CN111334097A - High-performance water-based high-temperature-resistant coating and preparation method thereof - Google Patents
High-performance water-based high-temperature-resistant coating and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a high-performance water-based high-temperature-resistant coating and a preparation method thereof, belonging to the technical field of water-based coatings. Comprises the following components in parts by weight: 40-70 parts of high-temperature-resistant emulsion, 0.05-0.3 part of organic silicon defoamer, 0.07-1.5 parts of amine neutralizer, 0.2-5 parts of silane coupling agent, 0.08-1.5 parts of base material wetting agent, 1-15 parts of film-forming assistant, 0.5-8 parts of pigment, 15-40 parts of filler, 6-30 parts of distilled water I, 0.1-5 parts of thickening agent and 0.1-5 parts of distilled water II. The high-performance water-based high-temperature-resistant coating disclosed by the invention has excellent mechanical properties such as adhesion, flexibility, hardness and impact resistance; the water resistance, the salt spray resistance and the acid and alkali resistance are excellent; the high-temperature resistant performance is very high, and the cold and heat cycle resistance is particularly outstanding; the preparation method is simple, convenient to operate, capable of saving production cost, manpower and material resources and convenient for industrial production, and the produced water-based paint is a non-toxic, harmless, green and environment-friendly product.
Description
Technical Field
The invention belongs to the technical field of water-based paint, and particularly relates to high-performance water-based high-temperature-resistant paint and a preparation method thereof.
Background
The water-based high-temperature resistant coating belongs to one of water-based functional coatings, can be coated on the surfaces of various metal plate-shaped structures, can bear the temperature of more than 200 ℃ for a long time, and can keep certain physical and chemical properties, so that a protected object can normally play a role in a high-temperature environment. Since the industrial production of organosilicon in the fortieth years, the high-temperature resistant coating prepared by the product is widely applied to the insulation of high-temperature motors and electric appliances. At present, more researches on oily baking-dry high-temperature-resistant coatings are reported, but few reports are made on environment-friendly water-based high-temperature-resistant coatings for improving mechanical properties such as water resistance, acid resistance, alkali resistance, flexibility and the like of coating films.
Disclosure of Invention
Aiming at the problem that the high-temperature resistant paint in the prior art is mostly oil-based paint, the invention provides high-performance water-based high-temperature resistant paint and a preparation method thereof, so as to solve the problem. According to the invention, a water-soluble nano active silanol modified organic silicon emulsion is adopted, Si-O-Si bonds of organic silicon in the emulsion can be fused and fused with Fe in a base material at high temperature to generate a Si-0-Fe silicate inorganic compound coating, and the adhesive force to an iron-based base material is strong; and meanwhile, the paint can also react with a small amount of hydroxyl in silicate fillers (mica powder, mica iron oxide, talcum powder and kaolin) in the paint, so that the heat resistance is improved. At high temperatures, silicates can react with silicones, sintering into dense film-forming materials.
The technical scheme of the invention is as follows:
the high-performance water-based high-temperature-resistant coating comprises the following components in parts by weight: 40-70 parts of high-temperature-resistant emulsion, 0.05-0.3 part of organic silicon defoamer, 0.07-1.5 parts of amine neutralizer, 0.2-5 parts of silane coupling agent, 0.08-1.5 parts of base material wetting agent, 1-15 parts of film-forming assistant, 0.5-8 parts of pigment, 15-40 parts of filler, 6-30 parts of distilled water I, 0.1-5 parts of thickening agent and 0.1-5 parts of distilled water II.
Preferably, the composition comprises the following components in parts by weight: 65 parts of high-temperature-resistant emulsion, 0.15 part of organic silicon defoamer, 0.5 part of amine neutralizer, 1.8 parts of silane coupling agent, 0.8 part of base material wetting agent, 5 parts of film-forming assistant, 6 parts of pigment, 25 parts of filler, 18 parts of distilled water I, 3 parts of thickener and 3 parts of distilled water II.
