiber, metal fiber, etc., and the strength and weather resistance of the incombustible sheet 1 itself. It is necessary to maintain the properties, heat shielding properties, hydrophilic properties, nonflammability, chemical resistance, flexibility, handling properties, and surface printing goodness. In the present embodiment, it is preferably a glass fiber.
- the resin layer 3 is made of a fluorine-containing resin, is made of a first fluorine resin and a second fluorine resin, as will be described later, and is formed by impregnating a non-combustible fiber woven fabric (glass fiber woven fabric) 2.
- the non-combustible sheet 1 on which the resin layer 3 is formed is set to have a thickness of about 100 to 200 ⁇ m.
- FIG. 2 is a schematic diagram showing an apparatus for manufacturing a non-combustible sheet according to the present embodiment.
- reference numeral 10 denotes a non-combustible sheet manufacturing apparatus.
- the non-combustible sheet manufacturing apparatus 10 includes a feed roll 11 that sends out a non-combustible fiber woven fabric 12 that is a base material, and an impregnation tank 114 that is filled with a fluororesin 13 on the downstream side of the feed roll 11.
- the non-combustible fiber woven fabric 2 arranged and wound around the delivery roll 11 is supplied via the tension roll 15 and sent to the roll 15b side arranged in the fluororesin 13 of the impregnation tank 14 via the roll 15a.
- a fluororesin 13 is applied to the incombustible fiber woven fabric 2.
- a pair of doctor blades 16 is disposed above the impregnation tank 14 and the excess fluororesin 13 is scraped off.
- a drying unit 17 capable of setting a processing temperature for removing excess moisture.
- the drying unit 17 can be heated at a temperature of about 150 ° C., and the resin layer 3 and the glass fiber woven fabric 2 are integrated. Downstream of the drying unit 17 are provided rolls 15c, 15d, and 15e that send the noncombustible sheet 18 that has been dried, and a winding roll 19 that winds the noncombustible sheet 18 that has passed through these rolls.
- the noncombustible sheet 1 in the present embodiment is manufactured as follows.
- the glass fiber woven fabric 12 wound around the feed roll 11 is supplied via the tension roll 15 and sent to the roll 15b arranged in the resin liquid 13 of the impregnation tank 14, and the glass fiber woven fabric 12 is supplied with fluorine. Resin 13 is applied.
- the excess fluororesin liquid 13 applied to the surface of the glass fiber woven fabric 12 is scraped off by a pair of doctor blades 16.
- the glass fiber woven fabric 12 coated with the fluororesin 13 is sent to the drying unit 17, and the coated resin is dried at a temperature of about 150 ° C. to evaporate the moisture, and the incombustible sheet 1 is removed without firing.
- the glass fiber woven fabric 12 wound around the feed roll 11 is supplied via the tension roll 15 and sent to the roll 15b arranged in the resin liquid 13 of the impregnation tank 14, and the glass fiber woven fabric 12 is supplied with fluorine. Resin 13 is applied.
- the non-breathable non-combustible sheet 1 formed by impregnating the resin layer 3 on both sides as described above is sufficiently flexible while maintaining the same strength and wear resistance as compared with the conventional one. And excellent weather resistance.
- the application amount can be controlled by the tension applied to the glass fiber woven fabric 12 by the tension roll 15, the viscosity of the fluororesin liquid 13, and the angle of the doctor blade 16.
- the fluororesin 13 to be the resin layer 3 is adjusted as follows.
- As the first fluororesin one having a vinylidene fluoride copolymer, an acrylic copolymer, and titanium oxide is prepared. At this time, water or hydrous silicic acid may be contained.
- As the second fluororesin one having a vinylidene fluoride polymer, a siloxane polymer, and a cross-linked acrylic polymer is prepared. These are adjusted at a predetermined ratio of, for example, 1: 1, diluted with water to a predetermined viscosity (for example, 1500 cps), and filled in the impregnation tank 14.
- the first fluororesin is an aqueous dispersion of fluorine-containing seed polymer particles, and an aqueous dispersion polymerization of a monomer containing at least one fluoroolefin in the presence of the compound (1) represented by the formula (1)
- the formula (1) in the step (I): CH 2 CHCH 2 —O—R (1) (Wherein R represents an oxygen atom, a nitrogen atom and / or a hydrocarbon group optionally having a polar group), and a monomer containing at least one fluoroolefin in the presence of the compound (1).
- Aqueous dispersion polymerization is performed to produce an aqueous dispersion of the fluoropolymer (A) particles.
- R of the compound (1) represented by the formula (1) is a hydrocarbon group which may have an oxygen atom, a nitrogen atom and / or a polar group.
- the hydrocarbon group R may contain two or more oxygen atoms, nitrogen atoms and polar groups.
- the hydrocarbon group R may be linear or branched.
- the molecular weight is preferably 45 to 5000.
- the polar group may be at the end of the hydrocarbon group R or at the end of the branched chain.
- the polar group for example -L - M + (L - is SO 3 -, OSO 3 -, PO 3 -, OPO 3 -, COO - , etc.; M + is a monovalent cation, such as lithium ion, potassium ion, Examples include groups represented by sodium ion, rubidium ion, cesium ion, ammonium ion and the like.
- R is the formula (2): (Wherein X is H or SO 3 Y (Y is NH 4 or an alkali metal atom such as Na, K); n is an integer of 0 to 19)
- a compound (2) represented by: R is the formula (3): -(AO) p -X (3)
- AO is a linear or branched oxyalkylene group having 2 to 4 carbon atoms; p is a positive integer; X is H or SO 3 Y (Y is NH 4 or an alkali metal atom such as Na, K); when a plurality of AO are present, they may be the same or different from each other, and may form two or more block structures)
- CH 2 CR 1 -R 2 -O- (AO) p -X
- R 1 is a hydrogen atom or an alkyl group
- R 2 is an alkylene group having 2 or more carbon atoms
- AO is a linear or branched oxyalkylene group having 2 to 4 carbon atoms
- p is a positive integer
- X is H or SO 3 Y (Y is NH 4 or an alkali metal atom); when a plurality of AO are present, they may be the same or different from each other, and may form two or more types of block structures ) Is preferred.
- R 1 is a hydrogen atom or an alkyl group, and an alkyl group having 1 to 10 carbon atoms, particularly a methyl group is preferred from the viewpoint of good stability of the resulting dispersion.
- R 2 is an alkylene group having 2 or more carbon atoms, and may be linear or branched. Of these, an alkylene group having 2 to 10 carbon atoms, particularly a linear alkylene group having 2 to 4 carbon atoms is preferable from the viewpoint of good dispersion stability.
- AO is a linear or branched oxyalkylene group having 2 to 4 carbon atoms such as ethylene oxide (—CH 2 CH 2 O—), propylene oxide, butylene oxide, tetrahydrofuran, and —CH (CH 3 ) O—. And can be obtained by a method such as addition polymerization of alkylene oxide.
- AO is formed by addition polymerization of alkylene oxide, AO is determined by the alkylene oxide to be added.
- a polymerization form such as alkylene oxide to be added is not limited, and may be homopolymerization of one alkylene oxide, random copolymerization, block copolymerization or random / block copolymerization of two or more alkylene oxides.
- P is a positive integer, for example, preferably 0 to 1,000, more preferably 1 to 200, and particularly preferably 10 to 40.
- CH 2 CR 3 —R 4 —O— (BO) m — (EO) n —X
- R 3 is an alkyl group having 1 to 10 carbon atoms
- R 4 is a linear alkylene group having 2 to 10 carbon atoms
- X is the same as in formula (1)
- BO is a butylene oxide unit
- EO is CH 2 CH 2 O or CH (CH 3 ) O units
- m is an integer of 0 to 50
- n is an integer of 0 to 100
- m + n is an integer of 0 to 150
- the compound (3) include, but are not limited to, the following. CH 2 ⁇ C (CH 3 ) CH 2 CH 2 —O— (BO) m — (EO) n —H, CH 2 ⁇ C (CH 3 ) CH 2 CH 2 —O— (BO) m — (EO) n —SO 3 NH 4 , (Wherein BO, EO, n and m are the same as above) are preferred.
- Latemu PD-104 and PD-420 manufactured by Kao Corporation examples include Latemu PD-104 and PD-420 manufactured by Kao Corporation.
- Examples of commercially available products include Aqualon KH-10 manufactured by Daiichi Kogyo Seiyaku Co., Ltd.
- VDF / TFE copolymer As the vinylidene fluoride copolymer contained in the first fluororesin, VDF / TFE copolymer, VDF / TFE / CTFE copolymer, VDF / HFP copolymer VDF / TFE / HFP copolymer, VDF / A CTFE copolymer may be used.
- 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.
- fluoroolefin examples 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, 2, Non-perfluoroolefins such as 3,3,3-tetrafluoropropene, 1,3,3,3-tetrafluoropropene and 1,1,3,3,3-pentafluoropropene are listed.
- PAVE include perfluoro (methyl vinyl ether) (PMVE), perfluoro (ethyl vinyl ether) (PEVE), perfluoro (propyl vinyl ether) (PPVE),
- functional group-containing fluoroolefin monomers can be used.
- Non-perfluoroolefins include iodine-containing monomers such as perfluoro (6,6-dihydro-6-iodo-3-oxa-acid described in JP-B-5-63482 and JP-A-62-12734. Periodinated vinyl ethers such as 1-hexene) and perfluoro (5-iodo-3-oxa-1-pentene) can also be used.
- a non-fluorinated monomer copolymerizable with a fluoroolefin may be used in combination.
- aqueous dispersion polymerization is performed in the presence of compound (1) (surfactant).
- surfactant examples 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.
- emulsion polymerization applied to the initial stage of seed polymerization, that is, seed particle production is preferable in that the number of particles can be increased even if the amount of the surfactant in the obtained fluoropolymer is the same.
- the amount of compound (1) used is preferably 10 to 5000 ppm, more preferably 20 to 4000 ppm based on the total amount of water.
- 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 fluorine-containing surfactant or a non-fluorine (hydrocarbon) surfactant (except for the compound of the formula (1)).
- fluorine-containing surfactant a fluorine-containing anionic surfactant is preferable.
- fluorine-containing anionic surfactant known ones can be used.
- US Patent Application Publication No. 2007/0015864 US Patent Application Publication No. 2007/0015865, US Patent Application Publication No. 2007/0015866.
- No. Frets, WO 2007/119526 pamphlet, WO 2007/046482 pamphlet, those described in WO 2007/046345 pamphlet can be exemplified.
- fluorine-containing surfactants that can be used in combination include, for example, F (CF 2 ) n COOM, CF 3 CF 2 CF 2 OCF (CF 3 ) CF 2 OCF (CF 3 ) COOM, CF 3 CF 2 OCF (CF 3) CF 2 OCF (CF 3 ) COOM, CF 3 OCF (CF 3) CF 2 OCF (CF 3) COOM, H (CF 2 CF 2) 2 CH 2 OCF (CF 3) COOM, H (CF 2) m COOM, C 6 F 13 CH 2 CH 2 SO 3 M, F (CF 2 CF 2) p CH 2 CH 2 SO 3 M, F (CF 2 CF 2) q CH 2 CH 2 SO 4 M ( wherein, M Is a monovalent cation; n is an integer of 2 to 5; m is an integer of 2 to 10; p is an integer of 2 to 10; q is an integer of 2 to 10).
- fluorine-containing surfactants having 6 or less carbon atoms can increase the concentration of the fluorine-containing polymer in the resulting polymerization product liquid and can be stably dispersed. It is preferable because it can be used as a liquid.
- 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 5000 ppm, more preferably 20 to 4000 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 active ability tends to decrease and the number of generated particles tends to decrease.
- examples of the surfactant that can be used in combination include a fluorine-containing reactive surfactant composed of a fluorine-containing compound having a radical polymerizable unsaturated bond and a hydrophilic group in the molecule.
- the fluorine-containing reactive surfactant can constitute a part of the polymer chain of the polymer when it is present in the reaction system during the polymerization.
- a fluorine-containing compound described in JP-A-8-67795 can be used.
- Polymerization temperature is not particularly limited, and an optimum temperature is employed according to the type of 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.
- 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 tend to 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 modifier 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, and 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, but stirring with a large blade called 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.
- step (I) of the present invention it can be obtained stably even if the concentration of the fluoropolymer in the polymerization product liquid is increased.
- a stable aqueous dispersion of a fluoropolymer can be obtained even when the fluoropolymer concentration is about 45% by mass.
- a fluorine-containing anionic surfactant having 6 or less carbon atoms is used in combination, an aqueous dispersion of a fluorine-containing polymer having a high concentration exceeding 45% by mass, for example, 45 to 55% by mass in a stable state. Obtainable.
- the fluoropolymer (A) particles obtained in the step (I) have a number average particle diameter of about 100 to 200 nm, a number average molecular weight of about 1.0 ⁇ 10 4 to 1.0 ⁇ 10 6, and a molecular weight distribution ( Mw / Mn) is also as sharp as 2-5.
- the number of particles in the aqueous dispersion is 1 ⁇ 10 14 to 1 ⁇ 10 15 particles / water 1 g).
- step (II) the ethylenically unsaturated monomer in the aqueous dispersion in which the aqueous dispersion of the fluoropolymer (A) particles obtained in step (I) is used as it is or diluted with water to adjust the number of particles.
- the body is seed-polymerized into the fluoropolymer (A) particles.
- the seed polymerization carried out in the step (II) is a conventionally known polymerization method (for example, JP-A-8-67795, etc.), and an ethylenically unsaturated monomer is added to an aqueous dispersion of polymer particles to obtain polymer particles.
- an ethylenically unsaturated monomer is subjected to aqueous dispersion polymerization using (seed particles) as a nucleus.
- emulsion polymerization or suspension polymerization can be exemplified as in the step (I), and emulsion polymerization is particularly preferable from the viewpoint of easy homogenization of polymer particles.
- Conventionally known conditions can be adopted as conditions for seed polymerization in the step (II) of the present invention.
- the compound (1) can be used alone, or the emulsion polymerization proceeds sufficiently stably, but may be used in combination with other surfactants.
- the compounds and amounts exemplified in the step (I) can be employed in the step (II).
- the amount of compound (1) used in step (II) is preferably 10 to 5000 ppm, more preferably 20 to 4000 ppm, based on the total amount of water.
- the amount of the compound (1) used is less than 10 ppm, the surface activity tends to be small and a stable aqueous dispersion tends to be difficult to obtain.
- the ethylenically unsaturated monomer to be seed-polymerized in the step (II) may be any monomer having a radical polymerizable ethylenically unsaturated bond, but acrylic acid or methacrylic acid esters, unsaturated carboxylic acid Preferred are acids, hydroxyl group-containing alkyl vinyl ethers, carboxylic acid vinyl esters, ⁇ -olefins and the like.
- esters of acrylic acid or methacrylic acid include alkyl esters having 1 to 10 carbon atoms such as methyl acrylate, ethyl acrylate, and n-propyl acrylate because of their good compatibility with the fluoropolymer (A).
- (Meth) such as isopropyl acrylate, n-butyl acrylate, methyl methacrylate, n-propyl methacrylate, ethyl methacrylate, n-butyl methacrylate, isopropyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, cyclohexyl acrylate, cyclohexyl methacrylate.
- acrylic acid can be exemplified.
- unsaturated carboxylic acids include acrylic acid, methacrylic acid, vinyl acetic acid, crotonic acid, cinnamic acid, 3-allyloxypropionic acid, 3- (2-allyloxyethoxycarbonyl) propionic acid, itaconic acid, itacone.
- examples thereof include acid monoesters, maleic acid, maleic acid monoesters, maleic anhydride, fumaric acid, fumaric acid monoesters, vinyl phthalate, vinyl pyromellitic acid, and undecylenic acid.
