CN114621646A - Transparent coating composition for stainless steel coiled material and preparation method thereof - Google Patents
Transparent coating composition for stainless steel coiled material and preparation method thereof Download PDFInfo
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- CN114621646A CN114621646A CN202011465243.4A CN202011465243A CN114621646A CN 114621646 A CN114621646 A CN 114621646A CN 202011465243 A CN202011465243 A CN 202011465243A CN 114621646 A CN114621646 A CN 114621646A
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- 239000008199 coating composition Substances 0.000 title claims abstract description 62
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 41
- 239000010935 stainless steel Substances 0.000 title claims abstract description 41
- 239000000463 material Substances 0.000 title claims abstract description 13
- 238000002360 preparation method Methods 0.000 title abstract description 10
- 229920003180 amino resin Polymers 0.000 claims abstract description 28
- 238000000576 coating method Methods 0.000 claims abstract description 23
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 23
- 229920005989 resin Polymers 0.000 claims abstract description 19
- 239000011347 resin Substances 0.000 claims abstract description 19
- 239000011248 coating agent Substances 0.000 claims abstract description 17
- 239000012948 isocyanate Substances 0.000 claims abstract description 17
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 17
- 229920002050 silicone resin Polymers 0.000 claims abstract description 15
- 239000002904 solvent Substances 0.000 claims abstract description 13
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 9
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 21
- 238000003756 stirring Methods 0.000 claims description 16
- 239000004925 Acrylic resin Substances 0.000 claims description 10
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 9
- 239000006072 paste Substances 0.000 claims description 9
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 239000000080 wetting agent Substances 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 6
- 229920000877 Melamine resin Polymers 0.000 claims description 6
- 239000003054 catalyst Substances 0.000 claims description 6
- -1 polytetramethylene Polymers 0.000 claims description 6
- 229920000178 Acrylic resin Polymers 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 239000002518 antifoaming agent Substances 0.000 claims description 5
- 229920001225 polyester resin Polymers 0.000 claims description 5
- 239000004645 polyester resin Substances 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 claims description 4
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 4
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 4
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 4
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- SWXVUIWOUIDPGS-UHFFFAOYSA-N diacetone alcohol Chemical compound CC(=O)CC(C)(C)O SWXVUIWOUIDPGS-UHFFFAOYSA-N 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 235000019253 formic acid Nutrition 0.000 claims description 4
- ZXEKIIBDNHEJCQ-UHFFFAOYSA-N isobutanol Chemical compound CC(C)CO ZXEKIIBDNHEJCQ-UHFFFAOYSA-N 0.000 claims description 4
- HJOVHMDZYOCNQW-UHFFFAOYSA-N isophorone Chemical compound CC1=CC(=O)CC(C)(C)C1 HJOVHMDZYOCNQW-UHFFFAOYSA-N 0.000 claims description 4
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 4
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- ATOUXIOKEJWULN-UHFFFAOYSA-N 1,6-diisocyanato-2,2,4-trimethylhexane Chemical compound O=C=NCCC(C)CC(C)(C)CN=C=O ATOUXIOKEJWULN-UHFFFAOYSA-N 0.000 claims description 2
- LIPRQQHINVWJCH-UHFFFAOYSA-N 1-ethoxypropan-2-yl acetate Chemical compound CCOCC(C)OC(C)=O LIPRQQHINVWJCH-UHFFFAOYSA-N 0.000 claims description 2
- NQBXSWAWVZHKBZ-UHFFFAOYSA-N 2-butoxyethyl acetate Chemical compound CCCCOCCOC(C)=O NQBXSWAWVZHKBZ-UHFFFAOYSA-N 0.000 claims description 2
- SVONRAPFKPVNKG-UHFFFAOYSA-N 2-ethoxyethyl acetate Chemical compound CCOCCOC(C)=O SVONRAPFKPVNKG-UHFFFAOYSA-N 0.000 claims description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 2
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 claims description 2
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 claims description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 2
- 239000004202 carbamide Substances 0.000 claims description 2
- 239000006185 dispersion Substances 0.000 claims description 2
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 2
- AZIQALWHRUQPHV-UHFFFAOYSA-N prop-2-eneperoxoic acid Chemical class OOC(=O)C=C AZIQALWHRUQPHV-UHFFFAOYSA-N 0.000 claims description 2
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 7
- 239000002932 luster Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 229920003274 CYMEL® 303 LF Polymers 0.000 description 4
