CN112143269B - Water-based inorganic zinc-rich coating and preparation method thereof - Google Patents
Water-based inorganic zinc-rich coating and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a water-based inorganic zinc-rich coating and a preparation method thereof, wherein the preparation method comprises the following steps: 15-30 parts of silicon powder, 5-10 parts of potassium hydroxide, 20-40 parts of deionized water, 2-3 parts of dodecyl trimethyl ammonium bromide, 6-9 parts of silicone-acrylic emulsion, 30-50 parts of flaky zinc powder, 20-40 parts of spherical zinc powder, 0.5-0.7 part of silane coupling agent, 1-3 parts of graphene oxide, 4-7 parts of film-forming assistant, 6-8 parts of wetting assistant and 1-2 parts of defoaming agent. The preparation method of the water-based inorganic zinc-rich coating comprises the following steps: preparing a base material; preparing three-dimensional cluster/reticular zinc powder pigment subjected to certain chemical modification and activation treatment; adding the three-dimensional cluster/reticular zinc powder pigment into the base material, adding the auxiliary agent, and uniformly mixing to obtain the water-based inorganic zinc-rich coating. The invention provides a water-based inorganic zinc-rich paint and a preparation method thereof, and aims to solve the problems of uneven zinc powder dispersion, easy sedimentation, easy corrosion and quick failure in the existing water-based inorganic zinc-rich paint.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a water-based inorganic zinc-rich coating and a preparation method thereof.
Background
Along with the enhancement of the environmental protection of the national sustainable development strategy, the appearance of the environment-friendly coating points the direction for the development of the coating industry. The water-based inorganic zinc-rich coating can provide green guarantee for industry due to zero VOC (volatile organic compounds) emission and has strong self-repairing capability. In recent years, the research level in the field of waterborne inorganic zinc-rich anticorrosive coatings at home and abroad has a great progress, and the coating is successfully applied in many fields such as industrial production, oceans and the like, such as long-term corrosion prevention of metal structural members such as crude oil storage tanks, bridges of offshore steel structures, oil extraction platforms, containers and the like.
The water-based inorganic zinc-rich paint mainly comprises a silicate base stock and a zinc powder pigment, wherein the zinc powder occupies most of the volume after the coating is dried, and as a typical sacrificial paint, the anticorrosion mechanism is as follows: the cathode protection of zinc powder is utilized in the early stage, zinc salt generated by corrosion of the zinc powder is utilized in the later stage to gradually block the gaps of the coating to generate shielding, and the property of the visible pigment plays a very key role in the anti-corrosion performance of the coating.
The pigment of the water-based inorganic zinc-rich coating is mainly flaky zinc powder, and the pigment has the advantages of strong floating capacity, covering capacity, shielding effect and the like, which are paid attention to by people, however, the flaky zinc powder has poor dispersibility and poor compatibility with a matrix in the water-based inorganic zinc-rich coating, and fine pores exist among layers and cannot be filled. And because the zinc powder is more active and can be sacrificed too quickly due to corrosion, the coating can not obtain long-acting protection, and in addition, the zinc powder in the coating is not uniformly dispersed and is easy to settle, so that the coating has poor adhesive force, short antirust life and quick failure.
Disclosure of Invention
In view of the above, the invention provides a water-based inorganic zinc-rich paint and a preparation method thereof, aiming at solving the problems of uneven zinc powder dispersion, easy sedimentation, easy corrosion and quick failure in the existing water-based inorganic zinc-rich paint.
The invention provides a specific technical scheme that: an aqueous inorganic zinc-rich coating comprising:
15-30 parts of silicon powder, 5-10 parts of potassium hydroxide, 20-40 parts of deionized water, 2-3 parts of dodecyl trimethyl ammonium bromide, 6-9 parts of silicone-acrylic emulsion, 30-50 parts of flaky zinc powder, 20-40 parts of spherical zinc powder, 0.5-0.7 part of silane coupling agent, 1-3 parts of graphene oxide, 4-7 parts of film-forming assistant, 6-8 parts of wetting assistant and 1-2 parts of defoaming agent.