- vinyl acetate, crotonic acid, itaconic acid, maleic acid, maleic acid monoester, fumaric acid, fumaric acid monoester, 3-allyloxypropionic acid and undecylenic acid which have low homopolymerization, have low homopolymerization. It is preferable because it is difficult to form a homopolymer and the introduction of carboxyl groups is easily controlled.
- hydroxyl-containing alkyl vinyl ethers include 2-hydroxyethyl vinyl ether, 3-hydroxypropyl vinyl ether, 2-hydroxypropyl vinyl ether, 2-hydroxy-2-methylpropyl vinyl ether, 4-hydroxybutyl vinyl ether, 4-hydroxy- Examples thereof include 2-methylbutyl vinyl ether, 5-hydroxypentyl vinyl ether, 6-hydroxyhexyl vinyl ether, 2-hydroxyethyl allyl ether, 4-hydroxybutyl allyl ether, and glycerol monoallyl ether.
- 4-hydroxybutyl vinyl ether and 2-hydroxyethyl vinyl ether are preferable in terms of excellent polymerization reactivity.
- vinyl carboxylates include, for example, vinyl acetate, vinyl propionate, vinyl butyrate, vinyl isobutyrate, vinyl pivalate, vinyl caproate, vinyl versatate, vinyl laurate, vinyl stearate, vinyl cyclohexyl carboxylate.
- vinyl benzoate, vinyl para-t-butylbenzoate, and the like which can impart properties such as improved gloss and increased glass transition temperature to the coating film.
- ⁇ -olefins examples include ethylene, propylene, n-butene, and isobutene, and can impart properties such as improved flexibility to the coating film.
- the ethylenically unsaturated monomer used for the seed polymerization is preferably 5 to 400 parts by mass, more preferably 10 to 150 parts by mass with respect to 100 parts by mass of the fluoropolymer particles (A) (solid content).
- the fluorine-containing seed polymer (B) particles obtained through the steps (I) and (II) have an average particle size of about 110 to 300 nm and a number average molecular weight of 1.0 ⁇ 10 4 to 1.0 ⁇ 10.
- the molecular weight distribution (Mw / Mn) is as sharp as 1.5 to 4.0.
- the number of particles in the aqueous dispersion is 1 ⁇ 10 12 to 1 ⁇ 10 15 particles / g water.
- the first fluororesin can be applied to various uses as it is or after being appropriately modified.
- the fluorine-containing seed polymer (B) particles are used as a film forming material of the aqueous coating composition.
- concentration of the fluorine-containing seed polymer (B) particles may be selected from a range of about 10 to 60% by mass, for example.
- the aqueous dispersion of the fluorine-containing seed polymer (B) particles is preliminarily mixed with water, titanium oxide, etc. using a pigment disperser such as a sand mill. After stirring and mixing a predetermined amount of a pigment dispersion in which a pigment, an antifoaming agent, a pigment dispersant, a pH adjuster, and the like are mixed with a predetermined amount of a film-forming auxiliary, a predetermined amount of a thickener is added and mixed. What is necessary is just to add a required additive suitably.
- aqueous coating composition without adding a pigment, water, a film-forming auxiliary agent, an antifoaming agent, a thickening agent, and a pH adjustment, if necessary, in an aqueous dispersion of fluorine-containing seed polymer (B) particles
- Additives and other required additives may be added and stirred and mixed by a known method.
- Additives for the first fluororesin include film-forming aids, antifreeze agents, pigments, fillers, pigment dispersants, antifoaming agents, leveling agents, rheology modifiers, preservatives, UV absorbers as necessary Antioxidants, matting agents, lubricants, vulcanizing agents and the like can also be added.
- Average particle size measuring device Microtrack UPA manufactured by HONEYWELL Measurement method: dynamic light scattering method
- the emulsion to be measured is diluted to a concentration measurable with pure water to make a sample, and measurement is performed at room temperature.
- the number average diameter of the obtained data is defined as the particle diameter.
- MFR Melt flow rate
- a Dynasco melt index tester manufactured by Yasuda Seiki Seisakusho Co., Ltd., put about 6 g of resin into a 0.376 inch ID cylinder maintained at 250 ° C. ⁇ 0.5 ° C. for 5 minutes. After allowing the temperature to reach an equilibrium state, the average value of three times taken at the same time when extruded through an orifice having a diameter of 0.0825 inch and a length of 0.315 inch under a piston load of 10 kg was taken. The unit is g / 10 minutes.
- Example 1 (Production of aqueous dispersion of fluorine-containing seed polymer (B-1) particles) Step (I) In a 2 L stainless steel autoclave, 500 g of ion-exchanged water, 2.2 g of a 50 mass% aqueous solution of ammonium perfluorohexanoate (C6) (concentration of ammonium perfluorohexanoate 2200 ppm / water.
- C6 ammonium perfluorohexanoate
- a polymerization initiator solution prepared by dissolving 1.00 g of ammonium persulfate (APS) in 4 ml of ion exchange water and 0.75 g of ethyl acetate were injected with nitrogen gas, and the reaction was started while stirring at 600 rpm.
- APS ammonium persulfate
- Coagulation was performed by freezing 200 g of this aqueous dispersion at ⁇ 10 ° C. for 24 hours. The obtained coagulated product was washed with water and dried to obtain a fluoropolymer (A-1).
- the MFR of this fluoropolymer (A-1) was 4.96 g / 10 min.
- the number average molecular weight (Mn) and the weight average molecular weight (Mw) of this fluoropolymer (A-1) measured by GPC were 9.12 ⁇ 10 4 and 4.03 ⁇ 10 5, respectively, and the molecular weight distribution Mw / Mn was 4.42.
- MMA methyl methacrylate
- BA butyl acrylate
- Ac acrylic acid
- 280.0 g of water 467.5 g of methyl methacrylate (MMA), 4.8 g of butyl acrylate (BA), 4.8 g of acrylic acid (Ac), 2.4 g of mercaptan, and 159.0 g of water are added to a 0.5 L flask and emulsified.
- a pre-emulsion was prepared by mixing thoroughly with a machine.
- This pre-emulsified solution is gradually added to the aqueous dispersion of the fluorine-containing polymer described above and mixed thoroughly. Thereafter, polyethylene glycol monomethyl ether methacrylate (RMA manufactured by Nippon Emulsifier Co., Ltd.) is used as a surfactant. 450 (trade name)) 15.9 g (12300 ppm / water), methacryloyloxypolyoxyalkylene sulfate sodium salt (RS-3000 (trade name) manufactured by Sanyo Chemical Co., Ltd.) 50% aqueous solution 95.4 g (36800 ppm) / Water) and mixed well.
- RMA polyethylene glycol monomethyl ether methacrylate
- the internal temperature was raised to 75 ° C., and polymerization was advanced while 75.15 g of ammonium persulfate (APS) (1% by mass aqueous solution) was added in four portions every 40 minutes.
- APS ammonium persulfate
- the reaction solution was cooled to room temperature to complete the reaction, whereby an aqueous dispersion of the fluorine-containing seed polymer (B-1) was obtained (the amount obtained was 3046.7 g, the solid content concentration was 51.7 mass). %).
- the average particle size of the obtained seed polymer was 159.4 nm.
- a polymerization initiator solution prepared by dissolving 1.00 g of ammonium persulfate (APS) in 4 ml of ion exchange water and 0.75 g of ethyl acetate were injected with nitrogen gas, and the reaction was started while stirring at 600 rpm.
- APS ammonium persulfate
- the obtained fluoropolymer had an average particle size of 143 nm, and the number of particles in the aqueous dispersion was 7.43 ⁇ 10 14 (pieces / water 1 g).
- Coagulation was performed by freezing 200 g of this aqueous dispersion at ⁇ 10 ° C. for 24 hours. The obtained coagulated product was washed with water and dried to obtain a fluoropolymer (A-2).
- the MFR of this fluoropolymer (A-2) was 6.51 g / 10 min.
- the number average molecular weight (Mn) and the weight average molecular weight (Mw) of this fluoropolymer (A-2) measured by GPC are 2.36 ⁇ 10 4 and 7.48 ⁇ 10 4 , respectively.
- the distribution Mw / Mn was 3.18.
- MMA methyl methacrylate
- BA butyl acrylate
- Ac acrylic acid
- 280.0 g of water 467.5 g of methyl methacrylate (MMA), 4.8 g of butyl acrylate (BA), 4.8 g of acrylic acid (Ac), 2.4 g of mercaptan, and 159.0 g of water are added to a 0.5 L flask and emulsified.
- a pre-emulsion was prepared by mixing thoroughly with a machine.
- This pre-emulsified solution is gradually added to the aqueous dispersion of the fluorine-containing polymer described above and mixed thoroughly. Thereafter, polyethylene glycol monomethyl ether methacrylate (RMA manufactured by Nippon Emulsifier Co., Ltd.) is used as a surfactant. 450 (trade name)) 15.9 g (12300 ppm / water), methacryloyloxypolyoxyalkylene sulfate sodium salt (RS-3000 (trade name) manufactured by Sanyo Chemical Co., Ltd.) 50% aqueous solution 95.4 g (36800 ppm) / Water) and mixed well.
- RMA polyethylene glycol monomethyl ether methacrylate
- the internal temperature was raised to 75 ° C., and polymerization was advanced while 75.15 g of ammonium persulfate (APS) (1% by mass aqueous solution) was added in four portions every 40 minutes.
- APS ammonium persulfate
- the average particle size of the obtained seed polymer was 166.6 nm.
- Example 3 (Production of aqueous dispersion of fluorine-containing seed polymer (B-3) particles) Step (I) In a 2 L stainless steel autoclave, 500 g of ion-exchanged water, 0.5 g of ammonium perfluorooctanoate (C8) 50% aqueous solution (ammonium perfluorooctanoate concentration of 1000 ppm / water) and polyethylene glycol monostearate (Nikko Chemicals ( 0.75 g (150 ppm / water) manufactured by MYS-40 (trade name) manufactured by Kogyo Co., Ltd. was charged, the inside of the system was sufficiently replaced with nitrogen gas, and the pressure was reduced.
- Coagulation was performed by freezing 200 g of this aqueous dispersion at ⁇ 10 ° C. for 24 hours. The obtained coagulated product was washed with water and dried to obtain a fluoropolymer (A-3).
- the MFR of this fluoropolymer (A-3) was 5.15 g / 10 min. Further, since this fluoropolymer (A-3) was not dissolved in THF, the molecular weight using GPC could not be measured.
- MMA methyl methacrylate
- BA butyl acrylate
- Ac acrylic acid
- mercaptan 2.4 g of mercaptan
- This pre-emulsified solution is gradually added to the aqueous dispersion of the fluorine-containing polymer described above and mixed thoroughly. Thereafter, polyethylene glycol monomethyl ether methacrylate (RMA manufactured by Nippon Emulsifier Co., Ltd.) is used as a surfactant. 450 (trade name)) 15.9 g (12300 ppm / water), methacryloyloxypolyoxyalkylene sulfate sodium salt (RS-3000 (trade name) manufactured by Sanyo Chemical Co., Ltd.) 50% aqueous solution 95.4 g (36800 ppm) / Water) and mixed well.
- RMA polyethylene glycol monomethyl ether methacrylate
- the internal temperature was raised to 75 ° C., and polymerization was advanced while 75.15 g of ammonium persulfate (APS) (1% by mass aqueous solution) was added in four portions every 40 minutes.
- APS ammonium persulfate
- the obtained seed polymer had an average particle size of 169.5 nm.
- Examples 4-6 The aqueous dispersion of the fluorine-containing seed polymer (B) produced in each of Examples 1 to 3 was used as it was, and a weather-resistant aqueous paint composition (white paint composition) for construction was prepared according to the following formulation.
- the obtained white paint composition was applied to a slate plate (preliminary paint (DK7151 (trade name) manufactured by Nichigo Movinyl Co., Ltd.) so that the dry film thickness was 150 g / m 2 and dried at room temperature for 1 day.
- the coated plate was coated with a brush so that the film thickness was 150 g / m 2 and dried at room temperature for 1 day.
- test coated plate was examined for freeze-thaw resistance, hot water resistance, low-temperature film-forming property, foamability and gloss (60 °). The results are shown in Table 1.
- Aqueous dispersion of fluorine-containing seed polymer (B) 65.00 parts by weight Water 9.12 parts by weight Titanium oxide 31.39 parts by weight Pigment dispersant 2.35 parts by weight Antifreezing agent 1.79 parts by weight pH adjuster 0 .04 parts by weight Antifoaming agent 0.11 parts by weight Thickener 1 0.38 parts by weight Thickener 2 0.40 parts by weight Film-forming aid 2.35 parts by weight
- Titanium oxide Ishihara Sangyo Co., Ltd. Taipaek CR-97 (trade name) Pigment dispersant: Nopco Spurs SN-5027 (trade name) manufactured by San Nopco Antifreeze agent: Ethylene glycol pH adjuster: Ammonia water defoamer: FS Antifoam 013A (trade name) manufactured by Dow Corning
- Thickener 1 Adecanol UH-420 (trade name) manufactured by Asahi Denka Kogyo Co., Ltd.
- Thickener 2 Primal ASE-60 (trade name) manufactured by Rohm and Hearts Japan Film-forming aid: Diethyl adipate
- the second fluororesin is a shift clear (SIFCCLEAR: JSR Corporation, trademark) in which a vinylidene fluoride polymer and an acrylic polymer are compatible at a molecular level, and butyl cellosolve is added.
- SIFCCLEAR JSR Corporation, trademark
- the second fluororesin in the present embodiment is as follows: (a) In the aqueous medium, the following (A) component, (B) radical polymerizable monomer, (C) emulsifier and (D) (A) component After the hydrolysis catalyst is mixed and emulsified, the hydrolysis / condensation reaction of component (A) proceeds, and then the emulsion is refined, and then (E) a radical polymerization initiator is added and reacted, and component (B) Composite polymer particles obtained by advancing the polymerization reaction, and (b) copolymer particles of radical polymerizable fluorine-containing monomer and (meth) acrylic monomer and / or fluorine-containing polymer and (meth) An aqueous dispersion comprising composite polymer particles with an acrylic polymer, (A): At least one selected from the group consisting of an organosilane represented by the following general formula (3-1), a hydrolyzate of the organosilane, and a partial condensate of
- R 1 represents a monovalent organic group having 1 to 8 carbon atoms, and two R 1 s may be the same or different from each other, and R 2 is a straight chain having 1 to 5 carbon atoms A branched alkyl group or an acyl group having 1 to 6 carbon atoms, and two R 2 s may be the same or different from each other, and n is an integer of 0 to 2.
- the above component (A) is prepared by mixing and emulsifying the following component (A), (B) radical polymerizable monomer, (C) emulsifier and (D) hydrolysis catalyst of component (A). After proceeding with the decomposition / condensation reaction, the emulsion is made finer, then (E) a radical polymerization initiator is added and reacted, and the composite polymer particles (B) obtained by proceeding the polymerization reaction of component (B) Hereinafter, it is referred to as “(a) composite polymer particle”).
- (a) composite polymer particle Each component used for manufacture of composite polymer particle and (a) manufacturing method of composite polymer particle are demonstrated.
- the component (A) used in the present invention includes an organosilane represented by the general formula (1) (hereinafter referred to as “organosilane (1)”), a hydrolyzate of organosilane (1), and the hydrolysis. It consists of at least 1 sort (s) chosen from the group with the condensate of a thing.
- examples of the monovalent organic group having 1 to 8 carbon atoms of R1 include a phenyl group; a methyl group, an ethyl group, an n-propyl group, an i-propyl group, and an n-butyl group. I-butyl group, sec-butyl group, t-butyl group, n-hexyl group, n-heptyl group, n-octyl group, 2-ethylhexyl group, cyclopentyl group, cyclohexyl group, etc.
- Cyclic alkyl group acyl group such as acetyl group, propionyl group, butyryl group, valeryl group, benzoyl group, trioyl group, caproyl group; alkenyl group such as vinyl group, allyl group, and substituted derivatives of these groups,
- An epoxy group, a glycidyl group, a (meth) acryloyloxy group, a ureido group, an amide group, a fluoroacetamide group, an isocyanate group, and the like can be given.
