CN118064058A

CN118064058A - Water-based heavy-duty anticorrosive paint and preparation method thereof

Info

Publication number: CN118064058A
Application number: CN202410222504.1A
Authority: CN
Inventors: 钟万才; 孙阔腾; 郑武略; 李飞虎; 崔志墩; 夏立杰; 吴永意; 莫柳军; 唐鑫
Original assignee: Liuzhou Bureau of Extra High Voltage Power Transmission Co
Current assignee: Liuzhou Bureau of Extra High Voltage Power Transmission Co
Priority date: 2024-02-28
Filing date: 2024-02-28
Publication date: 2024-05-24

Abstract

The application relates to a water-based heavy-duty anticorrosive paint and a preparation method thereof. The water-based heavy-duty anticorrosive paint comprises the following raw materials in parts by weight: 40-60 parts of carbon titanium cage resin, 15-25 parts of modified basalt flakes, 20-30 parts of water, and 7-16 parts of functional auxiliary agents; wherein the carbon titanium cage resin comprises inorganic nano particles and acrylic acid molecular chains grafted on the surfaces of the inorganic nano particles; the modified basalt flakes comprise basalt flakes, a silane coupling agent and graphene. The water-based heavy-duty coating provided by the application has excellent heavy-duty performance, and the salt-water-resistant time of the anti-corrosion coating prepared by the water-based heavy-duty coating reaches more than 42 days, and the neutral-salt-fog-resistant time reaches more than 1000 hours.

Description

Water-based heavy-duty anticorrosive paint and preparation method thereof

Technical Field

The application relates to the technical field of heavy-duty coating, in particular to a water-based heavy-duty coating and a preparation method thereof.

Background

The transmission tower and the power line are taken as important components of a high-voltage power grid and are usually exposed to severe natural environments such as humidity, high temperature, cold and the like so as to cause serious corrosion, and the safe operation of the transmission tower and the power line is not separated from effective corrosion operation and maintenance measures. In the aspect of corrosion operation and maintenance of power transmission towers and power lines, operation and maintenance strategies are gradually changed from single facility corrosion investigation and operation and maintenance to full-line, typical line and multi-position corrosion operation and maintenance, so that corrosion operation and maintenance equipment also needs to have the performance requirement of resisting complex corrosion environments. For corrosion operation and maintenance equipment and high-voltage power grids facing severe corrosion environments, coating the surfaces of the corrosion operation and maintenance equipment and the high-voltage power grids with corrosion-resistant coatings to form corrosion-resistant coatings is the most economical, efficient and simple corrosion-resistant means. Among them, heavy duty coating refers to a type of anticorrosive coating that can be applied in a relatively severe corrosive environment and has a long-lasting anticorrosive life.

At present, heavy anti-corrosion paint is mainly compounded by antirust pigment and filler and organic solvent type resin. The traditional antirust pigment and filler mainly comprises talcum powder, titanium dioxide, glass flakes, zinc powder and the like. Wherein, the anti-corrosion effect of talcum powder and titanium dioxide is single; the glass flakes have poor chemical corrosion resistance and weather resistance due to high content of alkaline oxide; although the zinc powder can play a role in cathode protection, the shielding performance is insufficient, and the mass ratio of the zinc powder in the heavy anti-corrosion coating is 60-85%, so that the coating performance can be greatly influenced. Meanwhile, the organic solvent type resin can emit a large amount of volatile organic compounds (volatile organic compounds, VOC) in the construction and use processes, threatens the environment and human bodies, and cannot meet the development requirements of green and environment protection. The aqueous coating material is favored because of its environmental friendliness by replacing the organic solvent type resin with an aqueous resin. However, most of the water-based paints have unsatisfactory weather resistance and corrosion resistance, and cannot meet the requirements of heavy-duty anticorrosive paints.

Disclosure of Invention

Based on the above, it is necessary to provide an aqueous heavy-duty coating and a preparation method thereof, so as to solve the problems that most of the aqueous coatings are not ideal in weather resistance and corrosion resistance and cannot meet the requirements of the heavy-duty coating.

The above object of the present application is achieved by the following technical solutions:

The application provides an aqueous heavy-duty anticorrosive paint, which comprises the following raw materials in parts by weight:

40-60 parts of carbon titanium cage resin,

15-25 Parts of modified basalt flakes,

20-30 Parts of water

7-16 Parts of functional auxiliary agent;

Wherein the carbon titanium cage resin comprises inorganic nano particles and acrylic acid molecular chains grafted on the surfaces of the inorganic nano particles;

the modified basalt flakes comprise basalt flakes, a silane coupling agent and graphene.

