CN117186755A - Nano modified single-component high-strength elastic protective coating and preparation method and application thereof - Google Patents
Nano modified single-component high-strength elastic protective coating and preparation method and application thereof Download PDFInfo
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- CN117186755A CN117186755A CN202311047906.4A CN202311047906A CN117186755A CN 117186755 A CN117186755 A CN 117186755A CN 202311047906 A CN202311047906 A CN 202311047906A CN 117186755 A CN117186755 A CN 117186755A
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- 239000011253 protective coating Substances 0.000 title claims abstract description 51
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 51
- 229920000570 polyether Polymers 0.000 claims description 51
- 239000000945 filler Substances 0.000 claims description 40
- 239000003795 chemical substances by application Substances 0.000 claims description 26
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 22
- 239000004970 Chain extender Substances 0.000 claims description 21
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical group CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 21
- 238000001816 cooling Methods 0.000 claims description 21
- 125000005442 diisocyanate group Chemical group 0.000 claims description 21
- 239000003085 diluting agent Substances 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 21
- 239000000049 pigment Substances 0.000 claims description 21
- 229920005862 polyol Polymers 0.000 claims description 21
- 150000003077 polyols Chemical class 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 16
- 150000001412 amines Chemical class 0.000 claims description 14
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical group OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 230000018044 dehydration Effects 0.000 claims description 14
- 238000006297 dehydration reaction Methods 0.000 claims description 14
- 229920005610 lignin Polymers 0.000 claims description 12
- 239000011787 zinc oxide Substances 0.000 claims description 11
- 229910000166 zirconium phosphate Inorganic materials 0.000 claims description 11
- 239000012802 nanoclay Substances 0.000 claims description 10
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 9
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims description 8
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- CGLVZFOCZLHKOH-UHFFFAOYSA-N 8,18-dichloro-5,15-diethyl-5,15-dihydrodiindolo(3,2-b:3',2'-m)triphenodioxazine Chemical compound CCN1C2=CC=CC=C2C2=C1C=C1OC3=C(Cl)C4=NC(C=C5C6=CC=CC=C6N(C5=C5)CC)=C5OC4=C(Cl)C3=NC1=C2 CGLVZFOCZLHKOH-UHFFFAOYSA-N 0.000 claims description 7
- QFFVPLLCYGOFPU-UHFFFAOYSA-N barium chromate Chemical compound [Ba+2].[O-][Cr]([O-])(=O)=O QFFVPLLCYGOFPU-UHFFFAOYSA-N 0.000 claims description 7
- 239000006229 carbon black Substances 0.000 claims description 7
- HBHZKFOUIUMKHV-UHFFFAOYSA-N chembl1982121 Chemical compound OC1=CC=C2C=CC=CC2=C1N=NC1=CC=C([N+]([O-])=O)C=C1[N+]([O-])=O HBHZKFOUIUMKHV-UHFFFAOYSA-N 0.000 claims description 7
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 claims description 7
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 230000004224 protection Effects 0.000 claims description 6
- CYMHAQCMKNVHPA-UHFFFAOYSA-N 3-butyl-2-heptan-3-yl-1,3-oxazolidine Chemical compound CCCCC(CC)C1OCCN1CCCC CYMHAQCMKNVHPA-UHFFFAOYSA-N 0.000 claims description 5
- -1 aliphatic isocyanate Chemical class 0.000 claims description 5
- 239000012948 isocyanate Substances 0.000 claims description 5
- UPIKAIAOTXEAAZ-UHFFFAOYSA-N 2-(1,3-oxazolidin-3-yl)ethanol Chemical compound OCCN1CCOC1 UPIKAIAOTXEAAZ-UHFFFAOYSA-N 0.000 claims description 4
- DZARITHRMKPIQB-UHFFFAOYSA-N 2-(2-propan-2-yl-1,3-oxazolidin-3-yl)ethanol Chemical compound CC(C)C1OCCN1CCO DZARITHRMKPIQB-UHFFFAOYSA-N 0.000 claims description 4
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 4
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 4
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 4
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 4
- 125000000160 oxazolidinyl group Chemical group 0.000 claims description 3
- WYNCHZVNFNFDNH-UHFFFAOYSA-N Oxazolidine Chemical compound C1COCN1 WYNCHZVNFNFDNH-UHFFFAOYSA-N 0.000 claims description 2
- 239000004408 titanium dioxide Substances 0.000 claims description 2
- LEHFSLREWWMLPU-UHFFFAOYSA-B zirconium(4+);tetraphosphate Chemical compound [Zr+4].[Zr+4].[Zr+4].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LEHFSLREWWMLPU-UHFFFAOYSA-B 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 26
- 238000000576 coating method Methods 0.000 abstract description 26
- 230000001681 protective effect Effects 0.000 abstract description 8
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
- 229920002396 Polyurea Polymers 0.000 description 26
- 238000001723 curing Methods 0.000 description 21
- 235000010215 titanium dioxide Nutrition 0.000 description 6
- 238000006683 Mannich reaction Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 229910000420 cerium oxide Inorganic materials 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
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- 230000005855 radiation Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000008098 formaldehyde solution Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000013008 moisture curing Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Abstract
The invention belongs to the technical field of coating materials, and discloses a nano modified single-component high-strength elastic protective coating, and a preparation method and application thereof. Compared with the prior art, the nano modified single-component high-strength elastic protective coating prepared by the invention has excellent mechanical property and protective property, and can be used for well protecting and reinforcing a hydraulic concrete base surface in severe cold high-altitude areas.
Description
Technical Field
The invention relates to the technical field of coating materials, in particular to a nano modified single-component high-strength elastic protective coating, a preparation method and application thereof.
Background
The protective material is coated on the surface of the hydraulic concrete, so that corrosive media can be effectively prevented from entering the concrete, and the hydraulic concrete is more in line with the requirements of early protection and later repair of under-construction or built hydraulic and hydroelectric engineering compared with other protective measures, and has lower comprehensive cost. In recent years, the development of protective repair coating materials for hydraulic concrete is very good.
As a novel material, the polyurea has the characteristics of quick solidification, strong corrosion resistance, strong weather resistance, excellent mechanical property, quick construction and the like, can be well combined with structural materials such as concrete, steel and the like through sufficient surface treatment, and is successfully applied to large-scale projects such as dams, reservoirs, bridges and the like to provide protection for the large-scale projects. The polyurea coating material can be divided into a two-component polyurea and a one-component polyurea according to the composition. The equipment for spraying the double-component polyurea is often large in size, so that the application of the double-component polyurea in hydraulic engineering protection is limited to a certain extent, and the raw materials and construction cost of the double-component polyurea are high, so that the double-component polyurea is not beneficial to large-area popularization and application.
In recent years, a single-component polyurea coating starts to appear in the market, the component A and the component B with the end caps are mixed in proportion in advance, and the single-component polyurea coating is directly used without on-site mixing and is simple and convenient to operate by manual knife coating. The single-component polyurea mainly relies on moisture curing, the reaction activity is mild, the gel time is longer than that of spraying and double-component manual polyurea, and meanwhile, the formed paint film is compact, good in permeation resistance, good in adhesion effect and the like, so that the single-component polyurea paint film has better and wider adaptability.
The film compactness and adhesiveness of the single-component polyurea coating are better than those of the double-component coating due to the inherent characteristics of the single-component polyurea coating, but the film compactness and adhesiveness are strong in ultraviolet radiation in some severe cold high-altitude areas such as Tibet areas, the weather is dry, the day-night temperature difference is large, and under the alternating and continuous actions of severe environments, the performances of more single-component polyurea coating products on the market are uneven, so that the mechanical performance and the protective performance of the single-component polyurea material can not meet the requirements of hydroelectric and hydraulic engineering.
Disclosure of Invention
In view of the above, the invention provides a nano modified single-component high-strength elastic protective coating, a preparation method and application thereof, and the coating has excellent mechanical properties and protective properties, so as to solve the technical problems that the single-component polyurea protective coating in severe cold high-altitude areas has poor protective properties and mechanical properties and seriously affects the service life of hydraulic concrete.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a nano modified single-component high-strength elastic protective coating comprises the following raw materials in parts by weight: 15-45 parts of polyether polyol, 15-30 parts of diisocyanate, 3-7 parts of chain extender, 16-28 parts of nano filler, 1-5 parts of latent curing agent, 10-20 parts of diluent, 3-8 parts of modified polyether amine and 3-5 parts of pigment and filler.
