WO2022054727A1 - ポリオレフィン系塗料組成物 - Google Patents
ポリオレフィン系塗料組成物 Download PDFInfo
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- WO2022054727A1 WO2022054727A1 PCT/JP2021/032542 JP2021032542W WO2022054727A1 WO 2022054727 A1 WO2022054727 A1 WO 2022054727A1 JP 2021032542 W JP2021032542 W JP 2021032542W WO 2022054727 A1 WO2022054727 A1 WO 2022054727A1
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- Prior art keywords
- meth
- acrylate
- mass
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- coating composition
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- 229920000098 polyolefin Polymers 0.000 title claims abstract description 69
- 239000008199 coating composition Substances 0.000 title claims abstract description 51
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims abstract description 71
- 239000002904 solvent Substances 0.000 claims abstract description 39
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 31
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 31
- 239000002253 acid Substances 0.000 claims abstract description 24
- 239000000178 monomer Substances 0.000 claims abstract description 19
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims abstract description 12
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 12
- 230000009477 glass transition Effects 0.000 claims abstract description 8
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims abstract description 5
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 claims abstract description 4
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims abstract description 4
- -1 2-ethylhexyl Chemical group 0.000 claims description 25
- 239000011347 resin Substances 0.000 claims description 19
- 229920005989 resin Polymers 0.000 claims description 19
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 claims description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 10
- 239000004215 Carbon black (E152) Substances 0.000 claims description 9
- 229930195733 hydrocarbon Natural products 0.000 claims description 9
- 150000002430 hydrocarbons Chemical class 0.000 claims description 9
- 150000002576 ketones Chemical class 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 7
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- 239000011248 coating agent Substances 0.000 abstract description 37
- 238000000576 coating method Methods 0.000 abstract description 37
- 239000000126 substance Substances 0.000 abstract description 20
- 238000003860 storage Methods 0.000 abstract description 16
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- 239000000049 pigment Substances 0.000 description 16
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- 238000006243 chemical reaction Methods 0.000 description 8
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 7
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- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
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- 150000008065 acid anhydrides Chemical class 0.000 description 5
- 239000000460 chlorine Substances 0.000 description 5
- 229910052801 chlorine Inorganic materials 0.000 description 5
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 description 5
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- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 3
- 229910001887 tin oxide Inorganic materials 0.000 description 3
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 description 2
- AFFLGGQVNFXPEV-UHFFFAOYSA-N 1-decene Chemical compound CCCCCCCCC=C AFFLGGQVNFXPEV-UHFFFAOYSA-N 0.000 description 2
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- 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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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
- C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
- C09D123/26—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers modified by chemical after-treatment
-
- 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
- C08F220/00—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 a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1806—C6-(meth)acrylate, e.g. (cyclo)hexyl (meth)acrylate or phenyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—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 a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1808—C8-(meth)acrylate, e.g. isooctyl (meth)acrylate or 2-ethylhexyl (meth)acrylate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/26—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers modified by chemical after-treatment
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- 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
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
-
- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
-
- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/062—Copolymers with monomers not covered by C09D133/06
- C09D133/066—Copolymers with monomers not covered by C09D133/06 containing -OH groups
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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
- C09D151/00—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
- C09D151/06—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
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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
- C09D5/002—Priming paints
-
- 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
Definitions
- the present invention relates to a coating composition having good paint storage stability, adhesion to a polyolefin substrate, chemical resistance, and weather resistance.
- Polyolefin-based resins are relatively inexpensive and have various excellent properties such as chemical resistance and water resistance. Therefore, it is used in a wide range of fields as a material for automobile parts, electrical parts, building materials, food packaging films, and the like. Among them, in the automobile field, weight reduction is being promoted from the viewpoint of improving fuel efficiency, and the amount of polyolefin resin used tends to increase. Since the polyolefin member is a non-polar substrate and has low adhesion, a primer using a modified polyolefin having excellent adhesion is particularly used for automobile exterior parts. In recent years, the durability required for chemical resistance has become longer than before, and the demand for high-pressure cleaning resistance has increased so that the coating film does not peel off even at higher temperatures and pressures than before. Various proposals have been made to meet.
- Patent Document 1 a coating composition to which a modified polyolefin grafted with an acrylic resin is added is disclosed.
- the polyolefin graft-modified with an acrylic resin has sufficient coating film performance due to deterioration of coating film performance such as chemical resistance.
- An object of the present invention is a paint that is used as a primer for a polypropylene base material used for automobile exterior parts and the like, has superior chemical resistance and high-pressure car wash resistance, and has good paint storage stability.
- the purpose is to provide the composition.
- the present invention has the following configuration.
- the modified polyolefin (A) having a glass transition temperature of ⁇ 30 ° C. or higher, a glass transition temperature of 0 ° C. or higher, a hydroxyl value of 5 to 100 mgKOH / g, or an acid value of 0 to 30 mgKOH / g (meth).
- Acrylic resin (B) is included, and the (meth) acrylic acid ester monomer constituting the (meth) acrylic resin is changed to methyl (meth) acrylate, ethyl (meth) acrylate, cyclohexyl (meth) acrylate, and 2-ethyl.
- a coating composition comprising either a xyl (meth) acrylate or a (meth) acrylate containing an OH group.
- the coating composition according to the above [1] or [2], wherein the acid value of the modified polyolefin (A) is 5 to 40 mgKOH / g-resin.