- 239000013530 defoamer Substances 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000007974 melamines Chemical class 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052810 boron oxide Inorganic materials 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- IUYLTEAJCNAMJK-UHFFFAOYSA-N cobalt(2+);oxygen(2-) Chemical compound [O-2].[Co+2] IUYLTEAJCNAMJK-UHFFFAOYSA-N 0.000 description 1
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(II) oxide Inorganic materials [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007761 roller coating Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000005491 wire drawing 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
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a transparent coating composition, which comprises the following components in parts by weight: 0-100 parts of hydroxyl resin; 0-40 parts of amino resin; 0-50 parts of blocked isocyanate; 15-100 parts of organic-inorganic hybrid silicone resin; 0-30 parts of color paste; 5-30 parts of a solvent; 0-10 parts of an auxiliary agent; wherein the hydroxyl resin, the amino resin and the blocked isocyanate are not 0 part at the same time. The transparent coating composition is used for coating the surface of a stainless steel material to form a high-hardness coating film, which can prevent scratches on the surface of the metal and retain the luster of the metal surface. The invention also provides a preparation method of the transparent coating composition.
Description
Technical Field
The invention relates to the field of coatings. In particular, the invention relates to the technical field of coatings for coils, in particular to a transparent coating composition for stainless steel coils.
Background
Stainless steel materials have been widely used in many fields, such as building materials, chemical engineering, automobiles, electronics, and the like, since their unique corrosion resistance.
On the other hand, with the development of science and technology and the improvement of living standard, people have higher and higher aesthetic pursuits for decorative materials. As for the decorative material, since stainless steel itself has a characteristic gloss, it is expensive and comfortable to use for a decorative space. This has led to the widespread use of stainless steel for home decoration.
The stainless steel surface can be processed into various different types of layouts: such as wire drawing plates, mirror surface plates, frosting plates, sandblasting plates, etc., thereby imparting a high ornamental value to the stainless steel surface. However, since these treated surfaces are easily scratched or oxidized by hard objects, and thus the aesthetic effects thereof are deteriorated, there is a need for developing a coating composition or a surface treatment technique for stainless steel materials, which not only prevents the surface of stainless steel from being scratched, but also retains the characteristics of imparting more color to stainless steel.
In response to the above needs, various coating compositions or stainless steel coatings for stainless steel materials have been provided in the prior art.
For example, CN107652391A chinese invention patent application relates to an acrylic resin for water-based stainless steel and a preparation method thereof, wherein a water-based acrylic resin is disclosed, and a transparent coating with hardness of H can be obtained by applying a coating prepared from the water-based acrylic resin to the surface of stainless steel.
For another example, CN110759720A chinese patent application relates to a stainless steel coating, a method for preparing a stainless steel coating, and a method for preparing a solid phase component, wherein a stainless steel coating composed of metal oxides in the following specific ratio is disclosed: silicon dioxide, calcium oxide, boron oxide, aluminum oxide, cobaltous oxide and other materials are coated on the surface of the stainless steel, and then the stainless steel product with high temperature resistance and oxidation resistance can be prepared by a sintering method.
The stainless steel coating is used for coating the surface of a stainless steel product so as to meet the application requirement of the stainless steel product. However, the coating method of the stainless steel product is difficult to meet the increasing individual design requirements at present, and particularly difficult to meet the requirement of high hardness of the surface of the stainless steel product.
In view of the above, there is a need to develop a coating composition suitable for coating stainless steel coils by using a high-efficiency and environment-friendly roll coating method for pre-coated plates, so as to meet the increasingly wide application requirements of the back-end market.
Disclosure of Invention
An object of the present invention is to provide a clear coating composition for use in coating of the surface of, for example, a stainless steel coil to form a high-hardness coating film having protection on the surface thereof.
It is another object of the present invention to provide an organic-inorganic hybrid silicone resin for the above clear coating composition.