- Examples of the substituent in the substituted derivative of R 1 include a halogen atom, a substituted or unsubstituted amino group, a hydroxyl group, a mercapto group, an isocyanate group, a glycidoxy group, a 3,4-epoxycyclohexyl group, and a (meth) acryloyloxy.
- the total carbon number of R1 consisting of these substituted derivatives is It is 8 or less including the carbon atom in a substituent.
- Examples of the linear or branched alkyl group having 1 to 5 carbon atoms of R 2 include a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, and a sec-butyl group. , Examples thereof include a t-butyl group and an n-pentyl group.
- Examples of the acyl group having 1 to 6 carbon atoms include an acetyl group, a propionyl group, a butyryl group, a valeryl group, and a caproyl group.
- organosilane (1) include tetraalkoxysilanes such as tetramethoxysilane, tetraethoxysilane, tetra-n-propoxysilane, tetra-i-propoxysilane, tetra-n-butoxysilane; methyltrimethoxysilane , Methyltriethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, n-propyltrimethoxysilane, n-propyltriethoxysilane, i-propyltrimethoxysilane, i-propyltriethoxysilane, n-butyltrimethoxysilane , N-butyltriethoxysilane, n-pentyltrimethoxysilane, n-hexyltrimethoxysilane, n-heptyl
- organosilanes (1) trialkoxysilanes and dialkoxysilanes are preferred. Further, as the trialkoxysilanes, methyltrimethoxysilane and methyltriethoxysilane are preferable, and as the dialkoxysilanes, dimethyldimethoxysilane and dimethyldiethoxysilane are preferable.
- the said organosilane (1) can be used individually or in mixture of 2 or more types.
- the hydrolyzate of organosilane (1) in component (A) is a product in which silanol (Si—OH) groups are formed by hydrolysis of Si—OR 2 groups in organosilane (1).
- Si—OH silanol
- partial condensate of the hydrolyzate of organosilane (1) in component (A) (hereinafter simply referred to as “partial condensate”) is obtained by condensation of silanol groups in the hydrolyzate to form siloxane (Si— O—Si) bond is formed, but in the present invention, it is not necessary that all of these groups are condensed, and a mixture in which only a part of the groups are condensed or having a different degree of condensation is also included. It is a concept to do.
- the component (A) in this embodiment is preferably used in a state where the organosilane (1) and the partial condensate are mixed.
- a coating film excellent in various properties can be formed from the final aqueous dispersion.
- the polymerization stability at the time of polymerizing a radically polymerizable monomer by adding the component (E) described later is improved, it can be easily polymerized even in a high solid state, so that it is advantageous in terms of industrialization. There is also.
- dialkoxysilanes particularly dimethyldimethoxysilane, dimethyldiethoxysilane, etc. are preferably used as the organosilane (1).
- dialkoxysilanes a linear portion is added to the organopolysiloxane molecular chain, and the flexibility of the resulting composite polymer particles is increased.
- a coating film is formed using the obtained aqueous dispersion, there is also an effect that a coating film having excellent transparency can be obtained.
- the partial condensate is, in particular, trialkoxysilanes alone or trialkoxysilanes 40 to 95 mol% and dialkoxysilanes 60 to What is obtained from the combination with 5 mol% is preferable.
- trialkoxysilane and dialkoxysilane at this ratio the resulting coating film can be softened and the weather resistance can be improved.
- the organosilane (1) and the partial condensate are used in combination, it is preferable to prepare and use the partial condensate of the organosilane (1) by hydrolyzing and condensing the organosilane (1) in advance.
- the amount of water used in this case is usually about 1.2 to 3.0 mol, preferably about 1.3 to 2.0 mol, per 1 mol of organosilane (1).
- the organic solvent used as necessary is not particularly limited as long as it can be uniformly mixed with the obtained partial condensate and the component (B) described later.
- the organic solvent used as necessary is not particularly limited as long as it can be uniformly mixed with the obtained partial condensate and the component (B) described later.
- alcohols and aromatic hydrocarbons e.g., Ethers, ketones, esters and the like.
- alcohols include methanol, ethanol, n-propyl alcohol, i-propyl alcohol, n-butyl alcohol, sec-butyl alcohol, t-butyl alcohol, n-hexyl alcohol, n -Octyl alcohol, ethylene glycol, diethylene glycol, triethylene glycol, ethylene glycol mono-n-butyl ether, ethylene glycol monoethyl ether acetate, diethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene monomethyl ether acetate, diacetone alcohol, etc. Can do.
- aromatic hydrocarbons include benzene, toluene, xylene, etc.
- ethers include tetrahydrofuran, dioxane, and the like
- ketones include acetone, methyl ethyl ketone, and methyl isobutyl ketone.
- esters such as diisobutylketone and the like include ethyl acetate, n-propyl acetate, n-butyl acetate, and propylene carbonate.
- organic solvents can be used alone or in admixture of two or more. In addition, when an organic solvent is included in the partial condensate, the organic solvent can be removed prior to the condensation / polymerization reaction described later.
- the polystyrene-converted weight average molecular weight (hereinafter referred to as “Mw”) of the partial condensate is usually 800 to 100,000, preferably 1,000 to 50,000.
- Commercially available partial condensates include MKC silicate manufactured by Mitsubishi Chemical Corporation, ethyl silicate manufactured by Colcoat, silicon resin manufactured by Toray Dow Corning, silicon resin manufactured by Toshiba Silicone Co., and Shin-Etsu Chemical.
- the mixing ratio of the organosilane (1) is 95 to 5% by weight (however, converted as a complete hydrolysis condensate), Preferably 90 to 10% by weight, partial condensate 5 to 95% by weight (however, converted as a complete hydrolysis condensate), preferably 10 to 90% by weight [provided that organosilane (1) and its partial condensate Is 100% by weight]. If the partial condensate is less than 5% by weight, the surface of the resulting coating film may become sticky or the curability of the coating film may be reduced.
- the organosilane (1) component The proportion of (A) may be reduced, making it difficult to emulsify the mixture containing the component (A), and the polymerization stability of the component (B) and the stability of the emulsion during the polymerization may be reduced. There is a possibility that the film-forming property of the film may deteriorate.
- the “completely hydrolyzed condensate” refers to a product in which the Si—OR 2 group in the organosilane (1) is 100% hydrolyzed to become a silanol group and further completely condensed to form a siloxane bond. .
- the radical polymerizable monomer used for the fluororesin of the table 2 of the present embodiment is not particularly limited as long as radical polymerization is possible.
- the radical polymerizable monomer include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, i-propyl (meth) acrylate, n-butyl (meth) acrylate, i-butyl (meth) ) Acrylate, sec-butyl (meth) acrylate, t-butyl (meth) acrylate, n-amyl (meth) acrylate, i-amyl (meth) acrylate, n-hexyl (meth) acrylate, n-octyl (meth) Acrylate, 2-ethylhexyl (meth) acrylate, n-decyl (me)
- Unsaturated carboxylic acids such as (meth) acrylic acid, crotonic acid, maleic acid, fumaric acid, itaconic acid; Unsaturated carboxylic acid anhydrides such as maleic anhydride and itaconic anhydride; Styrene, ⁇ -methylstyrene, 2-methylstyrene, 3-methylstyrene, 4-methylstyrene, 3,4-dimethylstyrene, 4-ethylstyrene, 3,4-diethylstyrene, 4-t-butylstyrene, 4- Methoxystyrene, 4-ethoxystyrene, 4-hydroxymethylstyrene, 2-chlorostyrene, 3-chlorostyrene, 4-chloro-3-methylstyrene, 2,4-dichlorostyrene, 2,6-dichlorostyrene, 1-vinyl Aromatic vinyl compounds such as naphthalene and divinylbenzen
- Unsaturated imide compounds such as maleimide, N-cyclohexylmaleimide, N-phenylmaleimide; Vinyl cyanide compounds such as (meth) acrylonitrile and ⁇ -chloroacrylonitrile; 1,1,1-trimethylamine (meth) acrylimide, 1-methyl-1-ethylamine (meth) acrylimide, 1,1-dimethyl-1- (2-hydroxypropyl) amine (meth) acrylimide, 1,1-dimethyl-1- (2-phenyl-2-hydroxyethyl) amine (meth) acrylimide, 1,1-dimethyl-1- (2-hydroxy -2-phenoxypropyl) amine (meth) acrylimide and other amineimide group-containing vinyl compounds; Unsaturated ether compounds such as ethyl vinyl ether, 2-hydroxyethyl vinyl ether, 2-aminoethyl vinyl ether, allyl glycidyl ether; (meth) a
- R 3 represents a hydrogen atom or a methyl group
- R 4 represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms
- R 5 represents an alkyl group having 1 to 3 carbon atoms
- R 6 represents a carbon atom
- An ald group-containing unsaturated compound such as ⁇ - (meth) acryloxy- ⁇ , ⁇ -dialkylpropanals represented by: Diacetone (meth) acrylamide, vinyl alkyl ketones having 4 to 7 carbon atoms (for example, vinyl methyl ketone, vinyl ethyl ketone, vinyl-n-propyl ketone, vinyl-i-propyl ketone, vinyl-n-butyl ketone, vinyl-i) -Butyl ketone, vinyl-t-butyl ketone, etc.), vinyl phenyl ketone, vinyl benzyl ketone, divinyl ketone, diacetone (meth) acrylate, acetonitrile (meth) acrylate, 2-hydroxypropyl (meth) acrylate-acetyl acetate, 3-hydroxypropyl (Meth) acrylate-acetyl acetate, 2-hydroxybutyl (meth) acrylate-acetyl a
- ⁇ - (meth) acryloxy- ⁇ , ⁇ -dialkylpropanals include ⁇ - (meth) acryloxy- ⁇ , ⁇ -dimethylpropanal (that is, ⁇ - (meth) acryloxypivalin aldehyde), ⁇ - (meth) acryloxy- ⁇ , ⁇ -diethylpropanal, ⁇ - (meth) acryloxy- ⁇ , ⁇ -dipropylpropanal, ⁇ - (meth) acryloxy- ⁇ -methyl- ⁇ -butylpropanal, ⁇ - And (meth) acryloxy- ⁇ , ⁇ , ⁇ -trimethylpropanal.
- the radical polymerizable monomer is preferably a (meth) acrylic compound, more preferably a (meth) acrylic acid ester, a hydroxyl group-containing (meth) acrylic acid ester, a (meth) acrylic acid, an unsaturated amide, a keto group.
- unsaturated compounds particularly preferably methyl methacrylate, n-butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, cyclohexyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, polyethylene glycol mono (Meth) acrylate, glycidyl (meth) acrylate, (meth) acrylic acid, (meth) acrylamide, N, N-dimethyl (meth) acrylamide, diacetone (meth) acrylamide and the like.
- the proportion of component (A) and component (B) used in the aqueous dispersion is such that component (A) is usually 1 to 99 parts by weight (however, converted as a complete hydrolysis condensate), preferably 5 to 95 parts by weight.
- the proportion of component (B) used is less than 1 part by weight, the film formability and crack resistance tend to be reduced, while when it exceeds 99 parts by weight, the weather resistance tends to be reduced.
- Emulsifier- for example, any of an anionic surfactant, a nonionic surfactant, a cationic surfactant, an amphoteric surfactant and a water-soluble polymer can be used.
- anionic surfactant examples include alkali metal salts of higher alcohol sulfates, alkali metal salts of alkylbenzene sulfonic acids, alkali metal salts of succinic acid dialkyl ester sulfonic acids, alkali metal salts of alkyl diphenyl ether disulfonic acids, Oxyethylene alkyl ether sulfate ester salt, polyoxyethylene alkyl phenyl ether sulfate ester salt, polyoxyethylene alkyl ether phosphate ester salt, polyoxyethylene alkyl phenyl ether phosphate ester salt, etc.
- Latemulu S-180A (manufactured by Kao Corporation), Eleminol JS-2 (manufactured by Sanyo Chemical Co., Ltd.), Aqualon HS-10 (manufactured by Daiichi Kogyo Seiyaku Co., Ltd.), Adekaria Soap SE-10N (Asahi Denka) Manufactured by Kogyo Co., Ltd.) It can be mentioned reactive anionic surfactants.
- nonionic surfactant examples include polyoxyethylene alkyl ether and polyoxyethylene alkylphenyl ether, and the following trade names: Aqualon RS-20 (Daiichi Kogyo Seiyaku Co., Ltd.), A reactive nonionic surfactant such as Adeka Soap NE-20 (Asahi Denka Kogyo Co., Ltd.) can be used.
- cationic surfactant examples include alkylpyridinyl chlorides, alkylamine acetates, alkylammonium chlorides and the like, as well as diallyl as described in JP-A-60-235631. Mention may be made of reactive cationic surfactants such as ammonium halides.
- amphoteric surfactant for example, carboxylic acid type amphoteric surfactants such as amino acid type and betainic acid type, and sulfonic acid type amphoteric surfactants are suitable.
- water-soluble polymer a well-known alkali-soluble polymer etc. can be used, for example. These surfactants can be used alone or in admixture of two or more.
- the amount of the emulsifier used is usually 0.1 to 10 parts by weight, preferably 0. 10 parts by weight, based on a total of 100 parts by weight of the component (A) (however, converted as a completely hydrolyzed condensate) and the component (B). 2 to 5 parts by weight.
- the amount of the emulsifier used is less than 0.1 parts by weight, it is difficult to sufficiently emulsify the reaction components, and the stability of the emulsion during hydrolysis / condensation and radical polymerization tends to be reduced. If it exceeds 10 parts by weight, foaming increases and workability may be deteriorated.
- hydrolysis catalyst of component (A) (hereinafter simply referred to as “hydrolysis catalyst”), the condensation reaction of component (A) is further promoted, The molecular weight of the produced organopolysiloxane is increased, and a coating film excellent in strength, long-term durability and the like can be formed from the obtained aqueous dispersion.
- hydrolysis catalyst examples include acidic compounds, alkaline compounds, salt compounds, amine compounds, organometallic compounds and / or partial hydrolysates thereof (hereinafter, organometallic compounds and / or partial hydrolysates are collectively referred to as “organic And the like ”) and the like.
- organometallic compounds and / or partial hydrolysates are collectively referred to as “organic And the like ” and the like.
- the acidic compound include acetic acid, hydrochloric acid, sulfuric acid, phosphoric acid, alkyl titanic acid, dodecylbenzenesulfonic acid, p-toluenesulfonic acid, phthalic acid, (B) component (meth) acrylic acid, and the like. be able to.
- acetic acid dodecylbenzenesulfonic acid
- (meth) acrylic acid are preferred.
- radically polymerizable unsaturated carboxylic acid such as (meth) acrylic acid
- the weather resistance and water resistance of the resulting coating film are not deteriorated because it is polymerized as the component (B).
- the content of the radically polymerizable unsaturated carboxylic acid in the component (B) is usually 5% by weight or less, preferably about 0.1 to 3% by weight.
- alkaline compound examples include sodium hydroxide and potassium hydroxide. Of these alkaline compounds, sodium hydroxide is preferred.
- the salt compounds include alkali metal salts such as naphthenic acid, octylic acid, nitrous acid, sulfurous acid, aluminate, and carbonic acid.
- amine compound examples include ethylenediamine, tetramethylenediamine, hexamethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, piperidine, piperazine, m-phenylenediamine, p-phenylenediamine, ethanolamine, triethylamine, 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3- (2-aminoethyl) -aminopropyltrimethoxysilane, 3- (2-aminoethyl) -aminopropyltriethoxysilane, 3- (2 -Aminoethyl) -aminopropylmethyldimethoxysilane, 3-anilinopropyltrimethoxysilane, alkylamine salts, quaternary ammonium salts, and as a curing agent for epoxy resins Various modified amines that
- 3-aminopropyl / trimethoxysilane 3-aminopropyl / triethoxysilane, and 3- (2-aminoethyl) -aminopropyl / trimethoxysilane are preferable.
