CN115785754B - Water-based weld joint coating for rotary sterilization process of eight-ingredient porridge tank - Google Patents
Water-based weld joint coating for rotary sterilization process of eight-ingredient porridge tank Download PDFInfo
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- CN115785754B CN115785754B CN202211689993.9A CN202211689993A CN115785754B CN 115785754 B CN115785754 B CN 115785754B CN 202211689993 A CN202211689993 A CN 202211689993A CN 115785754 B CN115785754 B CN 115785754B
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- 238000000576 coating method Methods 0.000 title claims abstract description 56
- 239000011248 coating agent Substances 0.000 title claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 27
- 235000021395 porridge Nutrition 0.000 title claims abstract description 18
- 230000008569 process Effects 0.000 title claims abstract description 18
- 230000001954 sterilising effect Effects 0.000 title claims abstract description 18
- 238000004659 sterilization and disinfection Methods 0.000 title claims abstract description 18
- 239000004615 ingredient Substances 0.000 title abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 14
- 239000002318 adhesion promoter Substances 0.000 claims abstract description 13
- 239000012948 isocyanate Substances 0.000 claims abstract description 10
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 10
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 8
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 8
- 239000003054 catalyst Substances 0.000 claims abstract description 8
- 239000000839 emulsion Substances 0.000 claims abstract description 8
- 239000002904 solvent Substances 0.000 claims abstract description 8
- 229920003180 amino resin Polymers 0.000 claims abstract description 7
- 239000013530 defoamer Substances 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 229920005989 resin Polymers 0.000 claims description 19
- 239000011347 resin Substances 0.000 claims description 19
- -1 2-aziridinyl ethyl Chemical group 0.000 claims description 16
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 15
- 239000001993 wax Substances 0.000 claims description 15
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 12
- ZXEKIIBDNHEJCQ-UHFFFAOYSA-N isobutanol Chemical compound CC(C)CO ZXEKIIBDNHEJCQ-UHFFFAOYSA-N 0.000 claims description 12
- 229920000728 polyester Polymers 0.000 claims description 9
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 7
- 239000004593 Epoxy Substances 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 6
- 229910019142 PO4 Inorganic materials 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 claims description 6
- 239000010452 phosphate Substances 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 6
- 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 6
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 5
- 229920000570 polyether Polymers 0.000 claims description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 4
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 claims description 4
- DXPPIEDUBFUSEZ-UHFFFAOYSA-N 6-methylheptyl prop-2-enoate Chemical compound CC(C)CCCCCOC(=O)C=C DXPPIEDUBFUSEZ-UHFFFAOYSA-N 0.000 claims description 4
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 claims description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 4
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-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
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- RWNUSVWFHDHRCJ-UHFFFAOYSA-N 1-butoxypropan-2-ol Chemical compound CCCCOCC(C)O RWNUSVWFHDHRCJ-UHFFFAOYSA-N 0.000 claims description 3
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 claims description 3
- WBIQQQGBSDOWNP-UHFFFAOYSA-N 2-dodecylbenzenesulfonic acid Chemical compound CCCCCCCCCCCCC1=CC=CC=C1S(O)(=O)=O WBIQQQGBSDOWNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 3
- 239000004203 carnauba wax Substances 0.000 claims description 3
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 3
- 229940060296 dodecylbenzenesulfonic acid Drugs 0.000 claims description 3
- 239000003999 initiator Substances 0.000 claims description 3
- 239000002480 mineral oil Substances 0.000 claims description 3
- 235000010446 mineral oil Nutrition 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 239000002981 blocking agent Substances 0.000 claims description 2
- 238000010528 free radical solution polymerization reaction Methods 0.000 claims description 2
- VLTKXLBUHZUUQP-UHFFFAOYSA-N nonyl nonane-1-sulfonate Chemical compound CCCCCCCCCOS(=O)(=O)CCCCCCCCC VLTKXLBUHZUUQP-UHFFFAOYSA-N 0.000 claims description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims 15