Preferably, the high-temperature-resistant emulsion is a water-soluble nano active silanol modified organic silicon emulsion, and the pH value is 7.0-11.0. The specific model is 83680 Kaisley of Hunan. The high-temperature resistant emulsion contains Si-O-Si bonds, can be fused with Fe in a base material at high temperature to generate a Si-0-Fe silicate inorganic compound coating, and has strong adhesive force to an iron-based base material. And simultaneously can react with a small amount of hydroxyl in silicate fillers (such as mica powder, micaceous iron oxide, talcum powder and kaolin) in the coating to form a cross-linked polymer so as to improve the heat resistance. At high temperatures, silicates can react with silicones, sintering into dense film-forming materials.
Preferably, the specific model of the water-based silicone defoaming agent is HF3206, and the product has the advantages of excellent defoaming performance and good compatibility with silicone resin.
Preferably, the specific model of the amine neutralizing agent is DeuAdd MA-95, and the amine neutralizing agent has the advantages of low odor and volatility, can effectively adjust the pH value of a system, and endows the system with good pH value stability.
Preferably, the silane coupling agent, specifically type KH560, advantageously reacts with many different types of organic polymers to improve the adhesion of organic resins to inorganic surfaces. Meanwhile, the wetting and dispersing properties of the coating can be improved, and the coating is compatible with various resins and fillers.
Preferably, the specific type of the substrate wetting agent is TEGO 4200, and the advantages of reducing static surface tension and dynamic surface tension are that the substrate wetting agent also has the effects of shrinkage cavity prevention and low foam stabilization. Is suitable for various systems.
Preferably, the film-forming assistant is an alcohol ester film-forming substance, and is propylene glycol methyl ether specifically.
Preferably, the pigment is copper chromium black.
Preferably, the filler is one or a combination of more of mica powder, ground calcium carbonate, rutile type titanium dioxide and mica iron oxide. The mica powder used in the invention is flaky sericite, the flaky mica powder forms basically parallel orientation arrangement in the paint film, the penetration of water and other corrosive substances to the paint film is strongly blocked, the paint film has a blocking effect on the water and other corrosive substances, and the water resistance and the salt spray resistance of the paint film can be improved, and the wear resistance of the paint film can also be improved. The rutile titanium dioxide has the excellent performances of high temperature resistance, low temperature resistance, corrosion resistance, weather resistance, high strength, small specific gravity, stable chemical properties and the like. The melting point of the rutile type titanium dioxide is 1850 ℃, and the paint film is not pulverized at high temperature. The paint made of mica iron oxide has good water penetration resistance and excellent antirust performance. A further important reason for the selection of these materials in the present invention is that small amounts of hydroxyl groups in the mica powder, ground calcium carbonate, mica iron oxide can react with the resin emulsion of the present invention to form crosslinked polymers and thereby increase the heat resistance of the paint film.
Preferably, the thickener is a polyurethane associative rheological aid. The specific model is RHEOLATE 299, and has the advantages of low addition amount, high efficiency, low influence on water sensitivity and corrosion resistance, no harmful substances such as APEO and tin, and no influence on pH.
The invention also aims to provide a preparation method of the high-performance water-based high-temperature-resistant coating, which comprises the following specific steps:
(1) adding the high-temperature-resistant emulsion into a reaction tank I, starting stirring, controlling the stirring speed to be 300-600 rpm/min, controlling the temperature in the reaction tank I to be less than or equal to 60 ℃, slowly adding the organic silicon defoamer, the amine neutralizer and the base material wetting agent in sequence under stirring, stirring for 10-20 min, and uniformly stirring;
(2) controlling the stirring speed to be 600-1200 rpm/min, controlling the temperature in the reaction tank to be less than or equal to 60 ℃, sequentially adding the pigment, the filler and the distilled water I into the reaction tank while stirring, stirring for 20-40 min, and uniformly stirring to obtain a mixed solution;
(3) grinding the mixed liquid prepared in the step (2), wherein the grinding speed is controlled to be 1500-3500 rpm/min, the grinding time is 30-90 min, the grinding temperature is controlled to be less than or equal to 60 ℃, and the fineness is ground to be less than or equal to 30um to obtain grinding fluid;
(4) and (3) transferring the grinding fluid prepared in the step (3) into a reaction tank II, controlling the stirring speed to be 400-800 rpm/min, controlling the temperature in the reaction tank II to be less than or equal to 60 ℃, sequentially adding a silane coupling agent and a film-forming assistant under stirring, uniformly mixing a thickening agent and distilled water II according to the mass ratio of 1:1, adding, stirring for 20-40 min, and uniformly stirring to obtain the high-performance water-based high-temperature-resistant coating.