- organometallic compound examples include: Tetra-n-butoxyzirconium, tri-n-butoxyethylacetoacetatezirconium, di-n-butoxybis (ethylacetoacetate) zirconium, n-butoxytris (ethylacetoacetate) zirconium, tetrakis (n-propylacetate) Organic zirconium compounds such as acetate) zirconium, tetrakis (acetylacetoacetate) zirconium, tetrakis (ethylacetoacetate) zirconium; Organo-titanium compounds such as tetra-i-propoxy titanium, di-i-propoxy bis (ethylacetoacetate) titanium, di-i-propoxy bis (acetylacetate) titanium, di-i-propoxy bis (acetylacetone) titanium ; Tri-i-propoxy aluminum, di-i-propoxy ethyl acetoacetate aluminum, di-i-prop
- Sulfide type organotin compounds such as (C 4 H 9 ) SnCl 3 , (C 4 H 9 ) 2 SnCl 2 , (C 8 H 17 ) 2 SnCl 2 ,
- Chloride-type organotin compounds such as
- Organic tin oxides such as (C 4 H 9 ) 2 SnO, (C 8 H 17 ) 2 SnO, and these organic tin oxides and ester compounds such as ethyl silicate, dimethyl maleate, diethyl maleate, dioctyl phthalate, etc.
- a reaction product etc. can be mentioned.
- organometallic compounds etc., tri-n-butoxy ethyl acetoacetate zirconium, di-i-propoxy bis (acetylacetonate) titanium, di-i-propoxy ethyl acetoacetate aluminum, tris (ethyl acetoacetate) ) Aluminum or a partial hydrolyzate of these compounds is preferred.
- These hydrolysis catalysts can be used alone or in admixture of two or more, and can also be used in admixture with zinc compounds and other reaction retarders.
- the amount of the hydrolysis catalyst used is usually 0.01 to 5 parts by weight, preferably 100 parts by weight in total of the component (A) (however, converted as a complete hydrolysis condensate) and the component (B), preferably The amount is 0.1 to 5 parts by weight, more preferably 0.1 to 3 parts by weight. If the amount of the hydrolysis catalyst used is less than 0.01 parts by weight, the hydrolysis / condensation reaction of the component (A) may be insufficient. On the other hand, if it exceeds 5 parts by weight, the storage stability of the aqueous dispersion may be reduced. It tends to decrease or cracks are likely to occur in the coating film.
- radical polymerization initiator examples include persulfates such as potassium persulfate, sodium persulfate, and ammonium persulfate, hydrogen peroxide, t-butyl hydroperoxide, and t-butyl peroxymaleic acid.
- Water-soluble initiators such as succinic acid peroxide and 2,2'-azobis [2-N-benzylamidino] propane hydrochloride; benzoyl peroxide, cumene hydroperoxide, diisopropyl peroxydicarbonate, cumylperoxyneodeca
- oil-soluble initiators such as noate, cumylperoxyoctoate and azobisisobutyronitrile
- redox initiators using a reducing agent such as acidic sodium sulfite, Rongalite and ascorbic acid.
- the amount of radical polymerization initiator used is usually 0.01 to 5 parts by weight, preferably 100 parts by weight in total of the component (A) (however, converted as a complete hydrolysis condensate) and the component (B). Is 0.05 to 4 parts by weight. If the amount of the radical polymerization initiator used is less than 0.01 parts by weight, the polymerization reaction of the (B) radical polymerizable monomer may be deactivated in the middle. On the other hand, if it exceeds 5 parts by weight, the weather resistance of the coating film may be reduced. May decrease.
- the composite polymer particles are obtained by mixing and emulsifying the components (A) to (D) in an aqueous medium, and then proceeding with the hydrolysis / condensation reaction of the component (A), and then refining the emulsion.
- the component (E) is added and reacted to cause the polymerization reaction of the component (B) to proceed, whereby (a) an aqueous dispersion in which the composite polymer particles are dispersed in an aqueous medium is obtained. It is done.
- the condensation reaction of the hydrolyzate may proceed at the stage of mixing and emulsifying the component (A) to proceed with hydrolysis.
- the polymerization of the component (B) after the emulsion is refined can be said to be one type of miniemulsion polymerization.
- the component (B) is finely dispersed in an aqueous medium so that the average particle size is usually 0.5 ⁇ m or less, preferably 0.3 ⁇ m or less, particularly preferably 0.1 to 0.2 ⁇ m.
- This is emulsion polymerization in which the emulsion is dispersed while being polymerized while maintaining the dispersion state.
- the treatment for refining the emulsion is performed after the hydrolysis / condensation reaction of the component (A) has progressed to some extent.
- Water is the main component of the medium when producing (a) the composite polymer particles, and the amount of water used is added when mixing and emulsifying each component with water previously added to component (A).
- the total amount with water is usually 50 to 2,000 parts by weight, preferably 100 to 100 parts by weight with respect to 100 parts by weight of the total of component (A) (however, converted as a completely hydrolyzed condensate) and component (B). 1,000 parts by weight. If the amount of water used is less than 50 parts by weight, emulsification may be difficult or the stability of the emulsion after emulsification may be reduced. On the other hand, if it exceeds 2,000 parts by weight, the productivity will decrease. It is not preferable.
- the mixed emulsification of each component when producing the composite polymer particles can be carried out using a normal stirring means, and the mixed emulsification and the emulsion miniaturization can be performed, for example, by a high-pressure homogenizer or homomixer. It can be performed using an ultrasonic disperser or the like.
- the conditions for the hydrolysis / condensation reaction of component (A) and the polymerization reaction of component (B) are such that the reaction temperature is usually 25 to 90 ° C., preferably 40 to 80 ° C., and the reaction time is usually 0.5 to 15 hours, preferably 1 to 8 hours.
- the hydrolysis / condensation reaction of organosilane (1) in component (A) proceeds first in the emulsified state, and the polymerization reaction of component (B) Proceeds after the (E) component is added.
- the condensation reaction in the case where the component (A) contains the organosilane (1) and the partial condensate includes not only the hydrolysis reaction of the organosilane (1) or the partial condensate alone, but also the organosilane (1 ) Co-condensation reaction of the hydrolyzate and partial condensate may proceed simultaneously.
- the organopolysiloxane component derived from the component (A) and the vinyl polymer component derived from the component (B) are mutually A penetrating network structure (IPN) is formed.
- an organopolysiloxane component derived from the component (A) and a vinyl polymer component derived from the component (B) are chemically bonded, and further, chain transfer of reactive radicals occurs during the polymerization of the component (B), and the vinyl polymer component is grafted and chemically bonded to the organopolysiloxane chain.
- a low working temperature organic solvent of less than 100 ° C. and an aromatic organic solvent such as toluene are not substantially contained, so that a good working environment is ensured.
- each of these components has both an acidic group and a basic group
- the ratio of either one is large, after the hydrolysis / condensation reaction and the polymerization reaction, depending on the ratio of these groups It is preferable to adjust the pH by adding a basic compound or an acidic compound.
- the hydrophilic property of the obtained composite polymer particle can be improved and dispersibility can be improved.
- Examples of basic compounds used for the pH adjustment include amines such as ammonia, methylamine, dimethylamine, trimethylamine, ethylamine, diethylamine, triethylamine, ethanolamine, diethanolamine, and dimethylaminoethanol; alkalis such as caustic potash and caustic soda
- Examples of the acidic compound include inorganic acids such as hydrochloric acid, phosphoric acid, sulfuric acid, and nitric acid; formic acid, acetic acid, propionic acid, lactic acid, oxalic acid, citric acid, adipic acid, (Meth) acrylic acid, maleic acid, fumaric acid, itaconic acid and the like can be mentioned.
- the pH of the aqueous dispersion after pH adjustment is usually 6 to 10, preferably 7 to 8.
- the average particle size of the composite polymer particles is preferably 0.01 to 0.5 ⁇ m, more preferably 0.05 to 0.3 ⁇ m.
- an aqueous dispersion in which the composite polymer particles are dispersed in an aqueous medium is obtained. This aqueous dispersion is used as it is or after the concentration is adjusted to prepare the final aqueous dispersion. It is preferable to use it.
- the solid content concentration of the aqueous dispersion of composite polymer particles is usually 10 to 60% by weight, preferably 20 to 50% by weight. This solid content concentration is usually adjusted by the amount of water.
- the medium in the aqueous dispersion of composite polymer particles consists essentially of water, but in some cases, an organic solvent such as alcohol may be contained up to about several weight percent.
- an organic solvent such as alcohol may be contained up to about several weight percent.
- an organic solvent for example, one used when preparing the component (A) can be added to the aqueous dispersion of composite polymer particles as necessary.
- the (B) component in the second fluororesin of the present embodiment comprises copolymer particles of a radical polymerizable fluorine-containing monomer and a (meth) acrylic monomer and / or a fluorine-containing polymer (meta ) It consists of composite polymer particles with an acrylic polymer.
- copolymer particles of a radical polymerizable fluorine-containing monomer and a (meth) acrylic monomer are referred to as “polymer particles (i)”, and a composite of a fluorine-containing polymer and a (meth) acrylic polymer.
- the polymer particles are referred to as “polymer particles (ii)”, and the polymer particles (i) and the polymer particles (ii) are collectively referred to as “(b) polymer particles”.
- the fluorine-containing polymer in the polymer particles (ii) is a homopolymer or copolymer of a radical polymerizable fluorine-containing monomer.
- radical polymerizable fluorine-containing monomer used for a copolymer of a radical polymerizable fluorine-containing monomer and a (meth) acrylic monomer in the polymer particle (i) and a fluorine-containing polymer in the polymer particle (ii)
- fluoroolefins such as vinyl fluoride, vinylidene fluoride, tetrafluoroethyleneylene, trifluorochloroethylenelene, hexafluoropropylene, hexafluoroisobutylene, (per) fluoro (meth) acrylic acid, (per) fluoro
- fluoroolefins are preferable, vinylidene fluoride, tetrafluoroethylenelene, hexafluoropropylene, and the like are more preferable, and vinylidene fluoride is particularly preferable.
- the radical polymerizable fluorine-containing monomers can be used alone or in admixture of two or more.
- the system monomers are radically polymerizable, and examples thereof include (meth) acrylic acid esters and hydroxyl group-containing (meth) exemplified for the (B) radically polymerizable monomer in the (a) composite polymer particles.
- Acrylic esters, amino group-containing (meth) acrylic esters, polyfunctional (meth) acrylic esters, compounds similar to (meth) acrylamide or its derivatives in unsaturated amides, (meth) Acrylic acid etc. can be mentioned.
- alkyl acrylates having 4 to 12 carbon atoms in the alkyl group alkyl methacrylates having 1 to 6 carbon atoms in the alkyl group, (meth) acrylic acid, and the like are preferable.
- n-Butyl acrylate, i-butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, 2-ethylhexyl methacrylate, cyclohexyl methacrylate, (meth) acrylic acid and the like are preferable.
- the said (meth) acrylic-type monomer can be used individually or in mixture of 2 or more types.
- the copolymer of the radical polymerizable fluorine-containing monomer and the (meth) acrylic monomer in the polymer particle (i) and the fluorine-containing polymer and the (meth) acrylic polymer in the polymer particle (ii) are: Radical polymerizable monomers other than the above-described compounds (hereinafter referred to as “other radical polymerizable monomers”) can be contained.
- the other radical polymerizable monomer include the polymer particles (i) and the polymer particles (ii) among the compounds exemplified for the (B) radical polymerizable monomer in the composite polymer particles (a).
- examples include compounds other than the (meth) acrylic monomer.
- aldo group-containing unsaturated compounds, keto group-containing unsaturated compounds, and the like are preferable, and acrolein, vinyl methyl ketone, diacetone (meth) acrylamide, and the like are particularly preferable.
- the other radical polymerizable monomers can be used alone or in admixture of two or more.
- the polymer particles (ii) are preferred as the polymer particles.
- the structure of the polymer particles (ii) is a core / shell type in which a fluorine-containing polymer is used as a core and a (meth) acrylic polymer is used as a shell, and a (meth) acrylic polymer is used as a core.
- Examples include a core / shell type with a polymer shell, and a homogeneous type in which a fluorine-containing polymer and a (meth) acrylic polymer are uniformly mixed in a single particle. When importance is attached, a homogeneous type is preferable.
- the homogeneity of the polymer particles (ii) means that they are optically transparent by showing a single glass transition point in differential scanning calorimetry or when the polymer particles (ii) are formed into a film. By forming a simple film, it can be easily distinguished.
- the fluorine-containing polymer is preferably polyvinylidene fluoride, a copolymer of vinylidene fluoride and another fluoroolefin, and more preferably a vinylidene fluoride / tetrafluoroethylene copolymer.
- the said fluorine-containing polymer can be used individually or in mixture of 2 or more types.
- the content of vinylidene fluoride is usually 50% by weight or more.
- the content of each monomer is preferably 50 to 90% by weight of vinylidene fluoride and 50 to 10% by weight of tetrafluoroethylene.
- the content of each monomer is preferably 50 to 90% by weight of vinylidene fluoride, 50 to 10% by weight of hexafluoropropylene, and further vinylidene fluoride / tetrafluoroethylene
- the content of each monomer is preferably 50 to 80% by weight of vinylidene fluoride, 10 to 40% by weight of tetrafluoroethylene, and 5 to 40% by weight of hexafluoropropylene. is there.
- the weight average molecular weight of the fluorine-containing polymer is usually 100,000 to 500,000.
- the (meth) acrylic polymer is preferably an alkyl acrylate having an alkyl group having 4 to 12 carbon atoms and / or an alkyl methacrylate having an alkyl group having 1 to 6 carbon atoms and an ald group-containing polymer.
- These (meth) acrylic polymers can be used alone or in admixture of two or more.
- the content of each monomer is preferably 40 to 99.1% by weight of alkyl (meth) acrylate, more preferably 50 to 80% by weight, and an ald group-containing unsaturated compound.
- the total amount of the keto group-containing unsaturated compound is preferably 0.1 to 20% by weight, more preferably 2 to 7% by weight, and the unsaturated carboxylic acid is preferably 0 to 30% by weight, more preferably
- the amount of the radically polymerizable monomer other than these is preferably 0 to 59.9% by weight, and more preferably 0 to 30% by weight.
- the crosslinking point may be cross-linked by a hydrazine-based cross-linking agent described later. However, when it exceeds 20% by weight, the weather resistance and the warm water resistance may be lowered.
- the alkyl acrylates and the alkyl methacrylates are used in combination, the alkyl acrylates are used in an amount of 30 to 50% by weight based on the total amount of the alkyl acrylates and the alkyl methacrylates. It is preferable.
- the (meth) acrylic polymer has an aldo group and / or keto group, an alkyl acrylate and an alkyl methacrylate are used in order to make the (meth) acrylic polymer compatible with the fluorinated polymer.
- Alkyl methacrylates are preferably used in an amount of 50% by weight or more based on the total amount.
- the weight average molecular weight of the (meth) acrylic polymer is usually 50,000 to 100,000.
- a radical polymerizable monomer that gives a (meth) acrylic polymer in the presence of 100 parts by weight (in terms of solid content) of fluorine-containing polymer particles dispersed in an aqueous medium It is desirable to carry out emulsion polymerization of 20 to 500 parts by weight, preferably 40 to 300 parts by weight. If the amount of the radically polymerizable monomer used is less than 20 parts by weight, the processability (particularly film-forming property) and the adhesion to the substrate tend to decrease. On the other hand, if it exceeds 500 parts by weight, the fluorine-containing polymer is used. There is a risk that the weather resistance, chemical resistance, etc. of
- the fluorine-containing polymer used for the production of the polymer particles (ii) can be produced by an appropriate method such as emulsion polymerization, solution polymerization, precipitation polymerization, etc.
