WO2016068103A1 - 撥水撥油コーティング組成物 - Google Patents
撥水撥油コーティング組成物 Download PDFInfo
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- WO2016068103A1 WO2016068103A1 PCT/JP2015/080176 JP2015080176W WO2016068103A1 WO 2016068103 A1 WO2016068103 A1 WO 2016068103A1 JP 2015080176 W JP2015080176 W JP 2015080176W WO 2016068103 A1 WO2016068103 A1 WO 2016068103A1
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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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/48—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms
- C08G77/58—Metal-containing linkages
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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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/14—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers in which at least two but not all the silicon atoms are connected by linkages other than oxygen 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
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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
- C09D5/16—Antifouling paints; Underwater 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
- C09D7/20—Diluents or solvents
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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
- 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
- C09D7/63—Additives non-macromolecular organic
Definitions
- the present invention relates to a water / oil repellent coating composition that forms a film capable of imparting water / oil repellency to various substrates.
- droplets adhere to the surface of the base material. Problems such as performance degradation due to corrosion may occur. Therefore, in these fields, it is required that the substrate surface has good water and oil repellency, and in particular, not only prevents the droplets from adhering to the substrate surface, but also prevents the adhered droplets from adhering. There is also a need for easy removal.
- Patent Document 1 proposes a solution containing an organic silane and a metal alkoxide, and further containing an organic solvent, water, and a catalyst.
- an object of the present invention is to provide a water / oil repellent coating composition that forms a film that can achieve both water and oil repellency and wear resistance.
- the present invention has been completed.
- the water / oil repellent coating composition according to the present invention is an organosilicon compound (A) in which at least one first hydrocarbon chain-containing group and at least one hydrolyzable group are bonded to a silicon atom. And at least one hydrolyzable group is bonded to the metal atom, and a second hydrocarbon chain-containing group having a length shorter than that of the first hydrocarbon chain-containing group is bonded to the metal atom.
- a molar ratio of the metal compound (B) and the organosilicon compound (A) (metal compound (B) / organosilicon compound (A)) is 18 or more and 48 or less. It is characterized by that.
- the molar ratio of the metal compound (B) and the organosilicon compound (A) is preferably 18 or more and 36 or less.
- the water / oil repellent coating composition of the present invention further contains a solvent (C).
- the solvent (C) preferably contains an alcohol solvent.
- the organosilicon compound (A) is preferably represented by the following formula (I).
- R a represents a first hydrocarbon group
- the plurality of A a1 each independently represents a hydrolyzable group.
- Z a1 represents a first hydrocarbon chain-containing group, a second hydrocarbon chain-containing group having a shorter length than the first hydrocarbon chain-containing group, or a hydrolyzable group
- Z a1 represents the first R a and Z a1 may be the same or different, and when Z a1 is a hydrolyzable group, Z a1 and A a1 may be the same. May be different. Further, R a and Z a1 may be the same or different among the plurality of formulas (I). ]
- the metal compound (B) is preferably represented by the following formula (II).
- R b1 represents a second hydrocarbon chain-containing group or a hydrolyzable group.
- a b1 independently represents a hydrolyzable group.
- M represents Al, Fe, In, Ge, Hf, Si, Ti, Sn, Zr, or Ta.
- m represents an integer of 1 to 4 depending on the metal atom.
- R b1 and A b1 are preferably the same group, and M is preferably Si.
- the water / oil repellent coating composition of the present invention comprises an organosilicon compound in which a hydrocarbon chain-containing group and a hydrolyzable group are bonded to a silicon atom, and a metal compound in which the hydrolyzable group is bonded to a metal atom. Since the molar ratio is adjusted to a specific range, both water and oil repellency and wear resistance can be achieved.
- the water / oil repellent coating composition of the present invention comprises an organosilicon compound (A) in which at least one first hydrocarbon chain-containing group and at least one hydrolyzable group are bonded to a silicon atom, and at least One hydrolyzable group is bonded to the metal atom, and a second hydrocarbon chain-containing group in which the hydrocarbon chain portion has fewer carbon atoms than the first hydrocarbon chain-containing group is bonded to the metal atom.
- a good metal compound (B) From such a water / oil repellent coating composition, a hydrolyzable group bonded to a silicon atom or a metal atom is hydrolyzed and polycondensed to form a coating film, and the coating film forms this coating film.
- the first hydrocarbon chain-containing group is bonded to a part of the silicon atoms to be bonded.
- the first hydrocarbon chain-containing group imparts water / oil repellency to the coating film, and the element (for example, the metal atom) to which the first hydrocarbon chain-containing group is not bonded is coated. It will function substantially as a spacer in the film.
- the molar ratio of the organosilicon compound (A) to the metal compound (B) is adjusted to a specific range. Since the hydrogen chain-containing group and the spacer are present in a specific ratio, a water- and oil-repellent function can be enhanced, and at the same time, a coating film having excellent wear resistance can be provided.
- the first hydrocarbon chain-containing group bonded to a central silicon atom is a monovalent group containing a hydrocarbon chain, and the coating obtained by this hydrocarbon chain Water / oil repellency is imparted to the film interface (surface).
- the coefficient of friction between the droplets (water droplets, oil droplets, etc.) and the coating film becomes small, and the droplets easily move.
- the first hydrocarbon chain-containing group is usually composed of only a hydrocarbon group (hydrocarbon chain). If necessary, a part of the methylene group (—CH 2 —) of the hydrocarbon chain is an oxygen atom. May be replaced. Even a group partially substituted with an oxygen atom in this manner is classified as a hydrocarbon chain-containing group because a hydrocarbon chain exists in the remaining part.
- the methylene group (—CH 2 —) adjacent to the Si atom is not replaced with an oxygen atom, and two consecutive methylene groups (—CH 2 —) are not replaced with an oxygen atom at the same time.
- the first hydrocarbon chain-containing group will be described using an oxygen-unsubstituted hydrocarbon chain-containing group (that is, a monovalent hydrocarbon group) as an example.
- Part of the group (—CH 2 —) can be replaced with an oxygen atom.
- the number of carbon atoms is preferably 6 or more and 20 or less, more preferably 7 or more and 17 or less, and even more preferably. Has 8 or more and 15 or less carbon atoms.
- the first hydrocarbon chain-containing group (in the case of a hydrocarbon group) may be branched or linear. Further, the first hydrocarbon chain-containing group (in the case of a hydrocarbon group) is preferably a saturated or unsaturated aliphatic hydrocarbon chain-containing group, and more preferably a saturated aliphatic hydrocarbon chain-containing group. preferable.
- the saturated aliphatic hydrocarbon chain-containing group (in the case of a hydrocarbon group) is more preferably a saturated aliphatic hydrocarbon group.
- Saturated aliphatic hydrocarbon groups include, for example, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, Nonadecyl group, icosyl group and the like are included.
- the number of the first hydrocarbon chain-containing group bonded to the central silicon atom is usually 1 or more, preferably 2 or less, and particularly preferably 1.
- the hydrolyzable group of the organosilicon compound (A) may be any group that gives a hydroxy group (silanol group) by hydrolysis.
- it has 1 carbon atom such as a methoxy group, an ethoxy group, a propoxy group, or a butoxy group.
- Preferred examples thereof include an alkoxy group of 1 to 4, a hydroxy group, an acetoxy group, a chlorine atom, an isocyanate group, and the like.