The invention has the beneficial effects that:
(1) the high-performance water-based high-temperature-resistant coating prepared by the invention can be fused with Fe in a base material at high temperature by utilizing Si-O-Si bonds of organic silicon in the emulsion to generate a Si-0-Fe silicate inorganic compound coating, and has strong adhesive force to an iron-based base material. And meanwhile, the paint can also react with a small amount of hydroxyl in silicate fillers (mica powder, mica iron oxide, talcum powder and kaolin) in the paint, so that the heat resistance is improved. At high temperatures, silicates can react with silicones, sintering into dense film-forming materials. Thereby obtaining excellent mechanical properties such as adhesion, flexibility, hardness and impact resistance.
(2) The mica powder used in the high-performance water-based high-temperature-resistant paint is flaky sericite, the flaky mica powder forms basically parallel orientation arrangement in a paint film, the penetration of water and other corrosive substances to the paint film is strongly blocked, the high-performance water-based high-temperature-resistant paint has a blocking effect on the water and other corrosive substances, the water resistance and the salt spray resistance of the paint film can be improved, and the wear resistance of the paint film can also be improved. The rutile titanium dioxide has the excellent performances of high temperature resistance, low temperature resistance, corrosion resistance, weather resistance, high strength, small specific gravity, stable chemical properties and the like. The melting point of the rutile type titanium dioxide is 1850 ℃, and the paint film is not pulverized at high temperature. The paint made of mica iron oxide has good water penetration resistance and excellent antirust performance. A further important reason for the selection of these materials in the present invention is that small amounts of hydroxyl groups in the mica powder, ground calcium carbonate, mica iron oxide can react with the resin emulsion of the present invention to form crosslinked polymers and thereby increase the heat resistance of the paint film. Therefore, the water resistance, the salt spray resistance and the acid and alkali resistance are excellent.
(3) The high-performance water-based high-temperature-resistant coating prepared by the invention has extremely high temperature resistance, and particularly outstanding cold and heat cycle resistance, can resist cold and heat cycles for 5 times, and is an extremely cold and hot resistant coating at room temperature to 600 ℃.
(4) The preparation method for preparing the high-performance water-based high-temperature-resistant coating is simple, convenient to operate, capable of saving production cost, capable of saving manpower and material resources and convenient for industrial production, and the produced water-based coating is a non-toxic, harmless, green and environment-friendly product.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The components used in the examples were:
the high-temperature resistant emulsion is Hunan Kaiser 83680;
the organic silicon defoaming agent is HF 3206;
the amine neutralizer is DeuAdd MA-95;
the silane coupling agent is KH 560;
the substrate wetting agent is TEGO 4200;
the thickener is RHEOLATE 299
The other components are all general products sold in the market.
Example 1
The high-performance water-based high-temperature-resistant coating comprises the following components in parts by weight: 40 parts of high-temperature-resistant emulsion, 0.1 part of organic silicon defoamer, 0.2 part of amine neutralizer, 0.5 part of silane coupling agent, 0.3 part of base material wetting agent, 1.4 parts of film-forming additive (propylene glycol methyl ether), 4 parts of pigment (copper chromium black), 18 parts of filler (3 parts of mica powder, 3 parts of ground calcium carbonate, 6 parts of rutile titanium dioxide and 6 parts of mica iron oxide), 18 parts of distilled water I, 0.8 part of thickener and 0.8 part of distilled water II.