- 239000012855 volatile organic compound Substances 0.000 abstract description 7
- 238000010025 steaming Methods 0.000 abstract description 4
- 235000013361 beverage Nutrition 0.000 abstract description 3
- 235000013305 food Nutrition 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 2
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 18
- 238000012360 testing method Methods 0.000 description 17
- 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 description 12
- 230000029087 digestion Effects 0.000 description 9
- 238000007665 sagging Methods 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 5
- 230000005587 bubbling Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 229920000877 Melamine resin Polymers 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000003431 cross linking reagent Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
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- 238000004088 simulation Methods 0.000 description 3
- XEZCCHVCBAZAQD-UHFFFAOYSA-N 2-(aziridin-1-yl)ethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCN1CC1 XEZCCHVCBAZAQD-UHFFFAOYSA-N 0.000 description 2
- SDXAWLJRERMRKF-UHFFFAOYSA-N 3,5-dimethyl-1h-pyrazole Chemical compound CC=1C=C(C)NN=1 SDXAWLJRERMRKF-UHFFFAOYSA-N 0.000 description 2
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 2
- 239000005058 Isophorone diisocyanate Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 239000008199 coating composition Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 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 description 2
- 238000011049 filling Methods 0.000 description 2
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 2
- HJOVHMDZYOCNQW-UHFFFAOYSA-N isophorone Chemical compound CC1=CC(=O)CC(C)(C)C1 HJOVHMDZYOCNQW-UHFFFAOYSA-N 0.000 description 2
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
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- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000005028 tinplate Substances 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- WHIVNJATOVLWBW-PLNGDYQASA-N (nz)-n-butan-2-ylidenehydroxylamine Chemical compound CC\C(C)=N/O WHIVNJATOVLWBW-PLNGDYQASA-N 0.000 description 1
- QBDAFARLDLCWAT-UHFFFAOYSA-N 2,3-dihydropyran-6-one Chemical compound O=C1OCCC=C1 QBDAFARLDLCWAT-UHFFFAOYSA-N 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 229920003265 Resimene® Polymers 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 235000019400 benzoyl peroxide Nutrition 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 125000004836 hexamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
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- 239000000758 substrate Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- OPQYOFWUFGEMRZ-UHFFFAOYSA-N tert-butyl 2,2-dimethylpropaneperoxoate Chemical compound CC(C)(C)OOC(=O)C(C)(C)C OPQYOFWUFGEMRZ-UHFFFAOYSA-N 0.000 description 1
- GJBRNHKUVLOCEB-UHFFFAOYSA-N tert-butyl benzenecarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC=C1 GJBRNHKUVLOCEB-UHFFFAOYSA-N 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
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- Paints Or Removers (AREA)
Abstract
The application discloses a water-based weld joint coating for a rotary sterilization process of an eight-ingredient porridge tank, which comprises the following raw materials in percentage by weight: 30-50% of water-based acrylic resin, 5-15% of water-soluble amino resin, 0-5% of blocked isocyanate, 3-15% of solvent, 0.1-5% of wax emulsion, 0.05-1.0% of defoamer, 0.1-1.0% of flatting agent, 0.5-2.5% of adhesion promoter, 0.1-0.5% of catalyst and 25-50% of water. The coating has Volatile Organic Compound (VOC) content less than 420g/L, is suitable for forming a weld coating on a three-piece can of metal food or beverage, and particularly has stronger high-temperature steaming resistance, wear resistance and high-temperature scratch resistance because of a unique rotary sterilization process required by eight-ingredient porridge.
Description
Technical Field
The application relates to the technical field of coatings, in particular to a water-based weld joint coating for a rotary sterilization process of an eight-treasure porridge tank.
Background
Three-piece cans are composed of a can bottom, a can body and a can lid, and currently, in the manufacture of three-piece cans (e.g., food or beverage cans), the side seams of the can body are joined primarily by fusion or welding techniques. The welds so formed typically require additional coating protection.