- the present invention it is possible to form a coating film having excellent adhesion such as chemical resistance and high pressure wash resistance, and a coating composition having good storage stability can be obtained.
- the modified polyolefin (A) used in the present invention is not particularly limited, but is preferably an acid-modified polyolefin (A1) or an acid-modified chlorinated polyolefin (A2). It is also possible to use these in combination.
- the acid-modified polyolefin (A1) is preferably acid-modified to at least one of an ⁇ -olefin polymer or a copolymer, and is at least one of polyethylene, polypropylene and a propylene- ⁇ -olefin copolymer. It is more preferable to obtain one by grafting at least one of ⁇ , ⁇ -unsaturated carboxylic acid and its acid anhydride.
- ⁇ -olefin examples include those having 2 or more carbon atoms, and specifically, for example, ethylene, propylene, 1-butene, 2-methyl-1-propene, 2-methyl-1-butene, 3-methyl-.
- the propylene- ⁇ -olefin copolymer is obtained by copolymerizing propylene as a main component with ⁇ -olefin.
- ⁇ -olefin for example, one or several kinds of ethylene, 1-butene, 1-heptene, 1-octene, 4-methyl-1-pentene, vinyl acetate and the like can be used, and among them, ethylene and 1-. Butene is preferred.
- the ratio of the propylene component to the ⁇ -olefin component of the propylene- ⁇ -olefin copolymer is not limited, but the propylene component is preferably 50 mol% or more, and more preferably 70 mol% or more.
- the coating composition of the present invention has good adhesion, chemical resistance and storage stability of the coating material. Further, even if the ethylene component content is 30 mol% or less, the coating composition of the present invention sufficiently exhibits adhesion, chemical resistance and storage stability of the paint (paint stability), and the ethylene component content is 9 It does not matter if it is less than mol%.
- an acid functional group is polymerized.
- the acid functional group at least one of ⁇ , ⁇ -unsaturated carboxylic acid and its derivative can be used, and as the derivative of ⁇ , ⁇ -unsaturated carboxylic acid, acid anhydride is preferable.
- examples of at least one of ⁇ , ⁇ -unsaturated carboxylic acid and its acid anhydride include maleic acid, itaconic acid, citraconic acid and their acid anhydrides. Among these, acid anhydride is preferable, and maleic anhydride is more preferable.
- Specific examples thereof include acid-modified polypropylene, acid-modified propylene-ethylene copolymer, acid-modified propylene-butene copolymer, acid-modified propylene-ethylene-butene copolymer and the like, and one kind of these acid-modified polyolefins or Two or more types can be used in combination.
- the weight average molecular weight (Mw) of the acid-modified polyolefin (A1) is preferably in the range of 20,000 to 180,000. More preferably, it is in the range of 40,000 to 150,000. More preferably, it is in the range of 60,000 to 120,000. If it is 20,000 or more, the chemical resistance is good. On the other hand, when it is 180,000 or less, the paint storage stability is good.
- the acid value of the acid-modified polyolefin (A1) is preferably in the range of 5 to 40 mgKOH / g-resin from the viewpoint of adhesiveness to the polyolefin resin base material. More preferably, it is in the range of 10 to 30 mgKOH / g-resin. When it is 5 mgKOH / g-resin or more, the storage stability of the paint is good. On the other hand, when it is 40 mgKOH / g-resin or less, the chemical resistance is excellent.
- the melting point (Tm) of the acid-modified polyolefin (A1) is preferably 40 ° C. or higher, more preferably 50 ° C. or higher, still more preferably 60 ° C. or higher.
- Tm melting point
- the temperature is 40 ° C. or higher, the adhesion and chemical resistance are improved. Further, it is preferably 120 ° C. or lower, more preferably 100 ° C. or lower, still more preferably 90 ° C. or lower. When the temperature is 120 ° C. or lower, the storage stability of the paint is good.
- the method for producing the acid-modified polyolefin (A1) is not particularly limited, and for example, a radical graft reaction (a radical species is generated for a polymer as a main chain, and the radical species is used as a polymerization initiation point to form an unsaturated carboxylic acid and an acid. (Reaction of graft-polymerizing an anhydride), and the like.
- a radical graft reaction a radical species is generated for a polymer as a main chain, and the radical species is used as a polymerization initiation point to form an unsaturated carboxylic acid and an acid. (Reaction of graft-polymerizing an anhydride), and the like.
- the radical generator is not particularly limited, but is not particularly limited, but is di-tert-butylperoxyphthalate, tert-butylhydroperoxide, dicumyl peroxide, benzoyl peroxide, tert-butylperoxybenzoate, tert-butylperoxy-2- Organic peroxides such as ethyl hexanoate, tert-butyl peroxypivalate, methyl ethyl ketone peroxide, di-tert-butyl peroxide, lauroyl peroxide, azobisisobutyronitrile, azobisisopropionitrile and the like. Kind and the like. Above all, it is preferable to use an organic peroxide.
- the acid-modified chlorinated polyolefin (A2) is not limited, but the one obtained by chlorinating the acid-modified polyolefin (A1) is preferable.
- the chlorine content of the acid-modified chlorinated polyolefin (A2) is preferably 5 to 40% by mass, more preferably 10 to 30% by mass, and further preferably 15 to 25% by mass. If it is less than 5% by mass, the solution stability is low, and if it is 40% by mass or more, the adhesion may be lowered.
