CN117229676A - Antirust water-based paint composition and coating - Google Patents
Antirust water-based paint composition and coating Download PDFInfo
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- CN117229676A CN117229676A CN202210639993.1A CN202210639993A CN117229676A CN 117229676 A CN117229676 A CN 117229676A CN 202210639993 A CN202210639993 A CN 202210639993A CN 117229676 A CN117229676 A CN 117229676A
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- rust inhibitor
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- 238000000576 coating method Methods 0.000 title claims abstract description 36
- 239000011248 coating agent Substances 0.000 title claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 239000000203 mixture Substances 0.000 title claims abstract description 14
- 239000003973 paint Substances 0.000 title abstract description 21
- 239000008199 coating composition Substances 0.000 claims abstract description 47
- 238000003618 dip coating Methods 0.000 claims abstract description 25
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 24
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000000049 pigment Substances 0.000 claims abstract description 22
- 239000000758 substrate Substances 0.000 claims abstract description 14
- 239000008367 deionised water Substances 0.000 claims abstract description 10
- 229910021641 deionized water Inorganic materials 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
- 238000004040 coloring Methods 0.000 claims abstract description 7
- 239000000945 filler Substances 0.000 claims abstract description 7
- 239000013556 antirust agent Substances 0.000 claims abstract description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 45
- 239000003112 inhibitor Substances 0.000 claims description 32
- 238000000518 rheometry Methods 0.000 claims description 14
- 239000000080 wetting agent Substances 0.000 claims description 13
- 239000013530 defoamer Substances 0.000 claims description 12
- 230000002401 inhibitory effect Effects 0.000 claims description 11
- 239000000839 emulsion Substances 0.000 claims description 10
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 10
- 239000002270 dispersing agent Substances 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 6
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 claims description 6
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 claims description 6
- 229910000165 zinc phosphate Inorganic materials 0.000 claims description 6
- -1 calcium strontium phosphosilicic acid Chemical compound 0.000 claims description 5
- 239000002671 adjuvant Substances 0.000 claims description 2
- 239000004927 clay Substances 0.000 claims description 2
- 238000004132 cross linking Methods 0.000 claims description 2
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical class O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 2
- 239000006185 dispersion Substances 0.000 claims description 2
- KWLMIXQRALPRBC-UHFFFAOYSA-L hectorite Chemical compound [Li+].[OH-].[OH-].[Na+].[Mg+2].O1[Si]2([O-])O[Si]1([O-])O[Si]([O-])(O1)O[Si]1([O-])O2 KWLMIXQRALPRBC-UHFFFAOYSA-L 0.000 claims description 2
- 229910000271 hectorite Inorganic materials 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- 239000002562 thickening agent Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 4
- 238000010008 shearing Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 150000003839 salts Chemical class 0.000 abstract description 2
- 239000007921 spray Substances 0.000 abstract description 2
- 238000000889 atomisation Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 15
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical group O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 11
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 11
- 239000000843 powder Substances 0.000 description 10
- 239000006229 carbon black Substances 0.000 description 8
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- CUVLMZNMSPJDON-UHFFFAOYSA-N 1-(1-butoxypropan-2-yloxy)propan-2-ol Chemical compound CCCCOCC(C)OCC(C)O CUVLMZNMSPJDON-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000009472 formulation Methods 0.000 description 5
- 239000006254 rheological additive Substances 0.000 description 5
- RWNUSVWFHDHRCJ-UHFFFAOYSA-N 1-butoxypropan-2-ol Chemical compound CCCCOCC(C)O RWNUSVWFHDHRCJ-UHFFFAOYSA-N 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 235000010215 titanium dioxide Nutrition 0.000 description 4
- 239000001038 titanium pigment Substances 0.000 description 4
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000009775 high-speed stirring Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CUDYYMUUJHLCGZ-UHFFFAOYSA-N 2-(2-methoxypropoxy)propan-1-ol Chemical compound COC(C)COC(C)CO CUDYYMUUJHLCGZ-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- RNFAKTRFMQEEQE-UHFFFAOYSA-N Tripropylene glycol butyl ether Chemical compound CCCCOC(CC)OC(C)COC(O)CC RNFAKTRFMQEEQE-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000001023 inorganic pigment Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 150000001622 bismuth compounds Chemical class 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 239000004210 ether based solvent Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical class OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
Abstract
The invention belongs to the technical field of dip coating, and relates to an antirust water-based paint composition and a coating formed by the same. Specifically, the antirust aqueous coating composition comprises the following components in parts by weight: 50-70 parts of aqueous single-component acrylic resin; 3-5 parts of coloring pigment; 10-15 parts of filler; 2-8 parts of antirust agent; 1-10 parts of an auxiliary agent; 5-15 parts of deionized water. As a single-component acrylic coating, the coating composition is simple and convenient to construct, has no construction window limitation, and has good water resistance and salt spray resistance. In addition, the coating composition also has excellent rheological property, is more suitable for dip coating technology, has larger environmental latitude on construction temperature, humidity and the like, forms a smooth and larger film thickness paint film on the surface of an object by adopting a dip coating mode under the condition of lower viscosity and no shearing atomization, and improves the protection performance on a substrate while ensuring the appearance.
Description
Technical Field
The invention belongs to the technical field of dip coating, and relates to an antirust water-based paint composition and a coating formed by the same. In particular to a water-based paint composition suitable for dip coating and rust prevention and a coating formed by the water-based paint composition.
Background
Dip coating is a coating process that is often employed in the coating of large-scale industrial machinery and components thereof. When the object to be coated has larger volume and more complex structure, compared with the traditional spraying process, the dip coating process can shorten the coating time and save the consumption of the coating.
The aqueous single-component acrylic acid coating is free from the limitation of an activation period due to the low content of volatile organic compounds, can be continuously recycled in a dip coating tank, has high drying speed, is suitable for fast-paced production of a production line, does not need high-temperature baking, and saves energy. Therefore, based on the characteristics, the aqueous single-component acrylic coating is very suitable for dip coating modes.
However, in the dip coating process, the coating cannot be sheared and atomized by a spray gun, and is naturally leveled by gravity. While the leveling of the coating can be enhanced by reducing the viscosity of the coating, this necessarily reduces the thickness of the film formed on the workpiece, lessens the protective properties of the coating against the workpiece, and often also results in the need for additional phosphating, acid washing, etc. pretreatment processes to desirably complement the performance deficiencies of the coating itself.
In view of the deficiencies of the prior art coatings for dip coating processes, the inventors of the present invention have desired to use specific combinations of rheology and leveling aids to allow the coating to be applied in a wide range of temperature and humidity environments while achieving desirable film thickness and good flatness.
Disclosure of Invention
In order to overcome the above-mentioned shortcomings of the existing dip coating, the present invention provides a water-based coating composition suitable for dip coating and rust prevention and application thereof.
In a first aspect, the present invention provides an antirust aqueous coating composition comprising, in parts by weight: 50-70 parts of aqueous single-component acrylic resin, 3-5 parts of coloring pigment, 10-15 parts of filler, 2-8 parts of antirust agent, 1-13 parts of auxiliary agent and 5-15 parts of deionized water.
Preferably, the antirust coating composition comprises, by weight, 55-60 parts of an aqueous single-component acrylic resin, 3-5 parts of a coloring pigment, 10-15 parts of a filler, 2-8 parts of an antirust agent and 1-13 parts of an auxiliary agent, and 6-10 parts of deionized water.
Further, the rust inhibitor includes a rust inhibitor and/or a rust inhibitive pigment.
Further, the rust inhibitor includes a first rust inhibitor and a second rust inhibitor. The first rust inhibitor may be the same or different from the second rust inhibitor.
Further, the rust inhibitor is selected from at least one or a combination of a plurality of Ascotec model number of Asconium-143 or Acotran H-10 rust inhibitor.
Further, the rust inhibitive pigment is selected from the group consisting of at least two or more of aluminum tripolyphosphate, zinc phosphate, calcium strontium phosphosilicic acid. More preferably, the rust inhibitive pigment is a combination selected from the group consisting of aluminum tripolyphosphate, zinc phosphate, and calcium strontium phosphosilicic acid, the weight ratio of the three components being 1:2:3.
Further, the aqueous one-component acrylic resin is selected from a self-crosslinking aqueous acrylic dispersion and/or an aqueous styrene-acrylic emulsion. Preferably, the aqueous one-component acrylic resin may be an aqueous styrene-acrylic emulsion having a molecular weight of 4000-6000, for example, a commercially available aqueous styrene-acrylic emulsion, for example, neoCryl XK-85 (available from Dissman).
Further, the colored pigment is an inorganic pigment or an organic pigment. Preferably, the inorganic pigment is titanium white or carbon black. Still further, the colored pigment was TI-PURE R-960 titanium pigment (available from DuPont) and MA-100 carbon black powder (available from Mitsubishi).
Further, the auxiliary agent comprises 3 to 10 parts of film forming auxiliary agent, 2 to 5 parts of dispersing agent, 0.1 to 1 part of defoaming agent, 0.3 to 1 part of substrate wetting agent and 0.1 to 1 part of rheological auxiliary agent by weight.
Still further, the film forming aid is a solvent for alcohol ethers. Preferably, the film forming aid is selected from at least one or a combination of more of dipropylene glycol butyl ether, propylene glycol butyl ether, dipropylene glycol methyl ether, alcohol ester-12, or tripropylene glycol butyl ether solvents. More preferably, the coalescent includes at least two coalescents. The film forming aid comprises dipropylene glycol methyl ether, dipropylene glycol butyl ether and/or tripropylene glycol butyl ether.
Still further, the dispersant is selected from one or more of Px4585 from Basoff, byk-2015 from Pick or 688W from Ucat.
Still further, the defoamer is selected from one or more of FoamStar SI2280, TEGO Foamex 810, BYK-024, BYK-028, or modified dimethylpolysiloxane defoamer.
Further, the substrate wetting agent is an organomodified siloxane. Preferably, selected from the group consisting of BYK-381, a winning company TEGO 280. The substrate wetting agent is effective in reducing the surface tension of the coating.
Further, the rheological additive is at least one or a combination of a plurality of organically modified montmorillonite clay rheological additive and easily dispersible hectorite clay rheological additive. Preferably, the combination of at least one or more of Bentone LT, bentone DE, from the company hamming.
Still further, the rheology aid is a nonionic polyurethane associative thickener. Preferably, the composition is selected from at least one or a combination of a plurality of the following ceramic company RM-8w, ceramic company RM-12w and Ming Ling company Pur-65. The rheological additive can effectively regulate the rheological property of the paint under the conditions of low-speed shearing and high-speed shearing.
In a second aspect, the present invention provides an acrylic coating prepared from the rust inhibitive aqueous coating composition described above.
The aqueous coating composition provided by the invention can be used for improving the film thickness of a paint film formed by dip coating in a wider temperature and humidity environment, and has better antirust effect and good paint film flatness. Furthermore, the coating prepared by dip coating the water-based coating composition can be widely applied to external coating of industrial and household products, and further the coating can be used as a water-based primer-topcoat anti-corrosion coating for dip coating production lines.
Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following advantages:
(1) The antirust aqueous coating composition adopts a liquid rust inhibitor, and can generate a compact indissolvable adhesion layer on the surface. When the coating is applied to the surface of steel, the coating can react with iron ions to generate a compact passivation film, thereby achieving the anti-corrosion effect and having the decorative performance.
(2) The acrylic acid coating prepared by the antirust water-based coating composition is easy to construct, is not limited by a construction window, has low organic volatile content in the coating, is quick in drying speed, and has good water resistance and salt fog resistance.
(3) The antirust water-based paint composition provided by the invention is suitable for dip-coating and coating processes, has low construction temperature and humidity conditions, and has high latitude. The film thickness of the paint film can be ensured to be higher and good flatness can be obtained under the environment condition that the ambient temperature is 5-30 ℃ and the relative humidity is 25-70% through laboratory simulation.
Drawings
FIG. 1 shows the viscosity profile of aqueous coating compositions under test conditions in two examples of the present invention.
Figures 2 to 8 show photographs of dip-coating films of the aqueous coating compositions prepared in examples 1 to 3 and comparative examples 1 to 4, respectively, below the present application under high temperature and high humidity conditions.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it should be understood that the present invention is not limited to the embodiments described below, and the inventive concept, technical solution of the present invention may be implemented in combination with other technical features or solutions limited in the art.
In the following description of the specific embodiments, for the sake of clarity in explaining the structure and operation of the present invention, it is to be understood that the words "forward", "aft", "left", "right", "outer", "inner", "outer", "inward", "axial", "radial", and the like are words of description only and are not to be construed as limiting.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as describing or implying relative importance or implying a number of indicated features. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly specified otherwise.
Each aspect or embodiment defined herein may be combined with any other aspect or embodiment unless clearly stated to the contrary. In particular, any feature indicated as being preferred or advantageous may be combined with any other feature or features indicated as being preferred or advantageous.
As used herein, the term "rust inhibitive pigment" refers to pigments that are aimed at improving corrosion resistance. Such rust inhibitive materials may be, for example, zinc oxide, phosphite compounds, phosphate compounds, molybdate-based compounds, bismuth compounds, metal ion-exchanged silica, and the like.
The technical scheme of the present invention will be described below with reference to specific examples, but various raw materials of the present invention are commercially available or prepared according to conventional methods in the art unless specifically described. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Any method or material similar to that described may be used in the method of the present invention.
Example 1: aqueous coating composition 1
In example 1, an aqueous one-part acrylic coating composition was prepared that included the following components. The coating composition forms a coating with good protective properties based on an aqueous acrylic one-component resin and a rust inhibitor. The water-based coating composition 1 comprises the following components in parts by weight based on 100 parts by weight:
auxiliary agent
Wherein:
60 parts of an aqueous acrylic single component resin which is NeoCryl XK-85 aqueous styrene-acrylic emulsion (from Dissmann Corp);
5 parts of a coloring pigment comprising 4.5 parts of TI-PURE R-960 titanium pigment (from DuPont) and 0.5 part of MA-100 carbon black powder (from Mitsubishi Co);
2.5 parts of rust inhibitive pigment comprising 0.5 part of aluminum tripolyphosphate, 1 part of zinc phosphate, 1.5 parts of nubriox-302 (available from Neofi Lai Co., ltd.)
3 parts of dispersant include 2.5 parts 688W (from Utility card chemical) and 0.5 parts PX4585 (from Basoff);
the rust inhibitor is a mixed rust inhibitor comprising 1.2 parts Asconium-143 and 0.3 parts Acotran H-10 (available from Ascotec corporation);
the film forming auxiliary agent is a two-component mixed film forming auxiliary agent and comprises 2 parts of propylene glycol butyl ether and 2 parts of dipropylene glycol butyl ether;
the defoamer is a mixed defoamer comprising 0.3 part BYK-028 (available from pick corporation) and 0.1 part Tego 810 (available from basf win-creation corporation);
the substrate wetting agent was 0.3 parts Tego280 (available from win-creating company);
the rheology aid is a mixed rheology aid comprising 0.1 part Bentone LT (available from hamming company) and 0.3 part RM-8W (available from dow company).
Specifically, in this example, the coating composition 1 was prepared by the following method.
The TI-PURE R-960 titanium white powder, MA-100 carbon black powder, antirust pigment, filler and rheological additive are adopted to be sanded together with deionized water and dispersing agent in advance, and the fineness is below 10 mu m, so that the gray color paste is prepared.
Further, a rust inhibitor Asconium-143 is dispersed in gray color paste, then added into XK-85 styrene-acrylic emulsion under the condition of high-speed stirring, and then the defoamer, the substrate wetting agent, the film forming auxiliary agent, deionized water, the rust inhibitor Acotran H-10 and the rheological auxiliary agent are sequentially added, so that the uniformly mixed aqueous single-component acrylic coating composition 1 is obtained.
Example 2: aqueous coating composition 2
In example 2, an aqueous one-part acrylic coating composition was prepared that included the following components. The coating composition forms a coating with good protective properties based on an aqueous acrylic one-component resin and a rust inhibitor. The water-based coating composition 2 comprises the following components in parts by weight based on 100 parts by weight:
auxiliary agent
Wherein:
60 parts of an aqueous acrylic single component resin which is NeoCryl XK-85 aqueous styrene-acrylic emulsion (from Dissmann Corp);
5 parts of a coloring pigment comprising 4.5 parts of TI-PURE R-960 titanium pigment (from DuPont) and 0.5 part of MA-100 carbon black powder (from Mitsubishi Co);
2.5 parts of rust inhibitive pigment comprising 0.5 part of aluminum tripolyphosphate, 1 part of zinc phosphate, 1.5 parts of nubriox-302 (available from Neofily Corp.);
3 parts of dispersant include 2.5 parts 688W (from Utility card chemical) and 0.5 parts PX4585 (from Basoff);
the rust inhibitor is a mixed rust inhibitor comprising 1.2 parts Asconium-143 and 0.3 parts Acotran H-10 (available from Ascotec corporation);
the film forming auxiliary agent is a two-component mixed film forming auxiliary agent and comprises 2 parts of propylene glycol butyl ether and 2 parts of dipropylene glycol butyl ether;
the defoamer is a mixed defoamer comprising 0.3 part BYK-028 (available from pick corporation) and 0.1 part Tego 810 (available from basf win-creation corporation);
the substrate wetting agent was 0.3 parts Tego280 (available from win-creating company);
the rheology aid is a mixed rheology aid comprising 0.1 part Bentone DE (available from hamming company) and 0.3 part RM-8W (available from dow company).
Specifically, in this example, the coating composition 2 was prepared by the following method.
The TI-PURE R-960 titanium white powder, MA-100 carbon black powder, antirust pigment, filler and bentoneDE are adopted to be sanded with deionized water and dispersing agent in advance until the fineness is below 10 mu m, so that the gray color paste is prepared.
Further, a rust inhibitor Asconium-143 is dispersed in gray color paste, then added into XK-85 styrene-acrylic emulsion under the condition of high-speed stirring, and then defoamer, substrate wetting agent, film forming aid, deionized water, rust inhibitor Acotran H-10 and rheological aid are sequentially added to prepare the uniformly mixed aqueous acrylic single-component coating composition 2.
Example 3: aqueous coating composition 3
In example 3, an aqueous one-part acrylic coating composition was prepared that included the following components. The coating composition forms a coating with good protective properties based on an aqueous acrylic one-component resin and a rust inhibitor. The water-based coating composition 3 comprises the following components in parts by weight based on 100 parts by weight: :
auxiliary agent
Wherein:
60 parts of an aqueous acrylic single component resin which is NeoCryl XK-85 aqueous styrene-acrylic emulsion (from Dissmann Corp);
5 parts of a coloring pigment comprising 4.5 parts of TI-PURE R-960 titanium pigment (from DuPont) and 0.5 part of MA-100 carbon black powder (from Mitsubishi Co);
2.5 parts of rust inhibitive pigment comprising 0.5 part of aluminum tripolyphosphate, 1 part of zinc phosphate, 1.5 parts of nubriox-302 (available from Neofily Corp.);
3 parts of dispersant include 2.5 parts 688W (from Utility card chemical) and 0.5 parts PX4585 (from Basoff);
the rust inhibitor is a mixed rust inhibitor comprising 1.2 parts Asconium-143 and 0.3 parts Acotran H-10 (available from Ascotec corporation);
the film forming auxiliary agent is a two-component mixed film forming auxiliary agent and comprises 2 parts of propylene glycol butyl ether and 2 parts of dipropylene glycol butyl ether;
the defoamer is a mixed defoamer comprising 0.3 part BYK-028 (available from pick corporation) and 0.1 part Tego 810 (available from basf win-creation corporation);
the substrate wetting agent was 0.3 parts Tego280 (available from win-creating company);
the rheology aid is a mixed rheology aid comprising 0.06 parts Bentone LT (from hmos), 0.06 parts Bentone DE (from hmos) and 0.3 parts RM-8W (from dow).
The coating composition 3 of this example was prepared by the following method:
the TI-PURE R-960 titanium white powder, MA-100 carbon black powder, antirust pigment, filler and Bentone are required to be sanded with deionized water and dispersing agent in advance until the fineness is below 10 mu m, so that gray color paste is prepared.
Further, a rust inhibitor Asconium-143 is dispersed in gray color paste, then added into XK-85 styrene-acrylic emulsion under the condition of high-speed stirring, and then the defoamer, the substrate wetting agent, the film forming auxiliary agent, deionized water, the rust inhibitor Acotran H-10 and the rheological auxiliary agent are sequentially added to prepare the uniformly mixed aqueous acrylic acid single-component coating composition 3.
Comparative example 1
A one-part acrylic coating composition C1 was prepared using a formulation and method similar to example 1, except that the rheological adjuvant Bentone LT was not added in this comparative example 1.
Comparative example 2
A one-part acrylic coating composition C2 was prepared using a formulation and method of preparation similar to that of example 1. Except that in this comparative example 2, the rheological aid Bentone LT was not added, and the substrate wetting agent was Tego-4100 (available from win company).
Comparative example 3
Acrylic one-part coating composition C3 was prepared using a formulation and method of preparation similar to that of example 1. Except that Tego-4100 (available from Yingchuang Co.) was used as the substrate wetting agent in comparative example 3.
Comparative example 4
Acrylic one-part coating composition C4 was prepared using a formulation and method of preparation similar to that of example 2. Except that Tego-4100 (available from Yingchuang Co.) was used as the substrate wetting agent in comparative example 4.
Test 1
The paints of example 1 and example 2 were diluted to a paint-4 cup viscosity of 40s, and sheared using a rheometer (Antton Parr, rotor PP50-SN 37455) at a shear rate of 500 (1/s) for 30s, giving the viscosity profile shown in FIG. 1.
As can be seen from fig. 1, example 2 using Bentone DE in the formulation has a faster viscosity recovery rate after shearing than example 1 using Bentone LT, and the rheological properties are theoretically more helpful for stacking of coating film thicknesses after dip coating under the same viscosity conditions.
Test 2
The coating compositions prepared in examples 1, 2, 3 and comparative examples 1, 2, 3, 4 were each diluted to a paint-4 cup viscosity of 40s.
Dip-coating with a sandblasted steel plate for two times at 2 minute intervals; then, leveling for 10 minutes, and baking in a 60-DEG oven for 30 minutes, and recording the film thickness and appearance.
The experiments were performed at 30 ℃ and 70% relative humidity and 30 ℃ and 25% relative humidity, respectively, to simulate the thickness and appearance of films formed by dip coating the workpieces under different environmental conditions. The test results are specifically shown in table 1.
TABLE 1 dip coating film formation of coating compositions of different examples and comparative examples under high temperature and high humidity and high temperature and low humidity environments
As shown in Table 1, the addition of different rheology auxiliaries has a large effect on the paint film stack as a result of dip coating film formation in a high temperature, high humidity environment at 30℃and 70% relative humidity. In a high-temperature and high-humidity environment, the paint film has long opening time, and the lower viscosity leads to better appearance of the paint film, but the film thickness is not suitable to be stacked. And in a high-temperature low-humidity environment with the relative humidity of 30 ℃ and 25%, the paint film opening and leveling time is shortened, the film thickness is increased, and the choice of the leveling auxiliary agent obviously influences the flatness of the final paint film. Moreover, the aqueous coating compositions of examples 1-3 of the present invention, by dip coating process, significantly increased the film thickness up to 50-70 μm while keeping the paint film flat and free from orange peel and cracks.
From comparison of fig. 2 to 8, it is clear that in the case of forming a film with a significantly improved thickness under high temperature and low humidity conditions, the choice of the leveling aid has a significant effect on the overall appearance properties of the dip-coated film. In addition, the leveling auxiliary agent selected in the embodiment 1-3 can obviously reduce appearance defects of the paint film, and obviously improve appearance indexes such as flatness, smoothness and the like of the paint film. More specifically, in examples 1-3, example 3 was a more balanced design, and the sample of example 2 was able to achieve a higher film thickness, and the viscosity after heat storage was changed more than that of example 3 and more than that of example 1, so that in practical use, the product prepared in example 3 was more stable.
The foregoing description of the preferred embodiments of the present invention is provided for the purpose of illustration only and is not intended to be limiting. Those skilled in the art should consider the technical scheme obtained by carrying out equivalent substitution, modification or combination according to the conception and spirit of the present invention.
Claims (10)
1. An antirust aqueous coating composition, characterized by comprising, in parts by weight:
50-70 parts of acrylic resin;
3-5 parts of coloring pigment;
10-15 parts of filler;
2-8 parts of antirust agent;
1-13 parts of an auxiliary agent; and
5-15 parts of deionized water.
2. The aqueous coating composition of claim 1 wherein the adjuvant comprises a rheology aid.
3. The aqueous coating composition of claim 2 wherein the rheology aid is a combination of at least one or more of an organically modified montmorillonite clay-based rheology aid and a readily dispersible hectorite clay-based rheology aid.
4. The aqueous coating composition of claim 2 wherein the rheology aid is a nonionic polyurethane associative thickener.
5. The aqueous coating composition of claim 1, wherein the rust inhibitor comprises a rust inhibitor and/or a rust inhibitive pigment.
6. The aqueous feed composition of claim 5, wherein the rust inhibitor comprises a first rust inhibitor and a second rust inhibitor, and the first rust inhibitor is the same or different than the second rust inhibitor.
7. The aqueous coating composition of claim 4, wherein the rust inhibitive pigment is a combination of at least two or more selected from the group consisting of aluminum tripolyphosphate, zinc phosphate, calcium strontium phosphosilicic acid.
8. The aqueous coating composition of claim 1, wherein the aqueous one-component acrylic resin is selected from one or more of a self-crosslinking aqueous acrylic dispersion and/or an aqueous styrene-acrylic emulsion.
9. The aqueous coating composition according to claim 1, wherein the auxiliary comprises, in parts by weight: 3 to 10 parts of film forming auxiliary agent, 2 to 5 parts of dispersing agent, 0.1 to 1 part of defoamer, 0.3 to 1 part of substrate wetting agent and 0.1 to 1 part of rheological auxiliary agent.
10. An aqueous acrylic resin coating, characterized in that it is a coating prepared from the aqueous coating composition according to any one of claims 1 to 9 by dip coating.
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| CN202210639993.1A CN117229676A (en) | 2022-06-08 | 2022-06-08 | Antirust water-based paint composition and coating |
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| CN202210639993.1A CN117229676A (en) | 2022-06-08 | 2022-06-08 | Antirust water-based paint composition and coating |
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