WO2004044019A1 - Films de revetement hydrofuges et oleofuges - Google Patents
Films de revetement hydrofuges et oleofuges Download PDFInfo
- Publication number
- WO2004044019A1 WO2004044019A1 PCT/JP2003/014212 JP0314212W WO2004044019A1 WO 2004044019 A1 WO2004044019 A1 WO 2004044019A1 JP 0314212 W JP0314212 W JP 0314212W WO 2004044019 A1 WO2004044019 A1 WO 2004044019A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- group
- silicone
- coating film
- hydroxy
- film according
- Prior art date
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- 239000011248 coating agent Substances 0.000 title claims abstract description 156
- 238000000576 coating method Methods 0.000 title claims abstract description 156
- 239000005871 repellent Substances 0.000 title description 3
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- 239000000203 mixture Substances 0.000 claims abstract description 54
- 229920001577 copolymer Polymers 0.000 claims abstract description 43
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 32
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000011737 fluorine Substances 0.000 claims abstract description 17
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000010703 silicon Substances 0.000 claims abstract description 7
- 238000001723 curing Methods 0.000 claims description 80
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 65
- 239000000178 monomer Substances 0.000 claims description 59
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 49
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 47
- 239000003795 chemical substances by application Substances 0.000 claims description 47
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- -1 acryl Chemical group 0.000 claims description 34
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 33
- SNVLJLYUUXKWOJ-UHFFFAOYSA-N methylidenecarbene Chemical group C=[C] SNVLJLYUUXKWOJ-UHFFFAOYSA-N 0.000 claims description 30
- 238000006116 polymerization reaction Methods 0.000 claims description 29
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 claims description 28
- 125000003342 alkenyl group Chemical group 0.000 claims description 23
- 125000005020 hydroxyalkenyl group Chemical group 0.000 claims description 20
- 125000002768 hydroxyalkyl group Chemical group 0.000 claims description 20
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- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 claims description 3
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- 230000000052 comparative effect Effects 0.000 description 6
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 5
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- 125000004400 (C1-C12) alkyl group Chemical group 0.000 description 4
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 4
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 4
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- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- 229920000877 Melamine resin Polymers 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000001588 bifunctional effect Effects 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 235000019439 ethyl acetate Nutrition 0.000 description 3
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- OPQYOFWUFGEMRZ-UHFFFAOYSA-N tert-butyl 2,2-dimethylpropaneperoxoate Chemical compound CC(C)(C)OOC(=O)C(C)(C)C OPQYOFWUFGEMRZ-UHFFFAOYSA-N 0.000 description 3
- 239000012956 1-hydroxycyclohexylphenyl-ketone Substances 0.000 description 2
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 2
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- MQDJYUACMFCOFT-UHFFFAOYSA-N bis[2-(1-hydroxycyclohexyl)phenyl]methanone Chemical compound C=1C=CC=C(C(=O)C=2C(=CC=CC=2)C2(O)CCCCC2)C=1C1(O)CCCCC1 MQDJYUACMFCOFT-UHFFFAOYSA-N 0.000 description 2
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- ALVZNPYWJMLXKV-UHFFFAOYSA-N 1,9-Nonanediol Chemical compound OCCCCCCCCCO ALVZNPYWJMLXKV-UHFFFAOYSA-N 0.000 description 1
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- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 229910007161 Si(CH3)3 Inorganic materials 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 238000000026 X-ray photoelectron spectrum Methods 0.000 description 1
- XRMBQHTWUBGQDN-UHFFFAOYSA-N [2-[2,2-bis(prop-2-enoyloxymethyl)butoxymethyl]-2-(prop-2-enoyloxymethyl)butyl] prop-2-enoate Chemical compound C=CC(=O)OCC(COC(=O)C=C)(CC)COCC(CC)(COC(=O)C=C)COC(=O)C=C XRMBQHTWUBGQDN-UHFFFAOYSA-N 0.000 description 1
- VZTQQYMRXDUHDO-UHFFFAOYSA-N [2-hydroxy-3-[4-[2-[4-(2-hydroxy-3-prop-2-enoyloxypropoxy)phenyl]propan-2-yl]phenoxy]propyl] prop-2-enoate Chemical compound C=1C=C(OCC(O)COC(=O)C=C)C=CC=1C(C)(C)C1=CC=C(OCC(O)COC(=O)C=C)C=C1 VZTQQYMRXDUHDO-UHFFFAOYSA-N 0.000 description 1
- MUBKMWFYVHYZAI-UHFFFAOYSA-N [Al].[Cu].[Zn] Chemical compound [Al].[Cu].[Zn] MUBKMWFYVHYZAI-UHFFFAOYSA-N 0.000 description 1
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- SOGAXMICEFXMKE-UHFFFAOYSA-N alpha-Methyl-n-butyl acrylate Natural products CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 1
- 229920003180 amino resin Polymers 0.000 description 1
- 230000003667 anti-reflective effect Effects 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- 235000019400 benzoyl peroxide Nutrition 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000012975 dibutyltin dilaurate Substances 0.000 description 1
- XXJWXESWEXIICW-UHFFFAOYSA-N diethylene glycol monoethyl ether Chemical compound CCOCCOCCO XXJWXESWEXIICW-UHFFFAOYSA-N 0.000 description 1
- 125000005442 diisocyanate group Chemical group 0.000 description 1
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- WNMORWGTPVWAIB-UHFFFAOYSA-N ethenyl 2-methylpropanoate Chemical compound CC(C)C(=O)OC=C WNMORWGTPVWAIB-UHFFFAOYSA-N 0.000 description 1
- MEGHWIAOTJPCHQ-UHFFFAOYSA-N ethenyl butanoate Chemical compound CCCC(=O)OC=C MEGHWIAOTJPCHQ-UHFFFAOYSA-N 0.000 description 1
- UIWXSTHGICQLQT-UHFFFAOYSA-N ethenyl propanoate Chemical compound CCC(=O)OC=C UIWXSTHGICQLQT-UHFFFAOYSA-N 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 125000003709 fluoroalkyl group Chemical group 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 150000002734 metacrylic acid derivatives Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 125000002816 methylsulfanyl group Chemical group [H]C([H])([H])S[*] 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- QBDSZLJBMIMQRS-UHFFFAOYSA-N p-Cumylphenol Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=CC=C1 QBDSZLJBMIMQRS-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- WRAQQYDMVSCOTE-UHFFFAOYSA-N phenyl prop-2-enoate Chemical class C=CC(=O)OC1=CC=CC=C1 WRAQQYDMVSCOTE-UHFFFAOYSA-N 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 125000003107 substituted aryl group Chemical group 0.000 description 1
- UWHCKJMYHZGTIT-UHFFFAOYSA-N tetraethylene glycol Chemical compound OCCOCCOCCOCCO UWHCKJMYHZGTIT-UHFFFAOYSA-N 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 125000005389 trialkylsiloxy group Chemical group 0.000 description 1
- 239000013638 trimer Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Classifications
-
- 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
- C09D143/00—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 containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Coating compositions based on derivatives of such polymers
- C09D143/04—Homopolymers or copolymers of monomers containing silicon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F214/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen
- C08F214/18—Monomers containing fluorine
- C08F214/26—Tetrafluoroethene
- C08F214/265—Tetrafluoroethene with non-fluorinated comonomers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen
- C08L33/16—Homopolymers or copolymers of esters containing halogen atoms
Definitions
- the present invention relates to coating films , which have excellent properties such as stain resistance, water- and oil-repellency, chemical resistance and weather resistance. More particularly, it relates to coating films, which retain water- and oil-repellency for a long term. The present invention also relates to a method for producing these coating films .