Still another object of the present invention is to provide the above transparent coating composition and a method for preparing an organic-inorganic hybrid silicone resin.
In order to achieve the purpose, the invention adopts the following technical scheme:
according to a first aspect of the present invention, there is provided a clear coating composition, wherein the clear coating composition comprises the following components in parts by weight:
0-100 parts of hydroxyl resin;
0-40 parts of amino resin;
0-50 parts of blocked isocyanate;
15-100 parts of organic-inorganic hybrid silicone resin;
0-30 parts of color paste;
5-30 parts of a solvent;
0-10 parts of an auxiliary agent;
wherein the hydroxyl resin, the amino resin and the blocked isocyanate are not 0 part at the same time.
Preferably, the clear coating composition comprises the following components in parts by weight:
0-60 parts of hydroxyl resin;
20-40 parts of amino resin;
2-10 parts of blocked isocyanate;
15-75 parts of organic-inorganic hybrid silicon resin;
0-10 parts of color paste;
10-30 parts of a solvent;
and 2-8 parts of an auxiliary agent.
More preferably, the clear coating composition comprises the following components in parts by weight:
40-60 parts of hydroxyl resin;
20-30 parts of amino resin;
3-5 parts of blocked isocyanate;
50-60 parts of organic-inorganic hybrid silicone resin;
0-5 parts of color paste;
10-30 parts of a solvent;
and 2-8 parts of an auxiliary agent.
Further, the hydroxyl resin comprises one or more of hydroxyl acrylic resin, modified hydroxyl acrylate resin, hydroxyl polyester resin, modified hydroxyl polyester resin or epoxy resin. Wherein the hydroxyl value of the solid part of the hydroxyl resin is in the range of 20-120mg KOH/g.
Preferably, the acrylate resin is selected from at least one or more of 7327-XS-60 available from Changxing company, LB-1555 available from Dongsheng company, and ARKEMA EEP 75 available from Akema company; the hydroxyl polyester resin is selected from OF67 made by Nippon company; the epoxy resin is selected from 609 epoxy resin sold in the market.
Further, the amino resin is at least one or more selected from the group consisting of melamine amino resin, urea amino resin and phenylamine amino resin.
Preferably, the melamine amino resin is selected from fully or partially etherified melamine resins. Wherein the fully etherified or partially etherified amino resin comprises at least one or more of methylated melamine, butylated melamine and mixed etherified amino resin.
More preferably, the amino resin is selected from at least one or more of Cymel303LF, 325, 327, 1158, ETERMINO 9115-60 amino resins commercially available from Zhan New company, or at least one or more of Luwipal018, 066, 072, 069 amino resins commercially available from Pasteur company.
Further, the blocked isocyanate is selected from at least one or more of blocked polytetramethylene 1, 4-diisocyanate, blocked polyhexamethylene 1, 6-diisocyanate, blocked poly 2,2, 4-trimethylhexane 1, 6-diisocyanate, blocked polyethylene diisocyanate and blocked poly 1, 12-dodecane diisocyanate.
Preferably, the blocked isocyanate is selected from the group consisting of the isocyanates of Colesine
BL 1100/1，
BL 3175A，
BL 3272MPA，
BL 3370MPA，
BL 3475BA/SN，
BL 4265SN，
At least one or more of BL 5375.
Further, the transparent color paste is commercially available transparent color paste. Such as clear black paste available from the Nippon company.
Further, the solvent is at least one or more selected from acetone, methyl ethyl ketone, methyl isobutyl ketone, butyl acetate, propylene glycol methyl ether acetate, propylene glycol ethyl ether acetate, ethylene glycol butyl ether acetate, ethylene glycol ethyl ether acetate, isophorone, diacetone alcohol, ethyl acetate, S100, S150, isopropanol, n-butanol, isobutanol, ethylene glycol butyl ether and propylene glycol methyl ether.
Furthermore, the auxiliary agent comprises at least one or more of a wetting agent, a leveling agent, a defoaming agent or a catalyst.
Preferably, the wetting agent is present in the clear coating composition in an amount of 0 to 0.8 parts by weight. Wherein said wetting agent is selected from TEGO @ wet28 from Digao.