In one embodiment, the modified basalt flakes comprise the following raw materials in parts by weight:

10-15 parts of basalt flakes,

3-6 Parts of silane coupling agent and

2-4 Parts of graphene.

In one embodiment, the basalt flakes include one or more of olive basalt flakes and perillene basalt flakes.

In one embodiment, the basalt flakes have a gauge ratio of 12 or more.

In one embodiment, the graphene comprises one or more of polycrystalline graphene, graphene oxide, graphene nitride, and reduced graphene oxide.

In one embodiment, the ratio of the diameter to the thickness of the graphene is more than or equal to 2000.

In one embodiment, the inorganic nanoparticles in the carbon titanium cage resin comprise titanium dioxide nanoparticles.

In one embodiment, the carbon titanium cage resin has a number average molecular weight of 60000 or more and a weight average molecular weight of 100000 or more.

In one embodiment, the carbon titanium cage resin has a VOC content of 25% or less.

In one embodiment, the carbon titanium cage resin has a solid content of 48% -50%.

In one embodiment, the functional aid includes one or more of a waxy alignment agent, a flash rust inhibitor, a dispersant, a defoamer, a thickener, a film forming aid, and a leveling agent.

In one embodiment, the functional auxiliary comprises the following components in parts by weight:

2-3 parts of waxy alignment agent,

1-3 Parts of flash rust inhibitor,

1 To 3 parts of dispersing agent,

1 To 2 parts of defoaming agent,

0.5 To 1 part of thickener,

1-3 Parts of film forming auxiliary agent

0.5-1 Part of leveling agent.

In one embodiment, the waxy alignment agent comprises one or more of BYK-8421, XH-199 and P2100W.

In one embodiment, the anti-flash rust agent comprises one or more of HY-79 and R-755.

In one embodiment, the leveling agent includes one or more of a fluorocarbon modified acrylate leveling agent and an organosilicon leveling agent.

In a second aspect of the present application, there is provided a method for preparing the aqueous heavy duty coating as described above, comprising the steps of:

Mixing basalt flakes, graphene, a silane coupling agent and water to prepare first slurry;

Performing standing treatment and drying treatment on the first slurry to prepare modified basalt flakes;

mixing the modified basalt flakes, water, functional auxiliary agents and carbon titanium cage resin to prepare the water-based heavy-duty coating.

In one embodiment, the first slurry is subjected to a standing treatment and a drying treatment, including the steps of:

and standing the first slurry at 70-100 ℃ for 2-4 hours, and drying at 200-300 ℃ for 4-8 hours.

In one embodiment, the modified basalt flake, water, functional auxiliary agent and carbon titanium cage resin are mixed, comprising the following steps:

Mixing the modified basalt flakes, water, a dispersing agent, a film forming additive and a flash rust inhibitor, and stirring for 20-30 min at the rotating speed of 300-500 rpm to prepare second slurry;

mixing the second slurry and the carbon titanium cage resin, and stirring for 20-30 min at the rotation speed of 300-500 rpm to prepare a third slurry;

Mixing the third slurry, the waxy alignment agent, the defoaming agent and the leveling agent, and stirring at the rotating speed of 800-1000 rpm for 40-50 min to prepare a fourth slurry;

and adding a thickener into the fourth slurry at the rotating speed of 300-500 rpm, and adjusting the pH value to 7-9 to prepare the water-based heavy anti-corrosion coating.

The application has at least the following beneficial effects:

Basalt flakes are inorganic alkaline antirust pigment filler which realizes an anti-corrosion function by utilizing a physical barrier effect, have excellent chemical stability, and have an alkaline oxide content which is obviously lower than that of glass flakes, and excellent chemical corrosion resistance and aging resistance. However, the surface groups of the basalt flakes are mainly hydrophilic silicon hydroxyl groups, only hydrogen bonding and van der Waals force effects are usually generated between the basalt flakes and the water-based resin, and the steric hindrance effect of the basalt flakes makes the silicon hydroxyl groups have low self-reactivity, so that high-quality interface bonding effect is difficult to form between the basalt flakes and the water-based resin, and therefore the application of the basalt flakes in water-based paint is greatly limited.