The preparation method of the high-performance water-based high-temperature-resistant coating comprises the following specific steps:
(1) adding 40 parts of high-temperature-resistant emulsion into a reaction tank I, starting stirring, controlling the stirring speed to be 300-600 rpm/min, controlling the temperature in the reaction tank I to be less than or equal to 60 ℃, and slowly adding 0.1 part of organic silicon defoamer, 0.2 part of amine neutralizer and 0.3 part of base material wetting agent in turn under stirring, stirring for 10-20 min, and uniformly stirring;
(2) controlling the stirring speed to be 600-1200 rpm/min, controlling the temperature in the reaction tank to be less than or equal to 60 ℃, sequentially adding copper-chromium black, 3 parts of mica powder, 3 parts of heavy calcium carbonate, 6 parts of rutile titanium dioxide, 6 parts of mica iron oxide and 18 parts of distilled water I into the reaction tank under stirring, stirring for 20-40 min, and uniformly stirring to obtain a mixed solution;
(3) grinding the mixed liquid prepared in the step (2), wherein the grinding speed is controlled to be 1500-3500 rpm/min, the grinding time is 30-90 min, the grinding temperature is controlled to be less than or equal to 60 ℃, and the fineness is ground to be less than or equal to 30um to obtain grinding fluid;
(4) and (3) transferring the grinding fluid prepared in the step (3) into a reaction tank II, controlling the stirring speed to be 400-800 rpm/min, controlling the temperature in the reaction tank II to be less than or equal to 60 ℃, sequentially adding 0.5 part of silane coupling agent and 1.4 parts of propylene glycol methyl ether under stirring, uniformly mixing 0.8 part of thickening agent and 0.8 part of distilled water II, adding, stirring for 20-40 min, and uniformly stirring to obtain the high-performance water-based high-temperature-resistant coating.
Example 2
The high-performance water-based high-temperature-resistant coating comprises the following components in parts by weight: 50 parts of high-temperature-resistant emulsion, 0.12 part of an organic silicon defoaming agent, 0.2 part of an amine neutralizing agent, 0.7 part of a silane coupling agent, 0.3 part of a base material wetting agent, 1.6 parts of a film-forming assistant (propylene glycol methyl ether), 4 parts of a pigment (copper chromium black), 18 parts of a filler (3 parts of mica powder, 3 parts of heavy calcium carbonate, 6 parts of rutile titanium dioxide and 6 parts of mica iron oxide), 17 parts of distilled water I, 1.0 part of a thickening agent and 1.0 part of distilled water II.
The preparation method of the high-performance water-based high-temperature-resistant coating comprises the following specific steps:
(1) adding 50 parts of high-temperature-resistant emulsion into a reaction tank I, starting stirring, controlling the stirring speed to be 300-600 rpm/min, controlling the temperature in the reaction tank I to be less than or equal to 60 ℃, and slowly adding 0.12 part of organic silicon defoamer, 0.2 part of amine neutralizer and 0.3 part of base material wetting agent in turn under stirring, stirring for 10-20 min, and uniformly stirring;
(2) controlling the stirring speed to be 600-1200 rpm/min, controlling the temperature in the reaction tank to be less than or equal to 60 ℃, sequentially adding copper-chromium black, 3 parts of mica powder, 3 parts of heavy calcium carbonate, 6 parts of rutile titanium dioxide, 6 parts of mica iron oxide and 17 parts of distilled water I into the reaction tank under stirring, stirring for 20-40 min, and uniformly stirring to obtain a mixed solution;
(3) grinding the mixed liquid prepared in the step (2), wherein the grinding speed is controlled to be 1500-3500 rpm/min, the grinding time is 30-90 min, the grinding temperature is controlled to be less than or equal to 60 ℃, and the fineness is ground to be less than or equal to 30um to obtain grinding fluid;
(4) and (3) transferring the grinding fluid prepared in the step (3) into a reaction tank II, controlling the stirring speed to be 400-800 rpm/min, controlling the temperature in the reaction tank II to be less than or equal to 60 ℃, sequentially adding 0.7 part of silane coupling agent and 1.6 parts of propylene glycol methyl ether under stirring, uniformly mixing 1.0 part of thickening agent and 1.0 part of distilled water II, adding, stirring for 20-40 min, and uniformly stirring to obtain the high-performance water-based high-temperature-resistant coating.
