CN115895442B - 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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- CN115895442B CN115895442B CN202211054788.5A CN202211054788A CN115895442B CN 115895442 B CN115895442 B CN 115895442B CN 202211054788 A CN202211054788 A CN 202211054788A CN 115895442 B CN115895442 B CN 115895442B
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- 238000000576 coating method Methods 0.000 title claims abstract description 47
- 239000011248 coating agent Substances 0.000 title claims abstract description 44
- 238000005246 galvanizing Methods 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title description 12
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 44
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 150000003839 salts Chemical class 0.000 claims abstract description 39
- 239000004593 Epoxy Substances 0.000 claims abstract description 38
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 37
- 150000001412 amines Chemical class 0.000 claims abstract description 37
- 229920000570 polyether Polymers 0.000 claims abstract description 37
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 33
- 238000003756 stirring Methods 0.000 claims abstract description 31
- 239000007921 spray Substances 0.000 claims abstract description 22
- 239000003960 organic solvent Substances 0.000 claims abstract description 21
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 21
- 239000011701 zinc Substances 0.000 claims abstract description 21
- 239000004952 Polyamide Substances 0.000 claims abstract description 18
- 229920002647 polyamide Polymers 0.000 claims abstract description 18
- -1 polyethylene Polymers 0.000 claims abstract description 18
- 239000004698 Polyethylene Substances 0.000 claims abstract description 17
- 239000003595 mist Substances 0.000 claims abstract description 17
- 229920000573 polyethylene Polymers 0.000 claims abstract description 17
- 239000002318 adhesion promoter Substances 0.000 claims abstract description 16
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 15
- 239000000654 additive Substances 0.000 claims abstract description 14
- 230000000996 additive effect Effects 0.000 claims abstract description 14
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 239000006185 dispersion Substances 0.000 claims abstract description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 24
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 15
- 239000004841 bisphenol A epoxy resin Substances 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-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
- 239000001569 carbon dioxide Substances 0.000 claims description 12
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 12
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 10
- 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
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 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
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 239000008096 xylene Substances 0.000 claims description 3
- 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
- 239000004645 polyester resin Substances 0.000 claims description 2
- 229920001225 polyester resin Polymers 0.000 claims description 2
- 230000008961 swelling Effects 0.000 claims description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 3
- 239000003973 paint Substances 0.000 description 9
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229910001868 water Inorganic materials 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
- 238000010276 construction Methods 0.000 description 3
- 229910021389 graphene Inorganic materials 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 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
- 238000005260 corrosion Methods 0.000 description 2
- 239000000839 emulsion Substances 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
- 230000035515 penetration Effects 0.000 description 2
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004705 High-molecular-weight polyethylene Substances 0.000 description 1
- 229920006068 Minlon® Polymers 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000004111 Potassium silicate Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 229910052913 potassium silicate Inorganic materials 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- DCKVNWZUADLDEH-UHFFFAOYSA-N sec-butyl acetate Chemical compound CCC(C)OC(C)=O DCKVNWZUADLDEH-UHFFFAOYSA-N 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
Landscapes
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Epoxy Resins (AREA)
Abstract
The invention discloses a salt mist-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 auxiliary agent, 1-2 parts of polyamide wax anti-settling auxiliary agent, 10-15 parts of mixed organic solvent and 75-85 parts of mixed zinc powder. The method for preparing the salt-fog-resistant cold zinc coating comprises the following steps of adding polyether amine epoxy hybrid acrylic resin, an adhesion promoter, a polyethylene wax anti-settling additive, a polyamide wax anti-settling additive and a mixed organic solvent into a closed reaction kettle for uniform dispersion, adding mixed zinc powder while stirring, and filtering by a 80-mesh filter screen after uniform stirring to obtain the salt-fog-resistant cold zinc 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 mist-resistant cold zinc coating and a preparation method thereof.
Background
At present, heavy anti-corrosion coating is adopted in port engineering, railway engineering, large-scale chemical industry plants, large airports and large-scale railway stations in China, namely, international universal ISO 12944C 5-grade coating is matched, and the highest anti-corrosion grade of neutral salt spray resistance of 3000h can only be provided by the coating matching of epoxy zinc-rich and epoxy Yun Tiejia finish paint, and no higher salt spray resistance coating matching exists at present. For example, chinese patent CN106590199a discloses a water-based potassium silicate zinc-rich primer for surface treatment of steel structure with long salt spray resistance and service life and a preparation method thereof, the product adopts polyvinyl acetate emulsion and styrene-acrylic emulsion modified potassium silicate solution as film forming materials, although the tenacious property, strength and adhesive force of silicate film forming materials are improved, the penetration resistance to water, oxygen, carbon dioxide, salt water and the like is insufficient, and the salt spray resistance level can only reach within 1500 h. Chinese patent CN111777918A discloses a graphene film for improving salt spray resistance of an epoxy zinc-rich primer, and preparation and application thereof, and the product has the advantages that the shielding function of the paint is greatly improved due to the addition of graphene, the penetration of water, oxygen, carbon dioxide and the like in use is effectively prevented, the salt spray resistance can reach 12000 hours surprisingly, but the cost of the product is very high due to the fact that the price of the graphene is too high, and the product is not economical.