- the method for producing the acid-modified chlorinated polyolefin (A2) is not particularly limited, and can be obtained, for example, by dissolving the acid-modified polyolefin (A1) in a halogenated hydrocarbon such as chloroform and introducing chlorine.
- the glass transition temperature (hereinafter, Tg) of the acid-modified polyolefin (A1) and the acid-modified chlorinated polyolefin (A2), which are the modified polyolefin (A), is ⁇ 30 ° C. or higher, preferably ⁇ 25 ° C. or higher, and more. It is preferably ⁇ 20 ° C. or higher.
- Tg is -30 ° C or higher, the coating film is not easily affected when the coating film is heated in a water resistance test or a high-pressure detergency test, and deterioration of the coating film physical properties can be suppressed. Good high-pressure cleaning performance.
- the Tg of the (meth) acrylic resin (B) is 0 ° C. or higher, preferably 10 ° C. or higher, and more preferably 20 ° C. or higher. Further, it is preferably 150 ° C. or lower, and more preferably 100 ° C. or lower. In the film forming process, it is preferable that the Tg is low, but if it is too low, the physical properties may deteriorate when the coating film is heated. On the other hand, when the temperature is 150 ° C. or higher, the film forming property and the cross-linking reaction are difficult to occur, and the physical properties of the coating film may deteriorate.
- the Tg of the (meth) acrylic resin (B) can be obtained by calculating using the calculation formula (FOX formula) of the theoretical Tg of the (meth) acrylic acid ester copolymer.
- 1 / Tg C1 / Tg1 + C2 / Tg2 + ... + Cn / Tgn: (FOX formula)
- Tg is the theoretical Tg of the (meth) acrylic acid ester copolymer
- Cn is the monomer n in the monomer mixture of the (meth) acrylic acid ester copolymer (B).
- the weight ratio contained, Tgn is Tg of the homopolymer of the monomer n, n is the number of monomers constituting the (meth) acrylic acid ester copolymer (B), and is a positive integer.
- Tgn is Tg of the homopolymer of the monomer n
- n is the number of monomers constituting the (meth) acrylic acid ester copolymer (B), and is a
- Tg of the homopolymer of the (meth) acrylic acid ester monomer and the polar group-containing monomer the values described in the literature can be used.
- the following documents can be referred to: Kyoeisha Chemical Co., Ltd.'s (meth) acrylic acid ester catalog, Mitsubishi Chemical Corporation's acrylic ester catalog; and Kyozo Kitaoka, "New Polymer Bunko 7, Synthetic for Paints". "Introduction to Resins", Polymer Publishing Association, 1997, pp. 168-169.
- the weight average molecular weight (Mw) of the (meth) acrylic resin (B) is preferably 1000 or more, more preferably 5000 or more, still more preferably 10,000 or more. Further, it is preferably 100,000 or less, and more preferably 50,000 or less. When the weight average molecular weight is 1000 or more, the adhesion of the paint is good. On the other hand, when it is 100,000 or less, the storage stability of the paint tends to be good.
- the (meth) acrylic resin (B) has a hydroxyl value of 5 to 100 mgKOH / g or an acid value of 0 to 30 mgKOH / g.
- the hydroxyl value is preferably 10 to 90 mgKOH / g, more preferably 20 to 80 mgKOH / g. If it is less than 5 mgKOH / g, the cross-linking reaction is insufficient and the adhesion may be deteriorated. On the other hand, if it exceeds 100 mgKOH / g, the cross-linking reaction may proceed and the storage stability of the paint may decrease.
- the acid value of the (meth) acrylic resin (B) is preferably 2 to 20 mgKOH / g, more preferably 3 to 15 mgKOH / g. If the acid value exceeds 30 mgKOH / g, the paint stability may decrease.
- the hydroxyl value of the (meth) acrylic resin (B) showed a value in terms of solid content, and was evaluated according to the pyridine-acetyl chloride method of JIS K 0070-1992.
- the acid value of the (meth) acrylic resin (B) was a value in terms of solid content, and was evaluated according to the potentiometric titration method of JIS K 0070-1992.
- (meth) acrylate means “acrylate or methacrylate”
- (meth) acrylic acid means “acrylic acid or methacrylic acid”.
- the (meth) acrylic acid ester monomer constituting the (meth) acrylic resin (B) used in the present invention can be changed to methyl (meth) acrylate, ethyl (meth) acrylate, cyclohexyl (meth) acrylate, or 2-ethyl. It contains either a xyl (meth) acrylate or a (meth) acrylate containing an OH group. By containing these monomers, it is possible to form a coating film having excellent chemical resistance and the like while maintaining good paint stability even when mixed with a modified polyolefin.
- (meth) acrylic acid ester monomer containing an OH group examples include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, and 4-hydroxybutyl ( Meta) acrylate, 1,4-cyclohexanedimethanol mono acrylate, polyethylene glycol mono (meth) acrylate, polypropylene glycol mono (meth) acrylate, polybutylene glycol mono (meth) acrylate and polyethylene glycol-polypropylene glycol mono (meth) acrylate, Examples thereof include 2-hydroxy-3-phenoxypropyl (meth) acrylate, which can be used alone or in combination of two or more.