- fluorine- containing copolymers obtained by copolymerization of hydrocarbon monomers such as hydroxyalkyl vinyl ethers with fluoroolefins are commonly used.
- hydrocarbon monomers constitute about 50% of the material for improved solubility of the material in an organic solvent.
- an increased content of hydrocarbon monomers causes a reduced content of fluorine in a fluorine-containing copolymer, resulting in a lack of desired coating film properties including water- and oil-repellency and stain resistance, which are required for fluorocarbon resins.
- water- and oil- repellency can be improved by addition of a small amount of an organosilicon compound such as silicone oil to a fluorine- containing copolymer.
- an organosilicon compound such as silicone oil
- silicone oil it is difficult to retain water- and oil-repellency for a long term.
- silicone oil cannot be used because it may leach from the surface of the coating.
- a fluorine-containing copolymer comprising a specific type of organosilicon compound or reactive silicone could provide a coating film having excellent water- and oil-repellency, chemical resistance and weather resistance (see, e.g. , JP KOKAI 2000-313725, JP KOKAI 2001-247622, JP KOKAI 2001-288216).
- JP KOKAI 2000-313725, JP KOKAI 2001-247622, JP KOKAI 2001-288216 it has not been clarified why these excellent properties are provided by a coating film formed from a fluorine-containing copolymer comprising such an organosilicon compound or reactive silicone.
- the inventors of the present invention have also found that when the amount of an organosilicon compound in a fluorine-containing copolymer falls within a specific range, such a copolymer can be used to form a coating film having still further improved water- and oil-repellency. However, it has also been remained unclear what characteristics of the resulting coating film are responsible for such an effect.
- JP KOKAI 09-239913 discloses a film obtained by reaction of an alkyd resin, an amino resin or a modified silicone resin, along with its atomic concentrations of the film surface as measured by means of X-ray photoelectron spectroscopy (hereinafter referred to as "XPS").
- XPS X-ray photoelectron spectroscopy
- the object of the present invention is to provide a coating film formed from a fluorine-containing copolymer and its composition as well as a method for producing the coating film, in order to overcome the above problems. More particularly, the object of the present invention is to provide a coating film formed from a fluorine-containing copolymer and its composition, wherein the coating film has excellent stain resistance, water-repellency, oil-repellency, stain removability, chemical resistance and weather resistance, and exhibits only a small decrease in stain removability even after repeat of applying and removing stain. The object of the present invention is also to provide a method for producing the coating film above.
- a coating film exhibits markedly excellent properties when the coating film satisfies certain conditions in atomic concentrations of Si and F present at its surface. They have also found that such a coating film can be formed from a composition comprising a silicone- containing fluorocopolymer, and that such a coating film allows Si atoms to be localized at its surface.
- NA(Si( ⁇ )) and NA(F( ⁇ )) denote the atomic concentrations (atomic %) of silicon and fluorine, respectively, as measured by X-ray photoelectron spectroscopy at a take-off angle ⁇ ] .
- the coating film of the present invention has a contact angle with water in a range from 98° to 110°. Its peel strength ranges from 10 g/50 mm to 1200 g/50 mm. Its film thickness ranges from 0.0001 mm to 0.5 mm.
- the coating film of the present invention is provided on a substrate selected from the group consisting of acryl, wood, plastic, metal, graphite, paper, concrete, non-combustible material and glass. Such a substrate may be discharged or electrostatically charged.
- the coating film of the present invention is formed from a composition comprising a silicone-containing fluorocopolymer (A) (hereinafter referred to as "fluorocopolymer composition" ) .
- a fluorocopolymer composition may further comprise an acrylic resin (B), a curing agent (C), a polymerization initiator (D), a solvent (E) or a combination thereof.
- the silicone-containing fluorocopolymer (A) comprises the following components as polymerization units :
- a silicone selected from the group consisting of a silicone of Formula (1): R 1 -Si(CH 3 ) 2 -0-[Si(CH 3 ) 2 -0] n -Si(CH 3 ) 2 -R 2 (1)
- r x represents an integer of 1 to 6;
- r 2 represents an integer of 1 to 6; and
- n represents an integer of 20 to 150)
- a silicone of Formula ( 2 ) :
- R 4 represents a hydrogen atom or a methyl group
- R 5 , R 6 and R 7 which may be the same or different, each represent a hydrogen atom, a methyl group, an ethyl group, a n-propyl group, an isopropyl group, a n-butyl group, a t-butyl group, a sec-butyl group, a phenyl group, a substituted phenyl group, -CF 3 , -C 2 H 4 CF 3 , -C(CH 3 ) 3 or -OSi(CH 3 ) 3 ); and a combination thereof, wherein the amounts of the fluoroolefin (a) and the silicone (b) are from 15% to 85% by mole and 0.001% to 6.0% by mole, respectively, based on the sum of polymerization units.
- the silicone-containing fluorocopolymer (A) may further comprise, as an additional polymerization unit, (c) an unsaturated monomer selected from the group consisting of a hydroxy-containing unsaturated monomer, a hydroxy-free unsaturated monomer and a combination thereof, wherein the amount of the unsaturated monomer (c) is from 1% to 70% by mole, based on the sum of polymerization units .
- an unsaturated monomer selected from the group consisting of: a monomer of Formula ( 9 ) :
- CHR 31 CR 32 -R 33 (9) (wherein R 31 , R 32 and R 33 , which may be the same or different, each represent a hydrogen atom, a hydroxy group, a -Cg alkyl group, a alkenyl group, a C..-C 6 hydroxyalkyl group, a C 2 -C 6 hydroxyalkenyl group, a Ci-Cg alkoxyl group, a Ci-Cg hydroxyalkyloxy group, a phenyl group or a substituted phenyl group, provided that at least one of R 31 , R 32 and R 33 is a hydroxy group or a hydroxy-containing group); a monomer of Formula (10):
- CHR 34 CR 35 -X-OR 36 (10) (wherein R 34 and R 35 , which may be the same or different, each represent a hydrogen atom, a hydroxy group, a C.--C 6 alkyl group, a C--C 6 alkenyl group, a C ⁇ C j hydroxyalkyl group, a C 2 -C 6 hydroxyalkenyl group, a alkoxyl group, a phenyl group or a substituted phenyl group; R 36 represents a hydrogen atom, a Ci-Cg alkyl group, a C- L -Cg alkenyl group, a hydroxyalkyl group, a C 2 -C 6 hydroxyalkenyl group, a phenyl group or a substituted phenyl group; and X represents a methylene group or a carbonyl group, provided that at least one of R 34 , R 35 and R 36 0 is a hydroxy group or a hydroxy-containing group
- the amount of the hydroxy- containing unsaturated monomer is from 1% to 50% by mole, based on the sum of polymerization units.
