CN114426796A - High-weather-resistance coil coating composition and application thereof - Google Patents
High-weather-resistance coil coating composition and application thereof Download PDFInfo
- Publication number
- CN114426796A CN114426796A CN202011177320.6A CN202011177320A CN114426796A CN 114426796 A CN114426796 A CN 114426796A CN 202011177320 A CN202011177320 A CN 202011177320A CN 114426796 A CN114426796 A CN 114426796A
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- Prior art keywords
- coating composition
- coil coating
- polyester resin
- agent
- resin
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- 239000008199 coating composition Substances 0.000 title claims abstract description 99
- 229920001225 polyester resin Polymers 0.000 claims abstract description 78
- 239000004645 polyester resin Substances 0.000 claims abstract description 78
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 70
- 239000002904 solvent Substances 0.000 claims abstract description 61
- 239000002318 adhesion promoter Substances 0.000 claims abstract description 44
- 229920003180 amino resin Polymers 0.000 claims abstract description 38
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 19
- 239000000758 substrate Substances 0.000 claims abstract description 12
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 10
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 7
- 239000002253 acid Substances 0.000 claims abstract description 6
- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 30
- 239000002518 antifoaming agent Substances 0.000 claims description 29
- 239000003054 catalyst Substances 0.000 claims description 28
- 229920005989 resin Polymers 0.000 claims description 14
- 239000011347 resin Substances 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 13
- 239000000049 pigment Substances 0.000 claims description 11
- 239000002270 dispersing agent Substances 0.000 claims description 10
- 229920000877 Melamine resin Polymers 0.000 claims description 9
- 239000004640 Melamine resin Substances 0.000 claims description 9
- 150000007974 melamines Chemical class 0.000 claims description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 claims description 8
- 239000012948 isocyanate Substances 0.000 claims description 7
- FYGHSUNMUKGBRK-UHFFFAOYSA-N 1,2,3-trimethylbenzene Chemical compound CC1=CC=CC(C)=C1C FYGHSUNMUKGBRK-UHFFFAOYSA-N 0.000 claims description 6
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 claims description 6
- 150000002513 isocyanates Chemical class 0.000 claims description 6
- 239000003921 oil Substances 0.000 claims description 6
- 239000006224 matting agent Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 5
- QBDAFARLDLCWAT-UHFFFAOYSA-N 2,3-dihydropyran-6-one Chemical compound O=C1OCCC=C1 QBDAFARLDLCWAT-UHFFFAOYSA-N 0.000 claims description 4
- WBIQQQGBSDOWNP-UHFFFAOYSA-N 2-dodecylbenzenesulfonic acid Chemical compound CCCCCCCCCCCCC1=CC=CC=C1S(O)(=O)=O WBIQQQGBSDOWNP-UHFFFAOYSA-N 0.000 claims description 4
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims description 4
- 229910019142 PO4 Inorganic materials 0.000 claims description 4
- 229940060296 dodecylbenzenesulfonic acid Drugs 0.000 claims description 4
- CJMZLCRLBNZJQR-UHFFFAOYSA-N ethyl 2-amino-4-(4-fluorophenyl)thiophene-3-carboxylate Chemical compound CCOC(=O)C1=C(N)SC=C1C1=CC=C(F)C=C1 CJMZLCRLBNZJQR-UHFFFAOYSA-N 0.000 claims description 4
- 239000010452 phosphate Substances 0.000 claims description 4
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 3
- 239000004593 Epoxy Substances 0.000 claims description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 3
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical class OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 claims description 3
- 150000002009 diols Chemical class 0.000 claims description 3
- MSYLJRIXVZCQHW-UHFFFAOYSA-N formaldehyde;6-phenyl-1,3,5-triazine-2,4-diamine Chemical compound O=C.NC1=NC(N)=NC(C=2C=CC=CC=2)=N1 MSYLJRIXVZCQHW-UHFFFAOYSA-N 0.000 claims description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 3
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 claims description 3
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 claims description 3
- 239000008096 xylene Substances 0.000 claims description 3
- QYMFNZIUDRQRSA-UHFFFAOYSA-N dimethyl butanedioate;dimethyl hexanedioate;dimethyl pentanedioate Chemical compound COC(=O)CCC(=O)OC.COC(=O)CCCC(=O)OC.COC(=O)CCCCC(=O)OC QYMFNZIUDRQRSA-UHFFFAOYSA-N 0.000 claims description 2
- 238000010422 painting Methods 0.000 claims description 2
- 150000007519 polyprotic acids Polymers 0.000 claims description 2
- 150000005846 sugar alcohols Polymers 0.000 claims description 2
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 claims 1
- 238000000576 coating method Methods 0.000 abstract description 43
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 34
- 239000010935 stainless steel Substances 0.000 abstract description 34
- 239000011248 coating agent Substances 0.000 abstract description 33
- 239000002184 metal Substances 0.000 abstract description 16
- 229910052751 metal Inorganic materials 0.000 abstract description 16
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000003756 stirring Methods 0.000 description 45
- 230000000052 comparative effect Effects 0.000 description 41
- 238000012360 testing method Methods 0.000 description 17
- 239000003973 paint Substances 0.000 description 16
- 239000003377 acid catalyst Substances 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 14
- 238000002156 mixing Methods 0.000 description 13
- 238000001914 filtration Methods 0.000 description 12
- 238000009472 formulation Methods 0.000 description 12
- 238000004806 packaging method and process Methods 0.000 description 12
- DNIAPMSPPWPWGF-VKHMYHEASA-N (+)-propylene glycol Chemical compound C[C@H](O)CO DNIAPMSPPWPWGF-VKHMYHEASA-N 0.000 description 11
- 229960004463 (s)- propylene glycol Drugs 0.000 description 11
- UDSFAEKRVUSQDD-UHFFFAOYSA-N Dimethyl adipate Chemical compound COC(=O)CCCCC(=O)OC UDSFAEKRVUSQDD-UHFFFAOYSA-N 0.000 description 11
- ARXJGSRGQADJSQ-UHFFFAOYSA-N propylene glycol methyl ether Substances COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 11
- 229920003270 Cymel® Polymers 0.000 description 10
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 6
- 230000003373 anti-fouling effect Effects 0.000 description 6
- 238000005034 decoration Methods 0.000 description 6
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 6
- 238000006116 polymerization reaction Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 4
- 230000032683 aging Effects 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 4
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 4
- ORWQBKPSGDRPPA-UHFFFAOYSA-N 3-[2-[ethyl(methyl)amino]ethyl]-1h-indol-4-ol Chemical compound C1=CC(O)=C2C(CCN(C)CC)=CNC2=C1 ORWQBKPSGDRPPA-UHFFFAOYSA-N 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 3
- 239000013530 defoamer Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 235000015096 spirit Nutrition 0.000 description 3