Aiming at the discovery, the modified basalt flakes taking basalt flakes, a silane coupling agent and graphene as raw materials are adopted, on one hand, the compatibility, the crosslinking property and the interfacial bonding capability between the basalt flakes and carbon titanium cage resin are effectively improved by utilizing the coupling modification effect of the silane coupling agent, so that the modified basalt flakes can be stably and uniformly distributed in a resin matrix, and an excellent lamellar blocking effect is exerted; on the other hand, the synergistic cooperation of basalt flakes and graphene not only overcomes the defect that graphene is difficult to disperse, but also can form a 'labyrinth effect' of level complementation and overlap interlocking, effectively prevents or delays the diffusion and invasion of corrosive media, and greatly reduces the corrosion penetration rate of the corrosion-resistant coating. Meanwhile, the carbon-titanium cage resin comprises inorganic nano particles and acrylic acid molecular chains grafted on the surfaces of the inorganic nano particles, so that a hyperbranched three-dimensional net-shaped three-dimensional structure is formed, and compared with pure acrylic resin, the carbon-titanium cage resin has better corrosion resistance, film forming stability and crosslinking strength, and has certain self-repairing capability, so that the corrosion resistance life of the coating is prolonged. The water-based heavy-duty anticorrosive paint provided by the application is prepared by compounding carbon-titanium cage resin, modified basalt flakes, functional additives and the like, and has excellent heavy-duty anticorrosive performance, wherein the brine-resistant time of an anticorrosive coating prepared by using the water-based heavy-duty anticorrosive paint reaches more than 42 days, and the neutral-resistant salt fog time reaches more than 1000 hours.

Detailed Description

The following detailed description of the present application will provide further details in order to make the above-mentioned objects, features and advantages of the present application more comprehensible. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In the present application, "at least one" means one or more, such as one, two or more. The meaning of "plural" or "several" means at least two, for example, two, three, etc., and the meaning of "multiple" means at least two, for example, two, three, etc., unless specifically defined otherwise. In the description of the present application, the meaning of "several" means at least one, such as one, two, etc., unless specifically defined otherwise.

When a range of values is disclosed herein, the range is considered to be continuous and includes both the minimum and maximum values for the range, as well as each value between such minimum and maximum values. Further, when a range refers to an integer, each integer between the minimum and maximum values of the range is included. Further, when multiple range description features or characteristics are provided, the ranges may be combined. In other words, unless otherwise indicated, all ranges disclosed herein are to be understood to include any and all subranges subsumed therein.

All steps of the present application may be performed sequentially or randomly unless otherwise specified. For example, the method comprises steps (a) and (b), meaning that the method may comprise steps (a) and (b) performed sequentially, or may comprise steps (b) and (a) performed sequentially. For example, the method may further comprise step (c), meaning that step (c) may be added to the method in any order, e.g., the method may comprise steps (a), (b) and (c), steps (a), (c) and (b), steps (c), (a) and (b), etc.

In the present application, "above" or "below" includes the present number. E.g., 1 or less, including 1.

The temperature parameter in the present application is not particularly limited, and may be a constant temperature treatment or may vary within a predetermined temperature range. It should be appreciated that the constant temperature process described allows the temperature to fluctuate within the accuracy of the instrument control. Allows for fluctuations within a range such as + -5 ℃, + -4 ℃, + -3 ℃, + -2 ℃, + -1 ℃.

In the present application, room temperature means an indoor temperature, an ordinary temperature, or a general temperature. In general, the range of room temperature may be any one of the following temperature intervals: (1) 23 ℃ +/-2 ℃; (2) 25 ℃ +/-5 ℃; (3) 20 ℃ + -5 ℃.

The water paint (or water-based paint) is a paint using water as a film forming matter carrier and generally comprises water-based resin, water-based filler, water-based auxiliary agent, water and the like. The aqueous resin mainly comprises aqueous polyurethane resin, aqueous epoxy resin, aqueous alkyd resin and aqueous acrylic resin. However, the performance of the aqueous resin is difficult to achieve the performance of the organic solvent type resin, and particularly, a certain gap is still left between the weather resistance and the corrosion resistance, so that most of the aqueous paint cannot completely meet the requirements of the heavy-duty anticorrosive paint.

40-60 parts of carbon titanium cage resin,

15-25 Parts of modified basalt flakes,

20-30 Parts of water

7-16 Parts of functional auxiliary agent;

the modified basalt flakes include basalt flakes, a silane coupling agent, and graphene.

It can be understood that basalt scales are lamellar materials prepared from basalt ores through high-temperature melting, flow distribution, separation, precipitation and other processes, the thickness of the lamellar materials is about 2-5 mu m, the diameter of the lamellar materials is about 25-3 mu m, and the lamellar structure with the height-diameter-thickness ratio can play a good physical barrier role and can prevent or delay penetration of corrosive media to provide anti-corrosion protection.