Example 3
The high-performance water-based high-temperature-resistant coating comprises the following components in parts by weight: 60 parts of high-temperature-resistant emulsion, 0.15 part of an organic silicon defoaming agent, 0.2 part of an amine neutralizing agent, 1.0 part of a silane coupling agent, 0.3 part of a base material wetting agent, 1.8 parts of a film-forming assistant (propylene glycol methyl ether), 4 parts of a pigment (copper chromium black), 18 parts of a filler (3 parts of mica powder, 3 parts of heavy calcium carbonate, 6 parts of rutile titanium dioxide and 6 parts of mica iron oxide), 16 parts of distilled water I, 1.2 parts of a thickening agent and 1.2 parts of distilled water II.
The preparation method of the high-performance water-based high-temperature-resistant coating comprises the following specific steps:
(1) adding 60 parts of high-temperature-resistant emulsion into a reaction tank I, starting stirring, controlling the stirring speed to be 300-600 rpm/min, controlling the temperature in the reaction tank I to be less than or equal to 60 ℃, and slowly adding 0.15 part of organic silicon defoamer, 0.2 part of amine neutralizer and 0.3 part of base material wetting agent in turn under stirring, stirring for 10-20 min, and uniformly stirring;
(2) controlling the stirring speed to be 600-1200 rpm/min, controlling the temperature in the reaction tank to be less than or equal to 60 ℃, sequentially adding copper-chromium black, 3 parts of mica powder, 3 parts of heavy calcium carbonate, 6 parts of rutile titanium dioxide, 6 parts of mica iron oxide and 16 parts of distilled water I into the reaction tank under stirring, stirring for 20-40 min, and uniformly stirring to obtain a mixed solution;
(3) grinding the mixed liquid prepared in the step (2), wherein the grinding speed is controlled to be 1500-3500 rpm/min, the grinding time is 30-90 min, the grinding temperature is controlled to be less than or equal to 60 ℃, and the fineness is ground to be less than or equal to 30um to obtain grinding fluid;
(4) and (3) transferring the grinding fluid prepared in the step (3) into a reaction tank II, controlling the stirring speed to be 400-800 rpm/min, controlling the temperature in the reaction tank II to be less than or equal to 60 ℃, sequentially adding 1.0 part of silane coupling agent and 1.8 parts of propylene glycol methyl ether under stirring, uniformly mixing 1.2 parts of thickening agent and 1.2 parts of distilled water II, adding, stirring for 20-40 min, and uniformly stirring to obtain the high-performance water-based high-temperature-resistant coating.
Example 4
The high-performance water-based high-temperature-resistant coating comprises the following components in parts by weight: 70 parts of high-temperature-resistant emulsion, 0.15 part of organic silicon defoaming agent, 0.2 part of amine neutralizer, 1.5 parts of silane coupling agent, 0.3 part of base material wetting agent, 2.0 parts of film-forming additive (propylene glycol methyl ether), 4 parts of pigment (copper chromium black), 18 parts of filler (3 parts of mica powder, 3 parts of heavy calcium carbonate, 6 parts of rutile titanium dioxide and 6 parts of mica iron oxide), 15 parts of distilled water I, 1.5 parts of thickening agent and 1.5 parts of distilled water II.