In three-piece can manufacturing processes, the substrates covered by the weld coating often include basecoats (ketin and primer), gloss oils, and tinplate. The surface difference of the adhesive is larger, and the surface tension of the part of the finishing varnish on the current market after curing is lower, so that the welding seam coating has the appearance problems of shrinkage, thick edges, saw edges and the like. In addition, in the curing process, the requirements of no bubbling, excellent leveling property and sagging prevention property are met. After filling, three cans are subjected to high-temperature sterilization, and the finished products after filling are subjected to scratch caused by long-distance transportation, particularly, the eight-ingredient porridge needs stronger high-temperature steaming and wear resistance due to the unique rotary sterilization process, and a certain proportion of falling phenomena often occur when the common welding seam coating is used in the sterilization process of the eight-ingredient porridge.
In the related art, for example, CN 109423129B discloses an aqueous coating composition for forming side seam strips or side seam coatings on three-piece cans, but the unique rotary sterilization process of eight-ingredient porridge cans still faces the abnormal phenomenon of partial falling.
Disclosure of Invention
The application provides a water-based weld joint coating for a rotary sterilization process of eight-ingredient porridge cans, which has Volatile Organic Compound (VOC) content less than 420g/L, is suitable for forming weld joint coatings on three cans of metal foods or beverages, and particularly has stronger high-temperature steaming resistance, wear resistance and high-temperature scratch resistance because the eight-ingredient porridge needs a unique rotary sterilization process.
In order to achieve the above purpose, the embodiment of the application provides a water-based weld joint coating for a rotary sterilization process of an eight-treasure porridge pot, which comprises the following raw materials in percentage by weight: 30-50% of water-based acrylic resin, 5-15% of water-soluble amino resin, 0-5% of blocked isocyanate, 3-15% of solvent, 0.1-5% of wax emulsion, 0.05-1.0% of defoamer, 0.1-1.0% of flatting agent, 0.5-2.5% of adhesion promoter, 0.1-0.5% of catalyst and 25-50% of water.
According to the water-based weld joint coating for the rotary sterilization process of the eight-ingredient porridge can, the water-based weld joint coating has excellent leveling property and sagging resistance, can be spread on a surface with lower surface tension, has flat appearance, hardness after solidification, MEK resistance, machining property and adhesive force, has stronger wear resistance, high-temperature digestion resistance and scratch resistance, can meet the unique rotary sterilization process of the eight-ingredient porridge, is suitable for being applied to weld joint coating of the eight-ingredient porridge, is nonflammable, is a non-dangerous chemical, is safe to use, transport and store, can be transported according to common goods, does not need to use dangerous chemical special vehicles, can save logistics cost, has VOC content less than 420g/L, effectively reduces VOC content emission, reduces air pollution, and also has better guarantee on the physical health of constructors.
Optionally, the aqueous acrylic resin is polymerized by a solution polymerization method from the following raw materials: 2 to 5 percent of N, N dimethylethanolamine, 0.05 to 1.5 percent of initiator, 10 to 30 percent of styrene, 3 to 10 percent of acrylic acid, 3 to 10 percent of butyl acrylate, 5 to 20 percent of isooctyl acrylate, 2 to 8 percent of hydroxyethyl acrylate, 5 to 10 percent of glycidyl methacrylate and 1 to 5 percent of 2-aziridinyl ethyl methacrylate. 10-30% of ethylene glycol monobutyl ether and 15-35% of deionized water.
Optionally, the water-soluble amino resin is one or more of n-butanol etherified benzoguanamine formaldehyde resin, isobutanol etherified benzoguanamine formaldehyde resin, high methyl etherified benzoguanamine formaldehyde resin, partially etherified benzoguanamine formaldehyde resin and mixed etherified benzoguanamine formaldehyde resin.
