WO2016147790A1 - 塗料組成物及び被覆物品 - Google Patents
塗料組成物及び被覆物品 Download PDFInfo
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- WO2016147790A1 WO2016147790A1 PCT/JP2016/054844 JP2016054844W WO2016147790A1 WO 2016147790 A1 WO2016147790 A1 WO 2016147790A1 JP 2016054844 W JP2016054844 W JP 2016054844W WO 2016147790 A1 WO2016147790 A1 WO 2016147790A1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C09D127/18—Homopolymers or copolymers of tetrafluoroethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08L27/18—Homopolymers or copolymers or tetrafluoroethene
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C09D127/20—Homopolymers or copolymers of hexafluoropropene
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
- C09D201/02—Coating compositions based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
- C09D201/04—Coating compositions based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing halogen atoms
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/02—Emulsion paints including aerosols
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/40—Glass
Definitions
- the present invention relates to a coating composition and a coated article.
- a coating layer formed of a fluororesin excellent in non-adhesiveness and stain resistance is provided.
- Patent Document 1 includes at least one of inorganic and / or organic pigments, fluoropolymers and binder resins as polyamideimide, polyimide, polyetherimide, polyethersulfone, polyphenylene sulfide, polyetherketone, and silicone resin, or at least one thereof.
- Articles comprising at least a single layer coating containing two mixtures are described, wherein said fluoropolymer is a mixture of at least one fluoropolymer and at least one thermoplastic fluoropolymer that cannot be processed from a molten state And a weight ratio of thermoplastic fluoropolymer up to 20% by weight of the fluoropolymer that cannot be processed from the molten state.
- the present invention has an object to provide a coating composition that provides a coating film excellent in adhesion to a substrate, non-adhesive, hardness at high temperature, and excellent in wear resistance. To do.
- the present inventors use the two types of fluororesins of non-melt processable polytetrafluoroethylene and a fluoropolymer, and by making these ratios within a specific range, the above-mentioned problems can be solved satisfactorily. As a result, the present invention has been completed.
- the present invention relates to a non-melt processable polytetrafluoroethylene, a fluoropolymer (excluding the non-melt processable polytetrafluoroethylene), and a heat-resistant resin (however, the non-melt processable polytetrafluoroethylene).
- a coating composition characterized in that the content of the non-melt-processable polytetrafluoroethylene is 10 to 60% by mass relative to the fluoropolymer. It is a thing.
- the fluorine-containing polymer is preferably a low molecular weight polytetrafluoroethylene.
- the fluoropolymer is preferably at least one selected from the group consisting of a tetrafluoroethylene / perfluoro (alkyl vinyl ether) copolymer and a tetrafluoroethylene / hexafluoropropylene copolymer.
- the heat resistant resin preferably has a continuous usable temperature of 150 ° C. or higher.
- the heat resistant resin is at least one selected from the group consisting of polyamideimide resin, polyimide resin, polyethersulfone resin, polyetherimide resin, polyetheretherketone resin, aromatic polyester resin, and polyarylene sulfide resin. Preferably there is.
- the coating composition preferably further contains a filler having a new Mohs hardness of 7 or more.
- the fillers are diamond, fluorinated diamond, corundum, silica, boron nitride, boron carbide, silicon carbide, silica, mica, chrysoberyl, topaz, beryl, garnet, quartz, glass flake, fused zirconia, tantalum carbide, titanium carbide. It is preferably at least one selected from the group consisting of alumina, and tungsten carbide.
- the coating composition preferably further contains water.
- the coated article which has a base material and the coating film which consists of the above-mentioned coating composition formed on the said base material is also one of this invention.
- the coating composition of the present invention Since the coating composition of the present invention has the above-described configuration, it can be directly applied to a substrate, and the resulting coating film has excellent adhesion to the substrate, and is non-adhesive at high temperatures. Excellent hardness and wear resistance. Therefore, the coating composition of the present invention is useful as a one-coat coating.
- the coated article of the present invention has the above-described configuration, the coating film and the base material are in close contact with each other, and is excellent in non-adhesiveness, hardness at high temperature, and wear resistance. Since the coated article of the present invention includes a coating film obtained from the coating composition, even if it consists of only two layers of the substrate and the coating film, non-adhesiveness, hardness at high temperature, And it is excellent in abrasion resistance.
- the present invention is characterized in that it includes two types of fluororesin, that is, non-melt processable polytetrafluoroethylene (PTFE) and a fluoropolymer (excluding the non-melt processable PTFE).
- PTFE non-melt processable polytetrafluoroethylene
- fluoropolymer excluding the non-melt processable PTFE
- the content of the non-melt-processable PTFE is 10 to 60% by mass with respect to the fluoropolymer.
- the content of the non-melt processable PTFE is preferably 15% by mass or more, and more preferably 55% by mass or less.