- 238000004381 surface treatment Methods 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- SRPWOOOHEPICQU-UHFFFAOYSA-N trimellitic anhydride Chemical compound OC(=O)C1=CC=C2C(=O)OC(=O)C2=C1 SRPWOOOHEPICQU-UHFFFAOYSA-N 0.000 description 3
- 229920003275 CYMEL® 325 Polymers 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 235000011037 adipic acid Nutrition 0.000 description 2
- 239000001361 adipic acid Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000005056 polyisocyanate Substances 0.000 description 2
- 229920001228 polyisocyanate Polymers 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 239000013557 residual solvent Substances 0.000 description 2
- 238000007761 roller coating Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000013638 trimer Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000010963 304 stainless steel Substances 0.000 description 1
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 1
- OWIKHYCFFJSOEH-UHFFFAOYSA-N Isocyanic acid Chemical compound N=C=O OWIKHYCFFJSOEH-UHFFFAOYSA-N 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- XLJMAIOERFSOGZ-UHFFFAOYSA-N anhydrous cyanic acid Natural products OC#N XLJMAIOERFSOGZ-UHFFFAOYSA-N 0.000 description 1
- 230000003666 anti-fingerprint Effects 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000006210 lotion Substances 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000012974 tin catalyst Substances 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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
- B05D2202/15—Stainless steel
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
Abstract
The invention provides a high-weather-resistance coil coating composition, which comprises the following components in percentage by mass: 30-80% of polyester resin; 2-15% of amino resin; 4-10% of a curing agent; 1-3% of an adhesion promoter; 1-5% of an auxiliary agent; and, the balance of solvent; the polyester resin is saturated polyester resin, the number average molecular weight Mn is 3000-20000, the hydroxyl value is 30-70mg KOH/g, the acid value is not more than 10mg KOH/g, and a molecular chain of the polyester resin contains a neopentyl structure. The high-weather-resistance coil coating composition can be directly coated on a metal substrate such as stainless steel without pretreatment, has excellent processability and adhesion, has excellent weather resistance, stain resistance, MEK resistance, corrosion resistance and wear resistance after being cured, and is mainly applied to external coating of metal coils such as stainless steel.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a weather-resistant coating for a stainless steel plate, a preparation method and application.
Background
The stainless steel has the excellent characteristics of unique mirror surface brightness, higher wear resistance, excellent corrosion resistance and the like, is widely applied to the industries of life medical treatment, home appliance decoration and landscape finishing, and gives people a gorgeous and noble feeling.
With the improvement of the requirements of people on the high-grade and diversified decoration of materials, the application development prospect of the stainless steel plate is wider and wider. However, the application development of stainless steel depends greatly on its surface treatment technology, and the surface of stainless steel is required to have excellent antifouling, protecting, polishing and antifouling effects, and the daily cleaning and maintenance of users are simple and convenient.
In the prior art, a common 304 stainless steel plate is subjected to surface treatment, so that the stainless steel plate has antifouling and stain-resistant characteristics and can keep mirror brightness in an indoor environment. However, in the outdoors, the smooth surface is corroded by sunlight and rain, and the luster is easily removed, so that the beauty of the stainless steel plate is influenced. The key to solving this problem is to improve the weatherability of stainless steel. The existing outdoor stainless steel is added with elements such as nickel, cobalt and the like on the basis of common stainless steel, so that the weather resistance is improved, but the process is complex, the production cost is higher, and the environmental pollution is serious.
Patent CN101215438B discloses a stain-resistant and aging-resistant stainless steel coating and a preparation method thereof, wherein silicon dioxide and fluorine-containing resin are used to modify acrylic acid, but the addition amount of fluorine-containing resin needs to be strictly controlled, which hinders the wide application of the coating.
Patent CN105462460B discloses an anti-fouling and fingerprint-resistant stainless steel plate water-based paint and a preparation method thereof, which mainly comprises modified water-based polyester resin and silica sol, but the corrosion resistance of the paint is less than 360h, and the paint cannot be applied to outdoor high-corrosion-resistance environment.
Therefore, it is required to provide a stainless steel surface treatment coating with high weather resistance, which has a simple coating process and can meet different conditions and the use requirements of specific environments such as indoor household appliances to outdoor solarization and the like.
Disclosure of Invention
The first purpose of the invention is to provide a single-component coating composition, which combines the primer and the topcoat in the traditional sense into a whole, so that the coating formed by curing the single-component coating composition has high interlayer bonding force and high adhesive force with a base material, has the decoration of the topcoat and can meet the requirements of diversified decoration.
A second object of the present invention is to provide the use of the above one-component coating composition, which can be directly coated on a general stainless steel substrate without performing a surface chemical treatment of the substrate. The roll coating process is a coiled roll coating process, is quick in baking, does not need pretreatment, and is simple to operate, high in production efficiency, energy-saving and efficient in process.
In order to achieve the above object, according to one aspect of the present invention, there is provided a highly weather-resistant coil coating composition comprising, in mass percent: 30-80% of polyester resin, 2-15% of amino resin, 4-10% of curing agent and 1-3% of adhesion promoter; 1-5% of an auxiliary agent; and, the balance solvent; the polyester resin is saturated polyester resin, the number average molecular weight Mn is 3000-20000, the hydroxyl value is 30-70mg KOH/g, the acid value is not more than 10mg KOH/g, and a molecular chain of the polyester resin contains a neopentyl structure.
In some embodiments, the polyester resin is polymerized from a polyol and a polyacid. Preferably, the polyester resin is polymerized from a diol and a diacid. More preferably, the polyester resin is polymerized from neopentyl glycol and a dibasic acid in the presence of an organotin catalyst.