- the aqueous dispersion of the obtained fluorine-containing polymer is preferable because it can be used as it is or in the emulsion polymerization of a radical polymerizable monomer that gives a (meth) acrylic polymer by adjusting the concentration.
- the method for dispersing the fluorine-containing polymer in an aqueous medium is not particularly limited, and examples of the method include a fluorine-containing polymer. And a method of dispersing the fluorinated polymer particles obtained by precipitation polymerization in an aqueous medium.
- the average particle size in the aqueous dispersion of the fluorine-containing polymer when producing the polymer particles (ii) is preferably 0.03 to 0.3 ⁇ m, more preferably 0.03 to 0.2 ⁇ m.
- Emulsion polymerization of a radically polymerizable monomer in the presence of fluorine-containing polymer particles can be considered as one kind of seed polymerization.
- the reaction behavior is not necessarily clear, it is considered that the added radical polymerizable monomer is absorbed or adsorbed mainly in the fluorine-containing polymer particles, and the polymerization proceeds while swelling the particles.
- the reaction conditions for the emulsion polymerization are not particularly limited.
- the reaction is performed in an aqueous medium in the presence of an emulsifier and a polymerization initiator, for example, at a temperature of about 30 to 100 ° C. for about 1 to 30 hours.
- an anionic surfactant As the emulsifier, an anionic surfactant, a nonionic surfactant, a combination of an anionic surfactant and a nonionic surfactant, etc. are used.
- a surfactant can also be used.
- the anionic surfactant include higher alcohol sulfate sodium salt, alkylbenzene sulfonic acid sodium salt, succinic acid dialkyl ester sulfonic acid sodium salt, alkyl diphenyl ether disulfonic acid sodium salt, polyoxyethylene alkyl ether sodium sulfate salt, Examples include sodium polyoxyethylene alkylphenyl ether sulfate.
- sodium lauryl sulfate, sodium dodecylbenzenesulfonate, sodium polyoxyethylene alkyl ether sulfate, sodium polyoxyethylene alkylphenyl ether sulfate and the like are preferable.
- nonionic surfactant examples include polyoxyethylene alkyl ether, polyoxyethylene alkyl aryl ether, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, etc. Ethylene nonyl phenyl ether, polyoxyethylene octyl phenyl ether and the like are used.
- amphoteric surfactant examples include lauryl betaine, hydroxyethyl imidazoline sulfate sodium salt, imidazoline sulfonate sodium salt and the like.
- cationic surfactant examples include alkylpyridinium chloride, alkyltrimethylammonium chloride, dialkyldimethylammonium chloride, and alkyldimethylbenzylammonium chloride.
- a fluorosurfactant such as perfluoroalkyl carboxylate, perfluoroalkyl sulfonate, perfluoroalkyl phosphate ester, perfluoroalkyl polyoxyethylene, perfluoroalkyl betaine can be used. .
- reactive emulsifiers that can be copolymerized with radically polymerizable monomers, such as sodium styrene sulfonate, sodium allyl alkyl sulfonate, polyoxyethylene alkyl allyl phenyl ether ammonium sulfate, polyoxyethylene Alkyl allyl phenyl ether can be used, and in particular, 2- (1-allyl) -4-nonylphenoxypolyethylene glycol sulfate ammonium salt and 2- (1-allyl) -4-nonylphenoxypolyethylene glycol are used in combination. It is preferable to do.
- the amount of the emulsifier is usually 0.05 to 5 parts by weight with respect to 100 parts by weight of the total amount of the fluorine-containing polymer particles and the radical polymerizable monomer.
- polymerization initiator examples include water-soluble polymerization initiators such as potassium persulfate, ammonium persulfate, and hydrogen peroxide, and redox systems in which these water-soluble polymerization initiators and reducing agents are combined.
- water-soluble polymerization initiators such as potassium persulfate, ammonium persulfate, and hydrogen peroxide
- redox systems in which these water-soluble polymerization initiators and reducing agents are combined.
- reducing agent examples include sodium pyrobisulfite, sodium bisulfite, sodium sulfite, sodium thiosulfate, L-ascorbic acid or a salt thereof, sodium formaldehyde sulfoxylate, ferrous sulfate, glucose and the like. . These reducing agents can be used alone or in admixture of two or more.
- an oil-soluble polymerization initiator can also be used by dissolving in a radical polymerizable monomer or solvent.
- the oil-soluble polymerization initiator include 2,2′-azobisisobutyronitrile, 2,2′-azobis (4-methoxy-2,4-dimethylvaleronitrile), 2,2′-azobis- 2,4-dimethylvaleronitrile, 1,1'-azobiscyclohexane-1-carbonitrile, 2,2'-azobisisovaleronitrile, 2,2'-azobisisocapronitrile, 2,2'- Azobis (phenylisobutyronitrile), benzoyl peroxide, di-t-butyl peroxide, dilauroyl peroxide, cumene hydroperoxide, diisopropylbenzene hydroperoxide, paramentane hydroperoxide, t-butyl hydroperoxide, 3,5,5-trimethylhexanol peroxide, t-but
- the water-soluble polymerization initiator and the oil-soluble polymerization initiator can be used alone or in admixture of two or more, and the water-soluble polymerization initiator and the oil-soluble polymerization initiator are oil-soluble.
- a polymerization initiator can also be used in combination.
- the amount of the polymerization initiator used is usually 0.1 to 3 parts by weight based on 100 parts by weight of the radical polymerizable monomer.
- chain transfer agent examples include halogenated hydrocarbons such as carbon tetrachloride, chloroform and bromoform; mercaptans such as n-dodecyl mercaptan, t-dodecyl mercaptan, n-octyl mercaptan and n-hexadecyl mercaptan.
- halogenated hydrocarbons such as carbon tetrachloride, chloroform and bromoform
- mercaptans such as n-dodecyl mercaptan, t-dodecyl mercaptan, n-octyl mercaptan and n-hexadecyl mercaptan.
- Xanthogens such as dimethylxanthogen disulfide, diethylxanthogen disulfide, and diisopropylxanthogen disulfide
- tempens such as dipent
- Examples of the chelating agent include glycine, alanine, and ethylenediaminetetraacetic acid
- examples of the pH adjusting agent include sodium carbonate, potassium carbonate, sodium bicarbonate, and ammonia. These chelating agents and pH adjusting agents can be used alone or in admixture of two or more.
- the amount of the chelating agent and pH adjuster used is usually 0 to 0.1 parts by weight and 0 to 3 parts by weight, respectively, with respect to 100 parts by weight of the radical polymerizable monomer.
- Examples of the solvent used when using an oil-soluble polymerization initiator include methyl ethyl ketone, acetone, trichlorotrifluoroethane, methyl isobutyl ketone, dimethyl sulfoxide, toluene, dibutyl phthalate, methyl pyrrolidone, and ethyl acetate. . These solvents can be used alone or in admixture of two or more.
- the amount of the solvent used is preferably a small amount within a range that does not impair workability, disaster prevention safety, environmental safety and production safety, and is usually 0 to 100 parts by weight based on the total of 100 parts by weight of radical polymerizable monomers. About 20 parts by weight.
- the fluorine-containing polymer particles and the radical polymerizable monomer can be added by various methods. For example, 1) a method in which the entire amount of the radical polymerizable monomer is added to the aqueous dispersion of fluorine-containing polymer particles at once, and 2) a radical in the aqueous dispersion of fluorine-containing polymer particles. A method in which a part of the polymerizable monomer is charged and reacted, and then the remaining radically polymerizable monomer is charged continuously or dividedly. 3) The entire amount of the radically polymerizable monomer is continuously added to the aqueous dispersion of fluorine-containing polymer particles.
- a method of adding in divided portions 4) a method of adding fluorine-containing polymer particles continuously or in divided portions at the time of emulsion polymerization of the radical polymerizable monomer in an aqueous medium, and the like can be mentioned.
- the amount of the radical polymerizable monomer initially charged in the aqueous dispersion of fluorine-containing polymer particles is 50% by weight or more of the total. The method is preferred.
- the average particle size of the polymer particles (ii) obtained by emulsion polymerization of radically polymerizable monomers in the presence of such fluorine-containing polymer particles is usually 0.06 to 3 ⁇ m, preferably 0.05 to The thickness is 0.5 ⁇ m, more preferably 0.05 to 0.3 ⁇ m.
- the average particle size is less than 0.04 ⁇ m, the viscosity of the aqueous dispersion increases, making it difficult to obtain a high solid content, resulting in a decrease in productivity, and a large mechanical shearing force acting depending on use conditions. In some cases, a solidified product tends to be easily generated.
- the average particle diameter of the polymer particles (ii) can be easily adjusted by appropriately selecting the size of the fluorine-containing polymer particles.
- the polymer particles (i) can also be produced in the same manner as the method for producing the aqueous dispersion of polymer particles (ii) as described above.
- the solid content concentration of the aqueous dispersion of polymer particles is usually 10 to 60% by weight, preferably 20 to 50% by weight. This solid content concentration is usually adjusted by the amount of water.
- the medium in the aqueous dispersion of polymer particles consists essentially of water, but in some cases, an organic solvent such as alcohol may be contained up to about several weight percent.
- the aqueous dispersion in the second fluororesin of the present embodiment contains (a) composite polymer particles and (b) polymer particles.
- the ratio of (a) composite polymer particles to (b) polymer particles in the aqueous dispersion of this embodiment is usually 90/10 to 10/90, preferably 80/20 to 20/80, more preferably. 70/30 to 30/70, particularly preferably 60/40 to 40/60.
- the total concentration of the (a) composite polymer particles and the (b) polymer particles in the second fluororesin aqueous dispersion of the present embodiment is usually 10 to 60% by weight, preferably 30 to 50% by weight. It is.
- the second fluororesin of the present embodiment in the coating film formed using the second fluororesin as a coating agent, water is further added to the previously formed water droplets at a constant flow rate to expand the water droplets.
- the dynamic contact angle of water expansion method
- (b) increases to 100 ° or more
- (a) has a small change width of 95 ° or less, for example, under conditions where water is continuously applied like rain
- (a) Second of the present embodiment
- This fluororesin corresponds to the fact that the surface of the membrane is easily wetted and spreads by water and the surface is easily washed. Table 2 shows the general physical properties of the second fluororesin of this embodiment.
- Additives for the second fluororesin include film-forming aids, antifreeze agents, pigments, fillers, pigment dispersants, antifoaming agents, leveling agents, rheology modifiers, preservatives, UV absorbers as necessary Antioxidants, matting agents, lubricants, vulcanizing agents and the like can also be added.
- the non-combustible sheet 1 in the present embodiment has a heat shielding property that seems to be caused by titanium oxide or the like in the resin layer 3, can exhibit high weather resistance derived from fluorine and silicon, and is hydrophobic and hydrophilic on the surface.
- the retention rate of heat insulation performance can be improved by contamination resistance, and the film formation temperature is kept at room temperature by containing acrylic
- acrylic As a water-based resin that does not use a solvent and does not use a solvent and can be produced only by a drying process, the environmental impact can be reduced.
- first and second fluororesins were prepared, and diluted with water as necessary to prepare a plurality of fluororesin liquids so as to have respective viscosities.
- First fluororesin Zeffle thermal barrier paint white (fluorine acrylic emulsion manufactured by Daikin Industries, Ltd.) comprising 20 parts by weight of vinylidene fluoride copolymer, 10 parts by weight of acrylic copolymer and 20 parts by weight of titanium oxide
- Second fluororesin Schiff Clear (vinyl acrylic emulsion made by JSR Corporation) in which vinylidene fluoride polymer and acrylic polymer are compatible at the molecular level Moreover, in Table 3, these compounding ratios were represented by numerical values.
- the glass cloth (glass fiber) is indicated by a glass fiber product number manufactured by Arisawa Manufacturing Co., Ltd. in the table. These have a thickness of about 0.1 to 0.19 ⁇ m and a mass per unit area of about 100 to 220 g / m 2 .
- a glass cloth having a yarn (yarn) diameter of about 7 ⁇ m or 9 ⁇ m, a longitudinal density of 62/25 mm, a lateral density of 58/25 mm, and a thickness of 0.1 mm and a mass of 108.5 g / cm 3 (Arisawa Manufacturing Co., Ltd.) Manufactured by "1031NT" etc., and infiltrating the fluororesin liquid in the impregnation tank at a line speed of 10 m / min while maintaining the tension at 3 Kg / Cm 2 by an inline inline layout as shown in FIG.
- the viscosity was based on the viscosity measuring method of JISZ8803 liquid.
- Thickness was measured at the intersection of the base fabric fiber yarns in accordance with the technical standards for buildings and membrane materials with membrane structures and the method described in “Other Quality Standards”.
- a JISB7503 standard name dial gauge was used as a measuring apparatus.
- 12% by weight of ultrafine particulate anhydrous silica powder (Aerosil MOX80 manufactured by Nippon Aerosil Co., Ltd., average particle size 30 m ⁇ m) in an aqueous dispersion was 20% by weight of polyoxyalkylenedimethylpolysiloxane based on the weight of the silica powder.
- This mixed solution is brushed on one side of a fluorine-containing resin tent film (FGT-600 manufactured by Chuko Kogyo Co., Ltd., impregnated with PTFE into a 3 ⁇ m diameter glass fiber woven fabric), dried at room temperature, and then fired at 360 ° C. for 10 minutes. Then, a hydrophilic layer was formed on the surface of the fluorine-containing resin tent film.
- the coating amount and thickness are shown in Table 2.
- ⁇ Weather resistance> A long-term weather resistance test using a metal weather manufactured by Daipura Wintes was conducted. Test conditions are as follows: illumination 65 mW / cm 2 , black panel temperature 53 ° C., LIGHT irradiation condition (53 ° C./70% RH / 20 hours), DEW condensation conditions (30 ° C./98% RH / 4 hours), LIGHT One cycle of 30 seconds shower is 24 hours. The test was conducted for 408 hours, and then visually evaluated for any significant discoloration or damage.
- the non-combustible sheet of the present invention can improve weather resistance, heat shielding properties, hydrophilicity, non-combustibility, chemical resistance, flexibility, handling properties, and surface printing goodness.
- Examples of use of the present invention include various tents, warehouse tents, roofing materials, ceiling materials, simple dome for entertainment facilities, sports facilities, dome stadiums, agricultural / flowerbed houses, school / park facilities, transport hood sheets, etc. There are a wide range of uses.
- Non-combustible sheet 2 ...