- the silicone-containing fluorocopolymer (A) may be a copolymer formed by reaction between an unsaturated isocyanate and a silicone-containing fluorocopolymer comprising such a hydroxy-containing unsaturated monomer as a polymerization unit.
- CH 2 C(R 26 )COOC 3 H 6 -Si[OSi(CH 3 ) 3 ] 3 (8) (wherein R 26 represents a hydrogen atom or a methyl group) ; and a combination thereof.
- atomic concentrations at a surface of a coating film are determined by X-ray photoelectron spectroscopy (XPS) . Measurement conditions for XPS are as described in Example 1 below.
- XPS X-ray photoelectron spectroscopy
- the detection depth from the sample surface can be changed by varying the take-off angle ⁇ (i.e., the angle between the sample surface and the analyzer axis).
- ⁇ the take-off angle between the sample surface and the analyzer axis.
- L the effective escape depth of photoelectrons (the actual distance required for photoelectrons to pass through a sample before reaching an analyzer) depends on ⁇ and hence differs from the escape depth (L 0 ) (the minimum distance between the sample surface and the position where photoelectrons are released) , as explained below.
- L is represented by the following equation:
- L L 0 /sin ⁇ and L increases with decrease in ⁇ .
- a higher value of L increases the probability that photoelectrons lose their energy due to interaction with the sample, thus increasing the percentage of released photoelectrons that do not contribute to peaks in the XPS spectrum.
- a higher value of L reduces the actually detectable depth of the sample and hence provides information concerning a portion of the sample closer to the surface .
- the atomic concentration of element X measured by XPS at a take-off angle ⁇ is expressed as NA(X( ⁇ )) (atomic %).
- Elements Si, F, C and 0 are used for calculation of atomic concentrations , and the sum of these elements is set to 100%. Namely, when the amount of element X measured by XPS at a take-off angle ⁇ is expressed as A(X( ⁇ )), NA(X( ⁇ )) is represented as follows:
- NA(X( ⁇ )) A(X( ⁇ ))/(A(Si( ⁇ ))+A(F( ⁇ ))+A(C( ⁇ ))+A(O( ⁇ ))) x 100.
- the atomic concentration of Si [NA(Si( 90°) ) (atomic %)] present at its surface is at least 2.1 atomic % and at most 50 atomic %, preferably at most 30 atomic %, more preferably at most 25.8 atomic % .
- the atomic concentration of F [NA(F(90°) ) (atomic %) ] present at its surface is at least 1.0 atomic %, preferably at least 2.0 atomic %, and at most 50.0 atomic %, preferably at most 32.7 atomic %.
- NA(F(90°)) below the above range results in insufficient water-repellency, oil-repellency and stain removability.
- NA(F(90°)) beyond the above range results in reduced oil- repellency and stain removability.
- the coating film of the present invention desirably satisfies the following conditions (i) and (ii) as to NA(Si(90°) ) and NA(F(90°)) :
- NA(Si(90°))/NA(F(90°)) is at least 0.063 and at most 20.0, preferably at most 12.0, more preferably at most 11.4.
- the resulting coating film may have insufficient water-repellency, oil-repellency and stain removability.
- the coating film of the present invention further satisfies the following conditions (v) and (vi) as to the concentrations of Si and F at its surface, as measured by XPS:
- the results of XPS analysis provide information concerning a portion of the sample closer to the surface at a lower take-off angle ⁇ , whereas XPS results reflect information concerning a portion deeper from the sample surface when measured at a higher take-off angle ⁇ .
- the condition (v) indicates that Si is localized near the surface
- condition (vi) indicates that the concentration of F increases with receding from the surface.
- the coating film of the present invention is characterized by the in-depth distributions of Si and F. Without being bound by any theory, it is believed that such in-depth distributions of Si and F contribute to excellent properties (e.g., water-repellency, oil-repellency, stain resistance) found for the coating film of the present invention.
- the coating film of the present invention has a contact angle with water of 90° to 120°, preferably 98° to 120°, and more preferably 98° to 110°; it has excellent water-repellency.
- the coating film of the present invention has a peel strength of at least 10 g/50 mm, preferably at least 25 g/50 mm, more preferably at least 27 g/50mm, and at most 1200 g/50 mm, preferably at most 1000 g/50 mm, more preferably at most 300 g/50 mm, still more preferably at most 200 g/50 mm. Namely, the coating film of the present invention has excellent stain removability.
- the coating film of the present invention has an average film thickness of at least 0.00005 mm, preferably at least 0.0001 mm, more preferably at least 0.0002 mm, and at most 2 mm, preferably at most 0.5 mm, more preferably at most 0.3 mm. If the coating film is too thin, some areas cannot be coated completely. Likewise, a too thick film is less economic because there is no great difference in its properties .
- Any substrate, whether organic or inorganic, may be used for the coating film of the present invention. Examples of a substrate material available for use include wood, plastic (e.g. , acryl, PET) , FRP, metals (e.g.
- Preferred transparent materials are acryl, PET and glass.
- Such a substrate may take any form, with either flat or rough surface.
- Articles having the coating film of the present invention may be used for a wide variety of interior and/or outdoor uses.
- a substrate Prior to formation of the coating film, a substrate may be discharged or electrostatically charged.
- electrostatically charging treatment include positively charging treatment
- examples of discharging treatment include corona discharge treatment.
- the in-depth distributions of elements (especially Si and F) in the coating film are influenced by corona discharge treatment or positively charging treatment performed on the substrate prior to coating film formation. More specifically. Si is localized at the surface and the concentration of F increases with receding from the surface. It is therefore preferable to perform the above treatment on a substrate before forming the coating film of the present invention.
- a substrate may be subject to any other treatment, as long as it ensures that Si is localized at the surface and the concentration of F increases with receding from the surface.
- a substrate Before forming the coating film of the present invention, a substrate may be coated with an additional coating film.
- the coating film of the present invention serves as a topcoat. Even when serving as a topcoat, the coating film of the present invention also exhibits excellent properties as mentioned above.
- the above-mentioned corona discharge treatment or positively charging treatment may be performed on the pre-coated substrate, followed by formation of the coating film of the present invention.
- the coating film of the present invention is formed from a composition comprising a silicone-containing fluorocopolymer (A) (hereinafter referred to as "fluorocopolymer composition" ) .
- the fluorocopolymer composition may further comprise an acrylic resin (B) , a curing agent (C) , a polymerization initiator (D) , a solvent (E) or a combination thereof.
- the fluorocopolymer composition is applied onto a substrate and then cured to form the coating film of the present invention. Curing may be accomplished in any known manner, including cold curing, heat curing, photocuring (e.g., ultraviolet curing) and electron radiation curing.
- the silicone-containing fluorocopolymer (A) comprises (a) a fluoroolefin and (b) a silicone as polymerization units.
- the silicone-containing fluorocopolymer (A) may further comprise (c) an unsaturated monomer as an additional polymerization unit.