Preferably, the silane coupling agent is a nonionic anionic alkoxy polyether silane coupling agent developed from modified polyethers.
Preferably, the fineness of the flaky zinc powder is 500-800 meshes, and/or the fineness of the spherical zinc powder is 200-400 meshes.
Preferably, the wetting assistant is a high-efficiency organosilicon surfactant developed by a hydrosilylation reaction of heptamethyltrisiloxane, and the wetting angle of the wetting assistant is larger than 90 degrees.
The invention also provides another specific technical scheme as follows: a preparation method of a water-based inorganic zinc-rich coating comprises the following steps:
preparing a base material;
preparing three-dimensional cluster/reticular zinc powder pigment subjected to certain chemical modification and activation treatment;
and adding the three-dimensional cluster/reticular zinc powder pigment into the base material, adding an auxiliary agent, and uniformly mixing to obtain the water-based inorganic zinc-rich coating.
Preferably, the preparing the base stock comprises the steps of:
preparing a potassium silicate aqueous solution;
and sequentially adding the silicone-acrylic emulsion, the potassium hydroxide and the deionized water into the potassium silicate aqueous solution, and stirring and reacting at normal temperature for 30-60 min to obtain the base material with strong water resistance.
Preferably, the process for preparing the aqueous potassium silicate solution is:
mixing silicon powder with potassium hydroxide, deionized water and dodecyl trimethyl ammonium bromide, uniformly stirring, placing the mixture into a reaction kettle, reacting for 12-48 hours in an oven at the temperature of 130-200 ℃, taking out, naturally cooling to room temperature, and filtering to obtain the potassium silicate aqueous solution.
Preferably, the process for preparing the three-dimensional cluster/reticular zinc powder pigment subjected to certain chemical modification and activation treatment comprises the following steps:
mixing flake zinc powder, spherical zinc powder and graphene oxide into deionized water, respectively dropwise adding a silane coupling agent with the molecular weight of 500-3000 into the deionized water, controlling the dropwise adding speed to be 0.3-1.5 ml/min, adjusting the pH value to be 3-6, carrying out acidification treatment, carrying out ultrasonic and mechanical stirring at room temperature, controlling the rotating speed of the mechanical stirring to be 300-700 r/min and the time to be 30-50 min, then reacting at 50-80 ℃ for 4-8 h, washing the product for 3-5 times by using the deionized water and absolute ethyl alcohol after the reaction is finished, and carrying out centrifugal drying and sieving to obtain the three-dimensional cluster/mesh zinc powder pigment subjected to certain chemical modification activation treatment.
Preferably, the fineness of the flaky zinc powder is 500-800 meshes, and/or the fineness of the spherical zinc powder is 200-400 meshes, and/or the silane coupling agent is a nonionic anionic alkoxy polyether silane coupling agent developed from modified polyether.
Preferably, the addition agent comprises a film-forming addition agent, a wetting addition agent and a defoaming agent, wherein the wetting addition agent is a high-efficiency organic silicon surfactant developed by a hydrosilylation reaction of heptamethyltrisiloxane, and the wetting angle of the wetting addition agent is larger than 90 degrees.
Compared with the prior art, the water-based inorganic zinc-rich coating and the preparation method thereof have the following beneficial effects:
(1) the zinc powder pigment has good compatibility with a base material after the structure is improved, and overcomes the defects of uneven dispersion and over-quick sacrifice of the currently used zinc powder. The zinc powder pigment with the three-dimensional cluster/network structure shown by the microscopic morphology enables pores among zinc powder to be effectively filled, the zinc powder pigment has high density, does not settle after being dispersed in a base material and standing for 13 months, has a water contact angle of 147.3 degrees on the surface of a paint film, is not easily wetted by a corrosive medium, achieves a certain shielding effect, and has no bubbling, cracking or rust spots on the surface of the paint film after being continuously soaked in water for 3000 hours. The free energy of the solid surface calculated by the Young equation is as low as 3.87mN/m, and the solid surface has super surface activity.