The preparation method of the high-performance water-based high-temperature-resistant coating comprises the following specific steps:
(1) adding 70 parts of high-temperature-resistant emulsion into a reaction tank I, starting stirring, controlling the stirring speed to be 300-600 rpm/min, controlling the temperature in the reaction tank I to be less than or equal to 60 ℃, and slowly adding 0.15 part of organic silicon defoamer, 0.2 part of amine neutralizer and 0.3 part of base material wetting agent in turn under stirring, stirring for 10-20 min, and uniformly stirring;
(2) controlling the stirring speed to be 600-1200 rpm/min, controlling the temperature in the reaction tank to be less than or equal to 60 ℃, sequentially adding copper-chromium black, 3 parts of mica powder, 3 parts of heavy calcium carbonate, 6 parts of rutile titanium dioxide, 6 parts of mica iron oxide and 15 parts of distilled water I into the reaction tank under stirring, stirring for 20-40 min, and uniformly stirring to obtain a mixed solution;
(3) grinding the mixed liquid prepared in the step (2), wherein the grinding speed is controlled to be 1500-3500 rpm/min, the grinding time is 30-90 min, the grinding temperature is controlled to be less than or equal to 60 ℃, and the fineness is ground to be less than or equal to 30um to obtain grinding fluid;
(4) and (3) transferring the grinding fluid prepared in the step (3) into a reaction tank II, controlling the stirring speed to be 400-800 rpm/min, controlling the temperature in the reaction tank II to be less than or equal to 60 ℃, sequentially adding 1.5 parts of silane coupling agent and 2.0 parts of propylene glycol methyl ether under stirring, uniformly mixing 1.5 parts of thickening agent and 1.5 parts of distilled water II, adding, stirring for 20-40 min, and uniformly stirring to obtain the high-performance water-based high-temperature-resistant coating.
Comparative example 1
The water-based high-temperature-resistant coating comprises the following components in parts by weight: 60 parts of organic silicon emulsion (Wake MPF52E), 0.15 part of organic silicon defoamer, 0.2 part of amine neutralizer, 1.0 part of silane coupling agent, 0.3 part of base material wetting agent, 6.0 parts of film-forming assistant (propylene glycol methyl ether), 4 parts of pigment (copper chromium black), 18 parts of filler (3 parts of mica powder, 3 parts of heavy calcium carbonate, 6 parts of rutile titanium dioxide and 6 parts of mica iron oxide), 16 parts of distilled water, 1.2 parts of thickener and 1.2 parts of distilled water II.
A preparation method of a water-based high-temperature-resistant coating comprises the following specific steps:
(1) adding 60 parts of organic silicon emulsion into a reaction tank I, starting stirring, controlling the stirring speed to be 300-600 rpm/min, controlling the temperature in the reaction tank I to be less than or equal to 60 ℃, slowly adding 0.15 part of organic silicon defoamer, 0.2 part of amine neutralizer and 0.3 part of base material wetting agent in turn under stirring, stirring for 10-20 min, and uniformly stirring;
(2) controlling the stirring speed to be 600-1200 rpm/min, controlling the temperature in the reaction tank to be less than or equal to 60 ℃, sequentially adding copper-chromium black, 3 parts of mica powder, 3 parts of heavy calcium carbonate, 6 parts of rutile titanium dioxide, 6 parts of mica iron oxide and 16 parts of distilled water I into the reaction tank under stirring, stirring for 20-40 min, and uniformly stirring to obtain a mixed solution;
(3) grinding the mixed liquid prepared in the step (2), wherein the grinding speed is controlled to be 1500-3500 rpm/min, the grinding time is 30-90 min, the grinding temperature is controlled to be less than or equal to 60 ℃, and the fineness is ground to be less than or equal to 30um to obtain grinding fluid;
(4) and (3) transferring the grinding fluid prepared in the step (3) into a reaction tank II, controlling the stirring speed to be 400-800 rpm/min, controlling the temperature in the reaction tank II to be less than or equal to 60 ℃, sequentially adding 1.0 part of silane coupling agent and 6.0 parts of propylene glycol methyl ether under stirring, uniformly mixing 1.2 parts of thickening agent and 1.2 parts of distilled water II, adding, stirring for 20-40 min, and uniformly stirring to obtain the water-based high-temperature-resistant coating.