In some embodiments, the polyester resin is prepared by polymerizing neopentyl glycol, adipic acid, isophthalic acid, terephthalic acid, and trimellitic anhydride in the presence of an organotin catalyst, followed by dilution with a solvent. Therefore, the molecular chain of the synthesized polyester resin has a neopentyl structure, so that the polyester resin has shield-shaped protection.
Further, in the polyester resin obtained by the polymerization reaction, the thermal stability and the weather resistance of a coating layer cured by the high weather resistance coil coating composition are greatly improved by the steric hindrance effect provided by the molecular side groups such as isophthalic acid, terephthalic acid and trimellitic anhydride.
Further, the polyester resin obtained by the above polymerization reaction has a highly branched dendritic structure, contains a plurality of terminal functional groups, not only provides a high hydroxyl value and high processing flexibility to the polyester resin, but also allows the polyester resin to react with an adhesion promoter-based polymer, thereby providing excellent film-forming properties to the high weather-resistant coil coating composition. Therefore, the high-weatherability coil coating composition provided by the invention can form stable chemical interaction with a substrate (especially a metal substrate) directly through the bridging link of the adhesion promoter after curing.
Further, the polyester resin obtained by the polymerization reaction has high density of a network structure, and can greatly improve the characteristics of stain resistance, fingerprint resistance, MEK resistance, abrasion resistance, corrosion resistance and the like of a coating formed by curing the high-weather-resistant coil coating composition.
Further, the polyester resin obtained by the above polymerization reaction can also help the wetting and dispersion of toner, so that the coating layer formed by curing the high weather resistance coil coating composition also has high gloss, thereby ensuring the effects of light retention and coloring of the coating layer.
In some embodiments, the amino resin is at least one of a methylated melamine resin, a butylated urea formaldehyde resin, a butylated melamine resin, and a benzoguanamine formaldehyde resin.
In some embodiments, the curing agent is an isocyanate resin. Preferably, the curing agent is a blocked isocyanate resin.
In some embodiments, the solvent is at least one of cyclohexanone, propylene glycol methyl ether acetate, ethylene glycol butyl ether, xylene, S-100 mineral spirits, S-150 mineral spirits, trimethylbenzene mineral spirits, and a mixture of dibasic esters.
In some embodiments, the adhesion promoter is an epoxy, silanol, phosphate modified polymer.
In some embodiments, the highly weatherable coil coating composition further includes an auxiliary agent that is at least one of a catalyst, a leveling agent, a defoamer, a dispersant, a pigment and a matting agent.
In some embodiments, the catalyst is a blocked sulfonic acid catalyst, the leveling agent is a non-silicon leveling agent, the defoaming agent is a non-silicon defoaming agent, and the particle size of the matting powder is less than or equal to 3 μm; and, preferably, the catalyst is at least one of dinonylnaphthalene disulfonic acid, dinonylnaphthalene sulfonic acid, dodecylbenzene sulfonic acid, and p-toluenesulfonic acid.
According to another aspect of the present invention, there is also provided a method of preparing the high weather-resistant coil coating composition as described above, comprising:
(1) adding saturated polyester resin, amino resin and curing agent into a reaction vessel in sequence, mixing and stirring uniformly;
(2) then adding the auxiliary agent under the stirring state, and adding the solvent after uniformly stirring;
(3) adjusting the viscosity to obtain the high-weather-resistance coil coating composition.
The rotating speed in the stirring process in the step (1) and the step (2) is 600-800RPM, and the stirring time is 10 minutes.
According to a further aspect of the invention, the invention also provides the use of the above-described highly weather-resistant coil coating composition in painting.
In some embodiments, in the application, the high weather resistance coil coating composition is directly coated on a substrate and cured and formed by high temperature baking.
The invention has the following beneficial effects:
the invention solves the problems of easy pulverization, reduced gloss and poor durability of the common stainless steel coating outdoors, and simultaneously endows the surface of the stainless steel with fingerprint resistance, so that the stainless steel can keep the exquisite appearance for a long time in the using process. Meanwhile, the coating formula is suitable for a roller coating process, so that the production efficiency is effectively improved, and the energy and the cost are saved.
Compared with the prior art, the invention has the advantages and positive effects that:
1) tests show that the ultraviolet light aging resistance, chalking resistance, stain resistance and paint film durability of a coating formed by curing the high-weather-resistance coil coating composition are far higher than those of common fingerprint-resistant coatings, and the coating has more excellent weather resistance;
2) tests show that the interlayer adhesion between a coating formed by curing the high-weather-resistance coil coating composition and a substrate is strong, and the high-weather-resistance coil coating composition has good processing and forming performance, excellent MEK wiping resistance effect, excellent wear resistance and durability in use;
3) the high-weather-resistance coil coating composition is a single-component coating, and is different from the existing double-component coating in that the high-weather-resistance coil coating composition can be coated in a coil form by adopting a roller coating process and quickly baked, and the coating process is simple and efficient;
4) the high-weather-resistance coil coating composition combines the traditional primer and the traditional top coat into a whole, can realize various decorations, and enables the appearance of a workpiece product to be more changed.
Detailed Description
The following detailed description of embodiments of the invention is intended to be illustrative of the invention and is not to be construed as limiting the invention. The examples do not specify particular techniques or conditions, and are performed according to the techniques or conditions described in the literature in the art or according to the product specifications. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
The invention provides a high-weather-resistance coil coating composition, which comprises the following components: polyester resin, amino resin, a curing agent, an adhesion promoter, an auxiliary agent and a solvent.
<Polyester resin>
The polyester resin is present in an amount of not less than 30% by weight, preferably not less than 40% by weight, based on the weight of the highly weatherable coil coating composition. And the polyester resin is contained in an amount of not more than 80% by mass, preferably not more than 70% by mass, more preferably not more than 60% by mass, based on the weight of the highly weather-resistant coil coating composition.
The polyester resin is a saturated polyester resin. The acid value of the polyester resin is 3-5mg KOH/g, the hydroxyl value is 60mg KOH/g, the solid content is 60 wt%, and the number average molecular weight Mn is 3700-14000.