Preferably, the leveling agent is 0 to 0.8 part by weight in the clear coating composition. Wherein the wetting agent is selected from BYK354 from Pico.
Preferably, the defoamer is present in the clear coating composition in an amount of 0 to 0.8 parts by weight. Wherein the defoamer is selected from TEGO @ Ariex945 available from Digao corporation.
Preferably, the catalyst is present in the clearcoat composition in an amount of 0 to 0.8 parts by weight. Wherein the catalyst is selected from XK-675 available from King.
Further, the viscosity of the transparent coating composition at 23 ℃ in T4 cup ranges from 60s to 140 s; and, the clear coating composition has a solid content of 60 to 70%.
According to a second aspect of the present invention, there is provided a method for preparing the above clear coating composition, comprising the steps of:
the following components are added in turn under stirring: hydroxyl resin, amino resin, blocked isocyanate, organic-inorganic hybrid silicon resin, color paste, solvent and auxiliary agent, and dispersing for 15-30 minutes by using a high-speed dispersion machine to uniformly mix the components to obtain the transparent coating composition, wherein the stirring speed is controlled at 1500-2000 rpm.
According to a third aspect of the present invention, there is provided an organic-inorganic hybrid silicone resin which can be used for the preparation of the above-mentioned clear coating composition. The organic-inorganic hybrid silicone resin comprises the following components in parts by weight:
5-10 parts of deionized water;
2-10 parts of isopropanol;
formic acid 0.1-1 part;
50-60 parts of tetraethoxysilane;
20-30 parts of methyltrimethoxysilane;
0.2-5 parts of silane coupling agent.
According to a fourth aspect of the present invention, there is provided a method for preparing the above organic-inorganic hybrid silicone resin, comprising the steps of:
adding deionized water, isopropanol and formic acid into a reaction container, stirring fully, then sequentially adding tetraethoxysilane, methyltrimethoxysilane and a silane coupling agent, stirring fully for at least 4 hours, and then curing for at least 12 hours to obtain the organic-inorganic hybrid silicon resin.
According to a fifth aspect of the present invention, there is provided a use of the above-described clear coating composition. The transparent coating composition is used for coating the surface of a stainless steel material.
The transparent coating composition can be applied to the surface of other metal coils besides stainless steel materials, and can ensure that the surface of the metal material has ultrahigh hardness while providing decorative effect.
The invention has the following beneficial effects:
compared with the prior art, the organic-inorganic hybrid silicone resin is introduced into the transparent coating composition, so that the transparent coating composition can form a high-hardness coating film on the surface of a coated metal such as stainless steel while meeting other performance requirements, on one hand, scratches on the surface of the metal can be avoided, and on the other hand, the special luster of the surface of the metal can be kept, so that the metal coiled material has better decoration and wider application fields.
In addition, the transparent coating composition of the present invention has a fast curing property to be suitable for a coil steel coating process of high efficiency coating. Meanwhile, according to actual requirements, the transparent coating composition can be suitable for construction modes such as spraying, roller coating and the like.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below in connection with preferred embodiments. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
EXAMPLE 1 preparation of organic-inorganic hybrid Silicone
9g of deionized water, 10g of isopropanol and 0.6g of formic acid are added into a reaction vessel, after the mixture is fully stirred, 60g of tetraethoxysilane, 20g of methyltrimethoxysilane and 0.2g of silane coupling agent (KH560) are sequentially added, after the mixture is fully stirred for 4 hours, the mixture is aged for 12 hours, and 99.8g of organic-inorganic hybrid silicone resin is obtained.
EXAMPLE 1 preparation of clear coating composition 1
The following components are added into a reaction vessel in turn according to the formula amount under the stirring state: acrylate resin LB-155560 g, amino resin Cymel303LF g, blocked isocyanate BL 31753 g, organic-inorganic hybrid silicone resin 50g prepared by the method described in example 1, solvent isopropanol 5g, ethylene glycol butyl ether 10g, flatting agent BYK3540.5 g, defoaming agent TEGO @ Ariex 9450.2 g, wetting agent TEGO @ wet 2800.3 g, and stirring for 15-30 minutes to mix them uniformly, wherein the stirring speed is controlled at 1500-2000rpm, so that 149g of transparent coating composition with 23 ℃ T4 cup viscosity of 120s and 65% solid content is obtained.
