CN115895442A - Salt-fog-resistant cold galvanizing coating and preparation method thereof - Google Patents
Salt-fog-resistant cold galvanizing coating and preparation method thereof Download PDFInfo
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- CN115895442A CN115895442A CN202211054788.5A CN202211054788A CN115895442A CN 115895442 A CN115895442 A CN 115895442A CN 202211054788 A CN202211054788 A CN 202211054788A CN 115895442 A CN115895442 A CN 115895442A
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- salt spray
- resistant cold
- polyether amine
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- galvanizing coating
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- 238000000576 coating method Methods 0.000 title claims abstract description 54
- 239000011248 coating agent Substances 0.000 title claims abstract description 49
- 238000005246 galvanizing Methods 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title description 12
- 150000003839 salts Chemical class 0.000 claims abstract description 42
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 41
- 239000007921 spray Substances 0.000 claims abstract description 39
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 35
- 150000001412 amines Chemical class 0.000 claims abstract description 35
- 229920000570 polyether Polymers 0.000 claims abstract description 35
- 239000004593 Epoxy Substances 0.000 claims abstract description 33
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 30
- 238000003756 stirring Methods 0.000 claims abstract description 26
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000000654 additive Substances 0.000 claims abstract description 19
- 230000000996 additive effect Effects 0.000 claims abstract description 19
- 239000003960 organic solvent Substances 0.000 claims abstract description 18
- 239000004952 Polyamide Substances 0.000 claims abstract description 15
- 229920002647 polyamide Polymers 0.000 claims abstract description 15
- 239000002318 adhesion promoter Substances 0.000 claims abstract description 13
- -1 polyethylene Polymers 0.000 claims abstract description 13
- 239000004698 Polyethylene Substances 0.000 claims abstract description 12
- 229920000573 polyethylene Polymers 0.000 claims abstract description 12
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 4
- 239000004841 bisphenol A epoxy resin Substances 0.000 claims description 15
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 12
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 12
- FYGHSUNMUKGBRK-UHFFFAOYSA-N 1,2,3-trimethylbenzene Chemical compound CC1=CC=CC(C)=C1C FYGHSUNMUKGBRK-UHFFFAOYSA-N 0.000 claims description 8
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000001569 carbon dioxide Substances 0.000 claims description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 6
- 238000011010 flushing procedure Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims description 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 3
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 3
- 239000008096 xylene Substances 0.000 claims description 3
- 239000004705 High-molecular-weight polyethylene Substances 0.000 claims description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims description 2
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 claims description 2
- NUKZAGXMHTUAFE-UHFFFAOYSA-N hexanoic acid methyl ester Natural products CCCCCC(=O)OC NUKZAGXMHTUAFE-UHFFFAOYSA-N 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000004645 polyester resin Substances 0.000 claims description 2
- 229920001225 polyester resin Polymers 0.000 claims description 2
- 239000002002 slurry Substances 0.000 claims description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims 1
- 239000006185 dispersion Substances 0.000 claims 1
- 239000012752 auxiliary agent Substances 0.000 abstract 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229910021389 graphene Inorganic materials 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 229920006334 epoxy coating Polymers 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001868 water Inorganic materials 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
- 241000196324 Embryophyta Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241000544076 Whipplea modesta Species 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- YWXYYJSYQOXTPL-SLPGGIOYSA-N isosorbide mononitrate Chemical compound [O-][N+](=O)O[C@@H]1CO[C@@H]2[C@@H](O)CO[C@@H]21 YWXYYJSYQOXTPL-SLPGGIOYSA-N 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000011527 polyurethane coating Substances 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical class [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- DCKVNWZUADLDEH-UHFFFAOYSA-N sec-butyl acetate Chemical compound CCC(C)OC(C)=O DCKVNWZUADLDEH-UHFFFAOYSA-N 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920001909 styrene-acrylic polymer Polymers 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 235000013529 tequila Nutrition 0.000 description 1
- RLQWHDODQVOVKU-UHFFFAOYSA-N tetrapotassium;silicate Chemical compound [K+].[K+].[K+].[K+].[O-][Si]([O-])([O-])[O-] RLQWHDODQVOVKU-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Epoxy Resins (AREA)
Abstract
The invention discloses a salt spray resistant cold galvanizing coating which comprises the following components in parts by weight: 4-6 parts of polyether amine epoxy hybrid acrylic resin, 0.03-0.06 part of adhesion promoter, 1-2 parts of polyethylene wax anti-settling additive, 1-2 parts of polyamide wax anti-settling additive, 10-15 parts of mixed organic solvent and 75-85 parts of mixed zinc powder. And the method for preparing the salt spray resistant cold galvanizing coating comprises the following steps of putting the polyether amine epoxy hybrid acrylic resin, the adhesion promoter, the polyethylene wax anti-settling auxiliary agent, the polyamide wax anti-settling auxiliary agent and the mixed organic solvent into a closed reaction kettle, uniformly dispersing, adding the mixed zinc powder while stirring, uniformly stirring, and filtering by using a 80-mesh filter screen to obtain the salt spray resistant cold galvanizing coating. The coating has good mechanical property, durability and salt spray resistance.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a salt spray resistant cold galvanizing coating and a preparation method thereof.
Background
At present, port engineering, railway engineering, large-scale chemical plants, large-scale airports and large-scale railway stations in China all adopt heavy-duty anticorrosive coating, namely international universal coating matching with ISO 12944C 5 grade, and coating matching of epoxy zinc-rich, epoxy mica iron and finish paint can only provide an anticorrosive grade of resisting neutral salt fog for 3000h at most, and at present, no coating matching with higher salt fog resistance exists. For example, chinese patent CN106590199A discloses an aqueous potassium silicate zinc-rich primer with long salt spray resistance service life for surface treatment of a steel structure and a preparation method thereof, the product adopts a polyvinyl acetate emulsion and a styrene-acrylic emulsion modified potassium silicate solution as film forming materials, and although the toughness, strength adhesion and the like of the film forming materials of the silicate are improved, the penetration resistance of the film forming materials of the silicate on water, oxygen, carbon dioxide, brine and the like is not enough, and the salt spray resistance level can only reach within 1500 h. Chinese patent CN111777918A discloses a graphene film for improving the salt spray resistance of an epoxy zinc-rich primer, and preparation and application thereof, wherein the addition of graphene greatly improves the shielding function of a coating, effectively prevents water, oxygen, carbon dioxide and the like from permeating in use, and can achieve the salt spray resistance of 12000h, but the product cost is very high due to the high price of graphene, so that the product is not economic.
Disclosure of Invention
The invention aims to provide a salt-fog-resistant cold galvanizing coating and a preparation method thereof, which solve one or more of the problems in the prior art.
On one hand, the salt spray resistant cold galvanizing coating provided by the invention comprises the following components in parts by weight:
in certain embodiments, the polyetheramine epoxy hybrid acrylic resin is prepared by the steps of:
s1, reacting bisphenol A epoxy resin E20 and monofunctional polyether amine in a closed reaction kettle for 3-4 hours at 80 ℃;
and S2, continuously adding the high molecular weight polyacrylic resin, and reacting for 1 hour to obtain the polyether amine epoxy hybrid acrylic resin.
Wherein: the polyether amine epoxy hybrid acrylic resin has good adhesion to metal substrates.
In certain embodiments, the polyetheramine epoxy hybrid acrylic resin is prepared by the steps of:
s1, putting bisphenol A epoxy resin E20 and monofunctional polyether amine into a closed reaction kettle capable of heating and flushing inert gas according to a molecular molar ratio of 2;
s2, adding the high molecular weight polyacrylic resin with the same quantity as the bisphenol A epoxy resin, and continuously stirring and mixing for 1h at the temperature of 80 ℃ under the protection of nitrogen or carbon dioxide gas to obtain the polyether amine epoxy hybrid acrylic resin.
In certain embodiments, the monofunctional polyetheramine is Henschel M-2005 polyetheramine.
In certain embodiments, the weight ratio of bisphenol a epoxy resin, polyetheramine, and xylene is 1:1:2.
wherein: the weight ratio is controlled to be the weight ratio, so that the reaction degree of amino in the polyether amine and epoxy groups in the epoxy resin can be improved, more hydroxyl groups can be generated as much as possible, the molecular weight of the resin is improved, and the fog salt resistance is improved, so that the modification can be successful.
In certain embodiments, the high molecular weight polyacrylic resin is ZJ-410 from Jiaxiang chemical, suzhou.
In certain embodiments, the adhesion promoter is a polyhydroxy polyester resin.
In certain embodiments, the adhesion promoter is one of LTW of dygao, germany or LTW of hammes tequila.
In certain embodiments, the polyethylene wax anti-settling aid hamming siemens modesty produces a low polarity, high molecular weight polyethylene wax slurry 201P.
In some embodiments, the polyamide wax anti-settling additive is a paste or paste having a molecular structure of expanded particles of polyamide suspended in an organic solvent, wherein the organic solvent is 1 to 3 of toluene, xylene, trimethylbenzene, butanol, acetone, and butyl ester.
In certain embodiments, the particles are dispersed at high speed to a fineness of 0 to 20 μm.
In some embodiments, the polyamide wax anti-settling aid is one of 3300s available from Monolong, korea, or 6900-20X available from Dissbarone, japan.
In some embodiments, the mixed organic solvent is a mixture of 2 to 3 of toluene, trimethylbenzene, isopropanol, n-butanol, methyl acetate, butyl acetate and ethyl acetate, so as to adapt to different construction temperatures.
In certain embodiments, the blended zinc powder is made from a spherical zinc powder and a flake zinc powder in a ratio of 9: (7-9) in a certain proportion.
In another aspect, the present invention provides a method for preparing a salt spray resistant cold-dip galvanizing coating, comprising the steps of:
a1, weighing raw materials in corresponding parts by weight;
and A2, putting the polyether amine epoxy hybrid acrylic resin, the adhesion promoter, the polyethylene wax anti-settling additive, the polyamide wax anti-settling additive and the mixed organic solvent into a closed reaction kettle, uniformly dispersing according to the linear speed of 20-40m/s, adding the mixed zinc powder while stirring, uniformly stirring, and filtering by using a 80-mesh filter screen to obtain the salt spray resistant cold galvanizing coating.
Wherein: the salt spray resistant cold galvanizing coating comprises the following components in parts by weight:
in some embodiments, the time for stirring and dispersing after adding the mixed zinc powder is 30 to 60min.
In some embodiments, the salt spray resistant cold-dip galvanized coating of the invention also needs to be added with a certain amount of organic solvent according to the construction process requirements of the spraying equipment when in use, and the spraying construction must be carried out while stirring.
Has the advantages that: the cold galvanizing coating resistant to salt spray adopts polyether amine epoxy hybrid acrylic resin as a film forming material, the resin has higher molecular weight and higher strength, the adhesion to a metal substrate is good, the resin in a paint film is less, the mass part of zinc powder in the dry film reaches more than 95%, the cold galvanizing coating can be matched with various coatings such as epoxy coatings and acrylic acid coatings, the zinc powder cathode protection function is fully exerted, the salt spray resistance is improved to more than 10000h, the cold galvanizing coating resistant to salt spray is a good economic heavy anti-corrosion coating, and the current economic oily coating resistant to salt spray for more than 10000h is not reported.
Detailed Description
The present invention will be described in further detail below with reference to embodiments.
Example 1
The salt spray resistant cold galvanizing coating comprises the following components in parts by weight:
the preparation method comprises the following steps:
1. preparing polyether amine epoxy hybrid acrylic resin:
s1, putting bisphenol A epoxy resin E20 and monofunctional polyether amine into a closed reaction kettle capable of heating and flushing inert gas according to a molecular molar ratio of 2;
s2, adding high molecular weight polyacrylic resin which is equal to the bisphenol A epoxy resin, and continuously stirring and mixing for 1h at 80 ℃ under the protection of nitrogen or carbon dioxide gas to obtain the polyether amine epoxy hybrid acrylic resin;
2. weighing raw materials in corresponding parts by weight;
3. and (2) putting the polyether amine epoxy hybrid acrylic resin, the adhesion promoter, the polyethylene wax anti-settling additive, the polyamide wax anti-settling additive and the mixed organic solvent into a closed reaction kettle, uniformly dispersing according to the linear speed of 30m/s, adding the mixed zinc powder while stirring, uniformly stirring, and filtering by using a 80-mesh filter screen to obtain the salt spray resistant cold galvanizing coating.
Example 2
The salt spray resistant cold galvanizing coating comprises the following components in parts by weight:
the preparation method comprises the following steps:
1. preparing polyether amine epoxy hybrid acrylic resin:
s1, putting bisphenol A epoxy resin E20 and monofunctional polyether amine into a closed reaction kettle capable of heating and flushing inert gas according to a molecular molar ratio of 2;
s2, adding high molecular weight polyacrylic resin which is equal to the bisphenol A epoxy resin, and continuously stirring and mixing for 1h at 80 ℃ under the protection of nitrogen or carbon dioxide gas to obtain the polyether amine epoxy hybrid acrylic resin;
2. weighing raw materials in corresponding parts by weight;
3. and (2) putting the polyether amine epoxy hybrid acrylic resin, the adhesion promoter, the polyethylene wax anti-settling additive, the polyamide wax anti-settling additive and the mixed organic solvent into a closed reaction kettle, uniformly dispersing at a linear speed of 20m/s, adding the mixed zinc powder while stirring, and filtering with a 80-mesh filter screen after uniformly stirring to obtain the salt-fog-resistant cold-plating zinc coating.
Example 3
The salt spray resistant cold galvanizing coating comprises the following components in parts by weight:
the preparation method comprises the following steps:
1. preparing polyether amine epoxy hybrid acrylic resin:
s1, putting bisphenol A epoxy resin E20 and monofunctional polyether amine into a closed reaction kettle capable of heating and flushing inert gas according to a molecular molar ratio of 2;
s2, adding a high molecular weight polyacrylic resin with the same amount as the bisphenol A epoxy resin, and continuously stirring and mixing for 1h at the temperature of 80 ℃ under the protection of nitrogen or carbon dioxide gas to obtain the polyether amine epoxy hybrid acrylic resin;
2. weighing raw materials in corresponding parts by weight;
3. and (2) putting the polyether amine epoxy hybrid acrylic resin, the adhesion promoter, the polyethylene wax anti-settling additive, the polyamide wax anti-settling additive and the mixed organic solvent into a closed reaction kettle, uniformly dispersing at a linear speed of 40m/s, adding the mixed zinc powder while stirring, and filtering with a 80-mesh filter screen after uniformly stirring to obtain the salt spray resistant cold galvanizing coating.
Example 4
The salt spray resistant cold galvanizing coating comprises the following components in parts by weight:
the preparation method comprises the following steps:
1. preparing polyether amine epoxy hybrid acrylic resin:
s1, putting bisphenol A epoxy resin E20 and monofunctional polyether amine into a closed reaction kettle capable of heating and flushing inert gas according to a molecular molar ratio of 2;
s2, adding high molecular weight polyacrylic resin which is equal to the bisphenol A epoxy resin, and continuously stirring and mixing for 1h at 80 ℃ under the protection of nitrogen or carbon dioxide gas to obtain the polyether amine epoxy hybrid acrylic resin;
2. weighing raw materials in corresponding parts by weight;
3. and (2) putting the polyether amine epoxy hybrid acrylic resin, the adhesion promoter, the polyethylene wax anti-settling additive, the polyamide wax anti-settling additive and the mixed organic solvent into a closed reaction kettle, uniformly dispersing according to the linear speed of 30m/s, adding the mixed zinc powder while stirring, uniformly stirring, and filtering by using a 80-mesh filter screen to obtain the salt spray resistant cold galvanizing coating.
Comparative example 1
On the basis of the formula of the embodiment 1, the polyether amine epoxy hybrid acrylic resin is changed into polyacrylic resin, and other parameters are consistent with those of the embodiment 1, and specifically comprise the following steps:
a coating comprises the following components by weight:
the preparation method comprises the following steps:
1. weighing raw materials in corresponding parts by weight;
2. and (2) putting the polyacrylic resin, the adhesion promoter, the polyethylene wax anti-settling additive, the polyamide wax anti-settling additive and the mixed organic solvent into a closed reaction kettle, uniformly dispersing at a linear speed of 30m/s, adding the mixed zinc powder while stirring, uniformly stirring, and filtering by using a 80-mesh filter screen to obtain the coating.
Comparative example 2
On the basis of the formula of the embodiment 1, the polyether amine epoxy hybrid acrylic resin is changed into a single-component epoxy modified acrylic resin, and other parameters are consistent with those of the embodiment 1, and specifically include:
a coating comprises the following components by weight:
the preparation method comprises the following steps:
1. weighing raw materials in corresponding parts by weight;
2. putting the single-component epoxy modified acrylic resin, the adhesion promoter, the polyethylene wax anti-settling additive, the polyamide wax anti-settling additive and the mixed organic solvent into a closed reaction kettle, uniformly dispersing according to the linear speed of 30m/s, adding the mixed zinc powder while stirring, uniformly stirring, and filtering by using a 80-mesh filter screen to obtain the coating.
Performance testing
The coatings prepared in the examples 1-4 and the comparative examples 1-2 are diluted by the same mixed organic solvent and sprayed on a substrate specified by a standard, the coatings are aired for 48 hours in an environment with constant temperature and humidity (23 ℃, 50 percent), corresponding adjusting time is selected according to technical indexes, and the measured technical indexes are shown in the table 1.
TABLE 1
In summary, the following steps: the salt spray resistant cold galvanizing coating has the following advantages:
(1) The paint film of the paint has excellent mechanical property and construction performance;
(2) The coating has excellent salt spray resistance, and the salt spray resistance can reach more than 10000 +;
(3) The coating can be matched with various finishes, such as a two-component epoxy coating, a two-component polyurethane coating, a single-component acrylic finish and the like.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these should be considered as within the scope of the present invention.
Claims (10)
1. The salt spray resistant cold galvanizing coating is characterized by comprising the following components in parts by weight:
2. the salt spray resistant cold galvanizing coating as claimed in claim 1, wherein the polyether amine epoxy hybrid acrylic resin is prepared by the following steps:
s1, reacting bisphenol A epoxy resin E20 and monofunctional polyether amine in a closed reaction kettle for 3-4 hours at 80 ℃;
and S2, continuously adding high molecular weight polyacrylic resin, and reacting for 1h to obtain the polyether amine epoxy hybrid acrylic resin.
3. The salt spray resistant cold galvanizing coating of claim 2, wherein the polyether amine epoxy hybrid acrylic resin is prepared by the following steps:
s1, putting bisphenol A epoxy resin E20 and monofunctional polyether amine into a closed reaction kettle capable of heating and flushing inert gas according to a molecular molar ratio of 2;
s2, adding the high molecular weight polyacrylic resin with the same quantity as the bisphenol A epoxy resin, and continuously stirring and mixing for 1h at the temperature of 80 ℃ under the protection of nitrogen or carbon dioxide gas to obtain the polyether amine epoxy hybrid acrylic resin.
4. The salt spray resistant cold-dip galvanized coating of claim 1, wherein the adhesion promoter is a polyhydroxy polyester resin.
5. The salt spray-resistant cold-dip galvanizing coating according to claim 1, wherein the polyethylene wax anti-settling aid hamming sied modest corporation's low-polarity high-molecular-weight polyethylene wax slurry 201P.
6. The salt spray-resistant cold-dip galvanizing coating according to claim 1, wherein the polyamide wax anti-settling auxiliary is a paste or paste in which expanded particles having a molecular structure of polyamide are suspended in an organic solvent, and the organic solvent is 1 to 3 of toluene, xylene, trimethylbenzene, butanol, acetone, and butyl acetate.
7. The salt spray-resistant cold-dip galvanizing coating according to claim 6, wherein the fineness of the particles after high-speed dispersion is 0 to 20 μm.
8. The salt spray resistant cold-dip galvanized coating as claimed in claim 1, characterized in that the mixed organic solvent is a mixture of 2 to 3 of toluene, trimethylbenzene, isopropanol, n-butanol, methyl acetate, butyl acetate and ethyl acetate.
9. The salt spray-resistant cold-dip galvanizing coating of claim 1, wherein the blended zinc powder is prepared from a spherical zinc powder and a flake zinc powder in a ratio of 9: (7-9) in a certain proportion.
10. A method for preparing a salt spray resistant cold-dip galvanising coating as claimed in any one of claims 1 to 9, comprising the steps of:
a1, weighing raw materials in corresponding parts by weight;
and A2, putting the polyether amine epoxy hybrid acrylic resin, the adhesion promoter, the polyethylene wax anti-settling additive, the polyamide wax anti-settling additive and the mixed organic solvent into a closed reaction kettle, uniformly dispersing according to the linear speed of 20-40m/s, adding the mixed zinc powder while stirring, uniformly stirring, and filtering by using a 80-mesh filter screen to obtain the salt spray resistant cold galvanizing coating.
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| CN115895442B CN115895442B (en) | 2023-09-12 |
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| CN104710850A (en) * | 2015-03-18 | 2015-06-17 | 国家电网公司 | Cold galvanizing coating and preparation method thereof |
| WO2020161538A1 (en) * | 2019-02-04 | 2020-08-13 | Aditya Birla Chemicals (Thailand) Ltd. (Epoxy Division) | Recyclable and reworkable epoxy resins |
| CN111961211A (en) * | 2020-08-31 | 2020-11-20 | 南昌航空大学 | Branched chain reaction type emulsifier for epoxy resin and preparation method thereof |
| WO2021237556A1 (en) * | 2020-05-28 | 2021-12-02 | 江苏扬农锦湖化工有限公司 | Waterborne epoxy floor paint and preparation method therefor |
| CN114686069A (en) * | 2020-12-28 | 2022-07-01 | 中海油常州涂料化工研究院有限公司 | Polyacrylate resin modified waterborne epoxy emulsion and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104710850A (en) * | 2015-03-18 | 2015-06-17 | 国家电网公司 | Cold galvanizing coating and preparation method thereof |
| WO2020161538A1 (en) * | 2019-02-04 | 2020-08-13 | Aditya Birla Chemicals (Thailand) Ltd. (Epoxy Division) | Recyclable and reworkable epoxy resins |
| WO2021237556A1 (en) * | 2020-05-28 | 2021-12-02 | 江苏扬农锦湖化工有限公司 | Waterborne epoxy floor paint and preparation method therefor |
| CN111961211A (en) * | 2020-08-31 | 2020-11-20 | 南昌航空大学 | Branched chain reaction type emulsifier for epoxy resin and preparation method thereof |
| CN114686069A (en) * | 2020-12-28 | 2022-07-01 | 中海油常州涂料化工研究院有限公司 | Polyacrylate resin modified waterborne epoxy emulsion and preparation method thereof |
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Application publication date: 20230404 Assignee: Singularity Chemical Technology (Jiangsu) Co.,Ltd. Assignor: HLS COATING (SHANGHAI) Co.,Ltd. Contract record no.: X2024980012536 Denomination of invention: A salt spray resistant cold galvanized coating and its preparation method Granted publication date: 20230912 License type: Common License Record date: 20240820 |