The polyester resin is polymerized from polyhydric alcohol and polybasic acid. Preferably, the polyester resin is polymerized from a diol and a diacid. More preferably, the polyester resin is polymerized from neopentyl glycol and a dibasic acid in the presence of an organotin catalyst. Particularly, the polyester resin is prepared by carrying out polymerization reaction on neopentyl glycol, adipic acid, isophthalic acid, terephthalic acid and trimellitic anhydride under the action of an organic tin catalyst, and then diluting the obtained product by a solvent. Therefore, the molecular chain of the synthesized polyester resin has a neopentyl structure, so that the polyester resin has shield-shaped protection.
The polyester resin may be any commercially available saturated polyester resin satisfying the above description, such as, but not limited to, saturated polyester resins produced by Toyobo, Evonik, Arkema, Changxing, Kolida, SK, and the like, with specific models such as, but not limited to, SKYBON ES 420, ETERKYD 50566-R-60, VIALKYD AN 950/70X, and the like.
<Amino resin>
The amino resin is present in an amount of not less than 2% by weight, preferably not less than 3% by weight, based on the weight of the highly weather resistant coil coating composition. And the amino resin is contained in an amount of not more than 15% by mass, preferably not more than 10% by mass, based on the weight of the highly weather-resistant coil coating composition.
The amino resin is at least one of methylated melamine resin, butylated urea formaldehyde resin, butylated melamine resin and benzoguanamine formaldehyde resin. Preferably, the amino resin is one or a mixture of methylated melamine resin and butylated melamine resin. More preferably, the amino resin is methylated melamine resin, so that the cured film of the high-weather-resistance coil coating composition has high flexibility, excellent formula stability, and excellent scratch resistance and interlayer adhesion.
The amino resin may be any commercially available amino resin satisfying the above description, such as, but not limited to, cyanotex (r) manufactured amino resins, specific types such as, but not limited to, CYMEL303, CYMEL688, CYMEL 325.
<Curing agent>
The curing agent is present in an amount of not less than 4% by weight, preferably not less than 5% by weight, based on the weight of the highly weatherable coil coating composition. And the curing agent is contained in an amount of not more than 10% by mass, preferably not more than 8% by mass, based on the weight of the highly weather-resistant coil coating composition.
The curing agent is closed isocyanate resin. And (3) condensing the unblocked isocyanic acid and the alcohol to form the polyurethane resin. Exemplary isocyanate resins include, but are not limited to, polyisocyanates, such as the cyclic trimer, the cocyclic trimer of hexamethylene diisocyanate or methylene diphenyl diisocyanate, or mixtures of these polyisocyanates.
The curing agent may be any commercially available blocked isocyanate resin satisfying the above description, such as but not limited to bayer BL3175, Evonik B1358.
<Adhesion promoter>
The weight of the high-weather-resistance coil coating composition is taken as a calculation unit, and the mass percentage content of the adhesion promoter is not less than 1.0%. And the mass percentage content of the adhesion promoter is not higher than 3 percent by weight of the high-weather-resistance coil coating composition.
The adhesion promoter is epoxy, silanol and phosphate modified polymer. Preferably, the adhesion promoter is a phosphate modified polymer.
The adhesion promoter may be any commercially available adhesion promoter that meets the above description, such as, but not limited to, SN-7063, TZ8805, ADP, PAE206, Lubrizol-2063.
<Auxiliary agent>
The auxiliary agent is at least one of a catalyst, a flatting agent, a defoaming agent, a dispersing agent, a pigment and a matting agent. These adjuvants may optionally be added to the composition to aid in the flow, wetting and appearance of the coating.
If used, the coagent is present in an amount of no less than 0.01 percent by weight, preferably no less than 0.1 percent by weight, based on the weight of resin solids. And the mass percentage of the auxiliary agent is not higher than 5% based on the weight of the resin solid.
The catalyst is a blocked sulfonic acid catalyst, preferably, the catalyst is at least one of dinonylnaphthalene disulfonic acid (DNNDSA), dinonylnaphthalene sulfonic acid (DNNSA), dodecylbenzene sulfonic acid (DDBSA) and P-toluenesulfonic acid (P-TSA). The catalyst may be any commercially available blocked sulfonic acid type acid catalyst satisfying the above description, such as, but not limited to, BYK 110, BYK 115, BYK P-104, SOLSPERSE 2000. If used, the catalyst is present in an amount of no less than 0.1% by weight, based on the weight of the highly weatherable coil coating composition. And the mass percentage of the catalyst is not higher than 2 percent by weight of the high weather resistance coil coating composition.
The leveling agent is a non-silicon leveling agent. The leveling agent may be any commercially available non-silicon leveling agent that meets the above description, such as, but not limited to BYK-392, BYK-054, BYK-355, BYK-358N, AFCONA-3773 of Pico chemistry.
The defoaming agent is a non-silicon defoaming agent. The defoamer can be any commercially available non-silicon defoamer that meets the above description, such as, but not limited to, BYK-352, BYK-354, AFCONA 2720.
The dispersant is a commercially available dispersant such as, but not limited to, a DA1040 type dispersant and BYK170 dispersant, BYK180 dispersant.
The pigments are commercially available pigments such as, but not limited to, COLOUR BLACK FW200 carbon BLACK pigment and phthalocyanine blue P.B.15:2 pigment.
The matting powder is commercially available matting powder with the particle size less than or equal to 3 mu m, such as but not limited to Tosoh E-1011 matting powder and SYLOID ED-2 matting powder.
<Solvent(s)>
The solvent is at least one selected from cyclohexanone, propylene glycol methyl ether acetate, ethylene glycol butyl ether, xylene, S-100 solvent oil, S-150 solvent oil, trimethylbenzene solvent oil and dibasic ester mixture.
In the invention, the high-weatherability coil coating composition is directly coated on a substrate and is baked and cured at high temperature to form a coating on the substrate (especially a stainless steel substrate). And the resulting coating was tested.
Unless stated otherwise, the test is carried out according to the national standard GB/T13448-2006 in the following examples, and the result meets the requirements of the national standard GB/T13448-2006.