EXAMPLE 2 preparation of clear coating composition 2
The following components are added into a reaction vessel in turn according to the formula amount under the stirring state: 80g of organic-inorganic hybrid silicon resin prepared by the method described in example 1, 5g of isopropanol as a solvent, 10g of butyl cellosolve, BYK3540.5g of a flatting agent, TEGO @ Ariex 9450.2 g of a defoaming agent, TEGO @ wet 2800.3 g of a catalyst and 0.5g of XK-675 are stirred for 15-30 minutes to be uniformly mixed, wherein the stirring speed is controlled at 1500-2000 rpm. 119.5g of a clear coating composition having a T4 cup viscosity of 60s at 23 ℃ and a solids content of 70% were obtained.
EXAMPLE 3 preparation of clear coating composition 3
The following components of amino resin Cymel303LF 20g and blocked isocyanate BL 31753 g, 80g of organic-inorganic hybrid silicone resin prepared by the method described in example 1, 5g of solvent isopropanol, 10g of ethylene glycol monobutyl ether, 5g of transparent black slurry, 40.5 g of flatting agent BYK3540, defoamer TEGO @ Ariex 9450.2 g, wetting agent TEGO @ wet 2800.3 g and catalyst 0.5g of XK-675 are added into a reaction vessel in sequence according to the formula amount under the stirring state, and stirred for 15-30 minutes to be uniformly mixed, wherein the stirring speed is controlled at 1500-2000 rpm. 124.5g of a clear coating composition having a T4 cup viscosity of 60s at 23 ℃ and a solids content of 70% were obtained.
Comparative example preparation of clear coating composition as comparative example
The following components are added in turn according to the formula amount under the stirring state: the adhesive is prepared from acrylate resin LB-155560 g, amino resin Cymel303LF 20g, blocked isocyanate BL 31753 g, solvent isopropanol 5g, ethylene glycol butyl ether 10g, flatting agent BYK3540.5 g, defoaming agent TEGO @ Ariex 9450.2 g and wetting agent TEGO @ wet 2800.3 g by stirring for 15-30 minutes, and the stirring speed is controlled at 1500-2000 rpm. 99g of the clearcoat composition of the comparative example having a T4 cup viscosity of 120S at 23 ℃ and a solids content of 65% were obtained.
It should be noted that: the clear coating composition of this comparative example does not have the organic-inorganic hybrid silicone resin described in the present invention and thus is merely a comparative example.
Performance testing
The clear coat compositions of examples 1, 2 and 3 and comparative examples were tested.
The test methods are as follows:
the clear coating compositions obtained in examples 1 and 2, and examples 3 and comparative examples were coated on the surface of a stainless steel coil using a wire board, and then baked using a coil coating dedicated chain oven under baking conditions: 40-60s, and the temperature peak value PMT of the substrate plate is 224 ℃. After completion, the following properties were tested:
(1) visual appearance; (2) the thickness of the film; (3) hardness; (4) MEK resistance; (5) t-bend, the test standard of which is GB/T30791 metallic material bending test method, wherein smaller values of TC (T crack)/TT (tape off) data respectively indicate better T-bend performance. The test results are shown in table 1 below:
TABLE 1
| Coating composition | Clear coating composition 1 | Clear coating composition 2 | Clear coating composition 3 | Coating composition of comparative example 1 |
| Coated substrate | Stainless steel plate | Stainless steel plate | Stainless steel plate | Stainless steel plate |
| Visual appearance | Is flat and smooth | Is flat and smooth | Is flat and smooth | Is flat and smooth |
| Film thickness/. mu.m | 2-3 | 2-3 | 2-3 | 2-3 |
| Hardness of | 4H | 4H | 4H | 3H |
| MEK resistance | >150 | >150 | >150 | >150 |
| T-bend TC/TT | 2TC/2TT | 0TC/0TT | 0TC/0TT | 2TC/4TT |
As can be seen from the above table, the surface hardness of the stainless steel plates coated with the example clear coating compositions 1, 2 and 3 of the present invention reached 4H, whereas the surface hardness of the stainless steel plates coated with the comparative examples was only 3H. According to the results of the T-bend test, the surfaces of the stainless steel plates coated with the clear coating compositions 2, 3 had a T-bend test value of 0TC/0TT, showing excellent T-bend performance. In addition, the examples clear coating compositions 1, 2 and 3 coated stainless steel plate surface visual appearance, film thickness and MEK resistance is also better.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations and modifications can be made on the basis of the above description, and not exhaustive enumeration of all embodiments, and obvious variations and modifications can be made without departing from the scope of the present invention.