Optionally, the blocking agent of the blocked isocyanate is one or more of phenol, caprolactam, toluene di-blocked isocyanate (MDI), hexamethylene di-blocked isocyanate (HDI) and isophorone di-blocked isocyanate (IPDI).
Optionally, the solvent is one or more of ethanol, propanol, isopropanol, n-butanol, isobutanol, ethylene glycol monobutyl ether, ethylene glycol monomethyl ether and propylene glycol monobutyl ether.
Optionally, the wax emulsion is one or more of polyethylene wax, polytetrafluoroethylene modified micro powder wax and palm wax.
Optionally, the leveling agent is one or more of organosilicon leveling agents and acrylic leveling agents.
Optionally, the defoamer is one or more of mineral oil, silicon dioxide, polyether siloxane and polyester.
Optionally, the adhesion promoter is one or more of epoxy phosphate, titanate and polyester alkylamine salts.
Optionally, the catalyst is one or more of p-toluenesulfonic acid, dinonylsulfonic acid, dodecylbenzenesulfonic acid and phosphoric acid.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Detailed Description
The technical scheme of the application is described below through specific examples. It is to be understood that the mention of one or more method steps of the present application does not exclude the presence of other method steps before and after the combination step or that other method steps may be interposed between these explicitly mentioned steps; it should also be understood that these examples are illustrative of the present application and are not intended to limit the scope of the present application. Moreover, unless otherwise indicated, the numbering of the method steps is merely a convenient tool for identifying the method steps and is not intended to limit the order of arrangement of the method steps or to limit the scope of the application in which the application may be practiced, as such changes or modifications in their relative relationships may be regarded as within the scope of the application without substantial modification to the technical matter.
In order to better understand the above technical solution, exemplary embodiments of the present application are described in more detail below. While exemplary embodiments of the application are shown, it should be understood that the application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.
The test materials adopted by the application are all common commercial products and can be purchased in the market.
Among them, blocked isocyanate, which is used as a crosslinking agent, is selected from at least one of phenol, caprolactam, 3, 5-dimethylpyrazole, toluene diisocyanate of butanone oxime, hexamethylene diisocyanate and isophorone diisocyanate, preferably 3, 5-dimethylpyrazole blocked hexamethylene diisocyanate and isophorone diisocyanate curing agent, and commercially available Bayhydur BL XP2706 of Kogyne company.
Wherein the water-soluble amino resin is a benzoguanamine formaldehyde resin, which is used as a cross-linking agent and is selected from at least one of n-butanol etherified benzoguanamine formaldehyde resin, isobutanol etherified benzoguanamine formaldehyde resin, high-methyl etherified benzoguanamine formaldehyde resin, partially etherified benzoguanamine formaldehyde resin, mixed etherified benzoguanamine formaldehyde resin, preferably mixed etherified benzoguanamine formaldehyde resin, and selected from the Resimene CE8824 or cyl 1123 of allnex of commercially available Indonesia.
Wherein the defoamer is at least one of mineral oil, silicon dioxide, polyether siloxane and polyester, preferably polyether siloxane copolymer, and is selected from TEGO Foamex 825 or BYK011 of commercial Digao company.
Wherein, the leveling agent is an organosilicon leveling agent, and the acrylic leveling agent is preferably polyether siloxane copolymer, and TEGO Wet280 and TEGO Tain 4100 of commercial Digao company are selected.
Wherein the catalyst is a closed sulfonic acid baking varnish curing catalyst, and is selected from at least one of closed p-toluenesulfonic acid, dinonylnaphthalene sulfonic acid, dinonylnaphthalene disulfonic acid, dodecylbenzene sulfonic acid and phosphoric acid, preferably closed dinonylnaphthalene sulfonic acid, and NACURE1419 of the King company is selected.