- (meth) acrylic acid ester monomer constituting the (meth) acrylic resin (B) n-propyl (meth) acrylate, iso-propyl (meth) acrylate, n-butyl (meth) acrylate, and iso-butyl ( Meta) acrylate, tert-butyl (meth) acrylate, tert-butylcyclohexyl (meth) acrylate, isobornyl (meth) acrylate, dicyclopentanyl (meth) acrylate, dodecyl (meth) acrylate ⁇ lauryl (meth) acrylate ⁇ , tridecyl (Meta) acrylate, tetradecyl (meth) acrylate, pentadecyl (meth) acrylate, hexadecyl (meth) acrylate, heptadecyl (meth) acrylate, stearyl (meth)
- the (meth) acrylic resin (B) of the present invention preferably does not contain a polycyclic (meth) acrylate from the viewpoint of improving adhesion to different materials other than polyolefins and resins used for top coating.
- a polycyclic (meth) acrylate examples include tetracyclododecyl (meth) acrylate, 2,10-dimethyltetracyclododecyl (meth) acrylate, and 11,12 dimethyltetracyclododecyl (meth) acrylate.
- the (meth) acrylic resin (B) of the present invention may contain a chain transfer agent.
- the chain transfer agent is not particularly limited, but is n-dodecyl mercaptan (lauryl mercaptan), 2-ethylhexyl thioglycolate, 2,4-diphenyl-4-methyl-1-pentene, 2-mercaptoethanol, etc.
- Examples thereof include mercaptans such as 2,3-dimethylcapto-1-propanol and glycidyl mercaptan, and allyl compounds such as allyl acetate, ⁇ -methylstyrene dimer and allyl carbinol.
- the (meth) acrylic resin (B) of the present invention may contain a polymerizable monomer other than the above.
- a polymerizable monomer other than the above.
- styrene-based monomers such as styrene, ⁇ -methylstyrene, paramethylstyrene, and divinylbenzene can be mentioned.
- examples of the monomers that can be used in combination other than the above include vinyl acetate and the like. These monomers may be used alone or in admixture of two or more.
- the content of the (meth) acrylic resin (B) is preferably 25 parts by mass or more with respect to 100 parts by mass of the acid-modified polyolefin (A). It is more preferably 50 parts by mass or more, and further preferably 100 parts by mass or more. When it is 25 parts by mass or more, the paint storage stability is good. Further, it is preferably 900 parts by mass or less, more preferably 450 parts by mass or less, and further preferably 300 parts by mass or less. When the content is 900 parts by mass or less, the adhesiveness and chemical resistance are satisfactorily exhibited.
- the coating composition proposed in the present invention may contain an acrylic resin, an alkyd resin, a urethane resin, or the like as long as the effects of the present invention are not impaired.
- the coating composition proposed in the present invention does not contain cellulose acetate butyrate (hereinafter referred to as CAB) or CAB-modified polyolefin obtained by grafting CAB to a modified polyolefin. Not contained is 20 parts by mass or less, more preferably 10 parts by mass or less, still more preferably 3 parts by mass or less, and particularly preferably 1 part by mass with respect to the modified polyolefin (A) in the coating composition. Hereinafter, it is most preferably 0 part by mass. Since these CABs do not have good compatibility with modified PO, the paint stability may decrease.
- the coating composition of the present invention may contain a pigment.
- a pigment a coloring pigment, an extender pigment, a conductive pigment and the like can be used.
- Color pigments include, for example, titanium oxide, carbon black, chrome yellow, ocher, Hansa yellow, pigment yellow, chrome orange, permanent orange, permanent red, fast violet, methyl violet lake, navy blue, cobalt blue, phthalocyanine blue, pigment green, etc.
- Examples thereof include naphthol green and aluminum paste, and these can be used alone or in combination of two or more.
- extender pigment examples include barium sulfate, talc, silica, calcium carbonate and the like, and one or more of these can be used in combination.
- the conductive pigment is not particularly limited as long as it can impart conductivity to the coating film, and may be in the form of particles, flakes, or fibers (including whiskers). be able to.
- examples thereof include titanium, antimony oxide, zinc antimonate, indium tin oxide and the like, and these may be used alone or in combination of two or more.
- the total amount of the pigment is preferably 50 to 700 parts by mass, more preferably 75 to 350 parts by mass with respect to 100 parts by mass of the acid-modified polyolefin (A).
- the coating composition contains a hydrocarbon solvent (C) and can further contain at least one of an ester solvent (D1) and a ketone solvent (D2).
- the hydrocarbon solvent (C) is preferably contained in an amount of 200 parts by mass or more, more preferably 300 parts by mass or more, and further preferably 400 parts by mass or more with respect to 100 parts by mass of the acid-modified polyolefin (A). Further, it is preferably 3000 parts by mass or less, and more preferably 2500 parts by mass or less. More preferably, it is 1800 parts by mass or less. By keeping it within the above range, excellent paint storage stability can be exhibited.
- hydrocarbon solvent (C) examples include toluene, xylene, aromatic hydrocarbon solvents such as Solvesso® 100, aliphatic hydrocarbon solvents such as hexane and heptane, cyclohexane, cyclohexene, methylcyclohexane and ethyl. Examples thereof include alicyclic hydrocarbon solvents such as cyclohexane, and one or more of these can be preferably used. Of these, xylene or cyclohexane is preferable. In particular, a combination of xylene, Solvesso® 100 and cyclohexane is preferred.