Claims (10)
1. A clear coating composition, wherein the clear coating composition comprises the following components in parts by weight:
0-100 parts of hydroxyl resin;
0-40 parts of amino resin;
0-50 parts of blocked isocyanate;
15-100 parts of organic-inorganic hybrid silicone resin;
0-30 parts of color paste;
5-30 parts of a solvent;
0-10 parts of an auxiliary agent;
wherein the hydroxyl resin, the amino resin and the blocked isocyanate are not 0 part at the same time.
2. The clear coating composition according to claim 1, wherein the hydroxyl resin comprises one or more of hydroxyl acrylic resin, modified hydroxyl acrylate resin, hydroxyl polyester resin, modified hydroxyl polyester resin or epoxy resin; preferably, the hydroxyl resin has a solid hydroxyl value in the range of 20-120mg KOH/g.
3. The clear coating composition according to claim 1 or 2, wherein the amino resin is at least one or more selected from the group consisting of melamine amino resin, urea amino resin, and phenylated amino resin; preferably, the melamine amino resin is selected from fully or partially etherified melamine resins.
4. The clear coating composition according to claim 1, wherein the blocked isocyanate is selected from at least one or more of blocked polytetramethylene 1, 4-diisocyanate, blocked polyhexamethylene 1, 6-diisocyanate, blocked poly 2,2, 4-trimethylhexane 1, 6-diisocyanate, blocked polyethylene diisocyanate, and blocked poly 1, 12-dodecane diisocyanate.
5. The clear coating composition according to claim 1, wherein the solvent is selected from at least one or more of acetone, methyl ethyl ketone, methyl isobutyl ketone, butyl acetate, propylene glycol methyl ether acetate, propylene glycol ethyl ether acetate, ethylene glycol butyl ether acetate, ethylene glycol ethyl ether acetate, isophorone, diacetone alcohol, ethyl acetate, S100, S150, isopropyl alcohol, n-butanol, isobutanol, ethylene glycol butyl ether, propylene glycol methyl ether.
6. The clear coating composition according to claim 1, wherein the auxiliary agent comprises at least one or more of a wetting agent, a leveling agent, a defoaming agent, or a catalyst.
7. The clear coating composition according to claim 1, wherein the clear coating composition has a T4 cup viscosity at 23 ℃ ranging from 60 to 140 s; the clear coating composition has a solids content of 60-70%.
8. The clear coating composition according to claim 1, wherein the organic-inorganic hybrid silicone resin comprises the following components in parts by weight:
5-10 parts of deionized water;
2-10 parts of isopropanol;
formic acid 0.1-1 part;
50-60 parts of tetraethoxysilane;
20-30 parts of methyltrimethoxysilane;
0.2-5 parts of silane coupling agent.
9. A process for preparing the clear coating composition according to any one of claims 1 to 8, comprising the steps of:
the following components are added in turn under stirring: hydroxyl resin, amino resin, blocked isocyanate, organic-inorganic hybrid silicon resin, color paste, solvent and auxiliary agent, and dispersing for 15-30 minutes by using a high-speed dispersion machine to uniformly mix the components to obtain the transparent coating composition, wherein the stirring speed is controlled at 1500-2000 rpm.
10. Use of a clear coating composition according to any one of claims 1 to 8 for coating a surface of a stainless steel material.
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| CN116445047A (en) * | 2023-04-14 | 2023-07-18 | 安徽江淮汽车集团股份有限公司 | Low-carbon renewable surface coating, preparation method and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116445047A (en) * | 2023-04-14 | 2023-07-18 | 安徽江淮汽车集团股份有限公司 | Low-carbon renewable surface coating, preparation method and application |
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