Disclosure of Invention
The invention aims to provide a salt mist resistant cold zinc coating and a preparation method thereof, which solve one or more of the problems in the prior art.
On one hand, the salt mist resistant cold galvanizing coating provided by the invention 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 auxiliary agent;
1-2 parts of polyamide wax anti-settling auxiliary agent;
10-15 parts of mixed organic solvent;
75-85 parts of mixed zinc powder.
In certain embodiments, the polyetheramine epoxy hybrid acrylic resin is prepared by the steps of:
s1, reacting bisphenol A epoxy resin E20 and mono-functionality polyether amine in a closed reaction kettle for 3-4 hours according to a molecular molar ratio of 2:1 at 80 ℃;
s2, continuously adding the high molecular weight polyacrylic resin, and reacting for 1h to obtain the polyether amine epoxy hybrid acrylic resin.
Wherein: the polyether amine epoxy hybrid acrylic resin has good adhesion to a metal substrate.
In certain embodiments, the polyetheramine epoxy hybrid acrylic resin is prepared by the steps of:
s1, putting bisphenol A epoxy resin E20 and mono-functionality polyether amine into a closed reaction kettle which can be heated and flushed with inert gas according to a molecular molar ratio of 2:1, heating to 80 ℃ under the protection of nitrogen or carbon dioxide gas by using dimethylbenzene as a solvent, and stirring and reacting for 3-4 hours;
s2, adding the large molecular weight polyacrylic resin equivalent 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.
In certain embodiments, the monofunctional polyetheramine is a Hensman M-2005 polyetheramine.
In certain embodiments, the bisphenol a epoxy resin, polyetheramine, and xylene are present in a weight ratio of 1:1:2.
wherein: the weight ratio is controlled to improve the reaction degree of amine groups in polyether amine and epoxy groups in epoxy resin, so that more hydroxyl groups are generated as much as possible, the molecular weight of the resin is improved, and the fog resistance is improved, so that the modification can be successful.
In certain embodiments, the high molecular weight polyacrylic resin is ZJ-410 of the Jiaxiang chemical industry, suzhou.
In certain embodiments, the adhesion promoter is a polyhydroxy polyester resin.
In certain embodiments, the adhesion promoter is one of LTW from dygae, germany or LTW from hamming-si-d.
In certain embodiments, the polyethylene wax anti-settling aid, hamming-modified polyethylene wax slurry 201P, is a low polarity high molecular weight polyethylene wax slurry produced by Hamming.
In some embodiments, the polyamide wax anti-settling auxiliary agent is a paste or paste in which swelling particles with a molecular structure of polyamide are suspended in an organic solvent, wherein the organic solvent is 1-3 of toluene, xylene, trimethylbenzene, butanol, acetone and butyl ester.
In certain embodiments, the particles have a fineness of 0 to 20 μm after high speed dispersion.
In certain embodiments, the polyamide wax anti-settling aid is one of 3300s produced by Korea Minlon or 6900-20X of Di Sibaron, japan.
In some embodiments, the mixed organic solvent is formed by mixing 2-3 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 prepared from a spherical zinc powder and a flaky zinc powder according to 9: (7-9) and mixing the components.
In another aspect, the invention provides a method for preparing a salt spray resistant cold zinc coating, comprising the following steps:
a1, weighing the corresponding raw materials in parts by weight;
and A2, 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 at the linear speed of 20-40m/s, adding mixed zinc powder while stirring, and filtering by using a 80-mesh filter screen after uniformly stirring to obtain the salt mist-resistant cold zinc coating.
Wherein: the salt mist-resistant cold galvanizing coating 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 auxiliary agent;
1-2 parts of polyamide wax anti-settling auxiliary agent;
10-15 parts of mixed organic solvent;
75-85 parts of mixed zinc powder.
In certain embodiments, the time of agitation and dispersion after addition of the blended zinc powder is from 30 to 60 minutes.