- Non-combustible fiber woven fabric 3 ... Resin layer
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Laminated Bodies (AREA)
- Tents Or Canopies (AREA)
- Reinforced Plastic Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
本願は、2014年05月16日に、日本に出願された特願2014-102857号に基づき優先権を主張し、その内容をここに援用する。
1.耐候性、遮熱性、親水性、不燃性、耐薬品性、柔軟性、ハンドリング性の維持または向上を図ること。
2.製造コストの削減を図ること。
フッ化ビニリデン共重合物とアクリル共重合物とを有する第1のフッ素樹脂を少なくとも含む樹脂層が形成されてなることにより上記課題を解決した。
本発明の前記樹脂層が、フッ化ビニリデン系ポリマーとシロキサン系ポリマーと架橋型アクリルポリマーとを有する第2のフッ素樹脂を含むことが好ましい。
本発明は、前記第1のフッ素樹脂が酸化チタンを含むことができる。
本発明において、厚さが100~200μm程度であることがより好ましい。
本発明の不燃シートの製造方法には、不燃繊維からなる織布を、
フッ化ビニリデン共重合物とアクリル共重合物と水とを有する第1のフッ素樹脂を少なくとも含む樹脂に含浸させて樹脂層を形成することが可能である。
本発明の前記樹脂が、フッ化ビニリデン系ポリマーとシロキサン系ポリマーと架橋型アクリルポリマーとを有する第2のフッ素樹脂を含むことが好ましい。
本発明は、前記第1のフッ素樹脂が酸化チタンを含むことができる。
また、本発明において、厚さが100~200μm程度である手段を採用することもできる。
フッ化ビニリデン共重合物とアクリル共重合物と水と酸化チタンとを有する第1のフッ素樹脂と、
フッ化ビニリデン系ポリマーとシロキサン系ポリマーと架橋型アクリルポリマーとを有する第2のフッ素樹脂と、
を少なくとも含む樹脂層が形成されてなることにより、フッ素系樹脂とすることで不燃性を確保し、アクリル系樹脂を含有するエマルジョンとすることで、塗工での製造を可能とし、水を飛ばす程度の乾燥工程によって焼成することなく製造を可能とすることができる。これにより、製造にかかるコスト、エネルギーを大幅に低減することができる。
さらに、耐候性、遮熱性、親水性、不燃性、耐薬品性、柔軟性、ハンドリング性、表面印刷良好性を改善することができる。
また、本発明においては、第1のフッ素樹脂と第2のフッ素樹脂との配合比は0~1、つまり、第1のフッ素樹脂または第2のフッ素樹脂が0となる比率での配合されて、含有するフッ素樹脂として、第1のフッ素樹脂のみ、または、第2のフッ素樹脂のみとされた状態をも含むものとされる。
また、第1のフッ素樹脂において、酸化チタンに関しても含まないことができる。
フッ化ビニリデン共重合物とアクリル共重合物と水と酸化チタンとを有する第1のフッ素樹脂と、
フッ化ビニリデン系ポリマーとシロキサン系ポリマーと架橋型アクリルポリマーとを有する第2のフッ素樹脂と、
を少なくとも含む樹脂に含浸させて樹脂層を形成することにより、フッ素系樹脂とすることで不燃性を確保し、アクリル系樹脂を含有するエマルジョンとすることで、塗工での製造を可能とし、水を飛ばす程度の乾燥工程によって焼成することなく製造を可能とすることができる。これにより、製造にかかる工程数を削減し、製造時間を短縮し、製造装置にかかるコストを低減して、製造コストおよび必要なエネルギーを大幅に低減することができる。さらに、耐候性、遮熱性、親水性、不燃性、耐薬品性、柔軟性、ハンドリング性、表面印刷良好性を改善することができる。
本発明においては、テンションをかけた不燃繊維からなる長尺の織布を連続的に供給しながら上記のフッ素樹脂に含浸した後、その両面でドクターブレード等によって掻き取り、乾燥することで、容易に不燃シートを製造することができる。
図1は、本実施形態における不燃シートを示す断面図であり、図において、符号1は、不燃シートである。
樹脂層3を形成した不燃シート1は、厚さが100~200μm程度となるように設定される。
不燃シート製造装置10は、図1に示すように、基材である不燃繊維織布12を送り出す送出しロール11と、送出しロール11の下流側に、フッ素樹脂13を満たした含浸槽114が配置され、送出しロール11に巻かれた不燃繊維織布2は、テンションロール15を介して供給され、ロール15aを経て含浸槽14のフッ素樹脂13内に配置されたロール15b側に送られ、不燃繊維織布2にフッ素樹脂13が塗布される。含浸槽14の上方側には一対のドクターブレード16が配置され、余分のフッ素樹脂13が掻きとられる。ドクターブレード16の上方側には、余分な水分を飛ばす処理温度が設定可能な乾燥部17が設けられている。
なお、塗布量の制御は、テンションロール15によるガラス繊維織布12への張力と、フッ素樹脂液13の粘度、およびドクターブレード16の角度によって制御することができる。
第1のフッ素樹脂として、フッ化ビニリデン共重合物とアクリル共重合物と酸化チタンとを有するものを用意する。この際、水、または、含水ケイ酸を含んでいてもよい。
第2のフッ素樹脂として、フッ化ビニリデン系ポリマーとシロキサン系ポリマーと架橋型アクリルポリマーとを有するものを用意する。
これらを例えば、1:1とされる所定の比率で調整し、これを水で薄めて所定の粘度(例えば1500cps)とし含浸槽14に充填する。
含む単量体を水性分散重合して含フッ素重合体(A)粒子の水性分散液を製造する工程(I)、および
該含フッ素重合体(A)粒子の水性分散液中でエチレン性不飽和単量体を含フッ素重合体(A)粒子にシード重合して含フッ素シード重合体(B)粒子の水性分散液を製造する工程(II)
を含む製造方法により製造される。
CH2=CHCH2-O-R (1)
(式中、Rは酸素原子、窒素原子および/または極性基を有していてもよい炭化水素基)で示される化合物(1)の存在下に少なくとも1種のフルオロオレフィンを含む単量体を水性分散重合して含フッ素重合体(A)粒子の水性分散液を製造する。
Rが式(2):
で示される化合物(2)、
Rが式(3):
-(AO)p-X (3)
(式中、AOは炭素数2~4の直鎖状または分岐鎖状のオキシアルキレン基;pは正の整数;XはHまたはSO3Y(YはNH4またはアルカリ金属原子、たとえばNa、K);AOが複数個存在する場合は同一でも互いに異なっていてもよく、また、2種以上のブロック構造を形成していてもよい)
で示される化合物(3)、または
Rが式(4):
CH2=CR1-R2-O-(AO)p-X
(式中、R1は水素原子またはアルキル基;R2は炭素数2以上のアルキレン基;AOは炭素数2~4の直鎖状または分岐鎖状のオキシアルキレン基;pは正の整数;XはHまたはSO3Y(YはNH4またはアルカリ金属原子);AOが複数個存在する場合は同一でも互いに異なっていてもよく、また、2種以上のブロック構造を形成していてもよい)で示される化合物が好ましい。
CH2=CR3-R4-O-(BO)m-(EO)n-X
(式中、R3は炭素数1~10のアルキル基;R4は炭素数2~10の直鎖状のアルキレン基;Xは式(1)と同じ;BOはブチレンオキサイド単位;EOはCH2CH2OまたはCH(CH3)O単位;mは0~50の整数;nは0~100の整数;m+nは0~150の整数)で示される化合物であることが好ましい。
CH2=C(CH3)CH2CH2-O-(BO)m-(EO)n-H、
CH2=C(CH3)CH2CH2-O-(BO)m-(EO)n-SO3NH4、
(式中、BO、EO、nおよびmは前記と同じ)で示される化合物が好ましい。
本発明の製造方法で重合するフルオロオレフィンは特に限定されず、1種または2種以上が使用できる。フルオロオレフィンとしては、たとえばテトラフルオロエチレン(TFE)、ヘキサフルオロプロピレン(HFP)、パーフルオロ(アルキルビニルエーテル)(PAVE)、
PAVEとしてはパーフルオロ(メチルビニルエーテル)(PMVE)、パーフルオロ(エチルビニルエーテル)(PEVE)、パーフルオロ(プロピルビニルエーテル)(PPVE)などがあげられる。
CX1 2=CX2-(Rf)m-Y1 (5)
(式中、Y1は-OH、-COOH、-SO2F、-SO3M2(M2は水素原子、NH4基またはアルカリ金属)、アルコキシカルボニル基、カルボン酸塩、カルボキシエステル基、エポキシ基またはシアノ基;X1およびX2は同じかまたは異なりいずれも水素原子またはフッ素原子;Rfは炭素数1~40の2価の含フッ素アルキレン基または炭素数1~40のエーテル結合を含有する2価の含フッ素アルキレン基;mは0または1)で示される化合物があげられる。
他の界面活性剤としては含フッ素界面活性剤でも非フッ素(炭化水素)界面活性剤(ただし、前記式(1)の化合物は除く)でもよい。
工程(II)では、工程(I)で得られた含フッ素重合体(A)粒子の水性分散液をそのまま、または水で希釈し粒子数を調整した水性分散液中でエチレン性不飽和単量体を含フッ素重合体(A)粒子にシード重合する。
測定装置:HONEYWELL社製のマイクロトラックUPA
測定方法:動的光散乱法
測定する乳濁液を純水で計測可能な濃度に希釈して試料とし、室温にて測定を行う。得られたデータの個数平均径を粒子径とする。
計算方法:(1)で求めた平均粒子径と固形分含有量から、重合体比重を1.8として計算する。
NMR測定装置:VARIAN社製
1H-NMR測定条件:400MHz(テトラメチルシラン=0ppm)
19F-NMR測定条件:376MHz(トリクロロフルオロメタン=0ppm)
昭和電工製Shodex GPC-104を使用し、標準ポリスチレン換算の重量平均分子量および数平均分子量を求めた。
測定条件
キャリア:テトラヒドロフラン
流速:0.6ml/min
カラム温度:40℃
試料:測定する樹脂の3%THF溶液
安田精機製作所社製Dyniscoメルトインデックステスターを用い、約6gの樹脂を250℃±0.5℃に保たれた0.376インチIDシリンダーに投入し、5分間放置して温度が平衡状態に達した後、10Kgのピストン荷重のもとで直径0.0825インチ、長さ0.315インチのオリフィスを通して押し出した同時期に採取する3回の平均値とした。単位はg/10分。
被験塗板を23℃で1日間乾燥した後、23℃の水1kgに被験塗板2枚を3日間浸漬し、浸漬した水を100mlのガラス瓶に50g秤取り、手で上下に50回振り混ぜ、直後および30分後の液面からの泡の高さを測定する。
被験塗板を23℃で7日間乾燥した後、JIS K5600-6-2に従って60℃の水中に7日間浸漬し、その後23℃で1日間乾燥し、膨れ(JIS K5600-8-2)、割れ(JIS K5600-8-4)、はがれ(JIS K5600-8-5)の等級を評価する。
密度を0~5の等級(小さい方が0)に、大きさをS1~S5の等級(S1の方が小さい)に分け、たとえば2(S1)のように記載する。
密度を0~5の等級(小さい方が0)に、大きさをS0~S5の等級(S0の方が小さい)に、深さをa~cの等級(aの方が浅い)に分け、たとえば2(S1)bのように記載する。
密度を0~5の等級(小さい方が0)に、大きさをS1~S5の等級(S1の方が小さい)に、深さをa~bの等級(aの方が浅い)に分け、たとえば2(S1)aのように記載する。
被験塗板を23℃で7日間乾燥した後、-20℃の空気中に2時間静置し、その後10℃の水中に2時間浸漬する。このサイクルを100回繰り返した後、23℃で1日間乾燥し、耐温水性試験と同様に、膨れ(JIS K5600-8-2)、割れ(JIS K5600-8-4)、はがれ(JIS K5600-8-5)の等級を評価する。
JIS 5663 7.7.3に従って試験板を5±1℃で4時間乾燥した後、さらに5±2℃で16時間水中に浸漬し、その後5±1℃で3時間乾燥し、膨れ(JIS 5600-8-2)、割れ(JIS 5600-8-4)、はがれ(JIS 5600-8-5)の等級を評価する。
JIS K5600-4-7に従い、変角光沢計(日本電色工業(株)VGS(商品名))を用いて被験塗板の表面光沢を測定する。
工程(I)
2Lのステンレススチール製のオートクレーブに、イオン交換水500g、パーフルオロヘキサン酸アンモニウム(C6)の50質量%水溶液2.2g(パーフルオロヘキサン酸アンモニウムの濃度2200ppm/水。重合溶媒としての水。以下同様)、式(2-1):
工程(I)で得られた含フッ素重合体(A-1)粒子の水性分散液(固形分濃度46.2質量%)2409.3gに式(2-1)の化合物43.94g(12900ppm/水)を加えて充分に混合して水性分散液を調製した。
工程(I)
2Lのステンレススチール製のオートクレーブに、イオン交換水500g、式(2-1):
工程(I)で得られた含フッ素重合体(A-2)粒子の水性分散液(固形分濃度46.2質量%)2409.3gに式(2-1)の化合物43.94g(12900ppm/水)を加えて充分に混合して水性分散液を調製した。
工程(I)
2Lのステンレススチール製のオートクレーブに、イオン交換水500g、パーフルオロオクタン酸アンモニウム(C8)50%水溶液0.5g(パーフルオロオクタン酸アンモニウムの濃度1000ppm/水)とモノステアリン酸ポリエチレングリコール(日光ケミカルズ(株)製のMYS-40(商品名))0.75g(150ppm/水)を仕込み、系内を窒素ガスで充分に置換後、減圧にした。続いて重合槽内を系内圧力が1.00~1.10MPaとなるようにVdF/TFE/CTFE(=74/14/12モル%)混合単量体を圧入し、60℃に昇温した。
工程(I)で得られた含フッ素重合体(A-3)粒子の水性分散液(固形分濃度46.2質量%)2409.3gに式(2-1)の化合物43.94g(12900ppm/水)を加えて充分に混合して水性分散液を調製した。
例1~3でそれぞれ製造した含フッ素シード重合体(B)の水性分散液をそのまま用い、かつ、以下の処方で建築用の耐候性水性塗料組成物(白塗料組成物)を調製した。
含フッ素シード重合体(B)の水性分散液 65.00質量部
水 9.12質量部
酸化チタン 31.39質量部
顔料分散剤 2.35質量部
凍結防止剤 1.79質量部
pH調整剤 0.04質量部
消泡剤 0.11質量部
増粘剤1 0.38質量部
増粘剤2 0.40質量部
造膜助剤 2.35質量部
酸化チタン:石原産業(株)製タイペークCR-97(商品名)
顔料分散剤:サンノプコ(株)製ノプコスパースSN-5027(商品名)
凍結防止剤:エチレングリコール
pH調整剤:アンモニア水
消泡剤:ダウコーニング社製FSアンチフォーム013A(商品名)
増粘剤1:旭電化工業(株)製アデカノールUH-420(商品名)
増粘剤2:ローム・アンド・ハーツ・ジャパン(株)製プライマルASE-60(商品名)
造膜助剤:アジピン酸ジエチル
(A):下記一般式(3-1)で表されるオルガノシラン、該オルガノシランの加水分解物および該加水分解物の部分縮合物の群から選ばれる少なくとも1種。
-(A)成分-
本発明に用いられる(A)成分は、前記一般式(1)で表されるオルガノシラン(以下、「オルガノシラン(1)」という。)、オルガノシラン(1)の加水分解物および該加水分解物の縮合物との群から選ばれる少なくとも1種からなる。
置換基中の炭素原子を含めて8以下である。
t-ブチル基、n-ペンチル基等を挙げることができ、炭素数1~6のアシル基としては、例えば、アセチル基、プロピオニル基、ブチリル基、バレリル基、カプロイル基等を挙げることができる。
前記オルガノシラン(1)は、単独でまたは2種以上を混合して使用することができる。
また、(A)成分におけるオルガノシラン(1)の加水分解物の部分縮合物(以下、単に「部分縮合物」という。)は、該加水分解物中のシラノール基が縮合してシロキサン(Si-O-Si)結合を形成したものであるが、本発明では、これらの基がすべて縮合している必要はなく、一部の基のみが縮合したものや、異なる縮合度のものの混合物をも包含する概念である。