(2) The water-based inorganic zinc-rich coating is simple and convenient to operate and easy to coat, can finish autonomous film forming within 13min, can be completely dried and cured under the condition of natural air drying within 15h, greatly saves the construction time, has flat, smooth and uniform surface of a paint film, has the first-grade adhesive force, the impact strength of more than 50kg cm, the salt spray resistance of more than 4000h, can obviously improve the corrosion resistance by 18.3 percent compared with the existing water-based inorganic zinc-rich coating on the market, and realizes the aims of environmental friendliness and strong comprehensive performance.
(3) The silicon powder adopted by the invention can be waste silicon powder, and the waste silicon powder is used as the raw material to prepare the base material, so that the problem of environmental pollution caused by industrial wastes is solved, and the sustainable development is realized.
(4) The silane coupling agent and the wetting assistant used in the invention are modified, and can be adjusted in structure according to the performance requirements of specific construction application to the paint film to achieve performance optimization.
(5) The preparation method has the advantages of simple preparation process, easy obtainment of the method, low cost of raw materials, strong applicability and realization of industrial production.
Drawings
FIG. 1 is a graph of the wetting effect of the surface of the coating of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the present invention and should not be construed as limiting the present invention, and all other embodiments that can be obtained by one skilled in the art based on the embodiments of the present invention without inventive efforts shall fall within the scope of protection of the present invention.
Example 1
The invention exemplarily provides a water-based inorganic zinc-rich coating, which comprises: 15-30 parts of silicon powder, 5-10 parts of potassium hydroxide, 20-40 parts of deionized water, 2-3 parts of dodecyl trimethyl ammonium bromide, 6-9 parts of silicone acrylic emulsion, 30-50 parts of flaky zinc powder, 20-40 parts of spherical zinc powder, 0.5-0.7 part of silane coupling agent, 1-3 parts of graphene oxide, 4-7 parts of film-forming assistant, 6-8 parts of wetting assistant and 1-2 parts of defoaming agent.
In order to fully recycle the industrial leftovers, the silicon powder provided by the embodiment of the invention can be waste silicon powder, the waste silicon powder is the industrial leftovers with the fineness of 1000 meshes, and the use of the waste silicon powder can save the cost, reduce the environmental pollution, and is safe and environment-friendly.
The silane coupling agent of the embodiment of the invention can be selected from the existing common silane coupling agents with coupling effect. However, in order to further improve the adhesion of the coating, the silane coupling agent adopted by the invention is a nonionic anionic alkoxy polyether silane coupling agent developed from modified polyether.
The base material of the water-based inorganic zinc-rich paint mainly comprises silicate aqueous solution, and when the paint is formed into a film, Si-O bonds, zinc powder, iron elements on the surface of steel and the like are generated into silicate polymers through the coupling reaction of a silane coupling agent. Therefore, in the embodiment of the invention, an active chain with an alkoxy group is introduced to the silane coupling agent through hydrosilylation, and the ring opening of an epoxy group is carried out to synthesize the coupling agent carrying the nonionic anionic active group. Illustratively, the silane coupling agent is synthesized by a hydrosilylation reaction with trimethoxysilylhydride and a ring-opening reaction of the epoxy group to introduce a functional group to the silane coupling agentA coupling agent of an anionic active group. The silane coupling agent has the performance of a surfactant besides the coupling performance, and can reduce the surface tension to 33.8 mN.m-1Therefore, the prepared water-based inorganic zinc-rich coating has strong adhesion, low energy state, better compatibility with a matrix and difficult shedding. Preferably, the molecular weight of the nonionic anionic alkoxy polyether silane coupling agent is 500-3000. Preferably, the molecular weight is 1000, 1200 and 1500, and the surface treatment and the surface activity of the material can be compatible.
The flaky zinc powder provided by the embodiment of the invention is commercially available flaky zinc powder, and the fineness of the flaky zinc powder is 500-800 meshes. The spherical zinc powder is commercially available spherical zinc powder, and the fineness of the spherical zinc powder is 200-400 meshes.
The graphene oxide of the embodiment of the invention is a commercial product, has the fineness of 250nm and the thickness of a monoatomic layer, can fill the defects of a coating, reduce the porosity, effectively reduce the internal stress of the coating, and improve the flexibility, the impact resistance and the wear resistance of the coating.