Comparative example 2
The water-based high-temperature-resistant coating comprises the following components in parts by weight: 60 parts of organic silicon emulsion (Xin Sihai 9608), 0.15 part of organic silicon defoamer, 0.2 part of amine neutralizer, 1.2 parts of silane coupling agent, 0.3 part of base material wetting agent, 2.0 parts of film-forming additive (propylene glycol methyl ether), 4 parts of pigment (copper chromium black), 18 parts of filler (3 parts of mica powder, 3 parts of heavy calcium carbonate, 6 parts of rutile titanium dioxide and 6 parts of mica iron oxide), 16 parts of distilled water, 1.2 parts of thickener and 1.2 parts of distilled water II.
A preparation method of a water-based high-temperature-resistant coating comprises the following specific steps:
(1) adding 60 parts of organic silicon emulsion into a reaction tank I, starting stirring, controlling the stirring speed to be 300-600 rpm/min, controlling the temperature in the reaction tank I to be less than or equal to 60 ℃, slowly adding 0.15 part of organic silicon defoamer, 0.2 part of amine neutralizer and 0.3 part of base material wetting agent in turn under stirring, stirring for 10-20 min, and uniformly stirring;
(2) controlling the stirring speed to be 600-1200 rpm/min, controlling the temperature in the reaction tank to be less than or equal to 60 ℃, sequentially adding copper-chromium black, 3 parts of mica powder, 3 parts of heavy calcium carbonate, 6 parts of rutile titanium dioxide, 6 parts of mica iron oxide and 16 parts of distilled water I into the reaction tank under stirring, stirring for 20-40 min, and uniformly stirring to obtain a mixed solution;
(3) grinding the mixed liquid prepared in the step (2), wherein the grinding speed is controlled to be 1500-3500 rpm/min, the grinding time is 30-90 min, the grinding temperature is controlled to be less than or equal to 60 ℃, and the fineness is ground to be less than or equal to 30um to obtain grinding fluid;
(4) and (3) transferring the grinding fluid prepared in the step (3) into a reaction tank II, controlling the stirring speed to be 400-800 rpm/min, controlling the temperature in the reaction tank II to be less than or equal to 60 ℃, sequentially adding 1.2 parts of silane coupling agent and 6.0 parts of propylene glycol methyl ether under stirring, uniformly mixing 1.2 parts of thickening agent and 1.2 parts of distilled water II, adding, stirring for 20-40 min, and uniformly stirring to obtain the water-based high-temperature-resistant coating.
The products prepared in example 1, example 2, example 3 and example 4 and the products prepared in comparative example 1 and comparative example 2 are subjected to performance test, and the test results are shown in the following table 1:
TABLE 1 results of the measurements
According to the detection result, the high-performance water-based high-temperature-resistant coating disclosed by the invention has excellent mechanical properties such as adhesion, flexibility, hardness and impact resistance; on the test of heat resistance, the coating has extremely high temperature resistance, the cold and heat cycle resistance of the coating is particularly outstanding, the coating can resist cold and heat cycles for 5 times, and the temperature is between room temperature and 600 ℃, and the coating is extremely cold and hot resistant; and the water resistance, the salt spray resistance and the acid and alkali resistance are all excellent.
Although the present invention has been described in detail by way of preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The high-performance water-based high-temperature-resistant coating is characterized by comprising the following components in parts by weight: 40-70 parts of high-temperature-resistant emulsion, 0.05-0.3 part of organic silicon defoamer, 0.07-1.5 parts of amine neutralizer, 0.2-5 parts of silane coupling agent, 0.08-1.5 parts of base material wetting agent, 1-15 parts of film-forming assistant, 0.5-8 parts of pigment, 15-40 parts of filler, 6-30 parts of distilled water I, 0.1-5 parts of thickening agent and 0.1-5 parts of distilled water II.