- the total amount of the ester solvent (D1) and the ketone solvent (D2) is preferably 20 parts by mass or more, more preferably 50 parts by mass or more, based on 100 parts by mass of the acid-modified polyolefin (A). preferable. Further, it is preferably 500 parts by mass or less, more preferably 400 parts by mass or less, and further preferably 200 parts by mass or less. By keeping it within the above range, excellent paint storage stability can be exhibited.
- ester solvent (D1) examples include methyl acetate, ethyl acetate, propyl acetate, isopropyl acetate, butyl acetate, isobutyl acetate, amyl acetate and the like. Of these, ethyl acetate is preferable.
- ketone solvent (D2) examples include acetone, methyl ethyl ketone, methyl isobutyl ketone and methyl amyl ketone, and among them, methyl ethyl ketone is preferable. It is also possible to combine two or more of the ester solvent (D1) and the ketone solvent (D2).
- an alcohol solvent (E) to the paint composition.
- the paint storage stability can be further improved.
- the amount is preferably 5 parts by mass or more, more preferably 10 parts by mass or more, based on 100 parts by mass of the acid-modified polyolefin (A). Further, it is preferably 70 parts by mass or less, more preferably 50 parts by mass or less. Within the above range, extremely excellent paint storage stability can be exhibited.
- the alcohol solvent (E) include methanol, ethanol, normal propyl alcohol, isopropyl alcohol, normal butanol, isobutanol, 2-butanol and the like.
- the coating composition of the present invention is composed of an acid-modified polyolefin (A) and a (meth) acrylic resin (B), and can be diluted as necessary to provide the coating composition of the present invention.
- the coating composition of the present invention is preferably a solvent-based coating composition. That is, when the total solvent contained in the coating composition is 100% by mass, the total of the hydrocarbon solvent (C), the ester solvent (D1), the ketone solvent (D2) and the alcohol solvent (E) is It is preferably 90% by mass or more, more preferably 95% by mass or more, further preferably 99% by mass or more, and may be 100% by mass or more. Since it is substantially a solvent-based coating composition, excellent water resistance and chemical resistance can be exhibited.
- the viscosity of the coating composition at the time of coating is not particularly limited, but the coating workability is good when the viscosity is within the range of 10 to 300 mPa ⁇ sec, more preferably 15 to 200 mPa ⁇ sec. , Suitable in terms of finished appearance.
- the coating composition of the present invention may contain a curing agent as long as the effects of the present invention are not impaired.
- a curing agent a blocked isocyanate or an epoxy-based curing agent is preferable.
- the blocked isocyanate can be made into a one-component coating composition by masking the isocyanate group with a blocking agent, and can be heat-cured at the time of forming a coating film.
- the coating composition of the present invention is useful as a primer for a polyolefin substrate.
- a polypropylene base material is preferable.
- A1 100 parts by mass of a propylene-butene copolymer (76 mol% of propylene component and 24 mol% of 1-butene component) polymerized by a metallocene catalyst, 150 parts by mass of toluene, 4 parts by mass of maleic anhydride, and didi 12 parts by mass of -ter
- A-2 to A-5 solutions were obtained by dissolving A-2 to A-5 in the same manner as the A-1 solution.
- modified polyolefin a copolymer of ethylene, ethyl acrylate, maleic anhydride, acid value 15 mgKOH / g-resin, weight average molecular weight 100,000
- Add 280 parts by mass of cyclohexane and 120 parts by mass of xylene to 100 parts by mass of Tm60 ° C., Tg-40 ° C. raise the temperature to 70 ° C. with stirring, and stir for 1 hour to obtain an A-6 solution. rice field.
- Acid value [absorbance (I) x (f) x 2 x molecular weight of potassium hydroxide x 1000 (mg) / molecular weight of succinic anhydride] Molecular weight of succinic anhydride: 100.07 Molecular weight of potassium hydroxide: 56.11
- Tm and Tg Acid-modified polyolefin
- the measurement of Tm and Tg by DSC in the present invention can be measured in accordance with JIS K7121-2012, and can be performed under the following conditions, for example.
- a DSC measuring device manufactured by Seiko Electronics Inc.
- Tm and Tg are obtained by raising the temperature to 150 ° C. at ° C./min.
- Tg refers to the midpoint glass transition temperature.
- the chlorine content of the acid-modified chlorinated polyolefin was measured by titration according to JIS K-7229-1995.
- ⁇ (Meta) Acrylic resin (B)> 15.8 parts by mass of methyl methacrylate (MMA), 23.7 parts by mass of cyclohexyl methacrylate (CHMA), 0.46 parts by mass of 2-hydroxyethyl methacrylate (HEMA), 1.2 parts by mass of ⁇ -methylstyrene dimer, polymerization.
- a mixed solution consisting of 1.8 parts by mass of perbutyl O as an initiator and 14.6 parts by mass of butyl acetate as a solvent was prepared.
- (Meta) acrylic resins B-2 to B-9 were obtained in the same manner except that the (meth) acrylic acid ester monomer was changed as shown in Table 1.
- ethylhexyl methacrylate is described as EHMA
- MAA methacrylic acid
- the coating composition shown in Example 1 was prepared as follows. Add 40 parts by mass of xylene and the pigment having the mass ratio shown in Table 1 to 500 parts by mass (A-1, 100 parts by mass) of the A-1 solution, and use a bead mill until the evaluation by the grind meter is 10 ⁇ m or less. A pigment dispersion was obtained by dispersing in. To the pigment dispersion (A-1, 100 parts by mass), add the B-1 solution so that the (meth) acrylic resin B-1 is 100 parts by mass, and then add 110 parts by mass of cyclohexane, 50 parts by mass of methyl ethyl ketone, etc. to the table. By mixing the above solvent, the coating composition shown in Example 1 was obtained.