- non-melt processability means a property that the melt flow rate cannot be measured at a temperature higher than the crystallization melting point in accordance with ASTM D-1238 and D-2116.
- the non-melt processable PTFE preferably has fibrillation properties.
- the fibrillation property refers to the property of easily fibrillating to form fibrils.
- the presence or absence of fibrillation can be determined by “paste extrusion” which is a typical method for forming “high molecular weight PTFE powder” which is a powder made from a TFE polymer.
- paste extrusion is possible because high molecular weight PTFE has fibrillation properties.
- an unfired molded product obtained by paste extrusion does not have substantial strength or elongation, for example, when the elongation breaks when pulled at 0%, it can be considered that there is no fibrillation property.
- the non-melt processable PTFE preferably has a standard specific gravity (SSG) of 2.130 to 2.230.
- SSG is more preferably 2.130 to 2.190, and further preferably 2.140 to 2.170.
- SSG is a value measured according to ASTM D 4895.
- the non-melt-processable PTFE is a melting heat curve obtained from a non-melt-processable PTFE having a history of heating to a temperature of 300 ° C. or higher with a differential scanning calorimeter at a heating rate of 10 ° C./min. It preferably has a peak top (DSC melting point) at 347 ° C. More preferred are those having a peak top at 333 to 345 ° C., and still more preferred are those having a peak top at 340 to 345 ° C. When the peak top (DSC melting point) is within the above range, it is possible to form a coating film that is more excellent in hardness at high temperatures and wear resistance.
- RDC220 manufactured by SII Nanotechnology temperature-calibrated using indium and lead as a standard sample in advance is used. 3 mg is put into an aluminum pan (crimp container), and a temperature range of 250 to 380 ° C. is raised at 10 ° C./min under an air stream of 200 ml / min.
- the standard sample is calibrated with heat using indium, lead, and tin, and the empty aluminum pan is sealed and used as the measurement reference.
- the obtained heat of fusion curve uses Muse standard analysis software (made by SII Nano Technology) as the DSC melting point at the temperature showing the peak top of the heat of fusion.
- the non-melt processable PTFE may be a modified polytetrafluoroethylene (hereinafter also referred to as “modified PTFE”) or a homopolytetrafluoroethylene (hereinafter also referred to as “homo PTFE”). Also good.
- modified PTFE modified polytetrafluoroethylene
- homopolytetrafluoroethylene hereinafter also referred to as “homo PTFE”. Also good.
- the modified PTFE is modified PTFE composed of tetrafluoroethylene (TFE) and a monomer other than TFE (hereinafter also referred to as “modified monomer”).
- TFE tetrafluoroethylene
- modified monomer a monomer other than TFE
- the modifying monomer is not particularly limited as long as it can be copolymerized with TFE.
- perfluoroolefin such as hexafluoropropylene (HFP); chlorofluoroolefin such as chlorotrifluoroethylene (CTFE);
- HFP hexafluoropropylene
- CFE chlorofluoroolefin
- HFP hexafluoropropylene
- CFE chlorofluoroolefin
- examples thereof include hydrogen-containing fluoroolefins such as trifluoroethylene and vinylidene fluoride (VDF), perfluorovinyl ether, perfluoroalkylethylene, ethylene, etc.
- VDF vinylidene fluoride
- one or more kinds of modified monomers may be used. There may be.
- Rf represents a perfluoro organic group
- perfluoro organic group means an organic group in which all hydrogen atoms bonded to carbon atoms are substituted with fluorine atoms.
- the perfluoro organic group may have ether oxygen.
- perfluorovinyl ether examples include perfluoro (alkyl vinyl ether) (PAVE) in which Rf is a perfluoroalkyl group having 1 to 10 carbon atoms in the general formula (1).
- the perfluoroalkyl group preferably has 1 to 5 carbon atoms.
- Examples of the perfluoroalkyl group in the PAVE include a perfluoromethyl group, a perfluoroethyl group, a perfluoropropyl group, a perfluorobutyl group, a perfluoropentyl group, and a perfluorohexyl group.
- the group is preferably a perfluoropropyl group. That is, the PAVE is preferably perfluoropropyl vinyl ether (PPVE).
- Rf is a perfluoro (alkoxyalkyl) group having 4 to 9 carbon atoms, and Rf is represented by the following formula:
- Rf is the following formula:
- n an integer of 1 to 4.
- the perfluoroalkylethylene is not particularly limited, and examples thereof include perfluorobutylethylene (PFBE) and perfluorohexylethylene.
- the modified monomer in the modified PTFE is preferably at least one selected from the group consisting of HFP, CTFE, VDF, PAVE, PFAE, and ethylene. PAVE is more preferable, and PPVE is still more preferable.
- the homo-PTFE is substantially composed of only TFE units.