The film-forming additive provided by the embodiment of the invention is a product prepared by taking alcohol ester as a main raw material, and adding a dispersant and a thickening agent through process optimization.
The wetting auxiliary agent in the embodiment of the invention can be selected from the wetting auxiliary agent in the prior art, but in view of the fact that the wetting auxiliary agent in the prior art can only reduce the surface tension of water to about 30N/m, generally, the smaller the surface tension of the wetting auxiliary agent is, the better the wetting property is, in order to reduce the surface tension of the wetting auxiliary agent, the wetting auxiliary agent in the embodiment of the invention is an efficient organic silicon surfactant developed by heptamethyltrisiloxane through hydrosilylation, the wetting angle of the wetting auxiliary agent is larger than 90 degrees, the surface tension of the wetting auxiliary agent is as low as 20N/m, the wetting auxiliary agent can be rapidly wetted and spread on a low-energy hydrophobic interface, the viscosity of a pigment system is reduced, the adhesive force of a paint film to a substrate is improved, the good hydrophobicity of the water-based inorganic zinc-rich paint can be met, the drying speed is fast, the sagging is not easy to corrode in the environment, and the bubbling is not easy to occur after the water immersion.
The defoaming agent provided by the embodiment of the invention is a commercially available product which takes an emulsifier and hydrophobic silicon dioxide as main raw materials.
Example 2
The embodiment of the invention provides a preparation method of a water-based inorganic zinc-rich coating based on the water-based inorganic zinc-rich coating in the embodiment 1, which comprises the following steps:
s21, preparing a base material.
Specifically, the preparation of the base stock comprises the following steps:
s211, preparing a potassium silicate aqueous solution; wherein, the process for preparing the potassium silicate aqueous solution comprises the following steps:
mixing silicon powder with potassium hydroxide, deionized water and dodecyl trimethyl ammonium bromide, uniformly stirring, placing the mixture into a reaction kettle, reacting for 12-48 hours in an oven at the temperature of 130-200 ℃, taking out, naturally cooling to room temperature, and filtering to obtain the potassium silicate aqueous solution.
S212, sequentially adding the silicone-acrylic emulsion, the potassium hydroxide and the deionized water into the potassium silicate aqueous solution, and stirring and reacting at normal temperature for 30-60 min to obtain the base material with strong water resistance.
S22, preparing the three-dimensional cluster/reticular zinc powder pigment which is subjected to certain chemical modification and activation treatment.
Specifically, the process for preparing the three-dimensional cluster/reticular zinc powder pigment subjected to certain chemical modification and activation treatment comprises the following steps:
mixing flake zinc powder, spherical zinc powder and graphene oxide into deionized water, respectively dropwise adding a silane coupling agent with the molecular weight of 500-3000 into the deionized water, controlling the dropwise adding speed to be 0.3-1.5 ml/min, adjusting the pH value to be 3-6, carrying out acidification treatment, carrying out ultrasonic and mechanical stirring at room temperature, controlling the rotating speed of the mechanical stirring to be 300-700 r/min and the time to be 30-50 min, then reacting at 50-80 ℃ for 4-8 h, washing the product for 3-5 times by using the deionized water and absolute ethyl alcohol after the reaction is finished, and carrying out centrifugal drying and sieving to obtain the three-dimensional cluster/mesh zinc powder pigment subjected to certain chemical modification activation treatment. The fineness of the flaky zinc powder is 500-800 meshes, the fineness of the spherical zinc powder is 200-400 meshes, the silane coupling agent is a nonionic alkoxy polyether silane coupling agent developed from modified polyether, and the molecular weight of the silane coupling agent can be selected from 1000, 1200 and 1500.
S23, adding the three-dimensional cluster/reticular zinc powder pigment in the step S22 into the base material prepared in the step S21, adding an auxiliary agent, and uniformly mixing to obtain the water-based inorganic zinc-rich coating.
Specifically, the addition agent comprises a film-forming addition agent, a wetting addition agent and a defoaming agent, wherein the wetting addition agent is a high-efficiency organic silicon surfactant developed by heptamethyltrisiloxane through a hydrosilylation reaction, the wetting angle of the wetting addition agent is larger than 90 degrees, and the surface tension of the wetting addition agent is as low as 20N/m.