- the coating compositions shown in Examples 2 to 11 were obtained by mixing the resin composition and the solvent in the ratio shown in the table by the method shown in Example 1.
- the ester solvent (D1), the ketone solvent (D2), and the alcohol solvent (E) were added to the pigment dispersion.
- the coating compositions shown in Comparative Examples 1 to 5 were obtained by mixing the resin composition and the solvent in the ratio shown in the table by the method shown in Example 1.
- the ester solvent (D1), the ketone solvent (D2), and the alcohol solvent (E) were added to the pigment dispersion.
- Paint Stability The following items were evaluated with respect to the paint stability of the paint compositions prepared in Examples or Comparative Examples. The results are shown in Tables 2 and 3.
- the viscosity (outflow time) of the coating composition produced in Examples or Comparative Examples was measured with a Ford cup, and the coating composition was allowed to stand at ⁇ 5 ° C. and 50 ° C. for 10 days to examine the appearance and viscosity of the coating composition. evaluated. Viscosity was measured with a Ford cup (No. 4, 25 ° C.). Evaluation Criteria ⁇ : There was no whelk or gelation, and the increase in outflow time (thickening) was within 5 seconds compared to before standing for 10 days. ⁇ : There was no whelk or gelation, and the thickening was more than 5 seconds and within 10 seconds. ⁇ : There was no whelk or gelation, but the thickening was more than 10 seconds. X: Whelk and gelation occurred, and the thickening was more than 10 seconds.
- the solvent composition at the time of coating was adjusted by blending 30 parts by mass of xylene and 30 parts by mass of toluene with respect to 100 parts by mass of the coating composition obtained in Examples or Comparative Examples.
- the adjusted coating composition will be referred to as a diluted coating composition.
- a polypropylene base material (10 cm x 10 cm) was degreased with isopropyl alcohol to form a test plate.
- the diluted coating composition prepared above was spray-coated on the test plate so as to have a dry film thickness of 10 ⁇ m.
- Retan (registered trademark) PG White (trade name, manufactured by Kansai Paint Co., Ltd.) was spray-coated on the diluted coating composition surface of the test plate as a coloring base paint so as to have a dry film thickness of 50 ⁇ m. Then, it was heated in an oven at 80 ° C. for 30 minutes to obtain a test coating plate on which a laminated coating film was formed.
- Various coating film performance tests shown below were performed on the test coating plate.
- Coating film performance test An evaluation test was conducted for each of the following items with respect to the test coating film prepared as described above. The results are shown in Tables 2 and 3.
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Abstract