The MEK wiping resistance test requires sample preparation, test environment and test procedures as specified in GB/T13448-2006 of 10.2. The coated surface was wiped with a cotton gauze by hand, dipped in butanone solution, rubbed 100 times with an arm force of about 10N, and then compared to the non-wiped area, the area wiped with organic solution butanone (MEK) should have no visible color difference and coating breakage. The specific test method can refer to the Haier group enterprise standard Q/HR 0502008-2009.
The contamination resistance test requires sample preparation, test environment and test procedures as specified in GB/T13448-2006 of 10.2. The test piece is coated by the marker pen (red, blue and black), and after being placed for 24 hours, the surface of the test piece is not discolored after being wiped by the neutral lotion.
The weather-resistant QUVB test requires that an artificial aging resistance test is carried out by adopting UV-b aging resistance equipment of Q-Lab company according to the TB/T1527-2011 standard. The wavelength of a light source is 313nm, the irradiance is 0.71W/m2, the illumination and condensation period is 4h, the cycle is continuous, and the gloss, the color difference and the appearance change of the coating film are tested at intervals.
Example 1
The highly weatherable coil coating composition according to the present invention was prepared according to the following formulation of table 1:
table 1 example 1 highly weatherable coil coating composition
| Components | Name (R) | Amount (wt%) |
| Polyester resin | NP 5055 | 65％ |
| Amino resin | Cymel 303 | 6％ |
| Curing agent | DESMODUR BL3175A | 4％ |
| Catalyst and process for preparing same | AAC2500 | 1.0％ |
| Adhesion promoter | SN7063 | 1.5％ |
| Defoaming agent | L-T | 0.5％ |
| Leveling agent | L-C | 1％ |
| Solvent(s) | S-100 | 4％ |
| Solvent(s) | Propylene glycol methyl ether acetate | 10％ |
| Solvent(s) | DBE | 6％ |
Adding saturated polyester resin, amino resin and a curing agent into a container in sequence, mixing and stirring uniformly, then adding a catalyst, an adhesion promoter, a flatting agent and a defoaming agent under stirring, stirring uniformly, finally adding a solvent, adjusting the gloss and the viscosity as required, adjusting the viscosity of the mixture to be 100-140 seconds, measuring by using a coating-4 cup, filtering and packaging to obtain the high-weather-resistance coil coating composition.
Coating and plate making: the obtained high weather resistance coil coating composition was roll coated on a stainless steel plate with a wire bar, baked in an oven at 320 ℃ for 30s, and the sheet metal temperature PMT: 216 to 224 ℃ to give a paint film having a thickness of 8 μm.
Example 2
The highly weatherable coil coating composition according to the present invention was prepared according to the following formulation of table 2:
table 2 example 2 high weather resistance coil coating composition
| Components | Name (R) | Amount (wt%) |
| Polyester resin | NP 5055 | 54％ |
| Amino resin | Cymel 325 | 4％ |
| Curing agent | DESMODUR BL3175A | 4％ |
| Catalyst and process for preparing same | Nacure 1051 | 0.4％ |
| Adhesion promoter | SN7063 | 1.5％ |
| Defoaming agent | L-T | 0.5％ |
| Leveling agent | L-C | 1％ |
| Solvent(s) | S-100 | 4％ |
| Solvent(s) | Propylene glycol methyl ether acetate | 10％ |
| Solvent(s) | DBE | 6％ |
Adding saturated polyester resin, amino resin and a curing agent into a container in sequence, mixing and uniformly stirring, then adding an acid catalyst, an adhesion promoter, a flatting agent and a defoaming agent under stirring, uniformly stirring, finally adding a solvent, adjusting the gloss and the viscosity as required, adjusting the viscosity of the mixture to be 100-140 seconds, measuring by using a paint-4 cup, filtering and packaging to obtain the high-weather-resistance coil coating composition.
Coating and plate making: the obtained high weather resistance coil coating composition was roll coated on a stainless steel plate with a wire bar, baked in an oven at 320 ℃ for 30s, and the sheet metal temperature PMT: 216 to 224 ℃ to give a paint film having a thickness of 8 μm.
Example 3
The highly weatherable coil coating composition according to the present invention was prepared according to the following formulation of table 3:
table 3 example 3 high weather resistance coil coating composition
| Components | Name (R) | Amount (wt%) |
| Polyester resin | NP 5055 | 60％ |
| Amino resin | Cymel 688 | 4％ |
| Curing agent | DESMODUR BL3175A | 6％ |
| Catalyst and process for preparing same | Nacure 1051 | 0.6％ |
| Adhesion promoter | SN-7063 | 1.5％ |
| Defoaming agent | L-T | 0.5％ |
| Leveling agent | L-C | 1％ |
| Solvent(s) | S-100 | 4％ |
| Solvent(s) | Propylene glycol methyl ether acetate | 10％ |
| Solvent(s) | DBE | 6％ |
Adding saturated polyester resin, amino resin and a curing agent into a container in sequence, mixing and uniformly stirring, then adding an acid catalyst, an adhesion promoter, a flatting agent and a defoaming agent under stirring, uniformly stirring, finally adding a solvent, adjusting the gloss and the viscosity as required, adjusting the viscosity of the mixture to be 100-140 seconds, measuring by using a paint-4 cup, filtering and packaging to obtain the high-weather-resistance coil coating composition.
Coating and plate making: the obtained high weather resistance coil coating composition was roll coated on a stainless steel plate with a wire bar, baked in an oven at 320 ℃ for 30s, and the sheet metal temperature PMT: 216 to 224 ℃ to give a paint film having a thickness of 8 μm.
Example 4
The highly weatherable coil coating composition of the present invention was prepared according to the following formulation of table 4:
table 4 example 4 high weather resistance coil coating composition
| Components | Name (R) | Amount (wt%) |
| Polyester resin | NP 5055 | 65％ |
| Amino resin | Cymel 303 | 6％ |
| Curing agent | DESMODUR BL3175A | 8％ |
| Catalyst and process for preparing same | AAC2500 | 0.8％ |
| Adhesion promoter | Lubrizol2063 | 1.5％ |
| Defoaming agent | L-T | 0.5％ |
| Leveling agent | L-C | 1％ |
| Solvent(s) | S-100 | 4％ |
| Solvent(s) | Propylene glycol methyl ether acetate | 10％ |
| Solvent(s) | DBE | 6％ |
Adding saturated polyester resin, amino resin and a curing agent into a container in sequence, mixing and uniformly stirring, then adding an acid catalyst, an adhesion promoter, a flatting agent and a defoaming agent under stirring, uniformly stirring, finally adding a solvent, adjusting the gloss and the viscosity as required, adjusting the viscosity of the mixture to be 100-140 seconds, measuring by using a paint-4 cup, filtering and packaging to obtain the high-weather-resistance coil coating composition.