この場合の水の使用量は、オルガノシラン(1)1モルに対して、通常、1.2~3.0モル、好ましくは1.3~2.0モル程度である。
これらの有機溶剤のうち、アルコール類の具体例としては、メタノール、エタノール、n-プロピルアルコール、i-プロピルアルコール、n-ブチルアルコール、sec-ブチルアルコール、t-ブチルアルコール、n-ヘキシルアルコール、n-オクチルアルコール、エチレングリコール、ジエチレングリコール、トリエチレングリコール、エチレングリコールモノ-n-ブチルエーテル、エチレングリコールモノエチルエーテルアセテート、ジエチレングリコールモノエチルエーテル、プロピレングリコールモノメチルエーテル、プロピレンモノメチルエーテルアセテート、ジアセトンアルコール等を挙げることができる。
これらの有機溶剤は、単独でまたは2種以上を混合して使用することができる。
なお、部分縮合物中に有機溶剤を含む場合には、後述する縮合・重合反応に先立って、該有機溶媒を除去しておくこともできる。
ここで、前記「完全加水分解縮合物」とは、オルガノシラン(1)中のSi-OR2基が100%加水分解してシラノール基となり、さらに完全に縮合してシロキサン結合を形成したものをいう。
本実施形態の台2のフッ素樹脂に用いられるラジカル重合性モノマーは、ラジカル重合が可能である限り特に限定されるものではない。
ラジカル重合性モノマーとしては、例えば、メチル(メタ)アクリレート、エチル(メタ)アクリレート、n-プロピル(メタ)アクリレート、i-プロピル(メタ)アクリレート、n-ブチル(メタ)アクリレート、i-ブチル(メタ)アクリレート、sec-ブチル(メタ)アクリレート、t-ブチル(メタ)アクリレート、n-アミル(メタ)アクリレート、i-アミル(メタ)アクリレート、n-へキシル(メタ)アクリレート、n-オクチル(メタ)アクリレート、2-エチルへキシル(メタ)アクリレート、n-デシル(メタ)アクリレート、n-ドデシル(メタ)アクリレート、ラウリル(メタ)アクリレート、シクロヘキシル(メタ)アクリレート、p-t-ブチルシクロヘキシル(メタ)アクリレート、フェニル(メタ)アクリレート、ベンジル(メタ)アクリレート等の(メタ)アクリル酸エステル類;
2-アミノエチル(メタ)アクリレート、2-ジメチルアミノエチル(メタ)アクリレート、2-アミノプロピル(メタ)アクリレート、2-ジメチルアミノプロピル(メタ)アクリレート、3-アミノプロピル(メタ)アクリレート、3-ジメチルアミノプロピル(メタ)アクリレート等のアミノ基含有(メタ)アクリルエステル類;
グリシジル(メタ)アクリレート、2-(3,4-エポキシシクロヘキシル)エチル(メタ)アクリレート、アリルグリシジルエーテル等のエポキシ基含有不飽和化合物;
トリフルオロエチル(メタ)アクリレート、ペンタデカフルオロ-n-オクチル(メタ)アクリレート等の含フッ素(メタ)アクリル酸エステル類;
)アクリレート、1,6-ヘキサンジオールジ(メタ)アクリレート、グリセロールトリ(メタ)アクリレート、トリメチロールプロパントリ(メタ)アクリレート、ペンタエリスリトールテトラ(メタ)アクリレート、ポリエチレングリコールジ(メタ)アクリレート、ポリプロピレングリコールジ(メタ)アクリレート、エチレンオキサイド/プロピレンオキサイドランダム共重合体のジ(メタ)アクリレート、エチレンオキサイド/プロピレンオキサイドブロック共重合体のジ(メタ)アクリレート等の多官能性(メタ)アクリル酸エステル類;
無水マレイン酸、無水イタコン酸等の不飽和カルボン酸無水物類;
スチレン、α-メチルスチレン、2-メチルスチレン、3-メチルスチレン、4-メチルスチレン、3,4-ジメチルスチレン、4-エチルスチレン、3,4-ジエチルスチレン、4-t-ブチルスチレン、4-メトキシスチレン、4-エトキシスチレン、4-ヒドロキシメチルスチレン、2-クロロスチレン、3-クロロスチレン、4-クロロ-3-メチルスチレン、2,4-ジクロロスチレン、2,6-ジクロロスチレン、1-ビニルナフタレン、ジビニルベンゼン等の芳香族ビニル化合物;
(メタ)アクリルアミド、N-メチル(メタ)アクリルアミド、N,N-ジメチル(メタ)アクリルアミド、N-メチロール(メタ)アクリルアミド、N-メトキシメチル(メタ)アクリルアミド、N-n-ブトキシメチル(メタ)アクリルアミド、N,N’-メチレンビス(メタ)アクリルアミド、マレイン酸アミド等の不飽和アミド化合物;
(メタ)アクリロニトリル、α-クロロアクリロニトリル等のシアン化ビニル化合物;1,1,1-トリメチルアミン(メタ)アクリルイミド、1-メチル-1-エチルアミン(メタ)アクリルイミド、1,1-ジメチル-1-(2-ヒドロキシプロピル)アミン(メタ)アクリルイミド、1,1-ジメチル-1-(2-フェニル-2-ヒドロキシエチル)アミン(メタ)アクリルイミド、1,1-ジメチル-1-(2-ヒドロキシ-2-フェノキシプロピル)アミン(メタ)アクリルイミド等のアミンイミド基含有ビニル系化合物;
エチルビニルエーテル、2-ヒドロキシエチルビニルエーテル、2-アミノエチルビニルエーテル、アリルグリシジルエーテル等の不飽和エーテル化合物;(メタ)アクロレイン、クロトンアルデヒド、ホルミルスチレン、ホルミル-α-メチルスチレン、(メタ)アクリルアミドピバリンアルデヒド、3-(メタ)アクリルアミドメチル-アニスアルデヒド、下記一般式(3-2)
ジアセトン(メタ)アクリルアミド、炭素数4~7のビニルアルキルケトン類(例えば、ビニルメチルケトン、ビニルエチルケトン、ビニル-n-プロピルケトン、ビニル-i-プロピルケトン、ビニル-n-ブチルケトン、ビニル-i-ブチルケトン、ビニル-t-ブチルケトン等)、ビニルフェニルケトン、ビニルベンジルケトン、ジビニルケトン、ジアセトン(メタ)アクリレート、アセトニトリル(メタ)アクリレート、2-ヒドロキシプロピル(メタ)アクリレート-アセチルアセテート、3-ヒドロキシプロピル(メタ)アクリレート-アセチルアセテート、2-ヒドロキシブチル(メタ)アクリレート-アセチルアセテート、3-ヒドロキシブチル(メタ)アクリレート-アセチルアセテート、4-ヒドロキシブチル(メタ)アクリレート-アセチルアセテート、ブタンジオール-1,4-(メタ)アクリレート-アセチルアセテート等のケト基含有不飽和化合物;
1,3-ブタジエン、イソプレン、クロロプレン等の共役ジエン類;
ジカプロラクトンや、
CH2=CHSi(CH3)Cl2、CH2=CHSiCl3、
CH2=CHCOO(CH2)2Si(CH3)(OCH3)2、
CH2=CHCOO(CH2)2Si(OCH3)3、
CH2=CHCOO(CH2)3Si(CH3)(OCH3)2、
CH2=CHCOO(CH2)3Si(OCH3)3、
CH2=CHCOO(CH2)2Si(CH3)Cl2、
CH2=CHCOO(CH2)2SiCl3、
CH2=CHCOO(CH2)3Si(CH3)Cl2、
CH2=CHCOO(CH2)3SiCl3、
CH2=C(CH3)COO(CH2)2Si(CH3)(OCH3)2、
CH2=C(CH3)COO(CH2)2Si(OCH3)3、
CH2=C(CH3)COO(CH2)3Si(CH3)(OCH3)2、
CH2=C(CH3)COO(CH2)3Si(OCH3)3、
CH2=C(CH3)COO(CH2)2Si(CH3)Cl2、
CH2=C(CH3)COO(CH2)2SiCl3、
CH2=C(CH3)COO(CH2)3Si(CH3)Cl2、
CH2=C(CH3)COO(CH2)3SiCl3
等のシロキサン結合を形成し得る基を有するラジカル重合性モノマー
等を挙げることができる。
乳化剤としては、例えば、陰イオン性界面活性剤、非イオン性界面活性剤、陽イオン性界面活性剤、両性界面活性剤や水溶性重合体等のいずれでも使用可能である。
前記陰イオン性界面活性剤としては、例えば、高級アルコール硫酸エステルのアルカリ金属塩、アルキルベンゼンスルホン酸のアルカリ金属塩、コハク酸ジアルキルエステルスルホン酸のアルカリ金属塩、アルキルジフェニルエーテルジスルホン酸のアルカリ金属塩、ポリオキシエチレンアルキルエーテルの硫酸エステル塩、ポリオキシエチレンアルキルフェニルエーテルの硫酸エステル塩、ポリオキシエチレンアルキルエーテルのリン酸エステル塩、ポリオキシエチレンアルキルフェニルエーテルのリン酸エステル塩等のほか、以下商品名で、ラテムルS-180A(花王(株)製)、エレミノールJS-2(三洋化成(株)製)、アクアロンHS-10(第一工業製薬(株)製)、アデカリアソープSE-10N(旭電化工業(株)製)等の反応性の陰イオン性界面活性剤を挙げることができる。
また、前記陽イオン性界面活性剤としては、例えば、アルキルピリジニルクロライド類、アルキルアミンアセテート類、アルキルアンモニウムクロライド類等のほか、特開昭60-235631号公報に記載されているようなジアリルアンモニウムハロゲン化物等の反応性の陽イオン性界面活性剤を挙げることができる。
また、前記両性界面活性剤としては、例えば、アミノ酸型、ベタイン酸型等のカルボン酸型両性界面活性剤や、スルホン酸型両性界面活性剤等が適当である。
さらに、前記水溶性重合体としては、例えば、公知のアルカリ可溶性重合体等を使用することができる。
これらの界面活性剤は、単独でまたは2種以上を混合して使用することができる。
本実施形態の第2のフッ素樹脂においては、(A)成分の加水分解触媒(以下、単に「加水分解触媒」という。)を使用することにより、(A)成分の縮合反応をより促進させ、生成されるオルガノポリシロキサンの分子量が大きくなり、得られる水系分散体から強度、長期耐久性等に優れた塗膜形成が可能となる。
前記酸性化合物としては、例えば、酢酸、塩酸、硫酸、リン酸、アルキルチタン酸、ドデシルベンゼンスルホン酸、p-トルエンスルホン酸、フタル酸や、(B)成分でもある(メタ)アクリル酸等を挙げることができる。これらの酸性化合物のうち、酢酸、ドデシルベンゼンスルホン酸、(メタ)アクリル酸が好ましい。
なお、加水分解触媒として(メタ)アクリル酸等のラジカル重合性不飽和カルボン酸を用いると、(B)成分として重合することから、得られる塗膜の耐候性や耐水性が劣化することがないという利点が得られる。このような場合、(B)成分中のラジカル重合性不飽和カルボン酸の含有率は、通常、5重量%以下、好ましくは0.1~3重量%程度である。
テトラ-n-ブトキシジルコニウム、トリ-n-ブトキシ・エチルアセトアセテートジルコニウム、ジ-n-ブトキシ・ビス(エチルアセトアセテート)ジルコニウム、n-ブトキシ・トリス(エチルアセトアセテート)ジルコニウム、テトラキス(n-プロピルアセトアセテート)ジルコニウム、テトラキス(アセチルアセトアセテート)ジルコニウム、テトラキス(エチルアセトアセテート)ジルコニウム等の有機ジルコニウム化合物;
テトラ-i-プロポキシチタニウム、ジ-i-プロポキシ・ビス(エチルアセトアセテート)チタニウム、ジ-i-プロポキシ・ビス(アセチルアセテート)チタニウム、ジ-i-プロポキシ・ビス(アセチルアセトン)チタニウム等の有機チタン化合物;
トリ-i-プロポキシアルミニウム、ジ-i-プロポキシ・エチルアセトアセテートアルミニウム、ジ-i-プロポキシ・アセチルアセトナートアルミニウム、i-プロポキシ・ビス(エチルアセトアセテート)アルミニウム、i-プロポキシ・ビス(アセチルアセトナート)アルミニウム、トリス(エチルアセトアセテート)アルミニウム、トリス(アセチルアセトナート)アルミニウム、モノアセチルアセトナート・ビス(エチルアセトアセテート)アルミニウム等の有機アルミニウム化合物や、これらの有機金属化合物の部分加水分解物のほか、
(C4H9)2Sn(OCOCH=CHCOOCH3)2、
(C4H9)2Sn(OCOCH=CHCOOC4H9)2、
(C8H17)2Sn(OCOC8H17)2、
(C8H17)2Sn(OCOC11H23)2、
(C8H17)2Sn(OCOCH=CHCOOCH3)2、
(C8H17)2Sn(OCOCH=CHCOOC4H9)2、
(C8H17)2Sn(OCOCH=CHCOOC8H17)2、
(C8H17)2Sn(OCOCH=CHCOOC16H33)2、
(C8H17)2Sn(OCOCH=CHCOOC17H35)2、
(C8H17)2Sn(OCOCH=CHCOOC18H37)2、
(C8H17)2Sn(OCOCH=CHCOOC20H41)2、
(C4H9)Sn(OCONa)3
等のカルボン酸型有機錫化合物;
(C4H9)2Sn(SCH2COOC8H17)2、
(C4H9)2Sn(SCH2CH2COOC8H17)2、
(C8H17)2Sn(SCH2COOC8H17)2、
(C8H17)2Sn(SCH2CH2COOC8H17)2、
(C8H17)2Sn(SCH2COOC12H25)2、
(C8H17)2Sn(SCH2CH2COOC12H25)2、
(C4H9)Sn(SCOCH=CHCOOC8H17)3、
(C8H17)Sn(SCOCH=CHCOOC8H17)3、
前記加水分解触媒は、単独でまたは2種以上を混合して使用することができ、また亜鉛化合物やその他の反応遅延剤と混合して使用することもできる。
本実施形態に用いられるラジカル重合開始剤としては、例えば、過硫酸カリウム、過硫酸ナトリウム、過硫酸アンモニウム等の過硫酸塩や、過酸化水素、t-ブチルハイドロパーオキサイド、t-ブチルパーオキシマレイン酸、コハク酸パーオキサイド、2,2′-アゾビス〔2-N-ベンジルアミジノ〕プロパン塩酸塩等の水溶性開始剤;ベンゾイルパーオキサイド、クメンハイドロパーオキサイド、ジイソプロピルパーオキシジカーボネート、クミルパーオキシネオデカノエート、クミルパーオキシオクトエート、アゾビスイソブチロニトリル等の油溶性開始剤;酸性亜硫酸ナトリウム、ロンガリット、アスコルビン酸等の還元剤を併用したレドックス系開始剤等を挙げることができる。
(イ)複合重合体粒子は、水系媒体中で、前記(A)~(D)成分を混合乳化して、(A)成分の加水分解・縮合反応を進行させたのち、エマルジョンを微細化させ、次いで前記(E)成分を加えて反応させて、(B)成分の重合反応を進行させることにより製造され、それにより(イ)複合重合体粒子が水系媒体中に分散した水系分散体が得られる。なお、前記の混合乳化して(A)成分の加水分解を進行させる段階では、加水分解物の縮合反応が進行する場合もある。
(A)成分の加水分解・縮合反応および(B)成分の重合反応の条件は、反応温度が、通常、25~90℃、好ましくは40~80℃、反応時間が、通常、0.5~15時間、好ましくは1~8時間である。
このような加水分解・縮合反応および重合反応によると、得られる複合重合体粒子内に、(A)成分に由来するオルガノポリシロキサン成分と(B)成分に由来するビニル系ポリマー成分とが相互に貫入した網目構造(IPN)を形成する。また、(B)成分がシロキサン結合を形成し得る基を有するラジカル重合性モノマーを含有する場合は(A)成分に由来するオルガノポリシロキサン成分と(B)成分に由来するビニル系ポリマー成分とが化学的に結合し、さらには(B)成分の重合時に反応性ラジカルの連鎖移動が生じて、オルガノポリシロキサン鎖にビニル系ポリマー成分がグラフトして化学的に結合する場合もある。さらに、この加水分解・縮合反応および重合反応では、100℃未満の低沸点有機溶媒やトルエンなどの芳香族有機溶剤を実質的に含まないため、良好な作業環境が確保される。
前記pH調節後の水系分散体のpHは、通常、6~10、好ましくは7~8である。
このようにして、(イ)複合重合体粒子が水系媒体中に分散した水系分散体が得られるが、この水系分散体はそのまま、あるいは濃度を調整してから、最終の水系分散体の調製に使用することが好ましい。
(イ)複合重合体粒子の水系分散体の固形分濃度は、通常、10~60重量%、好ましくは20~50重量%である。この固形分濃度は、通常、水の量によって調整される。