- a mixture of several fluoroolefins may be used for this purpose.
- the amount of the fluoroolefin (a) is at least 10% by mole, preferably at least 12% by mole, more preferably at least 15% by mole, still more preferably at least 25 % by mole, and at most 90% by mole, preferably at most 85% by mole, more preferably at most 80% by mole, based on the sum of polymerization units in the silicone-containing fluorocopolymer (A) .
- the silicone (b) include those having the following Formulae (1) to (3) and combinations thereof:
- R 4 represents a hydrogen atom or a C 1 -C 4 alkyl group, preferably represents a hydrogen atom or a methyl group
- R 5 , R 6 and R 7 which may be the same or different, each represent a Ci-Cg alkyl group, a alkenyl group, an aryl group, a substituted aryl group, a heterocyclic group, a fluoroalkyl group or a trialkylsiloxy group, preferably represent a hydrogen atom, a methyl group, an ethyl group, a n-propyl group, an isopropyl group, a n-butyl group, a t-butyl group, a sec-butyl group, a phenyl group, a substituted phenyl group, -CF 3 , -C 2 H 4 CF 3 ,
- silicone (b) examples include polydimethylsiloxane, one or both ends of which are methacryl-modified, acryl-modified or vinyl-modified.
- a "reactive silicone” refers to a silicone having an unsaturated bond(s) on one or both ends, including the methacryl-modified, the acryl-modified or the vinyl- modified polydimethylsiloxane as described above.
- the amount of the silicone (b) is at least 0.001% by mole, preferably at least 0.01% by mole, more preferably at least 0.02% by mole, even more preferably at least 0.03% by mole, and at most 20% by mole, preferably at most 10% by mole, more preferably at most 6.0% by mole , still more preferably at most 2.0% by mole , even more preferably at most 1.0% by mole, based on the sum of polymerization units in the silicone-containing fluorocopolymer.
- the amount of the silicone (b) falls within the above range, the resulting coating film satisfies the above-mentioned conditions as to NA(Si( ⁇ ) ) and NA(F( ⁇ ) ) and easily attain excellent coating film properties .
- the unsaturated monomer (c) contained in the silicone-containing fluorocopolymer (A) may be an unsaturated monomer containing a hydroxy group(s) (hereinafter referred to as "hydroxy-containing unsaturated monomer”), an unsaturated monomer free from hydroxy groups (hereinafter referred to as "hydroxy-free unsaturated monomer”) or a combination thereof.
- the unsaturated monomer serves to increase the solubility in a solvent.
- a hydroxy-containing unsaturated monomer is involved in cross-linking reactions during the curing step of coating films and serves to accelerate the curing process. Examples of a hydroxy-containing unsaturated monomer include those having any of the following formulae:
- CHR 31 CR 32 -R 33 (9) (wherein R 31 , R 32 and R 33 , which may be the same or different, each represent a hydrogen atom, a hydroxy group, a alkyl group, a alkenyl group, a C- L -Cg hydroxyalkyl group, a C 2 -C 6 hydroxyalkenyl group, a alkoxyl group, a hydroxyalkyloxy group, a phenyl group or a substituted phenyl group, provided that at least one of R 31 , R 32 and R 33 is a hydroxy group or a hydroxy-containing group); and
- CHR 34 CR 35 -X-OR 3 ⁇ (10) (wherein R 34 and R 35 , which may be the same or different, each represent a hydrogen atom, a hydroxy group, a alkyl group, a Ci-Cg alkenyl group, a C 1 -C 6 hydroxyalkyl group, a C 2 -C 6 hydroxyalkenyl group, a Ci-C 6 alkoxyl group, a C ⁇ -C 6 hydroxyalkyloxy group, a phenyl group or a substituted phenyl group; R 36 represents a hydrogen atom, a Ci-C 6 alkyl group, a C ⁇ -C 6 alkenyl group, a Ci-Cg hydroxyalkyl group, a C 2 -C 6 hydroxyalkenyl group, a phenyl group or a substituted phenyl group; and X represents a methylene group or a ⁇ arbonyl group, provided that at least one of R 34
- CHR 37 CR 38 -OR 39 (11) (wherein R 37 and R 38 , which may be the same or different, each represent a hydrogen atom, a hydroxy group, a Ci-Cg alkyl group, a Ci-Cg alkenyl group, a Ci-C 6 hydroxyalkyl group, a C 2 -C 6 hydroxyalkenyl group, a Ci-C 6 alkoxyl group, a phenyl group or a substituted phenyl group; R 39 represents a hydrogen atom, a Ci-Cg alkyl group, a Ci-C 6 alkenyl group, a Ci-C 6 hydroxyalkyl group, a C 2 -C 6 hydroxyalkenyl group, a phenyl group or a substituted phenyl group; and X represents a methylene group or a carbonyl group, provided that at least one of R 37 , R 38 and R 39 0 is a hydroxy group or a hydroxy-containing group);
- a C ⁇ -C 6 hydroxyalkyl group in Formulae (9) , (10) and (11) preferably has a hydroxy group at its end, as represented by -(CH 2 ) x -OH (wherein x represents an integer of 2 to 6).
- hydroxy-containing unsaturated monomer examples include hydroxybutyl vinyl, hydroxybutyl vinyl ether (e.g., 4-hydroxybutyl vinyl ether), hydroxypropyl vinyl, hydroxypropyl vinyl ether (e.g. , 3-hydroxypropyl vinyl ether) , hydroxyethyl vinyl ether (e.g., 2-hydroxyethyl vinyl ether), 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 2-hydroxybutyl methacrylate, 2-hydroxyethyl acrylate, 2- hydroxypropyl acrylate and 2-hydroxybutyl acrylate.
- 4-hydroxybutyl vinyl ether preferred is preferred.
- Examples of a hydroxy-free unsaturated monomer include olefins such as ethylene and propylene, as well as esters between saturated carboxylic acids and vinyl alcohols, such as vinyl acetate, vinyl n-butyrate, vinyl isobutyrate and vinyl propionate. Examples further include monomers represented by Formula (9), (10) or (11), provided that they are free from hydroxy groups.
- the hydroxy-containing unsaturated monomer may have a structure where a hydrogen atom(s) of the corresponding hydroxy-free unsaturated monomer is replaced with a hydroxy group(s).
- hydroxybutyl vinyl ether may be used as a hydroxy- containing unsaturated monomer
- butyl vinyl ether may be used as a hydroxy-free unsaturated monomer.
- the amount of the unsaturated monomer (c) is at least 1% by mole, preferably at least 5% by mole, more preferably at least 10% by mole, and at most 70% by mole, preferably at most 50% by mole, more preferably at most 40% by mole, even more preferably at most 30% by mole, based on the sum of polymerization units in the silicone-containing fluorocopolymer (A) . If the amount of the unsaturated monomer (c) exceeds the above range, it is difficult to achieve properties including water-repellency and oil-repellency. If the amount of the unsaturated monomer (c) is below the above range, the silicone-containing fluorocopolymer (A) may have reduced solubility in a solvent .