Example 3
The preparation method in example 2 is adopted for preparation in this example, and specifically includes the following steps:
s31, preparing a base material; the method specifically comprises the following steps:
s311, mixing 15-20 parts of waste silicon powder with 5-7 parts of potassium hydroxide, 20-25 parts of deionized water and 2-3 parts of dodecyl trimethyl ammonium bromide, uniformly stirring, placing in a reaction kettle, reacting in an oven at 130-150 ℃ for 12-24 hours, taking out, naturally cooling to room temperature, and filtering to obtain a mixed solution;
s312, adding the silicone-acrylic emulsion, the potassium hydroxide and the deionized water into the mixed solution prepared in the step S311, and stirring and reacting at normal temperature for 50min to obtain a base material with strong water resistance;
s32, mixing the flaky zinc powder, the spherical zinc powder and the graphene oxide into deionized water, and respectively dropwise adding nonionic alkoxy polyether silane coupling agents with the molecular weights of 1000, 1200 and 1500 into the deionized water, wherein the dropwise adding speed is controlled to be 0.3-0.4 ml/min; adjusting the pH value to 3-5 for acidification treatment, performing ultrasonic and mechanical stirring at room temperature, wherein the rotating speed of the mechanical stirring is 300-400 r/min, and the time is 30-40 min; then reacting for 4-5 h at 50-60 ℃, washing the product for 3-4 times by using deionized water and absolute ethyl alcohol after the reaction is finished, centrifugally drying, and sieving to obtain a three-dimensional cluster/mesh zinc powder pigment subjected to certain chemical modification and activation treatment;
s33, adding the pigment prepared in the step S32 into the base material prepared in the step S31, adding a film-forming aid, a wetting aid and a defoaming agent, and uniformly mixing to obtain a coating finished product.
The test results of the water-based inorganic zinc-rich paint prepared in this example are shown in table 1 below.
TABLE 1
Example 4
The preparation method in example 2 is adopted for preparation in this example, and specifically includes the following steps:
s41, preparing a base material; the method specifically comprises the following steps:
s411, mixing 20-25 parts of waste silicon powder with 7-8 parts of potassium hydroxide, 25-30 parts of deionized water and 2-3 parts of dodecyl trimethyl ammonium bromide, uniformly stirring, placing in a reaction kettle, reacting in an oven at 140-170 ℃ for 12-24 hours, taking out, naturally cooling to room temperature, and filtering to obtain a mixed solution;
s412, adding the silicone-acrylic emulsion, potassium hydroxide and deionized water into the mixed solution prepared in the step S411, and stirring and reacting at normal temperature for 50min to obtain a base material with strong water resistance;
s42, mixing the flaky zinc powder, the spherical zinc powder and the graphene oxide into deionized water, and respectively dropwise adding nonionic alkoxy polyether silane coupling agents with the molecular weights of 1000, 1200 and 1500 into the deionized water, wherein the dropwise adding speed is controlled to be 0.3-0.4 ml/min; adjusting the pH value to 5-6 for acidification treatment, performing ultrasonic and mechanical stirring at room temperature, wherein the rotating speed of the mechanical stirring is 400-500 r/min, and the time is 40-50 min; then reacting for 5-6 h at 60-70 ℃, washing the product for 4-5 times by using deionized water and absolute ethyl alcohol after the reaction is finished, centrifugally drying, and sieving to obtain a three-dimensional cluster/mesh zinc powder pigment subjected to certain chemical modification and activation treatment;
s43, adding the pigment prepared in the step S42 into the base material prepared in the step S41, adding a film-forming aid, a wetting aid and a defoaming agent, and uniformly mixing to obtain a coating finished product.
The test results of the water-based inorganic zinc-rich paint prepared in this example are shown in table 2 below. Combining table 2 with fig. 1, the water contact angle α on the paint film surface of this example is 147.3 °.