- the homo-PTFE is obtained without using a modified monomer.
- the modified monomer unit is preferably 0.001 to 2 mol%, and more preferably 0.001 to 1 mol%.
- each monomer constituting PTFE can be calculated by appropriately combining NMR, FT-IR, elemental analysis, and fluorescent X-ray analysis depending on the type of monomer.
- the coating composition of the present invention further contains a fluorine-containing polymer.
- the fluoropolymer is a fluoropolymer other than the non-melt processable PTFE.
- examples of the fluoropolymer include low molecular weight PTFE, TFE / PAVE copolymer (PFA), TFE / HFP copolymer (FEP), ethylene (Et) / TFE copolymer (ETFE), Et / TFE / HFP.
- the molecular weight is at least one selected from the group consisting of PTFE, PFA and FEP.
- the fluoropolymer preferably has melt processability.
- melt processability means that the polymer can be melted and processed using conventional processing equipment such as an extruder and an injection molding machine. Therefore, the fluoropolymer usually has a melt flow rate (MFR) of 0.01 to 100 g / 10 min.
- the MFR is measured according to the type of fluoropolymer using a melt indexer (manufactured by Yasuda Seiki Seisakusho) according to ASTM D 1238 (for example, 372 in the case of PFA or FEP).
- ASTM D 1238 for example, 372 in the case of PFA or FEP.
- the fluoropolymer preferably has a melting point of 100 to 333 ° C., more preferably 140 ° C. or higher, still more preferably 160 ° C. or higher, particularly preferably 180 ° C. or higher. It is more preferable that it is below °C.
- fusing point of the said fluoropolymer is temperature corresponding to the maximum value in a heat of fusion curve when it heats up at a speed
- DSC differential scanning calorimeter
- the fluoropolymer is preferably low molecular weight PTFE.
- the low molecular weight PTFE preferably has melt processability.
- the low molecular weight PTFE preferably has a number average molecular weight of 600,000 or less. “High molecular weight PTFE” having a number average molecular weight exceeding 600,000 is non-melt processable and exhibits fibrillation characteristics peculiar to PTFE (see, for example, JP-A-10-147617).
- the low molecular weight PTFE preferably has no fibrillation property. From low molecular weight PTFE that does not fibrillate, a continuous extrudate (extruded strand) cannot be obtained by paste extrusion.
- the low molecular weight PTFE preferably has a melt viscosity at 380 ° C. of 1 to 1 ⁇ 10 7 Pa ⁇ s.
- melt viscosity is within the above range, it is possible to form a coating film that is more excellent in non-adhesiveness, hardness at high temperature, and abrasion resistance.
- the melt viscosity is in accordance with ASTM D 1238, and a 2 g sample that has been heated for 5 minutes at a measurement temperature (380 ° C.) in advance using a flow tester (manufactured by Shimadzu Corporation) and a 2 ⁇ -8L die is set to 0.000.
- the measurement can be performed while maintaining the above temperature with a load of 7 MPa.
- the low molecular weight PTFE has a peak top (DSC melting point) of 322 to 333 ° C. in a heat of fusion curve obtained with a differential scanning calorimeter at a heating rate of 10 ° C./min for PTFE that has not been heated to a temperature of 300 ° C. or higher. ). More preferably, it has a peak top at 325 to 332 ° C.
- DSC melting point peak top
- the low molecular weight PTFE may be modified PTFE or homo-PTFE.
- the modified monomers constituting the modified PTFE may be those already exemplified.
- the melt-processable fluoropolymer is preferably at least one selected from the group consisting of PFA and FEP.
- the copolymer whose molar ratio (TFE unit / PAVE unit) of a TFE unit and a PAVE unit is 70/30 or more and less than 99/1 is preferable.
- a more preferable molar ratio is 70/30 or more and 98.9 / 1.1 or less, and a still more preferable molar ratio is 80/20 or more and 98.9 / 1.1 or less.
- monomer units derived from monomers copolymerizable with TFE and PAVE are 0.1 to 10 mol%, and TFE units and PAVE units are 90 to 99.9 mol% in total.
- a copolymer is also preferred.
- the PFA preferably has a melting point of 180 to less than 322 ° C., more preferably 230 to 320 ° C., and even more preferably 280 to 320 ° C.
- fusing point is temperature corresponding to the maximum value in a heat of fusion curve when it heats up at a speed
- the PFA preferably has a melt flow rate (MFR) of 1 to 100 g / 10 minutes.
- the PFA preferably has a thermal decomposition starting temperature of 380 ° C. or higher.
- the thermal decomposition start temperature is more preferably 400 ° C. or higher, and still more preferably 410 ° C. or higher.