- an alkoxy group having 1 to 4 carbon atoms is preferable, and an alkoxy group having 1 to 2 carbon atoms is more preferable.
- the number of hydrolyzable groups bonded to the central silicon atom is usually 1 or more, preferably 2 or more, and usually 3 or less.
- the silicon atom of the organosilicon compound (A) has a smaller number of carbon atoms in the hydrocarbon chain portion than the first hydrocarbon group-containing group.
- the second hydrocarbon chain-containing group may be bonded.
- the second hydrocarbon chain-containing group only needs to be shorter than the first hydrocarbon chain-containing group.
- the length of the first and second hydrocarbon chain-containing groups is the longest straight chain (hereinafter, also referred to as “main chain”) including an element bonded to a metal atom such as Si among the hydrocarbon chain-containing groups. It can be evaluated as a length (longest chain length).
- the number of carbon atoms in the hydrocarbon chain portion is the first hydrocarbon chain portion.
- the number of carbon atoms is preferably less than the number of carbon atoms.
- the second hydrocarbon chain-containing group is composed of only a hydrocarbon group (hydrocarbon chain) as in the case of the first hydrocarbon chain-containing group.
- the group (—CH 2 —) may be a group in which an oxygen atom is replaced.
- the methylene group (—CH 2 —) adjacent to the Si atom is not replaced with an oxygen atom, and two consecutive methylene groups (—CH 2 —) are not replaced with an oxygen atom at the same time.
- the carbon number of the hydrocarbon chain portion means the number of carbon atoms constituting the hydrocarbon group (hydrocarbon chain) in the oxygen non-substituted hydrocarbon chain-containing group, and includes the oxygen-substituted hydrocarbon chain. In the group, the number of carbon atoms is assumed assuming that the oxygen atom is a methylene group (—CH 2 —).
- the second hydrocarbon chain-containing group will be described by taking an oxygen non-substituted hydrocarbon chain-containing group (that is, a monovalent hydrocarbon group) as an example. Part of the group (—CH 2 —) can be replaced with an oxygen atom.
- the number of carbon atoms is preferably 1 or more and 5 or less, more preferably 1 or more and 3 or less. Further, the second hydrocarbon chain-containing group (in the case of a hydrocarbon group) may be branched or linear.
- the second hydrocarbon chain-containing group (in the case of a hydrocarbon group) is preferably a saturated or unsaturated aliphatic hydrocarbon chain-containing group, and more preferably a saturated aliphatic hydrocarbon chain-containing group.
- the saturated aliphatic hydrocarbon chain-containing group (in the case of a hydrocarbon group) is more preferably a saturated aliphatic hydrocarbon group. Examples of the saturated aliphatic hydrocarbon group include a methyl group, an ethyl group, a propyl group, a butyl group, and a pentyl group.
- the hydrocarbon group is preferably a saturated aliphatic hydrocarbon group, and a partial methylene group (— Specific examples of the group in which CH 2 —) is replaced by an oxygen atom include a group having a (poly) ethylene glycol unit.
- the number of the second hydrocarbon chain-containing groups bonded to the central silicon atom is preferably 2 or less, more preferably 1 or less, and particularly preferably 0.
- the organosilicon compound (A) is preferably a compound represented by the following formula (I).
- R a represents a first hydrocarbon chain-containing group, and a plurality of A a1 each independently represents a hydrolyzable group.
- Z a1 represents a first hydrocarbon chain-containing group, a second hydrocarbon chain-containing group, or a hydrolyzable group, and when Z a1 is the first hydrocarbon chain-containing group, R a and Z a1 May be the same or different, and when Z a1 is a hydrolyzable group, Z a1 and A a1 may be the same or different. Further, R a and Z a1 may be the same or different among the plurality of formulas (I). ]
- the first hydrocarbon chain-containing group, the second hydrocarbon chains containing groups, hydrolyzable groups A a1, Z a1 of Z a1 of R a, Z a1 is first carbonized respectively
- the hydrogen chain-containing group, the second hydrocarbon chain-containing group, and the hydrolyzable group can be appropriately selected from the ranges described above.
- Z a1 is preferably a second hydrocarbon chain-containing group or a hydrolyzable group, and more preferably a hydrolyzable group.
- the organosilicon compound (A) includes a compound having one first hydrocarbon chain-containing group and three hydrolyzable groups; one first hydrocarbon chain-containing group and one second carbonization.
- Preferred examples include compounds having a hydrogen chain-containing group and two hydrolyzable groups;
- the three hydrolyzable groups are bonded to a silicon atom.
- the group in which three hydrolyzable groups are bonded to a silicon atom include trialkoxysilyl groups such as a trimethoxysilyl group, a triethoxysilyl group, a tripropoxysilyl group, and a tributoxysilyl group; a trihydroxysilyl group; Acetoxysilyl group; trichlorosilyl group; triisocyanatesilyl group; and the like, and a compound in which one first hydrocarbon chain-containing group selected from the above-described range is bonded to the silicon atom of these groups Is exemplified as a compound having one first hydrocarbon chain-containing group and three hydrolyzable groups.
- one second hydrocarbon chain-containing group In a compound having one first hydrocarbon chain-containing group, one second hydrocarbon chain-containing group, and two hydrolyzable groups, one second hydrocarbon chain-containing group, two The hydrolyzable group is bonded to the silicon atom.
- the group in which one second hydrocarbon chain-containing group and two hydrolyzable groups are bonded to a silicon atom include methyldimethoxysilyl group, ethyldimethoxysilyl group, methyldiethoxysilyl group, ethyldiethoxysilyl group Groups, alkyldialkoxysilyl groups such as methyldipropoxysilyl group; and the like, and the first hydrocarbon chain-containing group selected from the above-described range is bonded to the silicon atom of these groups.
- the compound is exemplified as a compound having one first hydrocarbon chain-containing group, one second hydrocarbon chain-containing group, and two hydrolyzable groups.
- the compound having one first hydrocarbon chain-containing group and three hydrolyzable groups include alkyltrimethoxysilane having an alkyl group having 6 to 20 carbon atoms, and 6 to 20 carbon atoms.
- An alkyltrialkoxysilane having an alkyl group having 6 to 20 carbon atoms such as an alkyltriethoxysilane having an alkyl group of 6; an alkyltrihydroxysilane having an alkyl group having 6 to 20 carbon atoms; an alkyl group having 6 to 20 carbon atoms;
- specific examples of the compound having one first hydrocarbon chain-containing group, one second hydrocarbon chain-containing group, and two hydrolyzable groups include 6 to 20 carbon atoms.
- Alkylmethyldialkoxysilanes such as alkylmethyldimethoxysilane having an alkyl group and alkylmethyldiethoxysilane having an alkyl group having 6 to 20 carbon atoms; alkylmethyldihydroxysilane having an alkyl group having 6 to 20 carbon atoms; Alkylmethyldiacetoxysilane having an alkyl group of ⁇ 20; alkylmethyldichlorosilane having an alkyl group of 6 to 20 carbon atoms; alkylmethyl diisocyanate silane having an alkyl group of 6 to 20 carbon atoms; and the like.
- a compound having one first hydrocarbon chain-containing group and three hydrolyzable groups is preferable, and alkyltrialkoxysilane is more preferable.
- the metal compound (B) contained in the water / oil repellent coating composition together with the organosilicon compound (A) is one in which at least one hydrolyzable group is bonded to a central metal atom, and the second carbonization A hydrogen chain-containing group may be bonded to the metal atom.
- the longest chain length of the second hydrocarbon chain-containing group is shorter than the longest chain length of the first hydrocarbon chain-containing group bonded to the central silicon atom of the organosilicon compound (A), and the longest chain length of the metal compound (B) The longest chain length is shorter than the longest chain length of the organosilicon compound.
- the structure derived from the metal compound (B) is less bulky than the structure derived from the organosilicon compound (A), and can be obtained by including the metal compound (B) in the water / oil repellent coating composition.
- a part having a spacer function can be formed in the coating film.
- the central metal atom of the metal compound (B) may be any metal atom that can be bonded to an alkoxy group to form a metal alkoxide.
- the metal includes a semimetal such as Si or Ge.
- Specific examples of the central metal atom of the metal compound (B) include trivalent metals such as Al, Fe, and In; tetravalent metals such as Ge, Hf, Si, Ti, Sn, and Zr; pentavalent metals such as Ta. And the like, preferably trivalent metals such as Al; tetravalent metals such as Si, Ti, Zr and Sn; more preferably Al, Si, Ti and Zr, still more preferably Si. is there.
- hydrolyzable group of the metal compound (B) examples include those similar to the hydrolyzable group of the organosilicon compound (A), preferably an alkoxy group having 1 to 4 carbon atoms, and an alkoxy group having 1 to 2 carbon atoms. Groups are more preferred.
- the hydrolyzable groups of the organosilicon compound (A) and the metal compound (B) may be the same or different. Further, the hydrolyzable groups of the organosilicon compound (A) and the metal compound (B) are preferably alkoxy groups having 1 to 4 carbon atoms.
- the number of hydrolyzable groups is preferably 1 or more, more preferably 2 or more, still more preferably 3 or more, and preferably 4 or less.
- the second hydrocarbon chain-containing group of the metal compound (B) can be appropriately selected from the range described above, and the number thereof is preferably 1 or less, and particularly preferably 0.
- the metal compound (B) is preferably a compound represented by the following formula (II).
- R b1 represents a second hydrocarbon chain-containing group or a hydrolyzable group.
- a b1 independently represents a hydrolyzable group.
- M represents Al, Fe, In, Ge, Hf, Si, Ti, Sn, Zr, or Ta.
- m represents an integer of 1 to 4 depending on the metal atom.
- hydrolysable groups A b1 of R b1 are respectively, the above-described second hydrocarbon chains containing group, a hydrolyzable group Can be selected as appropriate.
- R b1 is preferably a hydrolyzable group.
- R b1 and A b1 may be the same or different and are preferably the same.
- the hydrolyzable groups of the organosilicon compound (A) and the metal compound (B) may be the same or different.
- M is preferably Al, Si, Ti, Zr, or Sn, more preferably Al, Si, Ti, or Zr, and even more preferably Si.
- These alkoxides of metal atoms can be easily liquefied, and it is easy to improve the uniformity of distribution of the following structure (b) that can function as a spacer in the coating film.
- m represents 2 when M is a trivalent metal such as Al, Fe, or In, and M is a tetravalent metal such as Ge, Hf, Si, Ti, Sn, or Zr.
- Preferred examples of the metal compound (B) include a compound having only a hydrolyzable group; a compound having one second hydrocarbon chain-containing group and two hydrolyzable groups;
- Examples of the compound having only a hydrolyzable group include tetraalkoxysilanes such as tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane, and tetrabutoxysilane; trialkoxyaluminums such as triethoxyaluminum, tripropoxyaluminum, and tributoxyaluminum; triethoxy Trialkoxy iron such as iron; trialkoxy indium such as trimethoxy indium, triethoxy indium, tripropoxy indium and tributoxy indium; tetraalkoxy germanium such as tetramethoxy germanium, tetraethoxy germanium, tetrapropoxy germanium and tetrabutoxy germanium; tetra Meth
- the water / oil repellent coating composition of the present invention contains the organosilicon compound (A) and the metal compound (B) in a specific ratio, the water / oil repellent function is enhanced and the hardness is also excellent. It is possible to provide a coating film.
- the molar ratio of the metal compound (B) to the organosilicon compound (A) (metal compound (B) / organosilicon compound (A)) is 18 As described above, it is 48 or less, preferably 44 or less, more preferably 40 or less, and further preferably 36 or less.
- the water / oil repellent coating composition of the present invention may further contain a solvent (C) in addition to the organosilicon compound (A) and the metal compound (B).
- the solvent (C) include hydrophilic organic solvents such as alcohol solvents, ether solvents, ketone solvents, ester solvents, and amide solvents. One of these solvents may be used alone, or two or more of these solvents may be used in combination.
- the alcohol solvent include methanol, ethanol, propanol, butanol, ethylene glycol, propylene glycol, and diethylene glycol.
- the ether solvent include dimethoxyethane, tetrahydrofuran, and dioxane.
- ketone solvent examples include Acetone, methyl ethyl ketone and the like, ester solvents such as ethyl acetate and butyl acetate, and amide solvents such as dimethylformamide and the like.
- alcohol solvents and ether solvents are preferable, and alcohol solvents are more preferable.
- the solvent (C) is preferably 120 parts by mass or less, more preferably 80 parts by mass or less, further preferably 60 parts by mass or less, with respect to 1 part by mass in total of the organosilicon compound (A) and the metal compound (B).
- the amount is particularly preferably 40 parts by mass or less, preferably 3 parts by mass or more, more preferably 5 parts by mass or more, further preferably 10 parts by mass or more, and particularly preferably 20 parts by mass or more.
- the water / oil repellent coating composition of the present invention may coexist with a catalyst, if necessary.
- the catalyst can be arbitrarily selected from acidic compounds such as hydrochloric acid, basic compounds, organometallic compounds and the like that are generally used in the sol-gel method.
- the acidic compound include inorganic acids such as hydrochloric acid and nitric acid; organic acids such as acetic acid;
- Examples of the basic compound include ammonia, amines, and the like.
- organometallic compound examples include organometallic compounds having a metal element such as Al, Fe, Zn, Sn, and Zr as a central metal, and organoaluminum compounds such as an aluminum acetylacetone complex and an aluminum ethylacetoacetate complex; iron octylate Organic zinc compounds such as zinc acetylacetonate monohydrate, zinc naphthenate and zinc octylate; organic tin compounds such as dibutyltin diacetate complex; and the like.
- an organometallic compound is preferable, an organoaluminum compound is more preferable, and an organoaluminum ethyl acetoacetate compound is particularly preferable.
- the catalyst is preferably 0.0001 part by mass or more, more preferably 0.1 part by mass or more, and still more preferably 0 with respect to 100 parts by mass in total of the organosilicon compound (a) and the metal compound (b). .5 parts by mass or more, particularly preferably 1 part by mass or more, preferably 20 parts by mass or less, more preferably 10 parts by mass or less, and further preferably 5 parts by mass or less.
- the acidic compound is 0.0001 part by mass or more with respect to 100 parts by mass in total of the organosilicon compound (A) and the metal compound (B). Is more preferably 0.0005 parts by mass or more, still more preferably 0.001 parts by mass or more, preferably 1 part by mass or less, more preferably 0.5 parts by mass or less, and still more preferably 0.00. 3 parts by mass or less.
- the antioxidant when the organosilicon compound (A) and the metal compound (B) are brought into contact with the base material, the antioxidant, the rust inhibitor, the ultraviolet absorber, the light stabilizer, the antibacterial agent within the range that does not impair the effects of the present invention.
- Various additives such as fungicides, antibacterial agents, biological adhesion inhibitors, deodorants, pigments, flame retardants and antistatic agents may coexist.
- antioxidants examples include phenol-based antioxidants, sulfur-based antioxidants, phosphorus-based antioxidants, hindered amine-based antioxidants, and the like.
- phenolic antioxidant examples include n-octadecyl-3- (4-hydroxy-3,5-di-t-butylphenyl) propionate, 2,6-di-t-butyl-4-methylphenol, 2, 2-thio-diethylene-bis- [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate], tri-ethylene glycol-bis- [3- (3-t-butyl-5-methyl -4-hydroxyphenyl) propionate], 3,9-bis [2- ⁇ 3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy ⁇ -1,1-dimethylethyl] -2, 4,8,10-tetraoxaspiro [5.5] undecane, tetrakis ⁇ 3- (3,5-di-tert-butyl-4-hydroxyphenyl) -propionic acid ⁇ pentaeryth Cyl ester, 2-t-butyl-6-
- sulfur-based antioxidant examples include 3,3′-thiodipropionic acid di-n-dodecyl ester, 3,3′-thiodipropionic acid di-n-tetradecyl ester, and 3,3′-thiodipropion.
- examples include acid di-n-octadecyl ester and tetrakis (3-dodecylthiopropionic acid) pentaerythritol ester.
- Examples of the phosphorus antioxidant include tris (2,4-di-t-butylphenyl) phosphite, bis (2,4-di-t-butylphenyl) pentaerythritol diphosphite, bis (2,6-di-).
- t-butyl-4-methylphenyl) pentaerythritol diphosphite bis (2,4-di-cumylphenyl) pentaerythritol diphosphite, tetrakis (2,4-di-t-butylphenyl) -4,4'-biphenylene diphosphonite, bis -[2,4-di-t-butyl- (6-methyl) phenyl] ethyl phosphite and the like.
- hindered amine antioxidant examples include sebacic acid bis (2,2,6,6-tetramethyl-4-piperidyl) ester (melting point: 81 to 86 ° C.), 2,2,6,6-tetramethyl-4- Piperidyl methacrylate (melting point: 58 ° C.), poly [ ⁇ 6- (1,1,3,3-tetramethylbutyl) amino-1,3,5-triazine-2,4-diyl ⁇ ⁇ (2,2,6, 6-tetramethyl-4-piperidyl) imino ⁇ -1,6-hexamethylene ⁇ (2,2,6,6-tetramethyl-4-piperidyl) imino ⁇ ] and the like.
- the rust inhibitor examples include alkanolamines such as triethanolamine; quaternary ammonium salts; alkanethiols; imidazoles such as imidazoline, imidazole, alkylimidazoline derivatives, benzimidazole, 2-mercaptobenzimidazole, and benzotriazole; metavanadic acid Sodium; bismuth citrate; phenol derivatives; aliphatic amines such as alkylamines and polyalkenylamines, aromatic amines, ethoxylated amines, cyanoalkylamines, cyclohexylamine benzoate, aliphatic diamines such as alkylenediamine, aromatic diamines, etc.
- alkanolamines such as triethanolamine
- quaternary ammonium salts such as imidazoline, imidazole, alkylimidazoline derivatives, benzimidazole, 2-mercaptobenzimidazole, and benzotri
- Examples of the ultraviolet absorber / light stabilizer include 2- (5-methyl-2-hydroxyphenyl) benzotriazole, 2- [2-hydroxy-3,5-bis ( ⁇ , ⁇ -dimethylbenzyl) phenyl].
- Examples of the fungicide / antibacterial agent include 2- (4-thiazolyl) benzimidazole, sorbic acid, 1,2-benzisothiazolin-3-one, (2-pyridylthio-1-oxide) sodium, dehydroacetic acid, 2-methyl -5-chloro-4-isothiazolone complex, 2,4,5,6-tetrachlorophthalonitrile, methyl 2-benzimidazole carbamate, methyl 1- (butylcarbamoyl) -2-benzimidazole carbamate, mono or dibromocyano
- Examples include acetamides, 1,2-dibromo-2,4-dicyanobutane, 1,1-dibromo-1-nitropropanol and 1,1-dibromo-1-nitro-2-acetoxypropane.
- biological adhesion inhibitor examples include tetramethylthiuram disulfide, bis (N, N-dimethyldithiocarbamate) zinc, 3- (3,4-dichlorophenyl) -1,1-dimethylurea, dichloro-N-((dimethylamino ) Sulfonyl) fluoro-N- (P-tolyl) methanesulfenamide, pyridine-triphenylborane, N, N-dimethyl-N′-phenyl-N ′-(fluorodichloromethylthio) sulfamide, cuprous thiocyanate ( 1), cuprous oxide, tetrabutylthiuram disulfide, 2,4,5,6-tetrachloroisophthalonitrile, zinc ethylenebisdithiocarbamate, 2,3,5,6-tetrachloro-4- (methyl) Sulfonyl) pyridine, N- (2,4,6-trichloroph
- deodorizer examples include lactic acid, succinic acid, malic acid, citric acid, maleic acid, malonic acid, ethylenediaminepolyacetic acid, alkane-1,2-dicarboxylic acid, alkene-1,2-dicarboxylic acid, cycloalkane-1 , 2-dicarboxylic acid, cycloalkene-1,2-dicarboxylic acid, organic acids such as naphthalenesulfonic acid; fatty acid metals such as zinc undecylenate, zinc 2-ethylhexanoate, zinc ricinoleate; iron oxide, iron sulfate, Zinc oxide, zinc sulfate, zinc chloride, silver oxide, copper oxide, metal (iron, copper, etc.) chlorophyllin sodium, metal (iron, copper, cobalt etc.) phthalocyanine, metal (iron, copper, cobalt etc.) tetrasulfonic acid phthalocyanine, Metal compounds such as titanium dioxide, visible light responsive
- the pigment examples include carbon black, titanium oxide, phthalocyanine pigment, quinacridone pigment, isoindolinone pigment, perylene or perine pigment, quinophthalone pigment, diketopyrrolo-pyrrole pigment, dioxazine pigment, disazo condensation pigment, Examples include benzimidazolone pigments.
- flame retardant examples include decabromobiphenyl, antimony trioxide, phosphorus flame retardant, aluminum hydroxide and the like.
- antistatic agent examples include quaternary ammonium salt type cationic surfactants, betaine type amphoteric surfactants, alkyl phosphate type anionic surfactants, primary amine salts, secondary amine salts, thirds.
- Cationic surfactants such as quaternary amine salts, quaternary amine salts and pyridine derivatives, sulfated oils, soaps, sulfated ester oils, sulfated amide oils, sulfated ester salts of olefins, fatty alcohol sulfate esters, alkyl sulfates
- Anionic surfactants such as ester salts, fatty acid ethyl sulfonates, alkyl naphthalene sulfonates, alkyl benzene sulfonates, oxalate sulfonates and phosphate ester salts, partial fatty acid esters of polyhydric alcohols, fatty alcohol
- additives lubricants, fillers, plasticizers, nucleating agents, antiblocking agents, foaming agents, emulsifiers, brighteners, binders, and the like may coexist.
- the content of the additives is usually 0.1 to 70% by mass in the coating composition containing the organosilicon compound (A) and the metal compound (B), preferably 0.8. It is 1 to 50% by mass, more preferably 0.5 to 30% by mass, and further preferably 2 to 15% by mass.
- the total content of the organosilicon compound (A) and the metal compound (B) (when the solvent (C) is included, the total content of the organosilicon compound (A), the metal compound (B), and the solvent (C)) is In the water / oil repellent coating composition, it is usually 60% by mass or more, preferably 75% by mass or more, more preferably 85% by mass or more, and further preferably 95% by mass or more.
- the water / oil repellent coating composition of the present invention has one first hydrocarbon chain-containing group having 7 to 9 carbon atoms (especially 8) and three hydrolyzable groups on silicon atoms.
- the weight ratio of (A) (metal compound (B) / organosilicon compound (A)) is particularly preferably 18 or more and 36 or less.
- hydrolyzable groups of the organosilicon compound (A) and the metal compound (B) are hydrolyzed and polycondensed, and the surface of the substrate is water repellent.
- An oil repellent coating film is formed.
- a method for bringing the water / oil repellent coating composition into contact with the substrate for example, a method of coating the surface of the substrate with the water / oil repellent coating composition is preferable, and as such a coating method, a spin coating method, Examples include dip coating, spray coating, roll coating, bar coating, and die coating, and spin coating and spray coating are preferred.
- a spin coating method examples include dip coating, spray coating, roll coating, bar coating, and die coating, and spin coating and spray coating are preferred.
- the water- and oil-repellent coating composition is in contact with the substrate and left in the air, moisture in the air is taken in, and hydrolysis and polycondensation of the hydrolyzable groups are promoted. ,preferable.
- the obtained coating film may be further dried.
- the temperature for heating and drying is usually 40 to 250 ° C, preferably 60 to 200 ° C, more preferably 60 to 150 ° C.
- the obtained water / oil repellent coating film has a network skeleton in which silicon atoms or the above metal atoms (preferably only silicon atoms) are bonded via oxygen atoms, and the organic silicon compound (A) In other words, it has a structure in which the first hydrocarbon chain-containing group is bonded to some of the silicon atoms that form this skeleton.
- a structure (a) represented by the following formula (1) is preferable.
- R a represents a first hydrocarbon chain-containing group
- Z a2 represents a first hydrocarbon chain-containing group, a second hydrocarbon chain-containing group, or an —O— group.
- Z a2 is the first hydrocarbon chain-containing group
- R a and Z a2 may be the same or different
- R a and Z a2 are the same among the formulas (1) Or different.
- the first hydrocarbon chain-containing group of R a and Z a2 and the second hydrocarbon chain-containing group of Z a2 can be appropriately selected from the ranges described above.
- the second hydrocarbon chain-containing group or —O— group is preferable, and —O— group is particularly preferable.
- structures represented by the following formulas (1-1) to (1-32) can be preferably exemplified.
- the silicon atom derived from the metal compound (B) is different from the silicon atom to which the first hydrocarbon chain-containing group is bonded (
- a second hydrocarbon chain-containing group, a hydroxy group, an alkoxy group, or a group condensed with a hydroxy group may be bonded to the (second silicon atom).
- the second silicon atom may be replaced by another metal atom (for example, Al, Fe, In, Ge, Hf, Si, Ti, Sn, Zr, or Ta).
- These second silicon atoms and other metal atoms are also bonded to a second hydrocarbon chain-containing group, a hydroxy group, an alkoxy group, or a hydroxy group having a smaller number of carbon atoms than the first hydrocarbon chain-containing group. Therefore, it acts as a spacer, and it is possible to enhance the water / oil repellency improving effect by the first hydrocarbon chain-containing group.
- the alkoxy group preferably has 1 to 4 carbon atoms, more preferably 1 to 3 carbon atoms.
- a butoxy group, a propoxy group, an ethoxy group, a methoxy group, etc. are mentioned.
- the hydroxy group is condensed with another hydroxy group, an alkoxy group or the like to form an —O— group, and a group with such a hydroxy group condensed may be bonded to the metal atom.
- the structure in which the second hydrocarbon chain-containing group or hydroxy group is bonded to the second silicon atom or other metal atom is preferably a structure (b) represented by the following formula (2).
- R b2 represents a second hydrocarbon chain-containing group, hydroxy group or —O— group
- a b2 represents a hydroxy group or —O— group
- M represents Al, Fe, In, Ge, Hf, Si, Ti, Sn, Zr, or Ta.
- n represents an integer of 0 to 3 according to M.
- any of the second hydrocarbon chain-containing groups of R b2 can be appropriately selected from the range described above.
- R b2 is preferably a hydroxy group.
- M is preferably a trivalent metal such as Al; a tetravalent metal such as Si, Ti, Sn, or Zr; more preferably Al, Si, Ti, or Zr, and particularly preferably Si.
- n represents 1 when M is a trivalent metal such as Al, Fe, or In, and M is a tetravalent metal such as Ge, Hf, Si, Ti, Sn, or Zr. Represents 2 and represents 3 when M is a pentavalent metal such as Ta.
- the abundance ratio of the structure (a) to the structure (b) (structure (a) / structure (b)) is preferably 0.01 or more, more preferably 0, on a molar basis. 0.02 or more, more preferably 0.03 or more, preferably 0.3 or less, more preferably 0.2 or less, still more preferably 0.1 or less, and even more preferably 0.09 or less. .
- the coating film obtained using the water / oil repellent coating composition of the present invention preferably has a thickness of 50 nm or less, more preferably 40 nm or less. By setting the thickness of the coating film to 50 nm or less, the pencil hardness can be increased while maintaining the wear resistance. Moreover, it is preferable that the thickness of the coating film obtained is 6 nm or more. By setting the thickness of the coating film to 6 nm or more, water repellency and oil repellency are effectively exhibited.
- the coating film obtained from the water / oil repellent coating composition of the present invention has excellent hardness.
- the hardness of the coating film can be evaluated based on, for example, pencil hardness, and is preferably 2H or more, more preferably 4H or more, still more preferably 7H or more, and usually preferably 9H or less.
- the coating film obtained using the water / oil repellent coating composition of the present invention has a network skeleton in which silicon atoms or the above metal atoms (preferably only silicon atoms) are bonded via oxygen atoms. Since the first hydrocarbon chain-containing group is bonded to some of the silicon atoms that form this skeleton, the slipperiness of the droplets, as well as water and oil repellency are improved. Are better.
- the slipperiness of the droplets can be evaluated, for example, using the moving speed of the water droplets that slide down on the coating film formed on the smooth substrate placed at a fixed angle as an index.
- the coating film obtained using the coating composition preferably has a droplet moving speed of 5 cm / sec or more, more preferably 10 cm / sec or more when the substrate having the coating film is tilted by 32 °. More preferably, it is 15 cm / sec or more.
- the moving speed of the droplet here will be described.
- a substrate having a coating film is inclined by 32 °, and 20 ⁇ L of water droplets are dropped on the coating film (hereinafter, sometimes referred to as position (1)). Starting from the place where the droplet slipped 0.9 cm from the position (1) (hereinafter sometimes referred to as position (2)), it may be further referred to as the place (hereinafter referred to as position (3)) 3 cm. ) Measure the time required to move to.
- the moving speed of the droplet is obtained by dividing the moving distance 3 cm from the position (2) to the position (3) by the time required for the sliding from the position (2) to the position (3).
- a coating film can be formed, and the shape of the substrate may be either a flat surface or a curved surface, or a three-dimensional combination of many surfaces. It may be a mechanical structure.
- the substrate may be composed of any organic material or inorganic material.
- the organic material examples include acrylic resin, polycarbonate resin, polyester resin, styrene resin, acrylic-styrene copolymer resin, cellulose Thermoplastic resins such as resins, polyolefin resins, polyvinyl alcohol, etc .; thermosetting resins such as phenol resins, urea resins, melamine resins, epoxy resins, unsaturated polyesters, silicone resins, urethane resins; Are ceramics; glass; metals such as iron, silicon, copper, zinc, and aluminum; alloys containing the metals; The substrate may be subjected to an easy adhesion treatment in advance. Examples of the easy adhesion treatment include hydrophilic treatment such as corona treatment, plasma treatment, and ultraviolet treatment.
- primer treatment with a resin, a silane coupling agent, tetraalkoxysilane, or the like may be used.
- durability such as moisture resistance and alkali resistance can be further improved.
- the layer formed using the composition for base layer formation containing the component (P) which can form siloxane skeleton is preferable.
- the layer formed using the composition for base layer formation containing the (P1) component which consists of a compound represented by following formula (III) and / or its partial hydrolysis-condensation product, for example is preferable.
- Si (X P2 ) 4 (III) [In the formula (III), X P2 independently represents a halogen atom, an alkoxy group or an isocyanate group. ]
- X P2 is preferably a chlorine atom, an alkoxy group having 1 to 4 carbon atoms or an isocyanate group, and the four X P2 are preferably the same.
- compound (III) As such a compound represented by the above general formula (III) (hereinafter sometimes referred to as compound (III)), specifically, Si (NCO) 4 , Si (OCH 3 ) 4 , Si (OC 2). H 5 ) 4 and the like are preferably used.
- compound (III) may be used alone or in combination of two or more.
- the component (P1) contained in the primer layer forming composition may be a partially hydrolyzed condensate of compound (III).
- the partial hydrolysis-condensation product of compound (III) can be obtained by applying a general hydrolysis-condensation method using an acid or a base catalyst.
- the degree of condensation (degree of multimerization) of the partially hydrolyzed condensate needs to be such that the product is dissolved in the solvent.
- Component (P1) may be compound (III) or a partial hydrolysis condensate of compound (III), and a mixture of compound (III) and its partial hydrolysis condensate, for example, It may be a partially hydrolyzed condensate of compound (III) containing compound (III) of the reaction.
- a commercial item as a compound shown with general formula (III), and its partial hydrolysis-condensation product, It is possible to use such a commercial item for this invention.
- the underlayer-forming composition comprises the component (P1), a compound represented by the following formula (IV) (hereinafter sometimes referred to as compound (IV)) and / or a partially hydrolyzed condensate thereof. Or a partially hydrolyzed cocondensate of the component (P1) and the component (P2) (however, the component (P1) and / or the compound (IV) may be included).
- the composition may also be included.
- Compound (IV) is a compound having hydrolyzable silyl groups or silanol groups at both ends with a divalent organic group in between.
- Examples of the hydrolyzable group represented by X P3 in formula (IV) include the same groups or atoms as those of X P2 above.
- X P3 is preferably an alkoxy group or an isocyanate group, and particularly preferably an alkoxy group.
- the alkoxy group an alkoxy group having 1 to 4 carbon atoms is preferable, and a methoxy group or an ethoxy group is more preferable. These are appropriately selected and used according to the purpose of manufacture, application and the like.
- the X P3 to a plurality present in the compound (IV) may be different groups in the same group, it is preferable in terms of ease availability of the same group.
- compound (IV) specifically, (CH 3 O) 3 SiCH 2 CH 2 Si (OCH 3 ) 3 , (OCN) 3 SiCH 2 CH 2 Si (NCO) 3 , Cl 3 SiCH 2 CH 2 SiCl 3 include (C 2 H 5 O) 3 SiCH 2 CH 2 Si (OC 2 H 5) 3, (CH 3 O) 3 SiCH 2 CH 2 CH 2 CH 2 CH 2 Si (OCH 3) 3 , etc. .
- compound (IV) may be used alone or in combination of two or more.
- the component contained in the primer layer forming composition may be a partially hydrolyzed condensate of compound (IV).
- the partially hydrolyzed condensate of compound (IV) can be obtained by the same method as described in the production of the partially hydrolyzed condensate of compound (III).
- the degree of condensation (degree of multimerization) of the partially hydrolyzed condensate must be such that the product is dissolved in the solvent.
- Component (P) may be compound (IV) or a partial hydrolysis condensate of compound (III), and a mixture of compound (IV) and its partial hydrolysis condensate, for example, It may be a partially hydrolyzed condensate of compound (IV) containing compound (IV) of the reaction.
- various polysilazanes capable of obtaining an oxide film mainly composed of silicon similar to the compound (III) may be used for the underlayer.
- the primer layer-forming composition usually contains an organic solvent in addition to the solid content as a layer constituent component in consideration of economy, workability, ease of controlling the thickness of the resulting primer layer, and the like.
- the organic solvent is not particularly limited as long as it dissolves the solid content contained in the primer layer forming composition.
- an organic solvent the same compound as the composition for water-repellent film formation is mentioned.
- the organic solvent is not limited to one kind, and two or more kinds of solvents having different polarities and evaporation rates may be mixed and used.
- composition for forming a primer layer contains a partial hydrolysis condensate or a partial hydrolysis cocondensate, it may contain a solvent used for producing them.
- composition for forming a primer layer even if it does not contain a partial hydrolysis condensate or partial hydrolysis cocondensate, in order to promote the hydrolysis cocondensation reaction, It is also preferable to blend a catalyst such as an acid catalyst that is generally used. Even when a partially hydrolyzed condensate or a partially hydrolyzed cocondensate is included, when the catalyst used for the production thereof does not remain in the composition, it is preferable to add a catalyst.
- the underlayer-forming composition may contain water for the above-mentioned components to undergo a hydrolysis condensation reaction or a hydrolysis cocondensation reaction.
- the underlayer using the primer layer forming composition As a method for forming the underlayer using the primer layer forming composition, a known method for an organosilane compound-based surface treatment agent can be used.
- the composition for forming the underlayer is applied to the surface of the substrate by methods such as brush coating, flow coating, spin coating, dip coating, squeegee coating, spray coating, and hand coating, and is necessary in the air or in a nitrogen atmosphere.
- the base layer can be formed by curing after drying according to the above. Curing conditions are appropriately controlled depending on the type and concentration of the composition used.
- the primer layer forming composition may be cured simultaneously with the water repellent film forming composition.
- the thickness of the primer layer is not particularly limited as long as it can impart moisture resistance, adhesion, and barrier properties such as alkali from the substrate to the water-repellent film formed thereon.
- a coating film having both water and oil repellency and hardness can be provided.
- Display devices such as touch panel displays, optical elements, semiconductor elements, building materials, It is useful in the fields of automobile parts, nanoimprint technology, solar cell members and the like.
- the water / oil repellent coating composition of the present invention is also suitably used for articles such as bodies, window glass (front glass, side glass, rear glass), mirrors, bumpers and the like in transportation equipment such as trains, automobiles, ships and aircraft. .
- it can also be used for outdoor uses, such as a building outer wall, a tent, a solar power generation module, a sound insulation board, and concrete.
- It can also be used for fishing nets, insect nets, water tanks, and the like. Furthermore, it can be used for various indoor facilities such as kitchens, bathrooms, washstands, mirrors, toilet articles, ceramics such as chandeliers and tiles, artificial marble, and air conditioners. It can also be used for antifouling treatment of jigs, inner walls, piping, etc. in factories. It is also suitable for goggles, glasses, helmets, slingshots, textiles, umbrellas, play equipment, soccer balls and the like. Furthermore, it can also be used as an anti-adhesive agent for various packaging materials such as food packaging materials, cosmetic packaging materials, and the inside of pots.
- a substrate coated with a water- and oil-repellent coating composition was tilted at 32 °, 20 ⁇ L of water was dropped thereon, and the movement speed of the droplets was measured. Specifically, first, a droplet was dropped on the coating film (position (1)). The time (seconds) required to move from the position (1) to the place (position (3)) where the droplet slipped 0.9 cm from the place (position (2)) was measured. The moving speed of the droplet was determined by dividing the moving distance 3 cm from the position (2) to the position (3) by the time (seconds) required for the sliding from the position (2) to the position (3).
- a steel wool tester manufactured by Daiei Seiki Co., Ltd. was used.
- An eraser (Mono One Dust Catch manufactured by Dragonfly Pencil Co., Ltd.) was brought into contact with the coating film with a load of 500 g, and a wear test was performed at a speed of 40 r / min. The number of wear is up to 1500 times, and if it is within -15 ° even after 1500 times, it is evaluated as having wear resistance ( ⁇ ).
- the thickness of the coating film was measured with a non-contact surface shape measuring instrument (VertScan, manufactured by Ryoka Systems Inc.).
- the contact angle of water on the coating film surface with water was measured with a contact angle meter (DM700 manufactured by Kyowa Interface Science Co., Ltd.) by the droplet method (liquid amount: 3.0 ⁇ L).
- the obtained water / oil repellent coating composition was spin-coated on a glass substrate (“EAGLE XG” manufactured by Corning) using a spin coater manufactured by MIKASA under the conditions of a rotational speed of 3000 rpm for 20 seconds, and then dried to form a coating film.
- a glass substrate (“EAGLE XG” manufactured by Corning)
- MIKASA spin coater manufactured by MIKASA
- Example 2 to 4 and Comparative Examples 1 to 3 A coating film was obtained in the same manner as in Example 1 except that the types and amounts of the organic silicon compound (A) and metal compound (B) and the solvent (C) were as shown in Table 1.
- Table 1 shows the water contact angle, film thickness, abrasion resistance, and droplet slippage of the resulting coating film.
- the water / oil repellent coating composition of the present invention can provide a coating film having both water / oil repellency and wear resistance.
- the water / oil repellent coating composition of the present invention By using the water / oil repellent coating composition of the present invention, it is possible to provide a coating film having both water / oil repellency and wear resistance, and display devices such as touch panel displays, optical elements, semiconductor elements, and architectures. It is useful in the fields of materials, automobile parts, nanoimprint technology, solar cell members and the like.
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Abstract
Description
また、本発明の撥水撥油コーティング組成物は、さらに溶剤(C)を含むことが好ましい。前記溶剤(C)は、アルコール系溶剤を含むことが好ましい。
なお、炭化水素鎖部分の炭素数とは、酸素非置換型の炭化水素鎖含有基では炭化水素基(炭化水素鎖)を構成する炭素原子の数を意味し、酸素置換型の炭化水素鎖含有基では、酸素原子をメチレン基(-CH2-)と仮定して数えた炭素原子の数を意味するものとする。
炭化水素基の一部のメチレン基(-CH2-)が酸素原子に置き換わる場合、炭化水素基は、飽和脂肪族炭化水素基であることが好ましく、炭化水素基の一部のメチレン基(-CH2-)が酸素原子に置き換わった基としては、具体的には、(ポリ)エチレングリコール単位を有する基等を例示することができる。
また、1つの第1の炭化水素鎖含有基と、1つの第2の炭化水素鎖含有基と、2つの加水分解性基とを有する化合物としては、具体的には、炭素数6~20のアルキル基を有するアルキルメチルジメトキシシラン、炭素数6~20のアルキル基を有するアルキルメチルジエトキシシラン等のアルキルメチルジアルコキシシラン;炭素数6~20のアルキル基を有するアルキルメチルジヒドロキシシラン;炭素数6~20のアルキル基を有するアルキルメチルジアセトキシシラン;炭素数6~20のアルキル基を有するアルキルメチルジクロロシラン;炭素数6~20のアルキル基を有するアルキルメチルジイソシアネートシラン;等が挙げられる。
中でも、1つの第1の炭化水素鎖含有基と、3つの加水分解性基を有する化合物が好ましく、アルキルトリアルコキシシランがより好ましい。
金属化合物(B)において、加水分解性基の個数は1以上であることが好ましく、より好ましくは2以上、さらに好ましくは3以上であり、4以下であることが好ましい。
また、式(II)において、mは、MがAl、Fe、In等の3価金属の場合は2を表し、MがGe、Hf、Si、Ti、Sn、Zr等の4価金属の場合は3を表し、MがTa等の5価金属の場合は4を表す。
加水分解性基のみを有する化合物としては、テトラメトキシシラン、テトラエトキシシラン、テトラプロポキシシラン、テトラブトキシシラン等のテトラアルコキシシラン;トリエトキシアルミニウム、トリプロポキシアルミニウム、トリブトキシアルミニウム等のトリアルコキシアルミニウム;トリエトキシ鉄等のトリアルコキシ鉄;トリメトキシインジウム、トリエトキシインジウム、トリプロポキシインジウム、トリブトキシインジウム等のトリアルコキシインジウム;テトラメトキシゲルマニウム、テトラエトキシゲルマニウム、テトラプロポキシゲルマニウム、テトラブトキシゲルマニウム等のテトラアルコキシゲルマニウム;テトラメトキシハフニウム、テトラエトキシハフニウム、テトラプロポキシハフニウム、テトラブトキシハフニウム等のテトラアルコキシハフニウム;テトラメトキシチタン、テトラエトキシチタン、テトラプロポキシチタン、テトラブトキシチタン等のテトラアルコキシチタン;テトラメトキシスズ、テトラエトキシスズ、テトラプロポキシスズ、テトラブトキシスズ等のテトラアルコキシスズ;テトラメトキシジルコニウム、テトラエトキシジルコニウム、テトラプロポキシジルコニウム、テトラブトキシジルコニウム等のテトラアルコキシジルコニウム;ペンタメトキシタンタル、ペンタエトキシタンタル、ペンタプロポキシタンタル、ペンタブトキシタンタル等のペンタアルコキシタンタル;等が挙げられる。
第2の炭化水素鎖含有基と加水分解性基を有する化合物としては、メチルトリメトキシシラン、エチルトリメトキシシラン、メチルトリエトキシシラン、エチルトリエトキシシラン、メチルトリプロポキシシラン等のアルキルトリアルコキシシラン;ビニルトリメトキシシラン、ビニルトリエトキシシラン等のアルケニルトリアルコキシシラン;等が挙げられる。
前記アルコール系溶剤としては、メタノール、エタノール、プロパノール、ブタノール、エチレングリコール、プロピレングリコール、ジエチレングリコール等が挙げられ、前記エーテル系溶剤としては、ジメトキシエタン、テトラヒドロフラン、ジオキサン等が挙げられ、ケトン系溶剤としては、アセトン、メチルエチルケトン等が挙げられ、エステル系溶剤としては、酢酸エチル、酢酸ブチル等が挙げられ、アミド系溶剤としては、ジメチルホルムアミド等が挙げられる。
中でも、アルコール系溶剤、エーテル系溶剤が好ましく、アルコール系溶剤がより好ましい。
中でも、触媒としては、有機金属化合物が好ましく、有機アルミニウム化合物がより好ましく、有機アルミニウムエチルアセトアセテート化合物が特に好ましい。
このうち触媒が酸性化合物(特に好ましくは塩酸)である場合、酸性化合物は、有機ケイ素化合物(A)と金属化合物(B)の合計100質量部に対して、0.0001質量部以上であることが好ましく、より好ましくは0.0005質量部以上、さらに好ましくは0.001質量部以上であり、1質量部以下であることが好ましく、より好ましくは0.5質量部以下、さらに好ましくは0.3質量部以下である。
また、撥水撥油コーティング組成物と基材とを接触させた状態で、空気中で静置すると、空気中の水分が取り込まれ、加水分解性基の加水分解・重縮合が促進されるため、好ましい。得られたコーティング皮膜は、さらに、乾燥してもよい。加温乾燥させる温度としては、通常40~250℃であり、好ましくは60~200℃であり、さらに好ましくは60~150℃である。
また、ヒドロキシ基は他のヒドロキシ基、アルコキシ基等と縮合して、-O-基を形成するが、このようなヒドロキシ基が縮合した基が前記金属原子に結合していてもよい。
Rb2は、ヒドロキシ基であることが好ましい。
さらに、式(2)において、nは、MがAl、Fe、In等の3価金属の場合は1を表し、MがGe、Hf、Si、Ti、Sn、Zr等の4価金属の場合は2を表し、MがTa等の5価金属の場合は3を表す。
前記基材には予め易接着処理を施しておいてもよい。易接着処理としては、コロナ処理、プラズマ処理、紫外線処理等の親水化処理が挙げられる。また、樹脂、シランカップリング剤、テトラアルコキシシラン等によるプライマー処理を用いてもよい。プリマー処理によりプライマー層を撥水膜と基体の間に設けることで、耐湿性や耐アルカリ性等の耐久性をより向上できる。
プライマー層としては、例えば、下記式(III)で表される化合物および/またはその部分加水分解縮合物からなる(P1)成分を含む下地層形成用組成物を用いて形成された層が好ましい。
Si(XP2)4 …(III)
[ただし、式(III)中、XP2はそれぞれ独立して、ハロゲン原子、アルコキシ基またはイソシアネート基を示す。]
[ただし、式(IV)中、XP3はそれぞれ独立して加水分解性基または水酸基を示し、pは1~8の整数である。]
本発明の実施例で用いた測定法は下記の通りである。
撥水撥油コーティング組成物をコーティングし、コーティング皮膜を形成した基板を32°に傾け、その上に20μLの水を滴下し、その液滴の移動速度を測定した。具体的には、まず該コーティング皮膜上に液滴を滴下した(位置(1))。位置(1)から液滴が0.9cm滑落した場所(位置(2))を起点に、さらに3cm滑落した場所(位置(3))までの移動に要した時間(秒)を測定した。位置(2)から位置(3)までの移動距離3cmを、位置(2)から位置(3)の滑落に要した時間(秒)で除することにより液滴の移動速度を求めた。
スチールウール試験機(大栄精機社製)を使用した。消しゴム(トンボ鉛筆社製 モノワンダストキャッチ)をコーティング皮膜に500gの荷重で接触させ、40r/minの速度で摩耗試験をおこない、初期接触角から-15°以下となる摩耗回数を測定した。摩耗回数は、最大1500回までとし、1500回後も-15°以内であれば耐摩耗性あり(○)と評価する。
非接触表面形状計測機(菱化システム社製 VertScan)にてコーティング皮膜の厚みを測定した。
接触角計(協和界面科学社製 DM700)で、液滴法(液量:3.0μL)により、コーティング皮膜表面の水に対する接触角を測定した。
有機ケイ素化合物(A)としてのオクチルトリエトキシシラン2.8部(0.01モル部)、金属化合物(B)としてのオルトケイ酸テトラエチル(テトラエトキシシラン)41.7部(0.20モル部)に、溶剤(C)としてのエタノールを84部、触媒としての塩酸(0.01mol/L水溶液)60部を混合して、室温で24時間撹拌して撥水撥油コーティング組成物を得た。得られた撥水撥油コーティング組成物を、ガラス基板(Corning社製「EAGLE XG」)上に、MIKASA社製スピンコータにより、回転数3000rpm、20secの条件でスピンコートした後、乾燥させてコーティング被膜を得た。
有機ケイ素化合物(A)、金属化合物(B)の種類と使用量、及び、溶剤(C)を表1に示す通りとした以外は実施例1と同様にして、コーティング皮膜を得た。
得られたコーティング皮膜の水に対する接触角、膜厚、耐摩耗性、液滴の滑り性を表1に示す。
Claims (8)
- 少なくとも1つの第1の炭化水素鎖含有基と、少なくとも1つの加水分解性基とがケイ素原子に結合している有機ケイ素化合物(A)と、
少なくとも1つの加水分解性基が金属原子に結合しており、前記第1の炭化水素鎖含有基よりも長さが短い第2の炭化水素鎖含有基が前記金属原子に結合していてもよい金属化合物(B)とを含み、
前記金属化合物(B)と前記有機ケイ素化合物(A)のモル比(金属化合物(B)/有機ケイ素化合物(A))が18以上、48以下である撥水撥油コーティング組成物。 - 前記金属化合物(B)と前記有機ケイ素化合物(A)のモル比(金属化合物(B)/有機ケイ素化合物(A))が18以上、36以下である請求項1に記載の撥水撥油コーティング組成物。
- さらに溶剤(C)を含む請求項1または2に記載の撥水撥油コーティング組成物。
- 前記溶剤(C)が、アルコール系溶剤を含む請求項3に記載の撥水撥油コーティング組成物。
- 前記式(II)中、Rb1とAb1とが同一の基である請求項6に記載の撥水撥油コーティング組成物。
- 前記式(II)中、MがSiである請求項6または7に記載の撥水撥油コーティング組成物。
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US20170313902A1 (en) | 2017-11-02 |
US10370546B2 (en) | 2019-08-06 |
TW201623564A (zh) | 2016-07-01 |
CN107109119B (zh) | 2019-08-23 |
KR102500899B1 (ko) | 2023-02-16 |
TWI681047B (zh) | 2020-01-01 |
KR20170078718A (ko) | 2017-07-07 |
CN107109119A (zh) | 2017-08-29 |
JPWO2016068103A1 (ja) | 2017-08-10 |
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