The solvent comprises one or more of ethanol, propanol, isopropanol, n-butanol, isobutanol, ethylene glycol monobutyl ether, ethylene glycol monomethyl ether, propylene glycol monobutyl ether and other solvents with water solubility, and preferably ethylene glycol monobutyl ether.
Wherein the wax emulsion is selected from at least one of palm wax, polytetrafluoroethylene wax, polyethylene wax and polytetrafluoroethylene modified micro powder wax, preferably polytetrafluoroethylene modified micro powder wax, and the wax emulsion prepared by commercially available Lanco TMTF1780 EFC is selected.
Wherein the adhesion promoter is one or more of epoxy phosphate, titanate and polyester alkylamine salt, preferably polyester alkylamine salt, and commercially available BYK4509 is selected, wherein the Changxing 4901 in the embodiment of the application is the adhesion promoter of epoxy phosphate, and is used for comparing and distinguishing the adhesion promoter from the preferred adhesion promoter.
Wherein the initiator is one or more of benzoyl peroxide, azobisisobutyronitrile (AIBN), tert-butyl pivaloyl peroxide, tert-butyl benzoyl peroxide and di-tert-butyl peroxide, and preferably AIBN.
The application will now be described with reference to specific examples, which are intended to be illustrative only and not limiting in any way.
Examples
The water-based weld joint coating for the eight-treasure porridge rotary sterilization process comprises the following raw material components:
TABLE 1
The preparation of the aqueous acrylic resin A comprises the following steps:
to prepare a 1Kg batch, 140g of ethylene glycol monobutyl ether was added to a 2L capacity four-necked flask and heated to 70 ℃. 150g of styrene, 50g of butyl acrylate, 100g of isooctyl acrylate, 70g of hydroxyethyl acrylate, 60g of acrylic acid, 80g of glycidyl methacrylate, 30g of 2-aziridinylethyl methacrylate, 13g of AIBN premix are placed in a separate premix vessel and the premix is pumped into a four-necked flask over 180min while maintaining the temperature of the four-necked flask at 70 ℃. After the pumping was completed, the premix vessel and piping were rinsed with 10g of ethylene glycol monobutyl ether and maintained at temperature for 60 minutes. Then adding a mixture of 1g of AIBN and 5g of ethylene glycol monobutyl ether, keeping the temperature for 60min, and repeatedly adding the mixture of 1g of AIBN and 5g of ethylene glycol monobutyl ether until the conversion rate is more than 99%. 45.0g of N, N-dimethylethanolamine was added and kept for 15 minutes, 240g of deionized water was added dropwise, and the dropwise addition took 30 minutes. After the completion of the dropwise addition, stirring for another 30min until stirring is uniform, and filtering out a reaction product.
The preparation of the aqueous acrylic resin B comprises the following steps:
to prepare a 1Kg batch, 140g of ethylene glycol monobutyl ether was added to a 2L capacity four-necked flask and heated to 70 ℃. 150g of styrene, 100g of butyl acrylate, 160g of isooctyl acrylate, 70g of hydroxyethyl acrylate, 60g of acrylic acid, 13g of AIBN premix are added to a separate premix vessel and the premix is pumped into a four-necked flask over 180 minutes while maintaining the temperature of the four-necked flask at 70 ℃. After the pumping was completed, the premix vessel and piping were rinsed with 10g of ethylene glycol monobutyl ether and maintained at temperature for 60 minutes. Then adding a mixture of 1g of AIBN and 5g of ethylene glycol monobutyl ether, keeping the temperature for 60min, and repeatedly adding the mixture of 1g of AIBN and 5g of ethylene glycol monobutyl ether until the conversion rate is more than 99%. 45.0g of N, N-dimethylethanolamine was added and kept for 15 minutes, 240g of deionized water was added dropwise, and the dropwise addition took 30 minutes. After the completion of the dropwise addition, stirring for another 30min until stirring is uniform, and filtering out a reaction product.