Description
[2] 変性ポリオレフィン(A)100質量部に対して、(メタ)アクリル樹脂(B)が25~900質量部である[1]に記載の塗料組成物。
[3] 変性ポリオレフィン(A)の酸価が5~40 mgKOH/g-resinである前記[1]または[2]に記載の塗料組成物。
[4] 変性ポリオレフィン(A)の重量平均分子量が20,000~180,000である前記[1]~[3]のいずれかに記載の塗料組成物。
[5] 炭化水素系溶剤(C)を含有し、変性ポリオレフィン(A)100質量部に対して、炭化水素溶剤(C)を200~3000質量部含有する前記[1]~[4]に記載の塗料組成物。
[6] エステル系溶剤(D1)またはケトン系溶剤(D2)の少なくとも一方を含む前記[1]~[5]のいずれかに記載の塗料組成物。
[7] さらにアルコール系溶剤(E)を含む前記[1]~[6]のいずれかに記載の塗料組成物。
[8] 前記[1]~[7]のいずれかに記載の塗料組成物を含有するポリオレフィン基材用プライマー塗料。
本発明で用いる変性ポリオレフィン(A)は、特に限定されないが、酸変性ポリオレフィン(A1)、または酸変性塩素化ポリオレフィン(A2)であることが好ましい。これらを併用して用いることも可能である。
(メタ)アクリル樹脂(B)のTgは、0℃以上であり、好ましくは10℃以上であり、より好ましくは20℃以上である。また、150℃以下であることが好ましく、100℃以下であることがより好ましい。成膜過程では、Tgが低いほうが好ましいが、低すぎると塗膜加温時に物性が低下する可能性がある。一方で、150℃以上の場合、成膜性や架橋反応しにくくなり、塗膜物性が低下する場合がある。
1/Tg=C1/Tg1+C2/Tg2+・・・+Cn/Tgn :(FOX式)
[算出式(FOX式)において、Tgは、(メタ)アクリル酸エステル共重合体の理論Tg、Cnは、単量体nが(メタ)アクリル酸エステル共重合物(B)のモノマー混合物中に含まれる重量割合、Tgnは、単量体nのホモポリマーのTg、nは、(メタ)アクリル酸エステル共重合体(B)を構成する単量体の数であり、正の整数。]
本発明の塗料組成物は、酸変性ポリオレフィン(A)、(メタ)アクリル樹脂(B)により構成され、必要に応じて希釈することにより、本発明の塗料組成物を提供することができる。
1Lオートクレーブに、メタロセン触媒により重合されたプロピレン-ブテン共重合体(プロピレン成分76モル%および、1-ブテン成分24モル%)を100質量部、トルエン150質量部及び無水マレイン酸4質量部、ジ-tert-ブチルパーオキサイド12質量部を加え、140℃で3時間反応させた。その後、多量のメチルエチルケトンが入った容器に注ぎ、樹脂を析出させた。その後、遠心分離で未反応物などを取り除き、無水マレイン酸がグラフト重合した酸変性プロピレン-ブテン共重合体を得た。その後、減圧下60℃で5時間乾燥させることにより、酸変性プロピレン-ブテン共重合体(酸価5mgKOH/g-resin、重量平均分子量20,000、Tm70℃、Tg-20℃)を得た。この製造例により作製した酸変性ポリオレフィンをA-1とした。
撹拌機を取り付けた1Lオートクレーブに、プロピレン-エチレン共重合体100質量部、トルエン150質量部及び無水マレイン酸10質量部、ジ-tert-ブチルパーオキサイド5質量部を加え、140℃まで昇温した後、更に3時間撹拌した。その後、得られた反応液を冷却後、多量のメチルエチルケトンが入った容器に注ぎ、樹脂を析出させた。
その後、遠心分離で未反応物などを取り除き、無水マレイン酸がグラフト重合した酸変性プロピレン-エチレン共重合体を得た。その後、減圧下70℃で5時間乾燥させることにより、無水マレイン酸変性プロピレン-エチレン共重合体を得た。次いで、2Lのグラスライニング製反応缶に、無水マレイン酸変性プロピレン-エチレン共重合体を100質量部、クロロホルムを1700質量部入れ密閉にした。反応缶内の液を撹拌して分散しながら加温し、缶内温度120℃で1時間溶解した。缶内温度を110℃まで冷却した後に、t-ブチルパーオキシ-2-エチルヘキサエノエートを0.5質量部添加し、塩素を70質量部導入した。缶内温度を60℃まで冷却し、クロロホルム1400質量部を留去した。その後、乾燥することにより、無水マレイン酸変性塩素化プロピレン-エチレン共重合体(A-5、酸価15mgKOH/g-resin、塩素含有率20質量%、重量平均分子量90,000、Tg5℃)を得た。
水冷還流凝縮器と撹拌機を備えた1000mlの四つ口フラスコに、A-1を100質量部に対してシクロヘキサンを280質量部、キシレンを120質量部仕込み、撹拌しながら70℃まで昇温し、1時間撹拌することでA-1溶液を得た。
本発明における酸変性ポリオレフィン(A)の酸価(mgKOH/g-resin)は、FT-IR(島津製作所社製、FT-IR8200PC)を使用して、無水マレイン酸(東京化成製)のクロロホルム溶液によって作成した検量線から得られる係数(f)、酸変性ポリオレフィン溶液における無水コハク酸のカルボニル(C=O)結合の伸縮ピーク(1780cm-1)の吸光度(I)を用いて下記式により算出した値である。
酸価(mgKOH/g-resin)=[吸光度(I)×(f)×2×水酸化カリウムの分子量×1000(mg)/無水コハク酸の分子量]
無水コハク酸の分子量:100.07 水酸化カリウムの分子量:56.11
本発明における酸変性ポリオレフィン(A)の重量平均分子量は日本ウォーターズ社製ゲル浸透クロマトグラフAlliance e2695(以下、GPC、標準物質:ポリスチレン樹脂、移動相:テトラヒドロフラン、カラム:Shodex KF―806 + KF―803、カラム温度:40℃、流速:1.0ml/分、検出器:フォトダイオードアレイ検出器(波長254nm=紫外線))によって測定した値である。
本発明におけるDSCによるTmとTgの測定はJIS K7121-2012に準拠して測定でき、例えば以下の条件で行うことができる。DSC測定装置(セイコー電子工業製)を用い、約5mgの試料を150℃で10分間加熱融解状態を保持後、10℃/分の速度で降温して-50℃で安定保持した後、更に10℃/分で150℃まで昇温することで、TmとTgを求めた値である。ここでTgとは、中間点ガラス転移温度のことを指す。
まず、メチルメタクリレート(MMA)15.8質量部、シクロヘキシルメタクリレート(CHMA)23.7質量部、2-ヒドロキシエチルメタクリレート(HEMA)0.46質量部、α-メチルスチレンダイマー1.2質量部、重合開始剤としてパーブチルOを1.8質量部と、溶剤として酢酸ブチル14.6質量部からなる混合液を調整した。