- the amount of a hydroxy-containing unsaturated monomer is at least 1% by mole, preferably at least 5% by mole, more preferably at least 10% by mole, and at most 50% by mole, preferably at most 30% by mole, more preferably at most 25% by mole, based on the sum of polymerization units in the silicone-containing fluorocopolymer (A) . If the amount of a hydroxy-containing unsaturatedmonomer exceeds the above range, it is difficult to achieve properties including water- repellency and oil-repellency. If the amount of a hydroxy- containing unsaturated monomer is below the above range, it may be difficult to provide cured coating films .
- the silicone-containing fluorocopolymer (A) preferably has an unsaturated bond(s) such as a double bond. This is because such unsaturated bonds are involved in polymerization and/or cross-linking between molecules of the silicone- containing fluorocopolymer (A) as well as between the silicone-containing fluorocopolymer (A) and other components during the curing step, and hence they serve to accelerate the curing process. As a result, the amount of the curing agent (C) can be reduced.
- Such unsaturated bonds may be those remaining unreacted after polymerization of the silicone-containing fluorocopolymer (A) or may be introduced after the polymerization.
- silicone-containing fluorocopolymer (A) comprises a hydroxy-containing unsaturated monomer
- its hydroxy group(s) may be reacted with a compound having an unsaturated bond(s) to introduce an unsaturated bond(s) into the silicone-containing fluorocopolymer (A)
- a compound to be reacted with a hydroxy group may be an unsaturated isocyanate having an unsaturated bond(s) and an isocyanate group(s).
- Examples of such an unsaturated isocyanate include 2-isocyanato ethyl methacrylate, 2-isocyanato ethyl acrylate, 4-isocyanato butyl methacrylate, 4-isocyanato butyl acrylate, a reaction product between an unsaturated monoalcohol (1 mole) and a diisocyanate compound (1 mole) , and a reaction product between an unsaturated monoalcohol (2 moles) and a triisocyanate compound (1 mole) .
- Examples of such an unsaturated monoalcohol include hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxybutyl acrylate, hydroxyethyl methacrylate, hydroxybutyl methacrylate, hydroxybutyl acrylate and allyl alcohol .
- the fluorocopolymer composition comprising the silicone-containing fluorocopolymer (A) may further comprise an acrylic resin (B) , a curing agent (C), a polymerization initiator (D), a solvent (E) or a combination thereof.
- the amount of the silicone-containing fluorocopolymer (A) is at least 5% by weight, preferably at least 20% by weight, more preferably at least 30% by weight , still more preferably at least 40% by weight, and at most 95% by weight, preferably at most 80% by weight, more preferably at most 70% by weight, still more preferably at most 60% by weight, based on the sum of the silicone-containing fluorocopolymer (A) , the acrylic resin (B) and the curing agent (C) .
- the amount of the silicone-containing fluorocopolymer (A) is at least 5% by weight, preferably at least 10% by weight, more preferably at least 25% by weight, still more preferably at least 40% by weight, and at most 95% by weight, preferably at most 85% by weight, more preferably at most 75% by weight, still more preferably at most 60% by weight, based on the sum of the silicone-containing fluorocopolymer (A) , the curing agent (C) and the polymerization initiator (D) .
- An acrylic resin (B) refers to a polymer or copolymer of acrylic acid, metha ⁇ rylic acid or derivatives thereof, including thermosetting acrylic resins and photocurable acrylic resins.
- Thermosetting acrylic resins are preferred in the case of using heat curing in the curing step, while photocurable acrylic resins are preferred in the case of using photocuring such as ultraviolet curing. These acrylic resins may be used either alone or in combination.
- an acrylic resin (B) examples include those commonly called acrylic resins , such as methyl (meth)acrylate copolymers, ethyl (meth)acrylate copolymers, butyl (meth)acrylate copolymers, styrene-containing (meth)acrylate copolymers and hydroxyethyl (meth)acrylate copolymers.
- TM (meth)acrylate is intended to mean both acrylate and methacrylate.
- acrylic resins examples include Acrydic A-814, Acrydic A-810-45 (Dainippon Ink & Chemicals, Inc., Japan), Tesloid 4211-46, Tesloid 4212-46
- photocurable acrylic resins include photocurable (meth) acrylate resins, such as commonly known aliphatic/aromatic urethane (meth)acrylates, epoxy (meth)acrylates , polyester (meth)acrylates and polyether (meth)acrylates .
- Illustrative examples include aromatic and aliphatic urethane acrylates such as Ebecryl 210, Ebecryl 8402 and Ebecryl 1290K (Daicel-UCB Co., Ltd.); epoxy acrylates such as KAYARAD EAM-2300, KAYARAD R-190 (Nippon Kayaku Co., Ltd., Japan) and Ebecryl 600 (Daicel-UCB Co. , Ltd. ) ; and polyester acrylates such as Ebecryl 80, Ebecryl 800, Ebecryl 810 (Daicel-UCB Co., Ltd.) and Aronix M-7100 (Toagosei Co., Ltd., Japan).
- These photo- ⁇ rosslinkable (meth)acrylate resins may be used either alone or in combination.
- the amount of the acrylic resin (B) is at least 5% by weight, preferably at least 20% by weight, more preferably at least 40% by weight , and at most 95% by weight , preferably at most 85% by weight, more preferably at most 60% by weight, based on the sum of the silicone-containing fluorocopolymer (A) , the acrylic resin (B) and the curing agent (C).
- the use of the acrylic resin (B) may improve properties of coating films, such as lifetime and hardness.
- Any substance may be used as a curing agent (C) , as long as it can accelerate curing of the fluorocopolymer composition.
- examples include substances which are polymerizable and/or cross-linkable with the silicone-containing fluorocopolymer (A) .
- the curing agent (C) preferably comprises polyvalent isocyanates.
- a "polyvalent isocyanate” refers to a compound having two or more isocyanate groups.
- polyvalent isocyanates include non-yellowing diisocyanates or adducts thereof (e.g., hexamethylene diisocyanate, isophorone diisocyanate) ; triisocyanates such as lysine triisocyanate (e.g., 2- isocyanatoethyl-2 , 6-diisocyanatohexanoate) ; and polyvalent isocyanates having isocyanurates .
- triisocyanates e.g., lysine isocyanate
- polyvalent isocyanates having isocyanurates e.g., lysine isocyanate
- a curing agent for heat curing of the fluorocopolymer composition examples include a melamine curing agent, a urea resin curing agent and a polybasic acid curing agent.
- a melamine curing agent examples include butylated melamine, methylated melamine and epoxy-modified melamine; the degree of modification may be selected as appropriate for the intended use, and the degree of self-condensation may also be appropriately selected.
- Examples of a urea resin curing agent include methylated urea resins and butylated urea resins .
- Examples of a polybasic acid curing agent include long chain aliphatic dicarboxylic acids, aromatic polyvalent carboxylic acids and acid anhydrides thereof .
- a reactive diluent may also be used as a curing agent (C) .
- a "reactive diluent” refers to a compound which not only serves as a solvent , but also is involved in cross-linking reactions during the curing step and hence incorporated into the resulting coating film.
- a reactive diluent may be used instead of or in addition to a solvent .