Preparing a water-based welding seam coating:
1) Adding the water-based acrylic resin and ethylene glycol monobutyl ether into a dispersing cylinder according to the formula of the table 1, and dispersing for 5min at the rotating speed of 500 r/min;
2) Adding water-soluble amino resin, blocked isocyanate, a leveling agent, a defoaming agent, a catalyst and an adhesion promoter, and dispersing at 700r/min for 15-20min;
3) Adding wax emulsion under stirring, and dispersing part of water at 700r/min for 15-20min;
4) And adding the rest water under the stirring state until the water is stirred uniformly, and filtering to obtain the water-based coating for the welding seam.
Test examples
The three-piece tank solvent type weld coating HyCan7111 product of the water-based weld coating prepared in the above example was used as a comparative sample.
The preparation method of the coating comprises the following steps:
after the tinplate is subjected to surface treatment, a test sample is scraped and coated by a wire rod, baked for at least 20 seconds at the peak temperature of 200-220 ℃, and then cooled to obtain a coating. The thickness of the obtained coating is 7-9 g/square meter.
Test item:
hardness, gloss, abrasion resistance, scratch resistance at room temperature, scratch resistance at 70 ℃, voc emission, adhesion, baking bubbling, sagging resistance, retort resistance, impact resistance, melamine migration.
1. Pencil hardness test: according to GB/T6739, the maximum pencil hardness without breaking the coating by plowing is measured with a Chinese pencil.
2. Film gloss test: according to GB/T9754, the 60℃angular gloss of the coating is measured with a gloss meter.
3. Abrasion resistance: the two coatings were rubbed back and forth in point contact under a load of 500g using a rubbing machine test, expressed as the number of times the coating film was worn. The larger the value, the better.
4. Scratch resistance: according to GB/T9279, a scratch tester is used for measuring the minimum load value of the scratch-through coating, namely the scratch resistance value of the coating. The larger the value, the better.
5. Scratch resistance (70 ℃): the printing template was placed on a digital display heater and heated to 70 ℃. According to GB/T9279, a scratch tester is used for measuring the minimum load value of the scratch-through coating, namely the scratch resistance value of the coating. The larger the value, the better.
6. Voc content test: according to GB 23985-2009, the specific weight and the solid content of a paint sample to be detected are measured, and the VOC content (unit g/L) of the paint sample to be detected is calculated.
7. Adhesion test: according to GB/T1720, 6 crisscross lattices with 1mm intervals are marked on the coating by using a hundred lattice knife, and then the positions of the marked lattices are torn by using an adhesive tape, so that the coating is visually detached.
8. Baking bubbling test: the coating is scraped by a sagging machine, and the coating is flatly baked for 50s in a 270 DEG oven, and the maximum thickness of the coating, which does not generate bubbling phenomenon, is tested, and the larger the value is, the better the value is.
9. Sag resistance test: and (5) scraping and coating by using a sagging instrument, standing for 10 minutes, and observing the maximum thickness without sagging. The larger the value, the better.
10. Test of retort resistance: according to GB/T1733, after coating sample preparation, a high-pressure vertical sterilizer is used for observing whether the coating has the abnormality of water vapor permeation, whitening and the like through high-temperature digestion of a water phase and a steam phase at 130 ℃ for 65 min.
11. Impact resistance test: according to GB/T1732, a 1KG heavy hammer of an impact tester is used for hammering the coating to be tested at a height of 50cm, and whether the coating has cracks, solar spots and other anomalies after impact is observed.
12. Melamine migration test: according to GB/T31604-2016, 4% acetic acid is used as a simulation liquid, a coating film to be detected is soaked in the simulation liquid at 70 ℃ for 1h and 60 ℃ for 10 days, and then the melamine content in the simulation liquid is detected by a liquid chromatograph.
13. RC box digestion test: the paint is obtained by impact of an RC box die after being plated, and is subjected to high-temperature digestion test, and compared with the phenomenon after digestion, the paint is optimal in grade 1 and worst in grade 4.