- the thermal decomposition starting temperature is determined by using a differential thermal / thermogravimetric measuring apparatus [TG-DTA] (trade name: TG / DTA6200, manufactured by Seiko Denshi), and a 10 mg sample at a heating rate of 10 ° C./min. The temperature was raised from room temperature and the sample was reduced by 1% by mass.
- TG-DTA differential thermal / thermogravimetric measuring apparatus
- the copolymer whose molar ratio (TFE unit / HFP unit) of a TFE unit and a HFP unit is 70/30 or more and less than 99/1 is preferable.
- a more preferable molar ratio is 70/30 or more and 98.9 / 1.1 or less, and a still more preferable molar ratio is 80/20 or more and 98.9 / 1.1 or less.
- the monomer units derived from monomers copolymerizable with TFE and HFP are 0.1 to 10 mol%, and the total of TFE units and HFP units is 90 to 99.9 mol%.
- a copolymer is also preferred.
- monomers copolymerizable with TFE and HFP include PAVE and alkyl perfluorovinyl ether derivatives.
- the FEP preferably has a melting point of 150 to 322 ° C., more preferably 200 to 320 ° C., and still more preferably 240 to 320 ° C.
- the FEP preferably has an MFR of 1 to 100 g / 10 min.
- the FEP preferably has a thermal decomposition starting temperature of 360 ° C. or higher.
- the thermal decomposition starting temperature is more preferably 380 ° C. or higher, and further preferably 390 ° C. or higher.
- the content of each monomer unit in the fluoropolymer can be calculated by appropriately combining NMR, FT-IR, elemental analysis, and fluorescent X-ray analysis depending on the type of monomer.
- the coating composition of the present invention is further characterized by containing a heat-resistant resin (excluding the non-melt-processable PTFE and the fluoropolymer).
- the heat resistant resin preferably has a continuous usable temperature of 150 ° C. or higher.
- the heat resistant resin is at least one selected from the group consisting of polyamideimide resin, polyimide resin, polyethersulfone resin, polyetherimide resin, polyetheretherketone resin, aromatic polyester resin, and polyarylene sulfide resin. Preferably there is.
- the polyamide-imide resin [PAI] is a resin composed of a polymer having an amide bond and an imide bond in the molecular structure.
- the PAI is not particularly limited.
- Reacts with diamines such as 4,4-diaminophenyl ether and diisocyanates such as diphenylmethane diisocyanate
- consists of a high molecular weight polymer obtained by each reaction such as a reaction between a dibasic acid having an aromatic imide ring in the molecule and a diamine
- resins As said PAI, what consists of a polymer which has an aromatic ring in a principal chain from the point which is excellent in heat resistance is preferable.
- the polyimide resin [PI] is a resin made of a polymer having an imide bond in the molecular structure.
- the PI is not particularly limited, and examples thereof include a resin made of a high molecular weight polymer obtained by a reaction of an aromatic tetravalent carboxylic anhydride such as pyromellitic anhydride.
- an aromatic tetravalent carboxylic anhydride such as pyromellitic anhydride.
- what consists of a polymer which has an aromatic ring in a principal chain from the point which is excellent in heat resistance is preferable.
- the polyethersulfone resin [PES] has the following general formula:
- the PES is not particularly limited, and examples thereof include a resin made of a polymer obtained by polycondensation of dichlorodiphenyl sulfone and bisphenol.
- the heat-resistant resin is excellent in adhesion to the base material, and can form a non-adhesive, high-temperature hardness, and excellent wear resistance. It is preferable that it is at least one selected resin.
- Each of PAI, PI, and PES may be composed of one type or two or more types.
- the heat resistant resin is more preferably at least one resin selected from the group consisting of PAI and PI from the viewpoint of excellent adhesion to the substrate and heat resistance.
- the heat resistant resin is preferably composed of PES and at least one resin selected from the group consisting of PAI and PI from the viewpoint of excellent corrosion resistance and water vapor resistance. That is, the heat resistant resin may be a mixture of PES and PAI, a mixture of PES and PI, or a mixture of PES, PAI, and PI.
- the heat-resistant resin is particularly preferably a mixture of PES and PAI.
- the heat-resistant resin is composed of PES and one or both of PAI and PI
- the PES is 5 to 60% by mass of the total amount of the PES and PAI and PI. Is preferred. More preferably, it is 10 to 40% by mass.
- the content of the heat-resistant resin is preferably 15 to 85% by mass, more preferably 20% by mass or more based on the total amount of the non-melt processable PTFE and the fluoropolymer. More preferably, it is 80 mass% or less.
- the content of the heat-resistant resin is within the above range, it is possible to form a coating film that is further excellent in adhesion to the substrate, non-adhesive, hardness under high temperature, and abrasion resistance.
- the coating composition of the present invention preferably further contains a filler having a new Mohs hardness of 7 or more.