TABLE 2
Example 5
The preparation method in example 2 is adopted for preparation in this example, and specifically includes the following steps:
s51, preparing a base material; the method specifically comprises the following steps:
s511, mixing 25-30 parts of waste silicon powder with 8-10 parts of potassium hydroxide, 30-40 parts of deionized water and 2-3 parts of dodecyl trimethyl ammonium bromide, uniformly stirring, placing in a reaction kettle, reacting in an oven at 170-200 ℃ for 24-48 h, taking out, naturally cooling to room temperature, and filtering to obtain a mixed solution;
s512, adding the silicone-acrylic emulsion, the potassium hydroxide and the deionized water into the mixed solution prepared in the step S511, and stirring and reacting at normal temperature for 50min to obtain a base material with strong water resistance;
s52, mixing the flaky zinc powder, the spherical zinc powder and the graphene oxide into deionized water, and respectively dropwise adding nonionic alkoxy polyether silane coupling agents with the molecular weights of 1000, 1200 and 1500 into the deionized water, wherein the dropwise adding speed is controlled to be 0.4-0.5 ml/min; adjusting the pH value to be 5-6, carrying out acidification treatment, carrying out ultrasonic and mechanical stirring at room temperature, wherein the rotating speed of the mechanical stirring is 500-700 r/min, and the time is 40-50 min; then reacting for 6-8 h at 70-80 ℃, washing the product with deionized water and absolute ethyl alcohol for 5-8 times after the reaction is finished, centrifugally drying, and sieving to obtain a three-dimensional cluster/reticular zinc powder pigment subjected to certain chemical modification and activation treatment;
s53, adding the pigment prepared in the step S52 into the base material prepared in the step S51, adding a film-forming aid, a wetting aid and a defoaming agent, and uniformly mixing to obtain a coating finished product.
The test results of the water-based inorganic zinc-rich paint prepared in this example are shown in table 3 below.
TABLE 3
The water-based inorganic zinc-rich coating and the preparation method thereof have the following beneficial effects:
(1) the zinc powder pigment has good compatibility with a base material after the structure is improved, and overcomes the defects of uneven dispersion and over-quick sacrifice of the currently used zinc powder. The microscopic morphology shows that the zinc powder pigment with a three-dimensional cluster/network structure enables pores among zinc powder to be effectively filled, the zinc powder pigment has high density, does not settle after being dispersed in a base material and placed still for 13 months, has a water contact angle of 147.3 degrees on the surface of a paint film, is not easy to be wetted by corrosive media so as to achieve a certain shielding effect, and can be continuously soaked in water for 3000 hours, so that the surface of the paint film has no bubbling, cracking and rust spots. The free energy of the solid surface calculated by the Young equation is as low as 3.87mN/m, and the solid surface has super surface activity.
(2) The water-based inorganic zinc-rich coating is simple and convenient to operate and easy to coat, can finish autonomous film forming within 13min, can be completely dried and cured under the condition of natural air drying within 15h, greatly saves the construction time, has flat, smooth and uniform surface of a paint film, has the first-grade adhesive force, the impact strength of more than 50kg cm, the salt spray resistance of more than 4000h, can obviously improve the corrosion resistance by 18.3 percent compared with the existing water-based inorganic zinc-rich coating on the market, and realizes the aims of environmental friendliness and strong comprehensive performance.
(3) The silicon powder adopted by the invention can be waste silicon powder, and the waste silicon powder is used as the raw material to prepare the base material, so that the problem of environmental pollution caused by industrial wastes is solved, and the sustainable development is realized.
(4) The silane coupling agent and the wetting assistant used in the invention are modified, and can be adjusted in structure according to the performance requirements of specific construction application to the paint film to achieve performance optimization.
(5) The preparation method has the advantages of simple preparation process, easy obtainment of the method, low cost of raw materials, strong applicability and realization of industrial production.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, which are directly or indirectly applied to the present invention, are included in the scope of the present invention.