次に、水冷還流凝縮器と撹拌機を備えた500mlの四つ口フラスコに酢酸ブチル45.4質量部を仕込み、窒素ガスにより十分に脱気し、内温を90℃まで昇温した。次いで、調整した混合液を滴下ロートで3時間滴下することにより重合を行った。滴下終了後、さらに5時間加熱熟成することで、固形分40質量%の(メタ)アクリル樹脂B-1(水酸基価5.0mgKOH/g、酸価0mgKOH/g、Tg80℃)を得た。
実施例1に示す塗料組成物は、以下の通りに作製した。A-1溶液500質量部(A-1、100質量部)に対して、キシレン40質量部、さらに表1に示す質量比の顔料を添加し、グラインドメーターによる評価が10μm以下になるまで、ビーズミルで分散することで顔料分散液を得た。顔料分散液(A-1、100質量部)に、(メタ)アクリル樹脂B-1が100質量部になるようB-1溶液を加え、次いでシクロヘキサン110質量部や、メチルエチルケトン50質量部など表に示す溶剤を混合することで、実施例1に示す塗料組成物を得た。
実施例または比較例で作製した塗料組成物の塗料安定性に関し、以下の項目について評価した。結果を表2と表3に示す。
評価基準
◎:ツブやゲル化がなく、10日間静置する前と比べて流出時間の増加(増粘)が5秒以内であった。
○:ツブやゲル化がなく、増粘が5秒を超え10秒以内であった。
△:ツブやゲル化はないが、増粘が10秒超であった。
×:ツブやゲル化が生じ、かつ増粘が10秒超であった。
実施例または比較例で得られた塗料組成物100質量部に対して、30質量部のキシレンと30質量部のトルエンを配合することで、塗装時の溶剤組成に調整した。以下、調整後の塗料組成物を希釈塗料組成物と記載する。
上記通り作成した試験塗板に関し、以下の各項目について評価試験を行った。結果を表2と表3に示す。
各試験塗板の素地に達するようにカッターで切り込みを入れ、大きさ1mm×1mmの碁盤目を100個作った。その表面に粘着セロハンテープを貼着し、20℃においてそのテープを急激に剥離した後の碁盤目塗膜の残存数を調べた。
評価基準
◎:100個残存
○:99~90個残存
△:89~41個残存
×:40個以下残存
各試験塗板を40℃の温水に10日間浸漬後、塗膜表面を観察した。
評価基準
◎:外観に全く変化がなく、非常に良好である。
○:外観にほぼ変化がなく、良好である。
×:塗膜が膨潤し、フクレ等の異常が確認される。
各試験塗板を、ガソリン/エタノール=90/10重量比の試験液中に20℃で浸し、120分経過時のふくれ、剥がれの塗面状態を観察し、下記の基準で評価した。
評価基準
◎:全く異常がない。
○:直径3mm未満のふくれ、及び又は直径3mm未満の剥がれが生じている。
×:直径3mm以上のふくれ、及び又は直径3mm以上の剥がれが生じている。
塗装板(10cm×10cm)の試験面を、素地に達するようにカッターでクロスカットを入れ、前処理した。塗装板と噴射口との距離が10cmで角度が90℃、かつ前処理のカット部分に噴射水が当たるよう塗装板をセッティングした。そこに水温80℃、水圧80barの温水を1分間噴射し続けた。噴射後の塗膜状態を観察し、以下の基準で評価した。
◎:全く剥がれが無い。
〇:塗装板の面積に対して10%未満の塗膜が剥離している。
△:塗装板の面積に対して10~50%未満の塗膜が剥離している。
×:塗装板の面積に対して50%以上の塗膜が剥離している。
Claims (8)
- ガラス転移温度が-30℃以上の変性ポリオレフィン(A)、ガラス転移温度が0℃以上であり、水酸基価が5~100mgKOH/g、もしくは酸価が0~30mgKOH/gである(メタ)アクリル樹脂(B)を含み、(メタ)アクリル樹脂を構成する(メタ)アクリル酸エステルモノマーが、メチル(メタ)アクリレート、エチル(メタ)アクリレート、シクロへキシル(メタ)アクリレート、2-エチルへキシル(メタ)アクリレート、OH基を含有する(メタ)アクリレートのいずれかを含むことを特徴とする塗料組成物。
- 変性ポリオレフィン(A)100質量部に対して、(メタ)アクリル樹脂(B)が25~900質量部である請求項1に記載の塗料組成物。
- 変性ポリオレフィン(A)の酸価が5~40 mgKOH/g-resinである請求項1または2に記載の塗料組成物。
- 変性ポリオレフィン(A)の重量平均分子量が20,000~180,000である請求項1~3のいずれかに記載の塗料組成物。
- 炭化水素系溶剤(C)を含有し、変性ポリオレフィン(A)100質量部に対して、炭化水素溶剤(C)を200~3000質量部含有する請求項1~4に記載の塗料組成物。
- エステル系溶剤(D1)またはケトン系溶剤(D2)の少なくとも一方を含む請求項1~5のいずれかに記載の塗料組成物。
- さらにアルコール系溶剤(E)を含む請求項1~6のいずれかに記載の塗料組成物。
- 請求項1~7のいずれかに記載の塗料組成物を含有するポリオレフィン基材用プライマー塗料。
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WO2024106431A1 (ja) * | 2022-11-18 | 2024-05-23 | 東洋紡エムシー株式会社 | ポリオレフィン系塗料組成物及びプライマー塗料 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024106348A1 (ja) * | 2022-11-18 | 2024-05-23 | 東洋紡エムシー株式会社 | ポリオレフィン系塗料組成物及びプライマー塗料 |
WO2024106431A1 (ja) * | 2022-11-18 | 2024-05-23 | 東洋紡エムシー株式会社 | ポリオレフィン系塗料組成物及びプライマー塗料 |
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EP4212595A1 (en) | 2023-07-19 |
JPWO2022054727A1 (ja) | 2022-03-17 |
US20230312968A1 (en) | 2023-10-05 |
KR20230066429A (ko) | 2023-05-15 |
CN116648487A (zh) | 2023-08-25 |
TW202223044A (zh) | 2022-06-16 |
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