- a filler having a specific hardness it is possible to form a coating film that is further excellent in adhesion to the substrate, non-adhesive, hardness at high temperature, and abrasion resistance.
- the fillers are diamond, fluorinated diamond, corundum, silica, boron nitride, boron carbide, silicon carbide, silica, mica, chrysoberyl, topaz, beryl, garnet, quartz, glass flake, fused zirconia, tantalum carbide, titanium carbide. It is preferably at least one selected from the group consisting of alumina, and tungsten carbide, and more preferably at least one selected from the group consisting of diamond, boron carbide, silicon carbide, alumina, and molten zirconia. Preferably, at least one selected from the group consisting of diamond and silicon carbide is more preferable.
- Fluorinated diamond can be obtained by fluorinating diamond.
- the fluorination of diamond can be carried out by a known method disclosed in, for example, the 26th Fluorine Chemistry Discussion Summary, issued November 14, 2002, p. That is, diamond may be sealed in a reactor made of a material having corrosion resistance to fluorine, such as nickel or an alloy containing nickel, and fluorinated by introducing fluorine gas.
- the filler content is preferably 0.1 to 10% by mass with respect to the total amount of non-melt processable PTFE, fluoropolymer and heat resistant resin,
- the content is more preferably at least mass%, more preferably at most 5.0 mass%.
- the content of the filler is within the above range, it is possible to form a coating film that is further excellent in adhesion to the substrate, non-adhesive, hardness under high temperature, and abrasion resistance.
- the coating composition may be liquid or powder, but is preferably liquid.
- the coating composition may contain water or an organic solvent, and preferably contains water and an organic solvent.
- the coating composition is preferably an aqueous coating composition.
- the solid content concentration of the coating composition is preferably 5 to 70% by mass. More preferably, it is at least mass%, more preferably at most 60 mass%.
- the coating composition preferably also contains a surfactant.
- a surfactant A conventionally well-known thing can be used as said surfactant.
- the coating composition includes the non-melt-processable PTFE, the fluoropolymer, the heat-resistant resin, the inorganic particles, water and / or an organic solvent if necessary, and the surfactant mixed with a mixer or a roll mill. It can be prepared by an ordinary mixing method.
- the coating composition may further contain an additive.
- the additive is not particularly limited, and for example, a leveling agent, a solid lubricant, an anti-settling agent, a moisture absorbent, a surface conditioner, a thixotropic agent, a viscosity modifier, an antigelling agent, an ultraviolet absorber, a light Stabilizer, plasticizer, anti-coloring agent, anti-skinning agent, anti-scratch agent, anti-mold agent, antibacterial agent, antioxidant, anti-static agent, silane coupling agent, carbon black, clay, extender pigment, scale And pigments, barium sulfate, glass, various reinforcing materials, various fillers, conductive fillers, metal powders such as gold, silver, copper, platinum and stainless steel.
- the content of the additive is preferably 0.1 to 30% by mass, more preferably 1% by mass or more based on the total amount of non-melt processable PTFE, fluoropolymer and heat-resistant resin. Preferably, it is 25 mass% or less.
- a coating film can be formed by apply
- the formed coating film is excellent in adhesion to the substrate, and is excellent in non-adhesiveness, hardness at high temperature, and wear resistance.
- the coating composition can be repeatedly applied, a coating film having desired characteristics can be formed by a single coating.
- the coating composition can be suitably used as a one-coat coating composition.
- the coating composition can form a thick coating film by a single coating.
- the coating method of the coating composition is not particularly limited, and examples thereof include spray coating, roll coating, doctor blade coating, dip (immersion) coating, impregnation coating, spin flow coating, curtain flow coating, and the like. Spray coating is preferred.
- the coating film may be dried or baked.
- the drying is preferably performed at a temperature of 70 to 300 ° C. for 5 to 60 minutes.
- the firing is preferably performed at a temperature of 260 to 410 ° C. for 10 to 30 minutes.
- the coated article which has a base material and the coating film which consists of the above-mentioned coating composition formed on this base material is also one of this invention.
- the coated article is excellent in non-adhesiveness, hardness at high temperature, and wear resistance even when it consists of only two layers of the substrate and the coating film. Therefore, it can be suitably used as a cooking utensil such as a frying pan.
- the material for the substrate is not particularly limited, and examples thereof include metals such as iron, aluminum, and copper, and metals such as alloys thereof; non-metallic inorganic materials such as enamel, glass, and ceramics. Examples of the alloys include stainless steel.
- the material for the substrate is preferably a metal, more preferably aluminum or stainless steel.
- the base material may be subjected to a surface treatment such as a degreasing treatment or a surface roughening treatment, if necessary.
- a surface treatment such as a degreasing treatment or a surface roughening treatment, if necessary.
- the surface roughening treatment method is not particularly limited, and examples thereof include chemical etching with acid or alkali, anodization (alumite treatment), and sandblasting.