It can be appreciated that in the raw materials of the aqueous heavy-duty coating, the weight parts of the carbon titanium cage resin are 40-60 parts, including but not limited to: 40 parts, 45 parts, 50 parts, 55 parts and 60 parts, and further optional 50 parts to 60 parts; 15-25 parts of modified basalt flakes, including but not limited to: 15 parts, 18 parts, 20 parts, 22 parts, 24 parts and 25 parts, and further optional 20 parts to 25 parts; the weight portion of water is 20-30 portions including but not limited to: 20 parts, 22 parts, 24 parts, 26 parts, 28 parts and 30 parts, and 25-30 parts can be further selected; the functional auxiliary agent comprises 7-16 parts by weight including but not limited to: 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts and 16 parts, further optionally 10 to 16 parts.

It will be appreciated that the water in the aqueous heavy duty coating comprises one or more of tap water, deionized water, reverse osmosis water, distilled water, pure water and ultra-pure water, further optionally deionized water.

In some embodiments, the modified basalt flakes comprise the following raw materials in parts by weight:

10-15 parts of basalt flakes,

3-6 Parts of silane coupling agent and

2-4 Parts of graphene.

It is understood that, in the raw materials of the modified basalt flake, the weight parts of the basalt flake are 10 to 15 parts, including but not limited to: 10 parts, 11 parts, 12 parts, 13 parts, 14 parts and 15 parts, further optionally 15 parts; the weight part of the silane coupling agent is 3-6 parts, including but not limited to: 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, 5.5 parts and 6 parts, further optionally 6 parts; 2-3 parts of graphene by weight, including but not limited to: 2 parts, 2.2 parts, 2.5 parts, 2.8 parts, 3 parts, 3.2 parts, 3.5 parts, 3.8 parts and 4 parts, further optionally 3 parts.

In some embodiments, the basalt flakes include one or more of olive basalt flakes and perillene basalt flakes, further optionally olive basalt flakes.

In some embodiments, the basalt flake has a gauge ratio of ≡12, including but not limited to: 12. 15, 18, 21, 24, 27 and 30, further alternatively 12 to 18, it being understood that the thickness and diameter of the basalt flakes are not particularly limited as long as they satisfy the aspect ratio of 12 or more. In some embodiments, the basalt flakes have a thickness of 2 μm to 9 μm and a diameter of 25 μm to 150 μm.

In some embodiments, the graphene comprises one or more of polycrystalline graphene, graphene oxide, graphene nitride, and reduced graphene oxide, further optionally graphene oxide.

In some embodiments, the aspect ratio of graphene is greater than or equal to 2000. Including but not limited to: 2000. 2500, 3000, 3500, 4000, 4500, 5000, 5500, 6000, 6500, 7000, 7500, 8000, 8500, 9000, 9500 and 10000, further optionally 5000 to 10000, still further optionally 7600 to 9500. It is understood that the thickness and diameter of the graphene are not particularly limited as long as the graphene satisfies the aspect ratio of not less than 2000. In some specific embodiments, the graphene has a thickness of 1nm to 5nm and a diameter of 2 μm to 10 μm.

In some embodiments, the inorganic nanoparticles in the carbon titanium cage resin comprise titanium dioxide nanoparticles.

In some embodiments, the inorganic nanoparticles in the carbon titanium cage resin further comprise silica nanoparticles, i.e., the inorganic nanoparticles in the carbon titanium cage resin are TiO ₂/SiO₂ composites.

In some embodiments, the particle size of the inorganic nanoparticles in the carbon titanium cage resin is 10nm to 30nm, including but not limited to: 10nm, 12nm, 15nm, 18nm, 20nm, 22nm, 25nm, 28nm and 30nm.

In some embodiments, the carbon titanium cage resin has a particle size of 150nm to 200nm, including but not limited to: 150nm, 160nm, 170nm, 180nm, 190nm and 200nm.

In some embodiments, the carbon titanium cage resin has a number average molecular weight of 60000 or greater and a weight average molecular weight of 100000 or greater. Further alternatively, the carbon-titanium cage resin has a number average molecular weight of 60000-62000 and a weight average molecular weight of 100000-110000. Still further alternatively, the carbon titanium cage resin has a number average molecular weight of 61277 and a weight average molecular weight of 103665.

In some embodiments, the VOC content of the carbon titanium cage resin is less than or equal to 25%, including, but not limited to: 25%, 24%, 22%, 20%, 15%, 10%, 5% and 1%.

In some embodiments, the carbon titanium cage resin has a solids content of 48% -50%, including but not limited to: 48%, 48.5%, 49%, 49.5% and 50%.