In certain embodiments, the salt spray resistant cold zinc coating of the present invention also requires the addition of a certain amount of organic solvent according to the process requirements of the spray equipment construction at the time of use, and must be sprayed while stirring.
The beneficial effects are that: the cold zinc plating coating with salt spray resistance adopts polyether amine epoxy hybrid acrylic resin as a film forming material, has higher molecular weight and higher strength, has good adhesive force to metal substrates, has less resin in a paint film, has the mass fraction of zinc powder in a dry film reaching more than 95 percent, can be matched with various coatings such as epoxy, acrylic and the like, fully plays the cathode protection function of the zinc powder, has improved salt spray resistance to more than 10000 hours, is a good economic heavy-duty coating, and has not been reported in the prior economic oil coating with salt spray resistance reaching more than 10000 hours.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
Example 1
The salt mist 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 mono-functionality polyether amine into a closed reaction kettle which can be heated and flushed with inert gas according to a molecular molar ratio of 2:1, and heating to 80 ℃ under the protection of nitrogen or carbon dioxide gas by using dimethylbenzene as a solvent to perform stirring reaction for 3 hours;
s2, adding the high molecular weight polyacrylic resin equivalent 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 the corresponding raw materials in parts by weight;
3. and (3) putting polyether amine epoxy hybrid acrylic resin, an adhesion promoter, a polyethylene wax anti-settling additive, a polyamide wax anti-settling additive and a mixed organic solvent into a closed reaction kettle, uniformly dispersing at a linear speed of 30m/s, adding mixed zinc powder while stirring, and filtering by a 80-mesh filter screen after uniformly stirring to obtain the salt mist-resistant cold zinc coating.
Example 2
The salt mist 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 mono-functionality polyether amine into a closed reaction kettle which can be heated and flushed with inert gas according to a molecular molar ratio of 2:1, and heating to 80 ℃ under the protection of nitrogen or carbon dioxide gas by using dimethylbenzene as a solvent to perform stirring reaction for 3.5h;
s2, adding the high molecular weight polyacrylic resin equivalent 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 the corresponding raw materials in parts by weight;
3. and (3) putting polyether amine epoxy hybrid acrylic resin, an adhesion promoter, a polyethylene wax anti-settling additive, a polyamide wax anti-settling additive and a mixed organic solvent into a closed reaction kettle, uniformly dispersing at a linear speed of 20m/s, adding mixed zinc powder while stirring, and filtering by a 80-mesh filter screen after uniformly stirring to obtain the salt mist-resistant cold zinc coating.
Example 3
The salt mist 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 mono-functionality polyether amine into a closed reaction kettle which can be heated and flushed with inert gas according to a molecular molar ratio of 2:1, and heating to 80 ℃ under the protection of nitrogen or carbon dioxide gas by using dimethylbenzene as a solvent to perform stirring reaction for 3.8 hours;
s2, adding the high molecular weight polyacrylic resin equivalent 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 the corresponding raw materials in parts by weight;
3. and (3) putting polyether amine epoxy hybrid acrylic resin, an adhesion promoter, a polyethylene wax anti-settling additive, a polyamide wax anti-settling additive and a mixed organic solvent into a closed reaction kettle, uniformly dispersing at a linear speed of 40m/s, adding mixed zinc powder while stirring, and filtering by a 80-mesh filter screen after uniformly stirring to obtain the salt mist-resistant cold zinc coating.
Example 4
The salt mist 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 mono-functionality polyether amine into a closed reaction kettle which can be heated and flushed with inert gas according to a molecular molar ratio of 2:1, and heating to 80 ℃ under the protection of nitrogen or carbon dioxide gas by using dimethylbenzene as a solvent to perform stirring reaction for 4 hours;
s2, adding the high molecular weight polyacrylic resin equivalent 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 the corresponding raw materials in parts by weight;
3. and (3) putting polyether amine epoxy hybrid acrylic resin, an adhesion promoter, a polyethylene wax anti-settling additive, a polyamide wax anti-settling additive and a mixed organic solvent into a closed reaction kettle, uniformly dispersing at a linear speed of 30m/s, adding mixed zinc powder while stirring, and filtering by a 80-mesh filter screen after uniformly stirring to obtain the salt mist-resistant cold zinc coating.
Comparative example 1
Based on the formulation of example 1, the polyether amine epoxy hybrid acrylic resin is changed into polyacrylic resin, and other parameters are the same as those of example 1, specifically:
the coating comprises the following components in parts by weight:
the preparation method comprises the following steps:
1. weighing the corresponding raw materials in parts by weight;
2. and (3) adding the polyacrylic 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 at a linear speed of 30m/s, adding mixed zinc powder while stirring, and filtering by using a 80-mesh filter screen after uniformly stirring to obtain the coating.
Comparative example 2
Based on the formula of the example 1, the polyether amine epoxy hybrid acrylic resin is changed into a single-component epoxy modified acrylic resin, and other parameters are the same as the example 1, specifically:
the coating comprises the following components in parts by weight:
the preparation method comprises the following steps:
1. weighing the corresponding raw materials in parts by weight;
2. and (3) 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 at a linear speed of 30m/s, adding the mixed zinc powder while stirring, and filtering by a 80-mesh filter screen after uniformly stirring to obtain the coating.
Performance testing
The coatings prepared in examples 1 to 4 and comparative examples 1 to 2 were diluted with the same mixed organic solvent and then sprayed on a standard substrate, and after being dried in an environment with constant temperature and humidity (23 ℃ C., 50%) for 48 hours, the corresponding adjustment time was selected according to the technical index, and each technical index was measured and shown in Table 1.
TABLE 1
To sum up: the salt mist resistant cold galvanizing coating provided by the invention has the following advantages:
(1) The paint film of the invention has excellent mechanical property and construction property;
(2) The coating disclosed by the invention has excellent salt spray resistance, and the salt spray resistance can reach more than 10000+;
(3) The paint of the invention can be matched with various finishing paints, such as a double-component epoxy paint, a double-component polyurethane paint, a single-component acrylic finishing paint and the like.
The above description is only of a preferred form of the invention, it being noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the inventive concept, which shall also be regarded as being within the scope of the invention.
Claims (9)
1. The salt mist resistant cold galvanizing coating is characterized by comprising 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 auxiliary agent;
1-2 parts of polyamide wax anti-settling auxiliary agent;
10-15 parts of mixed organic solvent;
75-85 parts of mixed zinc powder;
wherein: the polyether amine epoxy hybrid acrylic resin is prepared by the following steps:
s1, reacting bisphenol A epoxy resin E20 and mono-functionality polyether amine in a closed reaction kettle for 3-4 hours according to a molecular molar ratio of 2:1 at 80 ℃;
s2, continuously adding the high molecular weight polyacrylic resin, and reacting for 1h to obtain the polyether amine epoxy hybrid acrylic resin.
2. The salt spray resistant cold galvanizing coating of claim 1, wherein the polyetheramine epoxy hybrid acrylic resin is prepared by the steps of:
s1, putting bisphenol A epoxy resin E20 and mono-functionality polyether amine into a closed reaction kettle which can be heated and flushed with inert gas according to a molecular molar ratio of 2:1, heating to 80 ℃ under the protection of nitrogen or carbon dioxide gas by using dimethylbenzene as a solvent, and stirring and reacting for 3-4 hours;
s2, adding the large molecular weight polyacrylic resin equivalent 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.
3. A cold zinc coating according to claim 1, wherein the adhesion promoter is a polyhydroxy polyester resin.
4. The salt spray resistant cold galvanizing coating according to claim 1, wherein the polyethylene wax anti-settling additive, namely polyethylene wax slurry 201P with low polarity and high molecular weight produced by hammock company.
5. The salt spray resistant cold galvanizing coating according to claim 1, wherein the polyamide wax anti-settling additive is a paste or paste of an organic solvent in which swelling particles of polyamide with a molecular structure are suspended, and the organic solvent is 1-3 of toluene, xylene, trimethylbenzene, butanol, acetone and butyl acetate.
6. The salt spray resistant cold zinc coating according to claim 5, wherein the particles have a fineness of 0 to 20 μm after high-speed dispersion.
7. The salt spray resistant cold zinc coating according to claim 1, wherein the mixed organic solvent is formed by mixing 2-3 of toluene, trimethylbenzene, isopropanol, n-butanol, methyl acetate, butyl acetate and ethyl acetate.
8. A cold zinc coating material resistant to salt spray according to claim 1, wherein said blended zinc powder is prepared from a spherical zinc powder and a flaky zinc powder according to 9: (7-9) and mixing the components.
9. A process for preparing a salt spray resistant cold zinc coating material according to any one of claims 1 to 8, comprising the steps of:
a1, weighing the corresponding raw materials in parts by weight;
and A2, 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 at the linear speed of 20-40m/s, adding mixed zinc powder while stirring, and filtering by using a 80-mesh filter screen after uniformly stirring to obtain the salt mist-resistant cold zinc coating.
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| CN115895442B true CN115895442B (en) | 2023-09-12 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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