In a further aspect of the present invention, the nanofiller includes: ceria, nano zinc oxide, nano clay, alpha zirconium phosphate.
In a further technical scheme of the invention, the nano filler comprises the following components in parts by weight: 0.3 to 1 part of cerium dioxide, 5 to 10 parts of nano zinc oxide, 10 to 15 parts of nano clay and 0.7 to 2 parts of alpha-zirconium phosphate.
In a further technical scheme of the invention, the modified polyetheramine is lignin grafted polyetheramine.
In a further technical scheme of the invention, the latent curing agent is an oxazolidine curing agent.
In a further technical scheme of the invention, the oxazolidine curing agent is one or a combination of more of 2-isopropyl-3-hydroxyethyl-1, 3 oxazolidine, 3-hydroxyethyl-1, 3-oxazolidine and 3-butyl-2- (1-ethylpentyl) oxazolidine.
In a further technical scheme of the invention, the chain extender is 1, 4-butanediol.
In a further technical scheme of the invention, the diluent is ethyl acetate.
In a further technical scheme of the invention, the pigment and filler is at least one of carbon black, titanium dioxide, red powder, permanent yellow, permanent orange, phthalocyanine green, phthalocyanine blue and permanent violet.
In a further technical scheme of the invention, the polyether polyol is at least one of polyether PPG1000, polyether PPG2000, polyether 3050 and polyether 330N
In a further embodiment of the present invention, the diisocyanate is an aliphatic isocyanate.
In a further technical scheme of the invention, the aliphatic isocyanate is one of isophorone diisocyanate, hexamethylene diisocyanate and 4,4' -dicyclohexylmethane diisocyanate.
In a further technical scheme of the invention, the preparation method of the nano modified single-component high-strength elastic protective coating specifically comprises the following steps:
uniformly mixing polyether polyol, modified polyether amine and a diluent in parts by weight, adding the mixture into a vacuum dehydration stirring kettle, heating to 80 ℃, adding pigment and filler, continuously heating to 120-130 ℃, and dehydrating at the vacuum degree of-0.09 MPa for 2-3 h until the water content is less than or equal to 0.03%;
cooling to 65 ℃, adding diisocyanate, heating to 80 ℃, and reacting for 1.5-2.5 h at a temperature;
thirdly, cooling to 60 ℃, adding a chain extender, and reacting for 0.5-1.5 h;
transferring the mixture in the vacuum dehydration stirring kettle into a planetary stirring tank after the reaction is finished, sequentially adding the latent curing agent and the nano filler in parts by weight, dispersing for 30min at the rotating speed of 600-1000 r/min, cooling to 50 ℃, and vacuum defoaming for 10min to obtain the nano modified single-component high-strength elastic protective coating.
In a further technical scheme of the invention, the prepared nano modified single-component high-strength elastic protective coating is applied to the protection of hydraulic concrete in severe cold high-altitude areas.
According to the technical scheme, the invention discloses a nano modified single-component high-strength elastic protective coating and a preparation method thereof. Compared with the prior art, the invention has the following technical effects:
1. for the problems that the construction requirement of the traditional polyurea coating is high and special large-scale spraying equipment is required, the nano modified single-component high-strength elastic protective coating prepared by the invention can be manually knife coated, the thickness of the coating is about 1mm in each construction, and meanwhile, paint mist pollution is not caused to the surrounding environment.
2. For hydraulic concrete in severe environments such as severe cold and high altitude, the problems of huge loss of the hydraulic concrete caused by ultraviolet rays, large day and night temperature difference, easy occurrence of cracks due to dry weather and the like are solved, the nano modified single-component high-strength elastic protective coating has excellent mechanical property and protective property, and the nano modified single-component high-strength elastic protective coating can be used for well protecting and reinforcing a hydraulic concrete base surface.