TiO ₂ nano particles (or TiO ₂/SiO₂ composite material) with the particle size of 10-30 nm are used as a nucleus body, and acrylic acid molecular chains are grafted on the surface of the nucleus body in situ, so that the water-dispersible high molecular compound with the hyperbranched multi-dendritic framework structure is formed. The carbon-titanium cage resin has ultrahigh number average molecular weight and weight average molecular weight, good fluidity and good workability, and is easy to form a film. Acrylic acid molecular chains extending in the framework extend out of the carbon titanium cage aggregate during film formation, and gradually and alternately wind and chemically cross-link in the phase change process, so that a compact anti-corrosion coating is finally formed. Compared with other water-based resins, the carbon-titanium cage resin has higher film forming speed and higher coating density, can effectively block the contact between the corrosive medium and the substrate, and obviously improves the corrosion prevention effect and the corrosion prevention service life. Meanwhile, after the carbon titanium cage resin is formed into a film, the coating does not contain double bonds and active hydrogen which are easy to oxidize, and the TiO ₂ nano particles serving as a core body have a strong ultraviolet absorption function, so that the carbon titanium cage resin has super weather resistance.

In some embodiments, the functional aid includes one or more of a waxy alignment agent, a flash rust inhibitor, a dispersant, a defoamer, a thickener, a film forming aid, and a leveling agent.

In some embodiments, the functional auxiliary comprises the following components in parts by weight:

2-3 parts of waxy alignment agent,

1-3 Parts of flash rust inhibitor,

1 To 3 parts of dispersing agent,

1 To 2 parts of defoaming agent,

0.5 To 1 part of thickener,

1-3 Parts of film forming auxiliary agent

0.5-1 Part of leveling agent.

It can be appreciated that in the raw materials of the functional auxiliary agent, the weight part of the waxy alignment agent is 2-3 parts, including but not limited to: 2 parts, 2.2 parts, 2.5 parts, 2.8 parts and 3 parts; the flash rust inhibitor comprises 1-3 parts by weight of the flash rust inhibitor, including but not limited to: 1 part, 1.5 parts, 2 parts, 2.5 parts and 3 parts; the weight part of the dispersing agent is 1-3 parts, including but not limited to: 1 part, 1.5 parts, 2 parts, 2.5 parts and 3 parts; the defoamer comprises 1-2 parts by weight including but not limited to: 1 part, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts and 2 parts; the weight portion of the thickener is 0.5 to 1 portion, including but not limited to: 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part and 1 part; the film forming auxiliary agent comprises 1-3 parts by weight including but not limited to: 1 part, 1.5 parts, 2 parts, 2.5 parts and 3 parts; the leveling agent comprises 0.5-1 part by weight, including but not limited to: 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part and 1 part.

In some embodiments, the waxy alignment agent comprises one or more of BYK-8421, XH-199, and P2100W.

The waxy alignment agents such as BYK-8421, XH-199 and P2100W are suitable for water-based paint systems, have special hydrogen bond structures, can enable the paint systems to be connected into three-dimensional net thixotropic structures, improve thixotropic indexes of the paint systems, have good anti-sedimentation effect on modified basalt scales, and effectively promote fixation of the modified basalt scales, so that movement and deflection of the modified basalt scales in a film forming process are limited.

In some embodiments, the anti-flash rust agent comprises one or more of HY-79 and R-755.

The anti-flash rust agent such as HY-79 and R-755 is suitable for cationic acidic water-based paint systems, has synergistic effect with anti-rust pigment and filler, can prevent cathode corrosion reaction on the surface of ferrous metal base material, and can also prevent ionization of iron and avoid oxidation of iron by oxygen.

In some embodiments, the dispersant comprises one of F4190, F497, and F493.

In some embodiments, the defoamer comprises one of fields D-80, F298, and F297.

In some embodiments, the thickener comprises one of sodium carboxymethyl cellulose and hydroxyethyl cellulose (e.g., C100).

In some embodiments, the film forming aid comprises dipropylene glycol methyl ether.

In some embodiments, the leveling agent includes one or more of a fluorocarbon modified acrylate-based leveling agent and a silicone-based leveling agent.

Optionally, the fluorocarbon modified acrylate leveling agent comprises GS-1376.

Optionally, the silicone-based leveling agent includes GS-5420.

In some embodiments, the aqueous heavy duty coating has a viscosity of 70ku to 80ku, including but not limited to: 70KU, 71KU, 72KU, 73KU, 74KU, 75KU, 76KU, 77KU, 78KU, 79KU and 80KU. Wherein KU viscosity is a relative viscosity unit developed from Krebs unit viscosity (Krebs unit viscosity) in Japan, and is denoted by the symbol KU.

In some embodiments, the aqueous heavy duty coating has a pH of 7 to 9, including but not limited to: 7. 7.2, 7.5, 7.8, 8, 8.2, 8.5, 8.8 and 9.