Claims (9)
1. The water-based inorganic zinc-rich coating is characterized by comprising the following raw materials:
15-30 parts of silicon powder, 5-10 parts of potassium hydroxide, 20-40 parts of deionized water, 2-3 parts of dodecyl trimethyl ammonium bromide, 6-9 parts of silicone-acrylic emulsion, 30-50 parts of flaky zinc powder, 20-40 parts of spherical zinc powder, 0.5-0.7 part of silane coupling agent, 1-3 parts of graphene oxide, 4-7 parts of film-forming assistant, 6-8 parts of wetting assistant and 1-2 parts of defoaming agent;
the fineness of the flaky zinc powder is 500-800 meshes, and/or the fineness of the spherical zinc powder is 200-400 meshes;
the preparation method of the coating comprises the following steps:
preparing a base material;
preparing three-dimensional cluster/reticular zinc powder pigment subjected to certain chemical modification and activation treatment;
adding the three-dimensional cluster/reticular zinc powder pigment into the base material, adding an auxiliary agent, and uniformly mixing to obtain the water-based inorganic zinc-rich coating;
the preparation of the base stock comprises the following steps:
preparing a potassium silicate aqueous solution;
sequentially adding silicone-acrylic emulsion, potassium hydroxide and deionized water into the potassium silicate aqueous solution, and stirring and reacting at normal temperature for 30-60 min to obtain a base material with strong water resistance;
the process for preparing the potassium silicate aqueous solution comprises the following steps:
mixing silicon powder with potassium hydroxide, deionized water and dodecyl trimethyl ammonium bromide, uniformly stirring, placing into a reaction kettle, reacting in an oven at 130-200 ℃ for 12-48 h, taking out, naturally cooling to room temperature, and filtering to obtain the potassium silicate aqueous solution;
the process for preparing the three-dimensional cluster/reticular zinc powder pigment subjected to certain chemical modification and activation treatment comprises the following steps:
mixing flake zinc powder, spherical zinc powder and graphene oxide into deionized water, respectively dropwise adding a silane coupling agent with the molecular weight of 500-3000 into the deionized water, controlling the dropwise adding speed to be 0.3-1.5 ml/min, adjusting the pH value to be 3-6, carrying out acidification treatment, carrying out ultrasonic and mechanical stirring at room temperature, controlling the rotating speed of the mechanical stirring to be 300-700 r/min and the time to be 30-50 min, then reacting at 50-80 ℃ for 4-8 h, washing the product for 3-5 times by using the deionized water and absolute ethyl alcohol after the reaction is finished, and carrying out centrifugal drying and sieving to obtain the three-dimensional cluster/mesh zinc powder pigment subjected to certain chemical modification activation treatment.
2. The aqueous inorganic zinc-rich coating of claim 1, wherein the silane coupling agent is a nonionic anionic alkoxy polyether silane coupling agent developed from a modified polyether.
3. The aqueous inorganic zinc-rich coating of claim 1, wherein the wetting aid is a high efficiency silicone surfactant developed from heptamethyltrisiloxane via a hydrosilylation reaction, the wetting aid having a wetting angle greater than 90 °.
4. The preparation method of the water-based inorganic zinc-rich coating according to any one of claims 1 to 3, characterized by comprising the steps of:
preparing a base material;
preparing three-dimensional cluster/reticular zinc powder pigment subjected to certain chemical modification and activation treatment;
and adding the three-dimensional cluster/reticular zinc powder pigment into the base material, adding an auxiliary agent, and uniformly mixing to obtain the water-based inorganic zinc-rich coating.
5. The method for preparing the water-based inorganic zinc-rich paint according to claim 4, wherein the preparing the binder comprises the following steps:
preparing a potassium silicate aqueous solution;
and sequentially adding the silicone-acrylic emulsion, the potassium hydroxide and the deionized water into the potassium silicate aqueous solution, and stirring and reacting at normal temperature for 30-60 min to obtain the base material with strong water resistance.
6. The method for preparing the water-based inorganic zinc-rich paint according to claim 5, wherein the process for preparing the potassium silicate aqueous solution is as follows:
mixing silicon powder with potassium hydroxide, deionized water and dodecyl trimethyl ammonium bromide, uniformly stirring, placing in a reaction kettle, reacting in an oven at 130-200 ℃ for 12-48 h, taking out, naturally cooling to room temperature, and filtering to obtain the potassium silicate aqueous solution.