Coating and plate making: the obtained high weather resistance coil coating composition was roll coated on a stainless steel plate with a wire bar, baked in an oven at 320 ℃ for 30s, and the sheet metal temperature PMT: 216 to 224 ℃ to give a paint film having a thickness of 8 μm.
Example 5
The highly weatherable coil coating composition of the present invention was prepared according to the following formulation of table 5:
table 5 example 5 highly weatherable coil coating composition
| Components | Name (R) | Amount (wt%) |
| Polyester resin | NP 5055 | 65％ |
| Amino resin | Cymel 303 | 6％ |
| Curing agent | DESMODUR BL3175A | 6％ |
| Catalyst and process for preparing same | Nacure 1051 | 0.5％ |
| Adhesion promoter | Lubrizol2063 | 1.5％ |
| Defoaming agent | L-T | 0.5％ |
| Leveling agent | L-C | 1％ |
| Solvent(s) | S-100 | 4％ |
| Solvent(s) | Propylene glycol methyl ether acetate | 10％ |
| Solvent(s) | DBE | 6％ |
Adding saturated polyester resin, amino resin and a curing agent into a container in sequence, mixing and uniformly stirring, then adding an acid catalyst, an adhesion promoter, a flatting agent and a defoaming agent under stirring, uniformly stirring, finally adding a solvent, adjusting the gloss and the viscosity as required, adjusting the viscosity of the mixture to be 100-140 seconds, measuring by using a paint-4 cup, filtering and packaging to obtain the high-weather-resistance coil coating composition.
Coating and plate making: the obtained high weather resistance coil coating composition was roll coated on a stainless steel plate with a wire bar, baked in an oven at 320 ℃ for 30s, and the sheet metal temperature PMT: 216 to 224 ℃ to give a paint film having a thickness of 8 μm.
Example 6
The highly weatherable coil coating composition of the present invention was prepared according to the following formulation of table 6:
TABLE 6 EXAMPLE 6 highly weatherable coil coating composition
| Components | Name (R) | Amount (wt%) |
| Polyester resin | NP 5055 | 65％ |
| Dispersing agent | DA 1040 | 0.5 |
| Pigment (I) | COLOUR BLACK FW200 | 0.34 |
| Amino resin | Cymel 303 | 6％ |
| Curing agent | DESMODUR BL3175A | 6％ |
| Catalyst and process for preparing same | AAC2500 | 0.8％ |
| Adhesion promoter | Lubrizol2063 | 1.5％ |
| Defoaming agent | L-T | 0.5％ |
| Leveling agent | L-C | 1％ |
| Matting powder | E-1011 | 1.0％ |
| Solvent(s) | S-100 | 4％ |
| Solvent(s) | Propylene glycol methyl ether acetate | 10％ |
| Solvent(s) | DBE | 6％ |
Adding saturated polyester resin, S100 solvent and DA1040 into a container in sequence, mixing and stirring uniformly, then adding pigment COLOUR BLACK FW200 under stirring, stirring for 3 minutes, then grinding by using a grinder until the fineness is not more than 10 micrometers, then adding amino resin, curing agent, adhesion promoter, acid catalyst, defoaming and leveling agent and the like under stirring, stirring uniformly, adjusting color, gloss and viscosity as required, adding residual solvent, adjusting the viscosity of the mixture to be 100-140 seconds, measuring by using a coating-4 cup, filtering and packaging to obtain the high-weather-resistance coil coating composition.
Coating and plate making: the obtained high weather resistance coil coating composition was roll coated on a stainless steel plate with a wire bar, baked in an oven at 320 ℃ for 30s, and the sheet metal temperature PMT: 216 to 224 ℃ to give a paint film having a thickness of 8 μm.
Example 7
The highly weatherable coil coating composition of the present invention was prepared according to the following formulation of table 7:
table 7 example 7 high weather resistance coil coating composition
| Components | Name (R) | Amount (wt%) |
| Polyester resin | NP 5055 | 65％ |
| Dispersing agent | BYK 170 | 0.5 |
| Pigment (I) | Phthalocyanine blue P.B.15:2 | 1.6 |
| Amino resin | Cymel 303 | 6％ |
| Curing agent | DESMODUR BL3175A | 8％ |
| Catalyst and process for preparing same | Nacure 1051 | 0.5％ |
| Adhesion promoter | Lubrizol2063 | 1.5％ |
| Defoaming agent | L-T | 0.5％ |
| Leveling agent | L-C | 1％ |
| Matting powder | E-1011 | 1.0％ |
| Solvent(s) | S-100 | 4％ |
| Solvent(s) | Propylene glycol methyl ether acetate | 10％ |
| Solvent(s) | DBE | 6％ |
Adding saturated polyester resin, S100 solvent and BYK170 into a container in sequence, mixing and uniformly stirring, then adding pigment phthalocyanine blue P.B.15:2 under stirring, stirring for 3 minutes, then grinding by using a grinding machine until the fineness is not more than 10 micrometers, then adding amino resin, curing agent, adhesion promoter, acid catalyst, defoaming and leveling agent, matting powder and the like under stirring, uniformly stirring, adjusting color, gloss and viscosity as required, finally adding residual solvent, adjusting the viscosity of the mixture to be 100-140 seconds, measuring by using a paint-4 cup, filtering and packaging to obtain the high-weather-resistance coil coating composition.
Coating and plate making: the obtained high weather resistance coil coating composition was roll coated on a stainless steel plate with a wire bar, baked in an oven at 320 ℃ for 30s, and the sheet metal temperature PMT: 216 to 224 ℃ to give a paint film having a thickness of 8 μm.