Table 2 results of performance testing of example and comparative coatings
As can be seen from Table 2, the abrasion resistance, scratch resistance, and high Wen Naigua properties of example 1 were all better than those of example 2 and the comparative sample, and the properties were comparable to those of both. Example 3 the coating formulation did not contain other crosslinking agents and adhesion promoters, and although exhibiting poor overall performance, it was also demonstrated that the resin itself was self-crosslinking. Examples 4,5 and 6 show that the addition of excessive epoxy phosphate adhesion promoter can result in poor high-temperature digestion resistance, while the polyester alkylamine salt used in the application has better high-temperature digestion resistance than the polyester alkylamine salt, and the self-made resin added with glycidyl methacrylate and 2-aziridinylethyl methacrylate can ensure better high-temperature digestion resistance in the excessive epoxy phosphate adhesion promoter, thus indicating stronger high-temperature digestion resistance. In conclusion, the water-based weld joint coating for the eight-ingredient porridge rotary sterilization process disclosed by the application has better wear resistance, high-temperature steaming resistance and high Wen Naigua property under the condition that other basic performances are guaranteed to meet the use requirement, and can meet the unique rotary sterilization process of the eight-ingredient porridge tank.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms should not be understood as necessarily being directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.
While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (9)
1. The water-based weld joint coating for the rotary sterilization process of the eight-treasure porridge tank is characterized by comprising the following raw materials in percentage by weight: 30-50% of aqueous acrylic resin, 5-15% of water-soluble amino resin, 0-5% of blocked isocyanate, 3-15% of solvent, 0.1-5% of wax emulsion, 0.05-1.0% of defoamer, 0.1-1.0% of flatting agent, 0.5-2.5% of adhesion promoter, 0.1-0.5% of catalyst and 25-50% of water; the aqueous acrylic resin is polymerized by the following raw materials through a solution polymerization method: 2-5% of N, N dimethylethanolamine, 0.05-1.5% of an initiator, 10-30% of styrene, 3-10% of acrylic acid, 3-10% of butyl acrylate, 5-20% of isooctyl acrylate, 2-8% of hydroxyethyl acrylate, 5-10% of glycidyl methacrylate, 1-5% of 2-aziridinyl ethyl methacrylate, 10-30% of ethylene glycol monobutyl ether and 15-35% of deionized water.
2. The water-based weld joint coating according to claim 1, wherein the water-soluble amino resin is one or more of n-butanol etherified benzomelamine formaldehyde resin, isobutanol etherified benzomelamine formaldehyde resin, high-methyl etherified benzomelamine formaldehyde resin, partially etherified benzomelamine formaldehyde resin and mixed etherified benzomelamine formaldehyde resin.
3. The aqueous weld coating of claim 1, wherein the blocking agent of the blocked isocyanate is one or both of phenol and caprolactam.
4. The water-based weld joint coating according to claim 1, wherein the solvent is one or more of ethanol, propanol, isopropanol, n-butanol, isobutanol, ethylene glycol monobutyl ether, ethylene glycol monomethyl ether, and propylene glycol monobutyl ether.
5. The water-based weld joint coating according to claim 1, wherein the wax emulsion is one or more of polyethylene wax, polytetrafluoroethylene modified micro powder wax and palm wax.
6. The water-based weld joint coating according to claim 1, wherein the leveling agent is one or more of an organosilicon leveling agent and an acrylic leveling agent.
7. The water-based weld joint coating according to claim 1, wherein the defoamer is one or more of mineral oil, silica, polyether siloxane and polyester.
8. The water-based weld coating of claim 1, wherein the adhesion promoter is one or more of epoxy phosphate, titanate, and polyester alkylamine salts.
9. The water-based weld joint coating according to claim 1, wherein the catalyst is one or more of p-toluenesulfonic acid, dinonylsulfonic acid, dodecylbenzenesulfonic acid and phosphoric acid.
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