- the film thickness of the coating film is preferably 1 to 50 ⁇ m, more preferably 5 ⁇ m or more, and even more preferably 40 ⁇ m or less. If the film thickness is too small, the corrosion resistance and wear resistance may be inferior, and if the film thickness is too large, cracks may easily occur.
- the said coating film can be formed by apply
- the coated article may include a layer other than the base material and the coating film, but has high adhesion between the base material and the coating film, and an excellent coating film made of the coating composition. It is preferable to have only the base material and the coating film because the characteristics can be fully utilized.
- the coated article preferably has a substrate peel hardness measured at 200 ° C. of HB or higher, more preferably F or higher.
- the substrate peeling hardness can be measured according to JIS K 6894.
- a coated article having a coating film composed of the coating composition can be used for applications utilizing the non-adhesiveness, heat resistance, slipperiness, etc. of the fluoropolymer, for example, using non-adhesiveness
- Cooking utensils such as frying pans, pressure cookers, pans, grill pans, rice cookers, ovens, hot plates, baking molds, knives, gas tables; kitchen utensils such as electric pots, ice trays, molds, range hoods; Parts for food industry such as rolling rolls, conveyors, hoppers, etc .; industrial supplies such as office automation (OA) rolls, OA belts, OA separation claws, papermaking rolls, film production calendar rolls, etc .; Molds, molds, mold release molds for plywood / decorative board production, industrial containers (especially for the semiconductor industry), etc.
- OA office automation
- Items such as saws, files, etc .; household items such as irons, scissors, knives; metal foils, electric wires, food processing machines, packaging machines, sliding machines for textile machines, sliding parts for cameras and watches, pipes, valves Automobile parts such as bearings, snow shovels, plows, chutes and the like.
- it can be suitably used for cooking utensils and kitchen utensils, and can be particularly suitably used for frying pans.
- New Mohs hardness The new Mohs hardness of each filler was determined based on a list of substances described in the literature and a safety data sheet (SDS) of each filler.
- SDS safety data sheet
- Preparation of coated plate The surface of a pure aluminum plate (A-1050P) having a thickness of 2.0 mm is degreased with acetone, and then sandblasted. The surface roughness Ra value measured according to JIS B 1982 is 2.0 to The surface was roughened to be 3.0 ⁇ m. After removing dust on the surface by air blow, spray coating was performed at a spraying pressure of 0.2 MPa using a gravity spray gun having a nozzle diameter of 1.0 mm. The coating film on the aluminum plate was dried at 80 to 100 ° C. for 15 minutes. Then, it baked for 20 minutes at 380 degreeC, and produced the coating board which has a coating film with a film thickness of about 20 micrometers.
- Pencil hardness room temperature or 200 ° C
- the hardness of the hardest pencil at which the coating film was torn and the substrate was not exposed was defined as pencil hardness (substrate peeling hardness).
- the results are shown in the table. Symbols such as F and 2B in the table represent pencil hardness symbols. Less than 6B means that the hardness is lower than 6B.
- a wear-resistant 3M industrial pad (trade name: Scotch Bright 7447C) is cut to 3 cm square, 1 cc of 5% neutral detergent is hung, reciprocated with a load of 4.5 kg, and the pad is replaced every 1000 reciprocations. And evaluated by the number of reciprocations until the substrate was exposed.
- PAI varnish 29 parts by mass of PAI (solid content) dissolved in 71 parts by mass of N-methyl-2-pyrrolidone
- PAI aqueous dispersion The solid content of the obtained dispersion was 20% by mass.
- a mixture was prepared by adding 118 g of pure water, 40 g of a polyether nonionic surfactant having a concentration of 20% by mass, 40 g of carbon black, and 2.2 g of diethylethanolamine. Then, it grind
- Examples 1-2 and Comparative Examples 1-5 Carbon black aqueous dispersion was mixed with PTFE aqueous dispersion (PTFE melting point 344 ° C., average particle size 0.28 ⁇ m, solid content 60 mass%, PTFE is non-melt processable), low molecular weight PTFE aqueous dispersion (low molecular weight PTFE Melting point 327 ° C., average particle size 0.26 ⁇ m, solid content 40% by mass). Thereafter, an aqueous PAI dispersion, an aqueous barium sulfate dispersion, and silicon carbide (average particle size 18 ⁇ m, new Mohs hardness 13) were added.
- PTFE melting point 344 ° C., average particle size 0.28 ⁇ m, solid content 60 mass%, PTFE is non-melt processable low molecular weight PTFE aqueous dispersion (low molecular weight PTFE Melting point 327 ° C., average particle size 0.26 ⁇ m,
- An aqueous dispersion having a solid content of 24% by mass was obtained.