- such an embodiment is advantageous in reducing the amount of an organic solvent released into the atmosphere.
- a reactive diluent allows reduction in the viscosity of the fluorocopolymer composition, resulting in an improvement in workability. Due to these properties, a reactive diluent can be used in all curing techniques .
- a reactive diluent may be monofunctional, bifunctional or multifunctional.
- a reactive diluent preferably has an unsaturated double bond(s) in its molecule.
- a monofunctional acrylate or methacrylate a bifunctional acrylate or methacrylate
- (meth)acrylate a trifunctional (meth)acrylate, or a tetra- or higher functional (meth)acrylate may be used.
- Illustrative examples of a reactive diluent include one or more members selected from the group consisting of acrylate compounds, methacrylate compounds and ethers as listed below.
- Examples of a monofunctional acrylate include isobutyl (meth)acrylate, t-butyl (meth)acrylate, lauryl (meth)acrylate, cetyl (meth)acrylate, cyclohexyl (meth)acrylate, isobonyl (meth)acrylate, benzyl (meth)acrylate, 2-methoxyethyl (meth)acrylate, 3-methoxybutyl (meth)acrylate, ethylcarbitol (meth)acrylate, 2- ethylhexylcarbitol (meth)acrylate, phenoxyethyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, phenoxypolyethylene glycol (meth)acrylate, meth
- (meth)acrylate 2-acryloyloxyethyl-2-hydroxypropylphthalate, 2-hydroxy-3-phenoxypropyl (meth)acrylate, 2-acryloyloxyethyl hydrogen phthalate, 2-acryloyloxypropyl hydrogen phthalate, dimethylaminoethyl (meth)acrylate, ⁇ -carboxyethyl (meth)acrylate, isobonyl (meth) acrylate, oxyethylated phenol acrylate, phenol EO-modified (meth)acrylate, paracumylphenol EO-modified (meth)acrylate and nonylphenol EO-modified (meth)acrylate.
- examples of a bifunctional acrylate include 1, 6-hexanediol di(meth)acrylate, 1,4-butanediol di(meth)acrylate, 1, 9-nonanediol di(meth)acrylate, neopentyl glycol di(meth)acrylate, dipropylene glycol di(meth)acrylate, tripropylene glycol di(meth)acrylate, tetraethylene glycol di(meth) crylate, polyethylene glycol di(meth)acrylate, bisphenol A EO-modified di(meth)acrylate and isocyanuri ⁇ acid EO-modified di(meth) acrylate.
- trifunctional (meth)acrylate monomers include pentaerythritol tria ⁇ rylate, trimethylolpropane tri(meth)acrylate, trimethylolpropane ethoxytriacrylate, trimethylolpropane EO-modified triacrylate, trimethylolpropane PO-modified triacrylate and isocyanuric acid EO-modified triacrylate.
- Illustrative examples of a tetra- or higher functional (meth)acrylate include ditrimethylolpropane tetraacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate and dipentaerythritol hexaa ⁇ rylate .
- the amount of the curing agent (C) is at least 0.1% by weight, preferably at least 5% by weight, and at most 40% by weight, preferably at most 30% by weight, based on the sum of the silicone-containing fluorocopolymer (A) , the acrylic resin (B) and the curing agent (C) . If the amount of the curing agent is below the above range, the curing agent fails to provide sufficient acceleration of the curing process. If the amount of the curing agent exceeds the above range, it is difficult to achieve sufficient water-repellency and oil-repellency.
- the fluorocopolymer composition comprises a curing agent (C) including a reactive diluent, and a polymerization initiator (D)
- the amount of the silicone- containing fluorocopolymer (A) is at least 5% by weight, preferably at least 10% by weight, more preferably at least 25% by weight, still more preferably at least 40% by weight, and at most 95% by weight, preferably at most 85% by weight, more preferably at most 75% by weight, still more preferably at most 60% by weight, based on the sum of the silicone-containing fluorocopolymer (A) , the curing agent (C) including the reactive diluent, and the polymerization initiator (D) .
- the total amount of the photocurable acrylic resin and the curing agent is at least 1% by weight, preferably at least 5% by weight, more preferably at least 10 wt% by weight, still more preferably at least 20 wt% by weight, and at most 90% by weight, preferably at most 85% by weight, more preferably at most 65% by weight, still more preferably at most 50% by weight, based on the sum of the silicone-containing fluorocopolymer (A) , the acrylic resin (B) and the curing agent (C) .
- the fluorocopolymer composition may comprise a polymerization initiator (D) .
- a polymerization initiator encompasses a photopolymerization initiator and a thermal polymerization initiator, which may be selected as appropriate for curing techniques .
- thermal polymerization initiator examples include benzoyl peroxide, azobisisobutyronitrile, t-butylperoxy-2-ethylhexanoate and t-butylperoxyisopropyl monocarbonate .
- Examples of a photopolymerization initiator available for use in ultraviolet curing include benzoin ether, benzophenone, 1-hydroxy-cyclohexyl-phenyl-ketone, 2-methyl- 1- [ 4- (methylthio)phenyl] -2-morpholinopropan-l-one, 2- benzyl-2-dimethylamino-l- (4-morpholinophenyl) -butanone- l,2,2-dimethoxy-l,2-diphenylethan-l-one and 1-hydroxy- cyclohexyl-phenyl-ketone.
- Mixing between at least one silicone-containing fluorocopolymer and at least one member selected from the group consisting of the acrylic resin (B), the curing agent (C) and the polymerization initiator (D) may be accomplished in various devices used for standard coating preparation, such as a ball mill, a paint shaker, a sand mill, a triple roll mill and a kneader.
- other substances such as pigments, dispersion stabilizers, viscosity adjusters and leveling agents may further be mixed and incorporated into the coating composition, if necessary.
- the fluorocopolymer composition may comprise a solvent (E).
- a solvent include aromatic hydrocarbons (e.g., xylene, toluene), acetic esters (e.g., ethyl acetate, butyl acetate), ketones (e.g., methyl ethyl ketone, methyl isobutyl ketone), glycol ethers (e.g., ethyl cellosolve) , alcohols (e.g., butanol) and commercially available thinners .
- aromatic hydrocarbons e.g., xylene, toluene
- acetic esters e.g., ethyl acetate, butyl acetate
- ketones e.g., methyl ethyl ketone, methyl isobutyl ketone
- glycol ethers e.g., ethyl cellosolve
- alcohols e
- Particularly preferred examples include butyl acetate, ethyl acetate, toluene, xylene, an aromatic hydrocarbon mixture, methyl ethyl ketone, methyl isobutyl ketone, methanol, butanol, isopropyl alcohol, ethanol and Solvesso®. These solvents may be used either alone or in combination.
- the fluorocopolymer composition comprises a curing agent (C) including a reactive diluent and a solvent (E)
- the amount of the silicone-containing fluorocopolymer (A) is at least 5% by weight, preferably at least 20% by weight, more preferably at least 30% by weight, still more preferably at least 40% by weight, and at most 95% by weight, preferably at most 85% by weight, more preferably at most 75% by weight, still more preferably at most 60% by weight, based on the sum of the silicone-containing fluorocopolymer (A) , the curing agent (C) including the reactive diluent, and the solvent (E).