In a second aspect of the application, a method for preparing an aqueous heavy duty coating is provided for preparing an aqueous heavy duty coating as described above.

In some embodiments, the method of preparing an aqueous heavy duty coating comprises the steps of:

S10: mixing basalt flakes, graphene, a silane coupling agent and water to prepare first slurry;

S20: carrying out standing treatment and drying treatment on the first slurry to prepare modified basalt flakes;

s30: mixing the modified basalt flakes, water, functional auxiliary agent and carbon titanium cage resin to prepare the water-based heavy-duty coating.

The preparation method of the water-based heavy-duty anticorrosive paint is described in detail in a stepwise manner.

S10: mixing basalt flakes, graphene, a silane coupling agent and water to prepare a first slurry.

Optionally, mixing basalt flakes, graphene, a silane coupling agent, and water, comprising the steps of: adding basalt flakes, graphene, a silane coupling agent and water into a stirring tank, and stirring at a rotating speed of 500-800 rpm for 1-2h to prepare first slurry.

Optionally, the solid content of the first slurry is 60% -70%, including but not limited to: 60%, 62%, 65%, 68% and 70%, further alternatively 60% -65%, still further alternatively 62.5%.

It will be appreciated that the water in step S10 and step S30 each comprises one or more of tap water, deionized water, reverse osmosis water, distilled water, pure water and ultra pure water, further optionally deionized water.

S20: and carrying out standing treatment and drying treatment on the first slurry to prepare the modified basalt flake.

Optionally, the first slurry is subjected to a standing treatment and a drying treatment, including the steps of: and standing the first slurry at 70-100 ℃ for 2-4 hours, and drying at 200-300 ℃ for 4-8 hours.

Optionally, before the drying treatment, the method further comprises the following steps: and stirring the first slurry subjected to the standing treatment at a rotation speed of 500-800 rpm for 10-20 min.

Optionally, mixing the modified basalt flakes, water, functional auxiliary agent and carbon titanium cage resin, comprising the following steps:

S31: mixing the modified basalt flakes, water, a dispersing agent, a film forming additive and a flash rust inhibitor, and stirring for 20-30 min at the rotating speed of 300-500 rpm to prepare second slurry;

S32: mixing the second slurry and the carbon titanium cage resin, and stirring for 20-30 min at a rotation speed of 300-500 rpm to prepare a third slurry;

S33: mixing the third slurry, the waxy alignment agent, the defoaming agent and the leveling agent, and stirring at a rotation speed of 800-1000 rpm for 40-50 min to prepare a fourth slurry;

s34: and adding a thickener into the fourth slurry at a rotating speed of 300-500 rpm, and adjusting the pH to 7-9 to prepare the water-based heavy-duty coating.

Optionally, after adjusting the pH to 7-9, the method further comprises the following steps: filtering with 200 mesh filter cloth.

In a third aspect, the application provides a preparation method of an anti-corrosion coating, which is an application of the aqueous heavy anti-corrosion coating in the heavy anti-corrosion field.

In some embodiments, the method of preparing the corrosion protection coating comprises the steps of:

And (3) coating the aqueous heavy anti-corrosion coating on the surface of the substrate, and performing curing treatment to form the anti-corrosion coating.

Optionally, the conditions of the curing process include: and drying at 100-120 ℃ for 4-6 hours.

Optionally, the thickness of the anti-corrosive coating is 80-200 μm.

Optionally, the impact resistance of the anticorrosive coating is more than or equal to 50kg cm.

In some embodiments, the anti-corrosion coating has a brine tolerance time of greater than or equal to 42 days.

In some embodiments, the neutral salt spray resistance time of the corrosion-resistant coating is greater than or equal to 1000 hours.

The present application will be described in further detail with reference to specific examples.

In the following specific examples and comparative examples, the raw materials used, unless otherwise specified, were all commercially available products; the instruments used, unless otherwise specified, are all commercially available products; the processes used, unless otherwise indicated, are all routine choices for the person skilled in the art. Wherein, the sources of partial raw materials are as follows:

Carbon titanium cage resin: the nano-particle comprises TiO ₂ nano-particles with the particle size of 10-30 nm, and an acrylic acid molecular chain grafted on the TiO ₂ nano-particles, wherein the particle size is 150-200 nm, the number average molecular weight is 61277, the weight average molecular weight is 103665, the VOC content is 25%, and the solid content is 49% +/-1%.

Acrylic resin: selected from the group consisting of the bergamot WX-3200.

Basalt flake: selected from the Suzhou Deltay technique, the ratio of diameter to thickness is 12.