Comparative example 1
The coating composition of comparative example 1 was prepared according to the formulation of table 8 below:
TABLE 8 coating composition of comparative example 1
Adding saturated polyester resin, amino resin and a curing agent into a container in sequence, mixing and uniformly stirring, then adding an acid catalyst, an adhesion promoter, a flatting agent and a defoaming agent under stirring, uniformly stirring, finally adding a solvent, adjusting the gloss and the viscosity as required, adjusting the viscosity of the mixture to be 100-140 seconds, measuring by using a paint-4 cup, filtering and packaging to obtain the coating composition with the proportion of 1.
Coating and plate making: the coating composition of the ratio 1 obtained was roll coated on a stainless steel plate with a wire bar, baked in an oven at 320 ℃ for 30s, sheet metal temperature PMT: 216 to 224 ℃ to give a paint film having a thickness of 8 μm.
It should be noted that: the polyester resin used in comparative example 1 was a 3011A type polyester resin supplied by NOROO. The hydroxyl value of the polyester resin is 20 to 30 (excluding 30) mg KOH/g, and is not within the range of the hydroxyl value of the polyester resin described in the present invention, and therefore, is not a polyester resin to which the present invention is applied. Thus, this comparative example 1 is only a comparative example.
Comparative example 2
The coating composition of comparative example 2 was prepared according to the formulation of table 9 below:
TABLE 9 coating composition of comparative example 2
| Components | Name (R) | Amount (wt%) |
| Polyester resin | YL-301(Yili) | 60％ |
| Amino resin | Cymel 303 | 6％ |
| Curing agent | DESMODUR BL3175A | 6％ |
| Catalyst and process for preparing same | AAC2500 | 1.0％ |
| Adhesion promoter | SN7063 | 1.5％ |
| Defoaming agent | L-T | 0.5％ |
| Leveling agent | L-C | 1％ |
| Solvent(s) | S-100 | 4％ |
| Solvent(s) | Propylene glycol methyl ether acetate | 10％ |
| Solvent(s) | DBE | 6％ |
And (2) sequentially adding saturated polyester resin, amino resin and a curing agent into a container, mixing and uniformly stirring, then adding an acid catalyst, an adhesion promoter, a leveling agent and a defoaming agent under stirring, uniformly stirring, finally adding a solvent, adjusting the gloss and the viscosity as required, adjusting the viscosity of the mixture to be 100-140 seconds, measuring by using a paint-4 cup, filtering and packaging to obtain the coating composition of the comparative example 2.
Coating and plate making: the resulting coating composition of comparative example 2 was wire bar roll coated on a stainless steel plate, baked in an oven at 320 ℃ for 30s, sheet metal temperature PMT: 216 to 224 ℃ to give a paint film having a thickness of 8 μm.
It should be noted that: the polyester resin used in this comparative example 2 was a polyester resin supplied by Yillie corporation as YL-301 type. The number average molecular weight Mn of the polyester resin is 2000 to 3000 (not including 3000), and is not within the range of the number average molecular weight of the polyester resin described in the present invention, and therefore is not a polyester resin to which the present invention is applied. Therefore, this comparative example 2 is merely a comparative example.
Comparative example 3
The coating composition of comparative example 3 was prepared according to the formulation of table 10 below:
TABLE 10 coating composition of comparative example 3
| Components | Name (R) | Amount (wt%) |
| Polyester resin | NP 5055 | 60％ |
| Amino resin | Cymel 303 | 8％ |
| Curing agent | DESMODUR BL3175A | 4％ |
| Catalyst and process for preparing same | AAC2500 | 1.0％ |
| Adhesion promoter | K-FLEX188 | 1.5％ |
| Defoaming agent | L-T | 0.5％ |
| Leveling agent | L-C | 1％ |
| Solvent(s) | S-100 | 4％ |
| Solvent(s) | Propylene glycol methyl ether acetate | 10％ |
| Solvent(s) | DBE | 6％ |
And (2) sequentially adding saturated polyester resin, amino resin and a curing agent into a container, mixing and uniformly stirring, then adding an acid catalyst, an adhesion promoter, a leveling agent and a defoaming agent under stirring, uniformly stirring, finally adding a solvent, adjusting the gloss and the viscosity as required, adjusting the viscosity of the mixture to be 100-140 seconds, measuring by using a paint-4 cup, filtering and packaging to obtain the coating composition of the comparative example 3.
Coating and plate making: the resulting coating composition of comparative example 3 was wire bar roll coated on a stainless steel plate, baked in an oven at 320 ℃ for 30s, sheet metal temperature PMT: 216 to 224 ℃ to give a paint film having a thickness of 8 μm.
It should be noted that: the adhesion promoter used in this comparative example 3 was K-FLEX188, available from KING corporation. The adhesion promoter improves adhesion by improving curing reactivity, rather than improving adhesion through 'bridging links' as described in the present invention, and is not an adhesion promoter suitable for use in the present invention. Therefore, this comparative example 3 is merely a comparative example.
Comparative example 4
A coating composition of comparative example 4 was prepared according to the formulation of table 11 below:
TABLE 11 coating composition of comparative example 4
| Components | Name (R) | Amount (wt%) |
| Polyester resin | NP 5055 | 25％ |
| Amino resin | Cymel 303 | 6％ |
| Curing agent | DESMODUR BL3175A | 6％ |
| Catalyst and process for preparing same | Nacure 1051 | 0.4％ |
| Adhesion promoter | K-FLEX188 | 1.5％ |
| Defoaming agent | L-T | 0.5％ |
| Leveling agent | L-C | 1％ |
| Solvent(s) | S-100 | 4％ |
| Solvent(s) | Propylene glycol methyl ether acetate | 10％ |
| Solvent(s) | DBE | 6％ |
And (2) sequentially adding saturated polyester resin, amino resin and a curing agent into a container, mixing and uniformly stirring, then adding an acid catalyst, an adhesion promoter, a leveling agent and a defoaming agent under stirring, uniformly stirring, finally adding a solvent, adjusting the gloss and the viscosity as required, adjusting the viscosity of the mixture to be 100-140 seconds, measuring by using a paint-4 cup, filtering and packaging to obtain the coating composition of the comparative example 4.
Coating and plate making: the resulting coating composition of comparative example 4 was wire bar roll coated on a stainless steel plate, baked in an oven at 320 ℃ for 30s, sheet metal temperature PMT: 216 to 224 ℃ to give a paint film having a thickness of 8 μm.
It should be noted that: first, the comparative example 4 used a polyester resin of 25% by mass, which is not within the range of the polyester resin of the present invention. Second, the adhesion promoter used in this comparative example 4 was KING providing a K-FLEX188 adhesion promoter. The adhesion promoter improves adhesion by improving curing reactivity, rather than improving adhesion through 'bridging links' as described in the present invention, and is not an adhesion promoter suitable for use in the present invention. Therefore, combining the above two points, this comparative example 4 is merely a comparative example.
Comparative example 5
A coating composition of comparative example 5 was prepared according to the formulation of table 12 below:
TABLE 12 coating composition of comparative example 5
| Components | Name (R) | Amount (wt%) |
| Polyester resin | NP 5055 | 60％ |
| Amino resin | Cymel 303 | 6％ |
| Curing agent | DESMODUR BL3175A | 8％ |
| Catalyst and process for preparing same | Nacure 1051 | 0.4％ |
| Adhesion promoter | Lubrizol2063 | 1.5％ |
| Defoaming agent | L-T | 0.5％ |
| Leveling agent | L-C | 1％ |
| Matting powder | SYLOID C809 | 0.5％ |
| Solvent(s) | S-100 | 4％ |
| Solvent(s) | Propylene glycol methyl ether acetate | 10％ |
| Solvent(s) | DBE | 6％ |
And (2) sequentially adding saturated polyester resin, amino resin and a curing agent into a container, mixing and uniformly stirring, then adding an acid catalyst, an adhesion promoter, a flatting agent, a defoaming agent and matting powder under stirring, uniformly stirring, finally adding a solvent, adjusting the gloss and the viscosity as required, adjusting the viscosity of the mixture to be 100-140 seconds, measuring by using a paint-4 cup, filtering and packaging to obtain the coating composition of the comparative example 5.
Coating and plate making: the resulting coating composition of comparative example 5 was wire bar roll coated on a stainless steel plate, baked in an oven at 320 ℃ for 30s, sheet metal temperature PMT: 224 ℃ to give a paint film having a thickness of 8 μm.
It is to be noted that the matting agent used in this comparative example 5 was a matting agent supplied by Grace under the name SYLOID C809. The matting powder has an average particle size of 8.0 μm and a particle size of more than 3 μm, and is not suitable for the matting powder of the present invention. Therefore, this comparative example 5 is only a comparative example.
The applicant carries out tests with national standard GB/T13448-2006 and obtains the test results of the properties of the coatings formed by curing the high weather resistance coil coating compositions of the invention of examples 1-7 shown in Table 13.
TABLE 13 results of testing the properties of the coatings prepared in examples 1-7 above
The applicant carried out tests in national standard GB/T13448-2006 to obtain the test results of the properties of the coatings formed by curing the coating compositions of comparative examples 1-5 shown in Table 14.
TABLE 14 results of the performance test of the coatings prepared in comparative examples 1 to 5
The test results show that the high-weather-resistance coil coating composition can be firmly combined with a stainless steel substrate, the interlayer adhesion is good, a workpiece product is easy to process and form, the formed coating has excellent fingerprint resistance, MEK resistance and weather resistance, the provided coil coating has high transparency and diversified colors, the antifouling, protecting, polishing and antifouling effects of metal products such as stainless steel and the like are enhanced after coating, and the actual requirements of further processing and decoration can be completely met.
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 or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (10)
1. A highly weatherable coil coating composition characterized in that it comprises, in mass percent:
the polyester resin is saturated polyester resin, the number average molecular weight Mn is 3000-20000, the hydroxyl value is 30-70mg KOH/g, the acid value is not more than 10mg KOH/g, and a molecular chain of the polyester resin contains a neopentyl structure.
2. The highly weatherable coil coating composition according to claim 1, wherein said polyester resin is polymerized from a polyhydric alcohol and a polybasic acid; preferably, the polyester resin is polymerized from a diol and a diacid.
3. The highly weatherable coil coating composition according to claim 1, wherein said amino resin is at least one of methylated melamine resin, butylated urea formaldehyde resin, butylated melamine resin, and benzoguanamine formaldehyde resin.
4. The highly weatherable coil coating composition according to claim 1, wherein said curing agent is an isocyanate resin; preferably, the curing agent is a blocked isocyanate resin.
5. The highly weather resistant coil coating composition as claimed in claim 1, wherein the solvent is at least one of cyclohexanone, propylene glycol methyl ether acetate, ethylene glycol butyl ether, xylene, S-100 # solvent oil, S-150 # solvent oil, trimethylbenzene solvent oil, and a dibasic ester mixture.
6. The highly weather resistant coil coating composition as claimed in claim 1, wherein the adhesion promoter is an epoxy, silanol, phosphate modified polymer.
7. The highly weatherable coil coating composition according to claim 1, further comprising an auxiliary agent, wherein the auxiliary agent is at least one of a catalyst, a leveling agent, a defoaming agent, a dispersing agent, a pigment and a matting agent.
8. The highly weather-resistant coil coating composition according to claim 7, wherein the catalyst is a blocked sulfonic acid-based catalyst, the leveling agent is a non-silicon leveling agent, the defoaming agent is a non-silicon defoaming agent, and the particle size of the matting powder is less than or equal to 3 μm; and, preferably, the catalyst is at least one of dinonylnaphthalene disulfonic acid, dinonylnaphthalene sulfonic acid, dodecylbenzene sulfonic acid, and p-toluenesulfonic acid.
9. Use of the highly weather-resistant coil coating composition according to any one of claims 1 to 8 in painting.
10. The use according to claim 9, wherein the high weather resistance coil coating composition is directly coated on a substrate and cured and formed by high temperature baking.
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| CN114773967A (en) * | 2022-05-11 | 2022-07-22 | 上海一田涂料有限公司 | Super-weather-resistant coating composition for decorating aluminum veneer and preparation method thereof |
| CN115160904A (en) * | 2022-07-28 | 2022-10-11 | 上海佑戈金属科技有限公司 | Metal base band polymer coating for automobile and building field and preparation method thereof |
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