- the coating film of the present invention is formed by applying the above fluorocopolymer composition onto a substrate and then curing the composition.
- the curing step may be accomplished by means of any known curing technique, including cold curing, heat curing, ultraviolet curing and electron radiation curing.
- the fluorocopolymer composition preferably comprises a polyvalent isocyanate as a curing agent (C), as stated above.
- Conditions for heat curing may be selected as appropriate for the silicone-containing fluorocopolymer (A) and the curing agent (C) .
- the heating temperature is preferably set in a range from 40°C to 80°C, and the heating time is preferably set in a range from 1 to 24 hours.
- the heating temperature is preferably set in a range from 140°C to 230°C, while the heating time is preferably set in a range from 1 to 20 minutes.
- Ultraviolet curing may be accomplished in a known manner. For example, it can be accomplished using a high-pressure mercury lamp under conditions of 100 to 1000 mJ/cm 2 .
- the fluorocopolymer composition preferably comprises a photopolymerization initiator.
- Electron radiation curing may be accomplished in a known manner. Electron radiation curing is advantageous in curing the fluorocopolymer composition in the absence of a polymerization initiator. Curing conditions are set to, e.g. , 30 kGy at 110 kV or 30 kGy at 200 kV.
- the XPS apparatus used was a SHIMADZU/KRATOS AXIS-HS (Kratos Analytical Inc., UK).
- X-ray source for analysis monochromatic AlK ⁇ ray (60 W) Analysis area: 2 x 4 mm
- the concentrations of Si, F, C and 0 at a take-off angle ⁇ were determined by means of the above apparatus system as follows. First, the number of element X [A(X( ⁇ ))] present at the surface of the coating film was determined for Si, F, C and O on the basis of the results of multiscanning. Next, the atomic concentration of element X (atomic %) was determined by the following equation:
- NA(X( ⁇ )) A(X( ⁇ ))/(A(Si( ⁇ ))+A(F( ⁇ ))+A(C( ⁇ ))+A(O( ⁇ )))X100 (wherein X is Si, F, C or O) .
- NA(N( ⁇ ) ) A(N( ⁇ ))/(A(Si( ⁇ ))+A(F( ⁇ ))+A(C( ⁇ ))+A(O( ⁇ )))X100 (wherein A(N( ⁇ )) denotes the number of N atoms present at the surface of the coating film, which is determined from the results of multiscanning) .
- A(N( ⁇ )) denotes the number of N atoms present at the surface of the coating film, which is determined from the results of multiscanning
- the surface of the coating film was filled with oil inks (black and red Magic Inks®) , and its initial oil ink repellency was evaluated.
- This coating film was further allowed to stand at room temperature for 1 hour and then rubbed with a dry cloth to remove the ink. After this procedure was repeated for 20 times, the oil ink repellency of the surface of the coating film was evaluated on a scale of 1 to 5 :
- a contact angle meter CA-DT (Kyowa Interface Science Co. , Ltd., Japan) was used for measurement. [Peel strength]
- a #31B adhesive tape (50 mm in width, Nitto Denko Co., Ltd. , Japan) was applied to the surface of the coating film using a 2 kg roller and then kept under a load of 20 g/cm 2 at 70°C for 20 hours. The coating film was then allowed to stand at 23°C for 30 minutes, and was tested for its peel strength at a peel angle of 180° and at a peel rate of 300 mm/minute.
- Example 1 The same procedure as shown in Example 1 was repeated to give copolymers , except that the amount of the reactive silicone I used in Example 1 was changed to 0.1% by mole, 0.2% by mole and 0.4% by mole. These copolymers were used to form coating films , and the properties of the coating film were then tested in the same manner as shown in Example 1. The results obtained are shown in Tables 1 to 3 above. It should be noted that the amount of butyl vinyl ether was reduced to balance the increase in the amount of silicone I .
- Table 4 shows the data of the coating films prepared in Examples 1 to 4 and Comparative Example 1 (shown below), including the average Si concentration of each coating film determined from the weight of components (excluding a solvent) in each fluorocopolymer composition, the measured Si concentration at the surface of each coating film (measured by XPS), and the measured F concentration at the surface of each coating film (measured by XPS) .
- the measured Si concentration at the surface is higher than the average Si concentration in a bulk, indicating that Si moieties are localized near the surface.
- Table 5 indicates that Si atoms are localized at the surface of the coating film of the present invention, whereas the concentration of F atoms increases with receding from the surface .
- the resulting copolymer was used to form a coating film, and the properties of the coating film were tested in the same manner as shown in Example 1. The results obtained are shown in Tables 1 and 2 above.
- Example 9 The same procedure as shown in Example 5 was repeated to give copolymers , except that the amount of the reactive silicone II used in Example 5 was changed to 0.001% by mole, 0.002% by mole and 0.01% by mole. These copolymers were used to form coating films, which were then analyzed for their properties in the same manner as shown in Example 5. The results obtained are shown in Tables 1 and 2 above. [Example 9]
- the resulting copolymer was used to form a coating film, and the properties of the coating film were tested in the same manner as shown in Example 3. The results obtained are shown in Tables 1 and 2 above.
- Reactive silicone III Reactive silicone III:
- Example 11 The silicone-containing fluorocopolymer prepared in Example 1 was mixed with Dianal LR-199 (Mitsubishi Rayon Co., Ltd. , Japan) at a ratio of 5/5 in terms of solid content to prepare a silicone-containing fluorocopolymer composition, and the properties of the coating film were tested. The results obtained are shown in Tables 1 and 2 above. [Example 11]
- a 50% butyl acetate solution of the above copolymer was applied onto a corona-discharged PET film using a #10 bar coater, dried at 80°C for 1 minute, and then irradiated under 200 ppm oxygen using an electron beam irradiator EC250/15/180L (Iwasaki Electric Co. , Ltd. , Japan) with an acceleration voltage of 200 kV and a dose of 30 kGy.
- an electron beam irradiator EC250/15/180L Iwasaki Electric Co. , Ltd. , Japan
- Example 12 The above 50% butyl acetate solution of the silicone-containing fluorocopolymer having an unsaturated double bond(s) prepared in Example 11 (100 g) was mixed with Ebecryl 80 (30 g, polyester acrylate, Daicel-UCB Co., Ltd.), 1,6-hexanediol diacrylate (20 g) and 2-methyl-1- [4- (methyl- thio)phenyl] -2-morpholinopropanon-l-one (5 g, Ciba-Geigy) to prepare a silicone-containing fluorocopolymer composition. This composition was used to form a cured coating film under the following conditions , and the properties of the resulting coating film were tested in the same manner as shown in Example 1. The results obtained are shown in Tables 1 and 2 above. [Conditions for cured coating film formation]
- Reactive silicone V: CH 2 C(CH 3 )COOC 3 Hg-Si(CH 3 ) 2 -O-[Si(CH 3 ) 2 -O] ⁇ 50 -Si(CH 3 ) 2 -C 4 H 9 [Example 16]
- the results obtained are shown in Tables 1 and 2 above.