2. The high-performance water-based high-temperature-resistant coating as claimed in claim 1, which comprises the following components in parts by weight: 65 parts of high-temperature-resistant emulsion, 0.15 part of organic silicon defoamer, 0.5 part of amine neutralizer, 1.8 parts of silane coupling agent, 0.8 part of base material wetting agent, 5 parts of film-forming assistant, 6 parts of pigment, 25 parts of filler, 18 parts of distilled water I, 3 parts of thickener and 3 parts of distilled water II.
3. The high-performance water-based high-temperature-resistant coating as claimed in claim 1, wherein the high-temperature-resistant emulsion is a water-soluble nano active silanol modified silicone emulsion, the pH value is 7.0-11.0, and the specific model is 83680 of Kaisley in Hunan.
4. The high-performance aqueous high-temperature-resistant coating as claimed in claim 1, wherein the aqueous silicone defoamer is HF 3206.
5. The high-performance aqueous high-temperature-resistant coating material of claim 1, wherein the amine neutralizer is DeuAdd MA-95.
6. The high-performance aqueous high-temperature-resistant coating according to claim 1, wherein the silane coupling agent is specifically KH 560.
7. The high performance aqueous high temperature resistant coating of claim 1, wherein the substrate wetting agent is TEGO 4200.
8. The high-performance water-based high-temperature-resistant coating as claimed in claim 1, wherein the film-forming assistant is an alcohol ester film-forming substance, specifically propylene glycol methyl ether.
9. The high performance aqueous high temperature resistant coating of claim 1, wherein the pigment is copper chromium black;
further preferably, the filler is one or a combination of more of mica powder, ground calcium carbonate, rutile titanium dioxide and mica iron oxide;
further preferably, the thickener is a polyurethane associative rheological aid, and the specific model is RHEOLATE 299.
10. The preparation method of the high-performance water-based high-temperature-resistant coating comprises the following specific steps:
(1) adding the high-temperature-resistant emulsion into a reaction tank I, starting stirring, controlling the stirring speed to be 300-600 rpm/min, controlling the temperature in the reaction tank I to be less than or equal to 60 ℃, slowly adding the organic silicon defoamer, the amine neutralizer and the base material wetting agent in sequence under stirring, stirring for 10-20 min, and uniformly stirring;
(2) controlling the stirring speed to be 600-1200 rpm/min, controlling the temperature in the reaction tank to be less than or equal to 60 ℃, sequentially adding the pigment, the filler and the distilled water I into the reaction tank while stirring, stirring for 20-40 min, and uniformly stirring to obtain a mixed solution;
(3) grinding the mixed liquid prepared in the step (2), wherein the grinding speed is controlled to be 1500-3500 rpm/min, the grinding time is 30-90 min, the grinding temperature is controlled to be less than or equal to 60 ℃, and the fineness is ground to be less than or equal to 30um to obtain grinding fluid;
(4) and (3) transferring the grinding fluid prepared in the step (3) into a reaction tank II, controlling the stirring speed to be 400-800 rpm/min, controlling the temperature in the reaction tank II to be less than or equal to 60 ℃, sequentially adding a silane coupling agent and a film-forming assistant under stirring, uniformly mixing a thickening agent and distilled water II according to the mass ratio of 1:1, adding, stirring for 20-40 min, and uniformly stirring to obtain the high-performance water-based high-temperature-resistant coating.
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Cited By (1)
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| CN114836130A (en) * | 2022-05-25 | 2022-08-02 | 湖南梓先新材料有限公司 | Normal-temperature self-drying high-temperature-resistant water-based paint and preparation method thereof |
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| CN105602302A (en) * | 2016-03-23 | 2016-05-25 | 陈威 | Water-based inorganic negative ion coating and preparation method thereof |
| CN106243852A (en) * | 2016-08-29 | 2016-12-21 | 浙江德尔福新型建材有限公司 | High-performance water-based light non-corrosive metal (NCM) protective paint and preparation method thereof |
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| CN114836130A (en) * | 2022-05-25 | 2022-08-02 | 湖南梓先新材料有限公司 | Normal-temperature self-drying high-temperature-resistant water-based paint and preparation method thereof |
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