Silane coupling agent: selected from the group consisting of Takangning KH-560.

Graphene: is selected from the six elements of Changzhou, SE1132, and has a radius-thickness ratio of 7600-9500.

Waxy alignment agent: selected from New Yes chemical XH-199.

Flash rust inhibitor: is selected from the wheat chemical HY-79.

Dispersing agent: selected from the group consisting of ona F4190.

Defoaming agent: selected from the field D-80.

And (3) a thickening agent: is selected from Chinese medicine, sodium carboxymethyl cellulose.

Film forming auxiliary agent: selected from Shanghai North, dipropylene glycol methyl ether.

Leveling agent: selected from Shanghai catalpa means ZY-1104.

Example 1

Referring to table 1, the aqueous heavy-duty coating of this embodiment includes the following raw materials in parts by weight:

40 parts of carbon titanium cage resin,

16 Parts of modified basalt flakes,

Deionized water 20 parts, sum

8.5 Parts of functional auxiliary agent;

Wherein, the modified basalt flake comprises the following raw materials in parts by weight:

10 parts of basalt flake,

4 Parts of silane coupling agent, and

2 Parts of graphene;

the functional auxiliary agent comprises the following components in parts by weight:

2 parts of waxy alignment agent,

1 Part of flash rust inhibitor,

2 Parts of dispersing agent,

1 Part of defoaming agent,

0.5 Part of thickener,

Film forming aid 1 part, sum

1 Part of leveling agent.

The preparation method of the aqueous heavy-duty coating of the embodiment comprises the following steps:

(1) Adding basalt flakes, graphene, a silane coupling agent and deionized water into a stirring tank, and stirring for 2 hours at a rotating speed of 500rpm to obtain first slurry;

(2) The first slurry was allowed to stand at 70℃for 4 hours, stirred at 500rpm for 20 minutes, and dried at 200℃for 8 hours to obtain modified basalt flakes.

(3) Adding modified basalt flakes, deionized water, a dispersing agent, a film forming additive and a flash rust inhibitor into a stirring tank, and stirring for 30min at a rotating speed of 300rpm to prepare second slurry; adding carbon titanium cage resin into the second slurry, and stirring for 30min at a rotating speed of 300rpm to prepare a third slurry; adding a waxy directional alignment agent, a defoaming agent and a leveling agent into the third slurry, and stirring for 40min at a rotating speed of 1000rpm to prepare a fourth slurry; and adding a thickening agent into the fourth slurry at a rotating speed of 500rpm, regulating the pH value to 7-9, and then filtering by using 200-mesh filter cloth to obtain the water-based heavy-duty coating.

Examples 2 to 4

The formulations of the aqueous heavy duty coating of examples 2 to 4 are shown in Table 1, and the preparation method is basically the same as that of example 1.

Comparative example 1

The formulation of the aqueous heavy-duty coating of this comparative example is shown in Table 1, and the preparation method thereof is as follows:

(1) Adding carbon titanium cage resin, a silane coupling agent and deionized water into a stirring tank, stirring for 30min at a rotating speed of 300rpm, adding a dispersing agent, a film forming auxiliary agent and a flash rust inhibitor, and continuing stirring for 30min to obtain uniform-dispersion homogeneous prepolymer emulsion;

(2) Adding talcum powder into the homogeneous prepolymer emulsion, stirring for 30min at the rotating speed of 300rpm, adding an antifoaming agent and a leveling agent, and continuously stirring for 30min at the rotating speed of 300rpm to obtain mixed slurry;

(3) And adding a thickening agent into the mixed slurry at a rotating speed of 300rpm, regulating the pH value to 7-9, and then filtering with 200-mesh filter cloth to obtain the water-based heavy-duty coating.

Comparative example 2

This comparative example was prepared in substantially the same manner as in example 4, except that: the carbon titanium cage resin is replaced by acrylic resin with equal mass.

Test case

The above aqueous heavy duty coating was tested as follows and the results are shown in table 2:

(1) Storage state: visual observation of the coating system was made as to whether caking or sedimentation occurred and whether it was homogeneously mixed.

(2) Surface dry time and real dry time: reference is made to the method for determining the drying time of paint films and putty films, GB/T1728-1979 (1989).

(3) Pencil hardness: paint film hardness was determined by reference to GB/T6739-2006 paint and varnish pencil method.

(4) Adhesion force: reference is made to GB/T5210-2006 paint and varnish pull-off test.

(5) Impact resistance: reference is made to GB/T1732-1993 paint film impact resistance assay.