- Example 8 The same procedure as shown in Example 8 was repeated to analyze coating film properties , except that the reactive silicone II was replaced with the reactive silicone IV. The results obtained are shown in Tables 1 and 2 above.
- Example 2 The same procedure as shown in Example 1 was repeated to give a copolymer, except that the reactive silicone I was excluded from the composition charged in Example 1.
- the molar ratio of vinylidene fluoride/ tetrafluoroethylene/hydroxybutyl vinyl ether/butyl vinyl ether/a reactive silicone I was 30.009/40.012/15.0045/14.9745.
- the resulting copolymer was used to form a coating film in the same manner as shown in Example 1, and the properties of the resulting coating film were tested. The results obtained are shown in Tables 1 to 3 above.
- Example 11 The same procedure as shown in Example 11 was repeated to give a copolymer, except that the reactive silicone I was excluded from the composition charged in Example 11.
- the resulting copolymer was used to form a coating film in the same manner as shown in Example 11, and the properties of the resulting coating film were tested. The results obtained are shown in Tables 1 and 2 above.
- Example 5 The same procedure as shown in Example 5 was repeated to give a copolymer, except that the amount of the reactive silicone II was changed to 0.0008% by mole.
- the resulting copolymer was used to form a coating film in the same manner as shown in Example 5 , and the resulting coating film was analyzed for its properties. The results obtained are shown in Tables 1 and 2 above .
- the coating film of Comparative Example 3 was also analyzed by XPS at various take-off angles. The results obtained are shown in Table 6 below. In Table 6, the concentrations of Si and F were determined by the following equations :
- Si concentration A(Si( ⁇ ))/(A(Si( ⁇ ))+A(F( ⁇ ))+A(C( ⁇ ))+A(O( ⁇ ))+A(N( ⁇ ))) x 100
- F concentration A(F( ⁇ ))/(A(Si( ⁇ ))+A(F( ⁇ ))+A(C( ⁇ ))+A(O( ⁇ ))+A(N( ⁇ )) x 100 (wherein NA(X( ⁇ )) denotes the amount of element X, as measured by XPS at a take-off angle ⁇ ) .
- the present invention relates to coating films having excellent stain resistance, water- and oil-repellency, chemical resistance and weather resistance.
- the coating films of the present invention are characterized by the in-depth distributions of Si and F, in which Si-containing moieties are localized at the surface, i.e., the concentration of Si- containing moieties in a silicone-containing fluorocopolymer increases with approaching to the surface of the coating films .
- coating films having excellent properties can be obtained by using only a small amount of a reactive silicone.
- the silicone- containing fluorocopolymer of the present invention also results in Si-containing moieties that are highly localized near the surface. This means that coating films having excellent properties can be obtained when the copolymer is incorporated even in a small amount.
- cured coating films prepared from the silicone-containing fluorocopolymer and its composition according to the present invention are preferred for interior use (e.g., wall, floor, furniture) where stain resistance is required; for mold release films; for optical materials (e.g. , antireflective films of display devices and the like); for outdoor use (e.g., outer wall, film) where weather resistance is required; and for graffiti-proof applications. They are also useful for interior and exterior use for large buildings, train carriages, ships, and so on.
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Abstract
La présente invention concerne un film de revêtement possédant une excellente résistance aux taches, des propriétés hydrofuges et oléofuges, une bonne résistance aux produits chimiques et aux intempéries ainsi qu'un procédé pour fabriquer ce film de revêtement. Le film de revêtement répond aux exigences suivantes (i) et (ii) en termes de concentrations atomiques de silicium et de fluor présents à sa surface: 2,1 = NA(Si(90°)) = 25,8; (i) 2,0 = NA(F(90°)) = 32,7 (ii). Le film de revêtement est aussi caractérisé par les distributions en profondeur de Si et de F; Si est situé près de la surface, et la concentration de F augmente à mesure qu'on s'éloigne de la surface. Le film de revêtement peut être formé à partir d'une composition comprenant un copolymère de fluor contenant du silicium.
Applications Claiming Priority (2)
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US10344188B2 (en) | 2015-12-22 | 2019-07-09 | 3M Innovative Properties Company | Acrylic polyvinyl acetal films comprising an adhesive layer |
CN110494459A (zh) * | 2017-04-17 | 2019-11-22 | 关东电化工业株式会社 | 含氟共聚物 |
US10493738B2 (en) | 2015-12-22 | 2019-12-03 | 3M Innovative Properties Company | Acrylic polyvinyl acetal graphic films |
CN110951381A (zh) * | 2019-12-10 | 2020-04-03 | 荆门科顺新材料有限公司 | 一种高耐候外露型单组份聚氨酯防水涂料及其制备方法 |
US10619019B2 (en) | 2014-12-08 | 2020-04-14 | 3M Innovative Properties Company | Acrylic polyvinyl acetal films, composition, and heat bondable articles |
US11034830B2 (en) | 2015-12-22 | 2021-06-15 | 3M Innovative Properties Company | Acrylic polyvinyl acetal films comprising a second layer |
US11167523B2 (en) | 2015-12-22 | 2021-11-09 | 3M Innovative Properties Company | Acrylic films comprising a structured layer |
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JP5336824B2 (ja) * | 2008-11-25 | 2013-11-06 | パナソニック株式会社 | 撥水・撥油性皮膜形成用樹脂組成物、及び塗装品 |
JP6105366B2 (ja) * | 2013-04-24 | 2017-03-29 | 信越ポリマー株式会社 | 離型用フィルム |
JP6105376B2 (ja) * | 2013-04-26 | 2017-03-29 | 信越ポリマー株式会社 | 離型用フィルム |
JP6697771B1 (ja) * | 2019-07-11 | 2020-05-27 | Dicグラフィックス株式会社 | 塗装建材の製造方法、及び得られた塗装建材 |
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US10619019B2 (en) | 2014-12-08 | 2020-04-14 | 3M Innovative Properties Company | Acrylic polyvinyl acetal films, composition, and heat bondable articles |
US10344188B2 (en) | 2015-12-22 | 2019-07-09 | 3M Innovative Properties Company | Acrylic polyvinyl acetal films comprising an adhesive layer |
US10493738B2 (en) | 2015-12-22 | 2019-12-03 | 3M Innovative Properties Company | Acrylic polyvinyl acetal graphic films |
US11034830B2 (en) | 2015-12-22 | 2021-06-15 | 3M Innovative Properties Company | Acrylic polyvinyl acetal films comprising a second layer |
US11167523B2 (en) | 2015-12-22 | 2021-11-09 | 3M Innovative Properties Company | Acrylic films comprising a structured layer |
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CN110494459B (zh) * | 2017-04-17 | 2022-01-28 | 关东电化工业株式会社 | 含氟共聚物 |
CN110951381A (zh) * | 2019-12-10 | 2020-04-03 | 荆门科顺新材料有限公司 | 一种高耐候外露型单组份聚氨酯防水涂料及其制备方法 |
CN110951381B (zh) * | 2019-12-10 | 2021-10-08 | 荆门科顺新材料有限公司 | 一种高耐候外露型单组份聚氨酯防水涂料及其制备方法 |
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