- Table 1 shows the mass ratio of each component in each example and comparative example. The mass ratio of silicon carbide was 3.5 in Examples 1-2 and Comparative Examples 1-5.
- An aqueous dispersion having a solid content of 24% by mass was obtained.
- Table 2 shows the mass ratio of each component in each example and comparative example. The mass ratio of silicon carbide was 3.5 in Examples 3 to 5 and Comparative Examples 6 to 10.
Abstract
Description
CF2=CF-ORf(1)
(式中、Rfは、パーフルオロ有機基を表す。)で表されるパーフルオロ不飽和化合物等が挙げられる。本明細書において、上記「パーフルオロ有機基」とは、炭素原子に結合する水素原子が全てフッ素原子に置換されてなる有機基を意味する。上記パーフルオロ有機基は、エーテル酸素を有していてもよい。
本明細書において、融点は、示差走査熱量計〔DSC〕を用いて10℃/分の速度で昇温したときの融解熱曲線における極大値に対応する温度である。
中でも、調理器具や厨房用品に好適に用いることができ、特にフライパンに好適に用いることができる。
各充填材の新モース硬度については、文献に記載されている物質リスト、さらに、各充填材の安全データシート(SDS)を基に、硬度を判定した。
示差走査熱測定(DSC)により測定した。RDC220(エスアイアイ・ナノテクノロジー社製)を用い、非溶融加工性PTFE又は含フッ素重合体の試料約3mgをアルミ製パン(クリンプ容器)に入れ、200ml/分のエアー気流下で、250~380℃の温度領域を10℃/分で昇温させて行った。得られた融解熱曲線は、Muse標準解析ソフト(エスアイアイ・ナノテクノロジー社製)を用いて、融解熱量のピークトップを示す温度をDSC融点とした。
厚さ2.0mmの純アルミニウム板(A-1050P)の表面をアセトンで脱脂した後、サンドブラストを行い、JIS B 1982に準拠して測定した表面粗度Ra値が2.0~3.0μmとなるように粗面化した。エアーブローにより表面のダストを除去した後、ノズル径1.0mmの重力式スプレーガンを用い、吹き付け圧力0.2MPaでスプレー塗装した。上記アルミニウム板上の塗膜を80~100℃で15分間乾燥した。その後、380℃で20分間焼成し、膜厚約20μmの塗膜を有する塗装板を作製した。
予めホットプレートで200℃にした塗装板上にPTFEリングを置き、その中に試験液(重量比で砂糖/小麦粉/純水=10/20/40)を流し入れた。試験液を200℃、7分間焼成した後、バネばかりを用いてPTFEリングを真上に引き上げ、試験液の固形物を塗装板から剥がした。非粘着性は試験後の試験板の外観(付着した焦げの量、焦げのこびり付き方)で評価した。
1点 試験液の固形物が全部試験板に残り、剥がれなかった。
2点 試験液の固形物が全部試験板に残ったが、爪で擦ると剥がすことができた。
3点 試験液の固形物の一部が試験板に残ったが、爪で擦ると剥がすことができた。
4点 試験液の固形物の一部が試験板に残ったが、指で擦ると剥がすことができた。
5点 試験板に固形物はほとんど残らなかった。
室温又は200℃のホットステージを取り付けた鉛筆硬度試験機を用いて、塗膜が破れて基材が露出しない最も硬い鉛筆の硬度を鉛筆硬度(基材剥離硬度)とした。結果を表に示す。表中のF、2B等の記号は、鉛筆の硬度記号を表す。6B未満とは、6Bよりも硬度が低いことを意味する。
スリーエム社製工業用パッド(商品名:スコッチ・ブライト7447C)を3cm平方にカットし、5%中性洗剤を1cc垂らし、荷重4.5kgで往復運動させ、1000往復毎にパッド交換を行い、基材が露出するまでの往復回数により評価した。
JIS K5400に準拠した(セロハンテープ剥離を10回繰り返した)。
ポリアミドイミド樹脂(以下、PAI)ワニス(PAI(固形分)29質量部をN-メチル-2-ピロリドン71質量部に溶解させたもの)を水中に投入してボールミル中で所定時間粉砕して平均粒子径2μmの分散体(以下、PAI水性分散体)を得た。得られた分散体の固形分は20質量%であった。
純水118g、濃度20質量%のポリエーテル系非イオン性界面活性剤40g、カーボンブラック40g、ジエチルエタノールアミンを2.2g添加して混合物を作成した。その後、サンドミルを用いて所定時間粉砕して、カーボンブラック水性分散体を得た。得られた分散体の固形分は20質量%であった。
純水61g、濃度20質量%のポリエーテル系非イオン性界面活性剤30g、硫酸バリウム35gを順に添加して混合物を作成した。その後、サンドミルを用いて所定時間粉砕して、硫酸バリウム水性分散体を得た。得られた分散体の固形分は28質量%であった。