(イ)複合重合体粒子の水系分散体における媒体は、本質的に水からなるが、場合により、アルコールなどの有機溶媒を数重量%程度まで含まれていてもよい。
(イ)複合重合体粒子の水系分散体が、前記(A)成分の調製時に用いられた有機溶媒を含む場合には、この有機溶媒を除去してから使用することもできる。
さらに、(イ)複合重合体粒子の水系分散体には、必要に応じて有機溶媒、例えば(A)成分の調製時に用いられるものを添加することもできる。
本実施形態の第2のフッ素樹脂における(ロ)成分は、ラジカル重合性含フッ素モノマーと(メタ)アクリル系モノマーとの共重合体粒子および/または含フッ素系重合体と(メタ)アクリル系重合体との複合重合体粒子からなる。
以下では、ラジカル重合性含フッ素モノマーと(メタ)アクリル系モノマーとの共重合体粒子を「重合体粒子(i)」といい、含フッ素系重合体と(メタ)アクリル系重合体との
複合重合体粒子を「重合体粒子(ii)」といい、重合体粒子(i)と重合体粒子(ii)とをまとめて「(ロ)重合体粒子」という。
重合体粒子(ii)における含フッ素系重合体は、ラジカル重合性含フッ素モノマーの単独重合体あるいは共重合体からなる。
これらのラジカル重合性含フッ素モノマーのうち、フルオロオレフィン類が好ましく、さらに好ましくはフッ化ビニリデン、テトラフルオロエチレンレン、ヘキサフルオロプロピレン等であり、特に好ましくはフッ化ビニリデンである。
前記ラジカル重合性含フッ素モノマーは、単独でまたは2種以上を混合して使用することができる。
これらの(メタ)アクリル系モノマーのうち、アルキル基の炭素数が4~12のアルキルアクリレート類、アルキル基の炭素数が1~6のアルキルメタクリレート類、(メタ)アクリル酸等が好ましく、特に、n-ブチルアクリレート、i-ブチルアクリレート、2-エチルヘキシルアクリレート、メチルメタクリレート、2-エチルヘキシルメタクリレート、シクロヘキシルメタクリレート、(メタ)アクリル酸等が好ましい。
前記(メタ)アクリル系モノマーは、単独でまたは2種以上を混合して使用することができる。
これらの他のラジカル重合性モノマーのうち、アルド基含有不飽和化合物、ケト基含有不飽和化合物等が好ましく、特に、アクロレイン、ビニルメチルケトン、ジアセトン(メタ)アクリルアミド等が好ましい。
前記他のラジカル重合性モノマーは、単独でまたは2種以上を混合して使用することができる。
重合体粒子(ii)の構造としては、含フッ素系重合体をコアとし、(メタ)アクリル系重合体をシェルとするコア・シェル型、(メタ)アクリル系重合体をコアとし、含フッ素系重合体をシェルとするコア・シェル型、含フッ素系重合体と(メタ)アクリル系重合体とが単一粒子中で均一に相溶した均質型等を挙げることができるが、特に耐候性を重視する場合は、均質型であることが好ましい。
重合体粒子(ii)が均質型であることは、示差走査型熱量分析において、単一のガラス転移点を示すことにより、あるいは重合体粒子(ii)をフィルム状にした場合に光学的に透明なフィルムを形成することにより、容易に判別することができる。
前記含フッ素系重合体は、単独でまたは2種以上を混合して使用することができる。
また、フッ化ビニリデン/テトラフルオロエチレン共重合体の場合、各モノマーの含有率は、好ましくは、フッ化ビニリデンが50~90重量%、テトラフルオロエチレンが50~10重量%であり、フッ化ビニリデン/ヘキサフルオロプロピレン共重合体の場合、各モノマーの含有率は、好ましくは、フッ化ビニリデンが50~90重量%、ヘキサフルオロプロピレンが50~10重量%であり、さらにフッ化ビニリデン/テトラフルオロエチレン/ヘキサフルオロプロピレン共重合体の場合、各モノマーの含有率は、好ましくは、フッ化ビニリデンが50~80重量%、テトラフルオロエチレンが10~40重量%、ヘキサフルオロプロピレンが5~40重量%である。
本発明において、含フッ素系重合体の重量平均分子量は、通常、100,000~500,000である。
これらの(メタ)アクリル系重合体は、単独でまたは2種以上を混合して使用することができる。
また、(メタ)アクリル系重合体がアルド基および/またはケト基を有するときには、該(メタ)アクリル系重合体を含フッ素系重合体と均一に相溶させるために、アルキルアクリレート類とアルキルメタクリレート類との合計量に対し、アルキルメタクリレート類を50重量%以上使用することが好ましい。
本発明において、(メタ)アクリル系重合体の重量平均分子量は、通常、50,000~100,000である。
含フッ素系重合体を乳化重合以外の方法により製造した場合、含フッ素系重合体を水性媒体中に分散させる方法は特に限定されるものではなく、その方法としては、例えば、含フッ素系重合体の溶液を水系分散体に転相する方法、沈澱重合により得た含フッ素系重合体粒子を水系媒体中に分散させる方法等を挙げることができる。
前記陰イオン性界面活性剤としては、例えば、高級アルコール硫酸エステルナトリウム塩、アルキルベンゼンスルホン酸ナトリウム塩、コハク酸ジアルキルエステルスルホン酸ナトリウム塩、アルキルジフェニルエーテルジスルホン酸ナトリウム塩、ポリオキシエチレンアルキルエーテル硫酸ナトリウム塩、ポリオキシエチレンアルキルフェニルエーテル硫酸ナトリウム塩等を挙げることができる。
これらの陰イオン性界面活性剤のうち、ラウリル硫酸エステルナトリウム塩、ドデシルベンゼンスルホン酸ナトリウム塩、ポリオキシエチレンアルキルエーテル硫酸ナトリウム塩、ポリオキシエチレンアルキルフェニルエーテル硫酸ナトリウム塩等が好ましい。
前記両性界面活性剤としては、例えば、ラウリルベタイン、ヒドロキシエチルイミダゾリン硫酸エステルナトリウム塩、イミダゾリンスルホン酸ナトリウム塩等を挙げることができる。
前記陽イオン性界面活性剤としては、例えば、アルキルピリジニウムクロライド、アルキルトリメチルアンモニウムクロライド、ジアルキルジメチルアンモニウムクロライド、アルキルジメチルベンジルアンモニウムクロライド等を挙げることができる。
さらに、乳化重合においては、ラジカル重合性モノマーと共重合可能な、いわゆる反応性乳化剤、例えば、スチレンスルホン酸ナトリウム塩、アリルアルキルスルホン酸ナトリウム塩、ポリオキシエチレンアルキルアリルフェニルエーテル硫酸アンモニウム塩、ポリオキシエチレンアルキルアリルフェニルエーテル等を使用することができ、特に、2-(1-アリル)-4-ノニルフェノキシポリエチレングリコール硫酸エステルアンモニウム塩と2-(1-アリル)-4-ノニルフェノキシポリエチレングリコールとを併用することが好ましい。
前記還元剤としては、例えば、ピロ重亜硫酸ナトリウム、亜硫酸水素ナトリウム、亜硫酸ナトリウム、チオ硫酸ナトリウム、L-アスコルビン酸またはその塩、ナトリウムホルムアルデヒドスルホキシレート、硫酸第一鉄、グルコース等を挙げることができる。
これらの還元剤は、単独でまたは2種以上を混合して使用することができる。
前記油溶性重合開始剤としては、例えば、2,2’-アゾビスイソブチロニトリル、2,2’-アゾビス(4-メトキシ-2,4-ジメチルバレロニトリル)、2,2’-アゾビス-2,4-ジメチルバレロニトリル、1,1’-アゾビスシクロヘキサン-1-カルボニトリル、2,2’-アゾビスイソバレロニトリル、2,2’-アゾビスイソカプロニトリル、2,2’-アゾビス(フェニルイソブチロニトリル)、ベンゾイルパーオキシド、ジ-t-ブチルパーオキシド、ジラウロイルパーオキシド、クメンハイドロパーオキシド、ジイソプロピルベンゼンハイドロパーオキシド、パラメンタンハイドロパーオキシド、t-ブチルハイドロパーオキシド、3,5,5-トリメチルヘキサノールパーオキシド、t-ブチルパーオキシ(2-エチルヘキサノエート)等を挙げることができる。
これらの油溶性重合開始剤のうち、2,2’-アゾビスイソブチロニトリル、ベンゾイルパーオキシド、クメンハイドロパーオキシド、ジイソプロピルベンゼンハイドロパーオキシド、パラメンタンハイドロパーオキシド、t-ブチルハイドロパーオキシド、3,5,5-トリメチルヘキサノールパーオキシド、t-ブチルパーオキシ(2-エチルヘキサノーエート)等が好ましい。
本実施形態の第2のフッ素樹脂において、水溶性重合開始剤および油溶性重合開始剤は、それぞれ単独でまたは2種以上を混合して使用することができ、また水溶性重合開始剤と油溶性重合開始剤とを併用することもできる。
重合開始剤の使用量は、ラジカル重合性モノマーの合計100重量部に対して、通常、0.1~3重量部である。
これらの連鎖移動剤は、単独でまたは2種以上を混合して使用することができる。
連鎖移動剤の使用量は、ラジカル重合性モノマーの合計100重量部に対して、通常、0~10重量部である。
これらのキレート化剤およびpH調整剤は、それぞれ単独でまたは2種以上を混合して使用することができる。
キレート化剤およびpH調整剤の使用量は、ラジカル重合性モノマーの合計100重量部に対して、それぞれ、通常、0~0.1重量部および0~3重量部である。
これらの溶媒は、単独でまたは2種以上を混合して使用することができる。
溶媒の使用量は、作業性、防災安全性、環境安全性および製造安全性を損なわない範囲内の少量であることが好ましく、ラジカル重合性モノマーの合計100重量部に対して、通常、0~20重量部程度である。
それらの添加方法としては、例えば、1)含フッ素系重合体粒子の水系分散体にラジカル重合性モノマーの全量を一括して添加する方法、2)含フッ素系重合体粒子の水系分散体にラジカル重合性モノマーの一部を仕込んで反応させたのち、残りのラジカル重合性モノマーを連続または分割して仕込む方法、3)含フッ素系重合体粒子の水系分散体にラジカル重合性モノマーの全量を連続または分割して添加する方法、4)水系媒体中におけるラジカル重合性モノマーの乳化重合時に、含フッ素系重合体粒子を連続または分割して添加する方法等を挙げることができる。
これらの添加方法のうち、特に、1)の方法や、2)の方法において、含フッ素系重合体粒子の水系分散体に最初に仕込むラジカル重合性モノマーの量が全体の50重量%以上である方法が好ましい。
重合体粒子(ii)の平均粒径は、含フッ素系重合体粒子の大きさを適宜選択することによって、容易に調整することができる。
また、重合体粒子(i)も、前述したような重合体粒子(ii)の水系分散体の製造方法と同様にして、製造することができる。
(ロ)重合体粒子の水系分散体における媒体は、本質的に水からなるが、場合により、アルコールなどの有機溶媒を数重量%程度まで含まれていてもよい。
本実施形態の水系分散体における(イ)複合重合体粒子と(ロ)重合体粒子との比率は、通常、90/10~10/90、好ましくは80/20~20/80、さらに好ましくは70/30~30/70、特に好ましくは60/40~40/60である。
また、本実施形態の第2のフッ素樹脂の水系分散体における(イ)複合重合体粒子および(ロ)重合体粒子の合計濃度は、通常、10~60重量%、好ましくは30~50重量%である。
表2に本実施形態の第2のフッ素樹脂の一般物性を示す。
第2のフッ素樹脂:フッ化ビニリデンポリマーとアクリルポリマーが分子レベルで相溶されているシフクリア(JSR(株)製のフッ素アクリルエマルジョン)
また、表3においてはこれらの配合割合を数値で表記した。
なお、塗布量等の制御は、ガラス繊維織布12への張力と、フッ素樹脂液13の粘度、およびドクターブレード16の角度によって制御する。
A4サイズにカットした後、シートをループ形状となるよう折り曲げ、反発する力が強い場合は硬い、弱い場合は柔軟、中間をやや硬い、とし、評価を行った。
5cm×10cmにカットしたシートをループ形状となるよう折り曲げた後、上下2枚のアクリル板で挟み、シートとシートが接触するよう完全に折り曲げた後、シートに折り目や材破が無いか目視にて評価を行った。
ISO5660発熱性試験方法コーンカロリー計法によった。8以下で不燃認証試験に合格とされる。
JISK7161:1994プラスチック引張試験方法によった。
JISK77128-3プラスチック-フィルム及びシートの引裂き強さ試験方法直角形引裂法によった。
JISK7161:1994プラスチック引張試験方法によった。
ダイプラウィンテス製メタルウェザーによる長期耐候性試験を実施した。
試験条件は、照度65mW/cm2、ブラックパネル温度53℃、LIGHT照射時条件(53℃/70%RH/20時間)、DEW結露条件(30℃/98%RH/4時間)、LIGHTの後に30秒シャワーの1サイクル24時間である。
試験時間は408時間実施した後、著しい変色や損傷等無いか目視にて評価を行った。
2…不燃繊維織布
3…樹脂層
Claims (8)
- 不燃繊維からなる織布表面に、
フッ化ビニリデン共重合物とアクリル共重合物とを有する第1のフッ素樹脂を少なくとも含む樹脂層が形成されてなることを特徴とする不燃シート。 - 前記樹脂層が、フッ化ビニリデン系ポリマーとシロキサン系ポリマーと架橋型アクリルポリマーとを有する第2のフッ素樹脂を含むことを特徴とする請求項1記載の不燃シート。
- 前記第1のフッ素樹脂が酸化チタンを含むことを特徴とする請求項1または2記載の不燃シート。
- 厚さが100~200μm程度であることを特徴とする請求項1から3のいずれか記載の不燃シート。
- 不燃繊維からなる織布を、
フッ化ビニリデン共重合物とアクリル共重合物と水とを有する第1のフッ素樹脂を少なくとも含む樹脂に含浸させて樹脂層を形成することを特徴とする不燃シートの製造方法。 - 前記樹脂が、フッ化ビニリデン系ポリマーとシロキサン系ポリマーと架橋型アクリルポリマーとを有する第2のフッ素樹脂を含むことを特徴とする請求項5記載の不燃シートの製造方法。
- 前記第1のフッ素樹脂が酸化チタンを含むことを特徴とする請求項5または6記載の不燃シートの製造方法。
- 厚さが100~200μm程度であることを特徴とする請求項1から7のいずれか記載の不燃シートの製造方法。
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WO2019014661A1 (en) * | 2017-07-14 | 2019-01-17 | Arkema Inc | HIGH RESISTANCE POLYVINYLIDENE FLUORIDE COMPOSITE |
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JPWO2021106630A1 (ja) * | 2019-11-27 | 2021-06-03 | ||
WO2021106630A1 (ja) * | 2019-11-27 | 2021-06-03 | ダイキン工業株式会社 | 複合材料の製造方法 |
JP7194845B2 (ja) | 2019-11-27 | 2022-12-22 | ダイキン工業株式会社 | 複合材料の製造方法 |
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JP6382306B2 (ja) | 2018-08-29 |
JPWO2015174545A1 (ja) | 2017-04-20 |
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KR20160145716A (ko) | 2016-12-20 |
KR101932829B1 (ko) | 2018-12-27 |
EP3144139A4 (en) | 2017-12-13 |
CN106660306B (zh) | 2020-01-21 |
EP3144139B1 (en) | 2021-06-23 |
EP3144139A1 (en) | 2017-03-22 |
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US20170056924A1 (en) | 2017-03-02 |
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