3. Compared with a single-component polyurea coating, the invention adds cerium oxide, nano zinc oxide, nano clay and alpha-zirconium phosphate to reinforce the performance of the polyurea coating, wherein the addition of the nano clay can improve the breaking growth rate, tensile strength and shearing strength of the coating after the coating is prepared into the coating, so that the coating has high strength and high elasticity; the wear resistance and the waterproof performance of the polyurea coating after the coating is formed are improved by adding the alpha-zirconium phosphate nano material, and the coating has a certain lubricity and obvious antifriction effect due to the fact that the alpha-zirconium phosphate has a lamellar structure; the nano zinc oxide and the ceria are added in a matched manner, so that enrichment of bacteria on the surface of the polyurea coating can be effectively reduced, on the other hand, the ceria is a rare earth metal oxide which can play a good role in corrosion inhibition, and the polyurea coating has excellent corrosion resistance after the nano zinc oxide and the ceria are added.
4. Compared with the traditional single-component polyurea coating added with single polyetheramine, the lignin grafted polyetheramine is added, so that the protective coating prepared by the invention has good ultraviolet resistance and corrosion resistance, and can be better used for resisting the damage of strong ultraviolet radiation to hydraulic concrete in severe cold high-altitude areas.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention discloses a nano modified single-component high-strength elastic protective coating, which comprises the following raw materials in parts by weight: 15-45 parts of polyether polyol, 15-30 parts of diisocyanate, 3-7 parts of chain extender, 16-28 parts of nano filler, 1-5 parts of latent curing agent, 10-20 parts of diluent, 3-8 parts of modified polyether amine and 3-5 parts of pigment and filler.
The preparation method of the nano modified single-component high-strength elastic protective coating specifically comprises the following steps:
uniformly mixing polyether polyol, modified polyether amine and a diluent in parts by weight, adding the mixture into a vacuum dehydration stirring kettle, heating to 80 ℃, adding pigment and filler, continuously heating to 120-130 ℃, and dehydrating at the vacuum degree of-0.09 MPa for 2-3 h until the water content is less than or equal to 0.03%;
cooling to 65 ℃, adding diisocyanate, heating to 80 ℃, and reacting for 1.5-2.5 h at a temperature;
thirdly, cooling to 60 ℃, adding a chain extender, and reacting for 0.5-1.5 h;
transferring the mixture in the vacuum dehydration stirring kettle into a planetary stirring tank after the reaction is finished, sequentially adding the latent curing agent and the nano filler in parts by weight, dispersing for 30min at the rotating speed of 600-1000 r/min, cooling to 50 ℃, and vacuum defoaming for 10min to obtain the nano modified single-component high-strength elastic protective coating.
Wherein, the nano filler comprises the following components in parts by weight: 0.3 to 1 part of cerium dioxide, 5 to 10 parts of nano zinc oxide, 10 to 15 parts of nano clay and 0.7 to 2 parts of alpha-zirconium phosphate.
The modified polyetheramine is lignin grafted polyetheramine prepared by Mannich reaction, specifically, lignin is dissolved in 2% NaOH solution, and the lignin is added into a 500mL three-necked flask under mechanical stirring, then heated to 50 ℃, and then stirred for lh to ensure sufficient dissolution of lignin. Subsequently, polyetheramine was added and stirred for 1h to thoroughly mix with lignin. The temperature was raised to 80℃and then a 37% formaldehyde solution was added dropwise to the flask with stirring, after 2.5 hours of reaction, 20% H was used 2 SO 4 Acidifying the reaction solution, precipitating a product, washing with distilled water, filtering, and vacuum drying at 55 ℃ for 24 hours.
The latent curing agent is an oxazolidine curing agent, and specifically is one or a combination of more of 2-isopropyl-3-hydroxyethyl-1, 3-oxazolidine, 3-hydroxyethyl-1, 3-oxazolidine and 3-butyl-2- (1-ethylpentyl) oxazolidine.
Wherein the chain extender is 1, 4-butanediol.
Wherein the diluent is ethyl acetate.
Wherein the pigment and filler is at least one of carbon black, titanium white, red powder, permanent yellow, permanent orange, phthalocyanine green, phthalocyanine blue and permanent violet.
Wherein the polyether polyol is at least one of polyether PPG1000, polyether PPG2000, polyether 3050 and polyether 330N
Wherein the diisocyanate is aliphatic isocyanate; in particular to one of isophorone diisocyanate, hexamethylene diisocyanate and 4,4' -dicyclohexylmethane diisocyanate.
The prepared nano modified single-component high-strength elastic protective coating is applied to the protection of hydraulic concrete in severe cold high-altitude areas.
Example 1
A nano modified single-component high-strength elastic protective coating comprises the following raw materials in parts by weight: 15 parts of polyether polyol, 15 parts of diisocyanate, 3 parts of chain extender, 16 parts of nano filler, 1 part of latent curing agent, 10 parts of diluent, 3 parts of modified polyether amine and 3 parts of pigment filler.
Wherein, the nano filler comprises the following components in parts by weight: 0.3 part of cerium oxide, 5 parts of nano zinc oxide, 10 parts of nano clay and 0.7 part of alpha-zirconium phosphate.
Wherein the modified polyetheramine is lignin grafted polyetheramine prepared by Mannich reaction.
Wherein the latent curing agent is 2-isopropyl-3-hydroxyethyl-1, 3-oxazolidine.
Wherein the chain extender is 1, 4-butanediol.
Wherein the diluent is ethyl acetate.
Wherein the pigment and filler is at least one of carbon black, titanium white, red powder, permanent yellow, permanent orange, phthalocyanine green, phthalocyanine blue and permanent violet.
Wherein the polyether polyol is polyether PPG1000.
Wherein the diisocyanate is isophorone diisocyanate.
The preparation method of the nano modified single-component high-strength elastic protective coating in the embodiment 1 specifically comprises the following steps:
uniformly mixing polyether polyol, modified polyether amine and a diluent in parts by weight, adding the mixture into a vacuum dehydration stirring kettle, heating to 80 ℃, adding pigment and filler, continuously heating to 120 ℃, and dehydrating for 2 hours at the vacuum degree of-0.09 MPa until the water content is less than or equal to 0.03%;
cooling to 65 ℃, adding diisocyanate, heating to 80 ℃, and carrying out heat preservation reaction for 1.5h;
thirdly, cooling to 60 ℃, adding a chain extender, and reacting for 0.5h;
transferring the mixture in the vacuum dehydration stirring kettle into a planetary stirring tank after the reaction is finished, sequentially adding the latent curing agent and the nano filler in parts by weight, dispersing for 30min at the rotating speed of 600 r/min, cooling to 50 ℃, and vacuum defoaming for 10min to obtain the nano modified single-component high-strength elastic protective coating.
Example 2
A nano modified single-component high-strength elastic protective coating comprises the following raw materials in parts by weight: 45 parts of polyether polyol, 30 parts of diisocyanate, 7 parts of chain extender, 28 parts of nano filler, 5 parts of latent curing agent, 20 parts of diluent, 8 parts of modified polyether amine and 5 parts of pigment filler.
Wherein, the nano filler comprises the following components in parts by weight: 1 cerium oxide, 10 parts of nano zinc oxide, 15 parts of nano clay and 2 parts of alpha-zirconium phosphate.
Wherein the modified polyetheramine is lignin grafted polyetheramine prepared by Mannich reaction.
Wherein the latent curing agent is 3-hydroxyethyl-1, 3-oxazolidine.
Wherein the chain extender is 1, 4-butanediol.
Wherein the diluent is ethyl acetate.
Wherein the pigment and filler is at least one of carbon black, titanium white, red powder, permanent yellow, permanent orange, phthalocyanine green, phthalocyanine blue and permanent violet.
Wherein the polyether polyol is polyether PPG2000.
Wherein the diisocyanate is hexamethylene diisocyanate.
The preparation method of the nano modified single-component high-strength elastic protective coating in the embodiment 2 specifically comprises the following steps:
uniformly mixing polyether polyol, modified polyether amine and a diluent in parts by weight, adding the mixture into a vacuum dehydration stirring kettle, heating to 80 ℃, adding pigment and filler, continuously heating to 130 ℃, and dehydrating for 3 hours at the vacuum degree of-0.09 MPa until the water content is less than or equal to 0.03%;
cooling to 65 ℃, adding diisocyanate, heating to 80 ℃, and carrying out heat preservation reaction for 2.5h;
thirdly, cooling to 60 ℃, adding a chain extender, and reacting for 1.5 hours;
transferring the mixture in the vacuum dehydration stirring kettle into a planetary stirring tank after the reaction is finished, sequentially adding the latent curing agent and the nano filler in parts by weight, dispersing for 30min at the rotating speed of 1000 r/min, cooling to 50 ℃, and vacuum defoaming for 10min to obtain the nano modified single-component high-strength elastic protective coating.
Example 3
A nano modified single-component high-strength elastic protective coating comprises the following raw materials in parts by weight: 30 parts of polyether polyol, 23 parts of diisocyanate, 5 parts of chain extender, 22 parts of nano filler, 3.5 parts of latent curing agent, 15 parts of diluent, 5.5 parts of modified polyether amine and 4 parts of pigment filler.
Wherein, the nano filler comprises the following components in parts by weight: 0.65 part of cerium oxide, 7.5 parts of nano zinc oxide, 12.5 parts of nano clay and 1.35 parts of alpha-zirconium phosphate.
Wherein the modified polyetheramine is lignin grafted polyetheramine prepared by Mannich reaction.
Wherein the latent curing agent is 3-butyl-2- (1-ethylpentyl) oxazolidine.
Wherein the chain extender is 1, 4-butanediol.
Wherein the diluent is ethyl acetate.
Wherein the pigment and filler is at least one of carbon black, titanium white, red powder, permanent yellow, permanent orange, phthalocyanine green, phthalocyanine blue and permanent violet.
Wherein the polyether polyol is polyether 3050.
Wherein the diisocyanate is 4,4' -dicyclohexylmethane diisocyanate.
The preparation method of the nano modified single-component high-strength elastic protective coating specifically comprises the following steps:
uniformly dispersing and mixing polyether polyol, modified polyether amine and a diluent in parts by weight at a low speed, adding the mixture into a vacuum dehydration stirring kettle, heating to 80 ℃, adding pigment and filler, continuously heating to 125 ℃, and dehydrating at a vacuum degree of-0.09 MPa for 2.5h until the water content is less than or equal to 0.03%;
cooling to 65 ℃, adding diisocyanate, heating to 80 ℃, and carrying out heat preservation reaction for 2 hours;
thirdly, cooling to 60 ℃, adding a chain extender, and reacting for 1h;
transferring the mixture in the vacuum dehydration stirring kettle into a planetary stirring tank after the reaction is finished, sequentially adding the latent curing agent and the nano filler in parts by weight, dispersing for 30min at the rotation speed of 800 r/min, cooling to 50 ℃, and vacuum defoaming for 10min to obtain the nano modified single-component high-strength elastic protective coating.
Comparative example
A single-component high-strength elastic protective coating comprises the following raw materials in parts by weight: 30 parts of polyether polyol, 23 parts of diisocyanate, 5 parts of chain extender, 3.5 parts of latent curing agent, 15 parts of diluent, 5.5 parts of modified polyether amine and 4 parts of pigment and filler.
Wherein the modified polyetheramine is lignin grafted polyetheramine prepared by Mannich reaction.
Wherein the latent curing agent is 3-butyl-2- (1-ethylpentyl) oxazolidine.
Wherein the chain extender is 1, 4-butanediol.
Wherein the diluent is ethyl acetate.
Wherein the pigment and filler is at least one of carbon black, titanium white, red powder, permanent yellow, permanent orange, phthalocyanine green, phthalocyanine blue and permanent violet.
Wherein the polyether polyol is polyether 3050.
Wherein the diisocyanate is 4,4' -dicyclohexylmethane diisocyanate.
The preparation method of the nano modified single-component high-strength elastic protective coating specifically comprises the following steps:
uniformly dispersing and mixing polyether polyol, modified polyether amine and a diluent in parts by weight at a low speed, adding the mixture into a vacuum dehydration stirring kettle, heating to 80 ℃, adding pigment and filler, continuously heating to 125 ℃, and dehydrating at a vacuum degree of-0.09 MPa for 2.5h until the water content is less than or equal to 0.03%;
cooling to 65 ℃, adding diisocyanate, heating to 80 ℃, and carrying out heat preservation reaction for 2 hours;
thirdly, cooling to 60 ℃, adding a chain extender, and reacting for 1h;
transferring the mixture in the vacuum dehydration stirring kettle into a planetary stirring tank after the reaction is finished, sequentially adding the parts by weight of the added latent curing agent, dispersing for 30min at the rotating speed of 800 r/min, cooling to 50 ℃, and vacuum defoaming for 10min to obtain the single-component high-strength elastic protective coating.
The protective coating prepared by the invention and the comparative example is subjected to performance test, the mechanical properties of the performance test protective coating are tested according to JC/T2435-2018 single-component polyurea waterproof coating, and the test standard and the test result are shown in Table 1.
TABLE 1
The performance test results in Table 1 show that the performance of the nano modified single-component high-strength elastic protective coating meets the performance requirement and is far higher than the standard, and compared with the performance of the protective coating prepared by the comparative example without nano filler, the performance of the protective coating prepared by the invention has obvious superiority.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A nano modified single-component high-strength elastic protective coating is characterized in that: the material comprises the following raw materials in parts by weight: 15-45 parts of polyether polyol, 15-30 parts of diisocyanate, 3-7 parts of chain extender, 16-28 parts of nano filler, 1-5 parts of latent curing agent, 10-20 parts of diluent, 3-8 parts of modified polyether amine and 3-5 parts of pigment and filler; the nanofiller includes: ceria, nano zinc oxide, nano clay, alpha zirconium phosphate.
2. The nano-modified single-component high-strength elastic protective coating according to claim 1, wherein the nano-modified single-component high-strength elastic protective coating is characterized in that: the nano filler comprises the following components in parts by weight: 0.3-1 part of cerium dioxide, 5-10 parts of nano zinc oxide, 10-15 parts of nano clay and 0.7-2 parts of alpha-zirconium phosphate.
3. The nano-modified single-component high-strength elastic protective coating according to claim 1, wherein the nano-modified single-component high-strength elastic protective coating is characterized in that: the modified polyetheramine is lignin grafted polyetheramine.
4. The nano-modified single-component high-strength elastic protective coating according to claim 1, wherein the nano-modified single-component high-strength elastic protective coating is characterized in that: the latent curing agent is an oxazolidine curing agent; the chain extender is 1, 4-butanediol; the diluent is ethyl acetate; the pigment and filler is at least one of carbon black, titanium dioxide, red powder, permanent yellow, permanent orange, phthalocyanine green, phthalocyanine blue and permanent violet; the polyether polyol is at least one of polyether PPG1000, polyether PPG2000, polyether 3050 and polyether 330N; the diisocyanate is aliphatic isocyanate.
5. The nano-modified single-component high-strength elastic protective coating according to claim 4, wherein the nano-modified single-component high-strength elastic protective coating is characterized in that: the oxazolidine curing agent is one or a combination of more of 2-isopropyl-3-hydroxyethyl-1, 3 oxazolidine, 3-hydroxyethyl-1, 3-oxazolidine and 3-butyl-2- (1-ethylpentyl) oxazolidine.
6. The nano-modified single-component high-strength elastic protective coating according to claim 4, wherein the nano-modified single-component high-strength elastic protective coating is characterized in that: the aliphatic isocyanate is one of isophorone diisocyanate, hexamethylene diisocyanate and 4,4' -dicyclohexylmethane diisocyanate.
7. A method for preparing the nano modified high-strength elastic protective coating according to any one of claims 1 to 6, which comprises the following steps:
uniformly mixing polyether polyol, modified polyether amine and a diluent in parts by weight, adding the mixture into a vacuum dehydration stirring kettle, heating to 80 ℃, adding pigment and filler, continuously heating to 120-130 ℃, and dehydrating at the vacuum degree of-0.09 MPa for 2-3 h until the water content is less than or equal to 0.03%;
cooling to 65 ℃, adding diisocyanate, heating to 80 ℃, and reacting for 1.5-2.5 h at a temperature;
thirdly, cooling to 60 ℃, adding a chain extender, and reacting for 0.5-1.5 h;
transferring the mixture in the vacuum dehydration stirring kettle into a planetary stirring tank after the reaction is finished, sequentially adding the latent curing agent and the nano filler in parts by weight, dispersing for 30min at the rotating speed of 600-1000 r/min, cooling to 50 ℃, and vacuum defoaming for 10min to obtain the nano modified single-component high-strength elastic protective coating.
8. Use of the nano modified high-strength elastic protective coating according to any one of claims 1 to 6 in hydraulic concrete protection in severe cold high-altitude areas.
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