カーボンブラック水性分散体に、PTFE水性分散体(PTFEの融点344℃、平均粒子径0.28μm、固形分60質量%、PTFEは非溶融加工性)、低分子量PTFE水性分散体(低分子量PTFEの融点327℃、平均粒子径0.26μm、固形分40質量%)を加えた。その後PAI水性分散体、硫酸バリウム水性分散体、炭化ケイ素(平均粒子径18μm、新モース硬度13)を加えた。次に、増粘剤としてメチルセルロースを固形分に対して0.7質量%、分散安定剤としてポリオキシエチレントリデシルエーテル(HLB=10)を固形分に対して6質量%添加して攪拌し、固形分24質量%の水性分散液を得た。各実施例及び比較例の各成分の質量比を表1に示す。炭化ケイ素の質量比は実施例1~2及び比較例1~5において3.5であった。
カーボンブラック水性分散体に、PTFE水性分散体(PTFEの融点344℃、平均粒子径0.28μm、固形分60質量%、PTFEは非溶融加工性)、PFA水性分散体(PFAの融点310℃、平均粒子径0.37μm、固形分50質量%)を加えた。その後PAI水性分散体、硫酸バリウム水性分散体、炭化ケイ素(平均粒径18μm、新モース硬度13)を加えた。次に、増粘剤としてメチルセルロースを固形分に対して0.7質量%、分散安定剤としてポリオキシエチレントリデシルエーテル(HLB=10)を固形分に対して6質量%添加して攪拌し、固形分24質量%の水性分散液を得た。各実施例及び比較例の各成分の質量比を表2に示す。炭化ケイ素の質量比は実施例3~5及び比較例6~10において3.5であった。
Claims (9)
- 非溶融加工性ポリテトラフルオロエチレン、含フッ素重合体(但し、前記非溶融加工性ポリテトラフルオロエチレンを除く)、及び、耐熱性樹脂(但し、前記非溶融加工性ポリテトラフルオロエチレン及び前記含フッ素重合体を除く)を含み、前記非溶融加工性ポリテトラフルオロエチレンの含有量が、前記含フッ素重合体に対して10~60質量%であることを特徴とする塗料組成物。
- 含フッ素重合体は、低分子量ポリテトラフルオロエチレンである請求項1記載の塗料組成物。
- 含フッ素重合体は、テトラフルオロエチレン/パーフルオロ(アルキルビニルエーテル)共重合体、及び、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からなる群より選択される少なくとも1種である請求項1又は2記載の塗料組成物。
- 耐熱性樹脂は、連続使用可能温度が150℃以上である請求項1、2又は3記載の塗料組成物。
- 耐熱性樹脂は、ポリアミドイミド樹脂、ポリイミド樹脂、ポリエーテルスルホン樹脂、ポリエーテルイミド樹脂、ポリエーテルエーテルケトン樹脂、芳香族ポリエステル樹脂及びポリアリレンサルファイド樹脂からなる群より選択される少なくとも1種である請求項1、2、3又は4記載の塗料組成物。
- 更に、新モース硬度が7以上の充填材を含む請求項1、2、3、4又は5記載の塗料組成物。
- 充填材は、ダイヤモンド、フッ素化ダイヤモンド、コランダム、ケイ石、窒化ホウ素、炭化ホウ素、炭化ケイ素、シリカ、マイカ、クリソベリル、トパーズ、ベリル、ガーネット、石英、ガラスフレーク、溶融ジルコニア、炭化タンタル、チタンカーバイド、アルミナ、及び、タングステンカーバイドからなる群より選択される少なくとも1種である請求項6記載の塗料組成物。
- 更に、水を含む請求項1、2、3、4、5、6又は7記載の塗料組成物。
- 基材、及び、前記基材上に形成された請求項1、2、3、4、5、6、7又は8記載の塗料組成物からなる塗膜を有することを特徴とする被覆物品。
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US15/552,332 US10407588B2 (en) | 2015-03-13 | 2016-02-19 | Coating composition and coated article |
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Also Published As
Publication number | Publication date |
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JPWO2016147790A1 (ja) | 2017-10-05 |
EP3269786A1 (en) | 2018-01-17 |
US20180037765A1 (en) | 2018-02-08 |
EP3269786A4 (en) | 2018-08-08 |
JP6406428B2 (ja) | 2018-10-17 |
KR102021683B1 (ko) | 2019-09-16 |
EP3269786B1 (en) | 2021-06-02 |
CN107406719B (zh) | 2020-07-03 |
US10407588B2 (en) | 2019-09-10 |
CN107406719A (zh) | 2017-11-28 |
ES2876942T3 (es) | 2021-11-15 |
KR20170107021A (ko) | 2017-09-22 |
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