7. The preparation method of the water-based inorganic zinc-rich paint as claimed in any one of claims 4 to 6, wherein the process for preparing the chemically modified and activated three-dimensional cluster/mesh zinc powder pigment comprises the following steps:
mixing flake zinc powder, spherical zinc powder and graphene oxide into deionized water, respectively dropwise adding a silane coupling agent with the molecular weight of 500-3000 into the deionized water, controlling the dropwise adding speed to be 0.3-1.5 ml/min, adjusting the pH value to be 3-6, carrying out acidification treatment, carrying out ultrasonic and mechanical stirring at room temperature, controlling the rotating speed of the mechanical stirring to be 300-700 r/min and the time to be 30-50 min, then reacting at 50-80 ℃ for 4-8 h, washing the product for 3-5 times by using the deionized water and absolute ethyl alcohol after the reaction is finished, and carrying out centrifugal drying and sieving to obtain the three-dimensional cluster/mesh zinc powder pigment subjected to certain chemical modification activation treatment.
8. The preparation method of the water-based inorganic zinc-rich coating as claimed in claim 7, wherein the flake zinc powder has a fineness of 500-800 meshes, and/or the spherical zinc powder has a fineness of 200-400 meshes, and/or the silane coupling agent is a nonionic anionic alkoxy polyether silane coupling agent developed from modified polyether.
9. The method for preparing the water-based inorganic zinc-rich coating according to any one of claims 4 to 6, wherein the addition of the auxiliary agent comprises a film-forming auxiliary agent, a wetting auxiliary agent and a defoaming agent, wherein the wetting auxiliary agent is a high-efficiency organosilicon surfactant developed by a hydrosilylation reaction of heptamethyltrisiloxane, and the wetting angle of the wetting auxiliary agent is greater than 90 °.
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| CN114381160B (en) * | 2022-01-25 | 2023-02-10 | 北京国电富通科技发展有限责任公司 | Modified graphene oxide, preparation method thereof and coating |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5686012A (en) * | 1994-09-01 | 1997-11-11 | Toda Kogyo Corporation | Modified particles |
| CN1824689A (en) * | 2006-02-17 | 2006-08-30 | 浙江大学 | Synthesis method of silicane coupling agent having long chain polyether chain section |
| CN101070380A (en) * | 2007-05-10 | 2007-11-14 | 浙江大学 | Long-chain polyether type silane coupler of glycidol-ether-radical end-capping |
| CN102225947A (en) * | 2011-04-29 | 2011-10-26 | 南通德益化工有限公司 | Preparation method of polyether modified siloxane |
| CN105086529A (en) * | 2015-08-05 | 2015-11-25 | 深圳市保利特新材料有限公司 | Environment-friendly water-based ceramic base anticorrosion material |
| CN110527329A (en) * | 2019-08-08 | 2019-12-03 | 深圳航天科技创新研究院 | A kind of anti-algae zinc-rich anti-corrosive paint of inorganic graphite alkene antibacterial and preparation method thereof |
-
2020
- 2020-09-07 CN CN202010929172.2A patent/CN112143269B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5686012A (en) * | 1994-09-01 | 1997-11-11 | Toda Kogyo Corporation | Modified particles |
| CN1824689A (en) * | 2006-02-17 | 2006-08-30 | 浙江大学 | Synthesis method of silicane coupling agent having long chain polyether chain section |
| CN101070380A (en) * | 2007-05-10 | 2007-11-14 | 浙江大学 | Long-chain polyether type silane coupler of glycidol-ether-radical end-capping |
| CN102225947A (en) * | 2011-04-29 | 2011-10-26 | 南通德益化工有限公司 | Preparation method of polyether modified siloxane |
| CN105086529A (en) * | 2015-08-05 | 2015-11-25 | 深圳市保利特新材料有限公司 | Environment-friendly water-based ceramic base anticorrosion material |
| CN110527329A (en) * | 2019-08-08 | 2019-12-03 | 深圳航天科技创新研究院 | A kind of anti-algae zinc-rich anti-corrosive paint of inorganic graphite alkene antibacterial and preparation method thereof |
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