(6) Salt water resistance: the salt water resistance of the ship paint with the paint film hardness is measured by the salt water resistance measuring method and the hot salt water soaking method according to GB/T10834-2008 colored paint and varnish pencil method.

(7) Salt spray resistance: reference is made to GB/T1771-2007 determination of neutral salt spray resistance of paints and varnishes.

As can be seen from Table 2, the aqueous heavy-duty coating of examples 1 to 4 was uniformly mixed with the raw materials, was substantially free of caking and precipitation, and was stable for long-term storage; the surface drying time is 3-4 hours, the actual drying time is 20-24 hours, and the film forming speed is high; the pencil hardness is of the grade of H-3H, the impact resistance is 50 kg/cm-65 kg/cm, and the mechanical property is excellent; the salt-tolerant time reaches 43-55 days, the neutral salt fog-tolerant time reaches 1080-1350 h, and the paint has excellent corrosion resistance and weather resistance.

The modified basalt flakes are replaced by the traditional talcum powder in the comparative example 1, the carbon titanium cage resin is replaced by the traditional acrylic resin in the comparative example 2, and the salt water resistance and the neutral salt fog resistance of the carbon titanium cage resin are obviously deteriorated, so that the combination of the carbon titanium cage resin and the modified basalt flakes plays a synergistic role, and the corrosion resistance and the weather resistance of the water-based heavy-duty coating are greatly improved.

Table 1. Formulation of aqueous heavy duty coating (unit: parts by weight)

TABLE 2 comparison of Properties of aqueous heavy duty coating

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. The scope of the application should, therefore, be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.

Claims

1. The water-based heavy-duty anticorrosive paint is characterized by comprising the following raw materials in parts by weight:

40-60 parts of carbon titanium cage resin,

15-25 Parts of modified basalt flakes,

20-30 Parts of water

7-16 Parts of functional auxiliary agent;

2. The aqueous heavy duty coating of claim 1, wherein the modified basalt flakes comprise the following raw materials in parts by weight:

10-15 parts of basalt flakes,

3-6 Parts of silane coupling agent and

2-4 Parts of graphene.

3. The aqueous heavy duty coating of claim 2, wherein said modified basalt flakes satisfy one or more of the following conditions:

(1) The basalt flakes comprise one or more of olive basalt flakes and perillene basalt flakes;

(2) The diameter-thickness ratio of the basalt flakes is more than or equal to 12;

(3) The graphene comprises one or more of polycrystalline graphene, graphene oxide, graphene nitride and reduced graphene oxide;

(4) The diameter-thickness ratio of the graphene is more than or equal to 2000.

4. The aqueous heavy duty coating of any one of claims 1 to 3, wherein the carbon titanium cage resin meets one or more of the following conditions:

(1) The inorganic nano particles in the carbon titanium cage resin comprise titanium dioxide nano particles;

(2) The carbon titanium cage resin has a number average molecular weight of more than or equal to 60000 and a weight average molecular weight of more than or equal to 100000;

(3) The VOC content of the carbon titanium cage resin is less than or equal to 25 percent;

(4) The solid content of the carbon titanium cage resin is 48% -50%.

5. The aqueous heavy duty coating of any one of claims 1 to 3, wherein the functional auxiliary agent comprises one or more of a waxy alignment agent, a flash rust inhibitor, a dispersant, a defoamer, a thickener, a film forming auxiliary agent, and a leveling agent.

6. The aqueous heavy duty coating of claim 5, wherein the functional auxiliary comprises the following components in parts by weight:

2-3 parts of waxy alignment agent,

1-3 Parts of flash rust inhibitor,

1 To 3 parts of dispersing agent,

1 To 2 parts of defoaming agent,

0.5 To 1 part of thickener,

1-3 Parts of film forming auxiliary agent

0.5-1 Part of leveling agent.

7. The aqueous heavy duty coating of claim 6, wherein said functional auxiliary agent meets one or more of the following conditions:

(1) The waxy alignment agent comprises one or more of BYK-8421, XH-199 and P2100W;

(2) The flash rust inhibitor comprises one or more of HY-79 and R-755;

(3) The leveling agent comprises one or more of fluorocarbon modified acrylic ester leveling agents and organic silicon leveling agents.

8. A method for preparing the aqueous heavy-duty coating according to any one of claims 1 to 7, comprising the steps of:

9. The method for preparing the aqueous heavy duty coating according to claim 8, wherein the first slurry is subjected to a standing treatment and a drying treatment, comprising the steps of:

10. The method for preparing the aqueous heavy duty coating of claim 8, wherein the step of mixing the modified basalt flakes, water, functional auxiliary agent and carbon titanium cage resin comprises the steps of: