CN114292537A - Elastic waterproof nano coating and preparation method thereof - Google Patents
Elastic waterproof nano coating and preparation method thereof Download PDFInfo
- Publication number
- CN114292537A CN114292537A CN202210187019.6A CN202210187019A CN114292537A CN 114292537 A CN114292537 A CN 114292537A CN 202210187019 A CN202210187019 A CN 202210187019A CN 114292537 A CN114292537 A CN 114292537A
- Authority
- CN
- China
- Prior art keywords
- ceramic micro
- parts
- micro powder
- powder
- elastic waterproof
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Paints Or Removers (AREA)
Abstract
The invention provides an elastic waterproof nano coating and a preparation method thereof, belonging to the technical field of coatings and being prepared from the following raw materials in parts by weight: 5-10 parts of modified ceramic micro powder, 20-30 parts of emulsified asphalt, 25-40 parts of modified silica sol, 2-5 parts of film-forming additive, 1-2 parts of defoaming agent, 1-2 parts of dispersing agent and 20-60 parts of water. The elastic waterproof nano coating prepared by the invention has good waterproof performance, elasticity, toughness and elongation, weather resistance and incombustibility, obviously prolongs the service life of the coating, and has wide application prospect.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to an elastic waterproof nano coating and a preparation method thereof.
Background
With the development of building facade decorative materials, building exterior wall coatings with the characteristics of light weight, environmental protection, bright color, simple construction and the like gradually become main corners for decorating and protecting building exterior walls, and the elasticity of the exterior wall coatings is one of important indexes of the exterior wall coatings because the exterior wall coatings are coated on the building exterior wall surfaces.
The design of the formula of the exterior wall coating needs to integrate various factors, in a certain sense, the coating can be calculated as a composite material, the types and the contents of components such as film-forming resin, pigment, filler, auxiliary agent and the like in the formula determine the performance of the coating, the film-forming resin in the coating is a continuous phase in the coating and determines the main performance of the coating, and the resin used in the building exterior wall coating mainly comprises acrylic resin, alkyd resin, polyurethane and the like; the pigment and filler in the paint not only determines the color of the paint, but also determines the mechanical strength, elasticity, wear resistance and cost of the paint, and the main varieties of the common pigment and filler comprise natural calcium carbonate, barite powder, quartz powder, talcum powder, kaolin, mica powder and the like; the auxiliary agent, also called paint auxiliary material, can improve the performance of the coating and promote the formation of a coating film. However, the daily exterior wall coating is weak in the interaction force between the pigment filler and the film-forming resin and also weak in the reinforcement effect on the film-forming resin, so that the elasticity, the mechanical strength and the wear resistance of the exterior wall coating formed by combining the pigment filler, the film-forming resin and the auxiliary agent are not greatly improved.
Chinese patent CN101831219A discloses a waterproof and heat-insulating water-based paint, wherein the film-forming emulsion is an ethylene-vinyl acetate copolymer (EVA) and acrylic acid copolymer emulsion, and the filler is conventional powder such as heavy calcium powder, talcum powder, phosphorus powder and the like. Chinese patent CN1590481A discloses a ceramic heat-insulating elastic coating, which is prepared by adopting a cold splicing technology of elastic emulsion and fluorine acrylic and has good stain resistance and colorability. Chinese patent CN101709193A discloses a water-based acrylic waterproof heat-insulating coating, which is prepared by cold mixing of an elastic acrylic copolymer emulsion and an ethylene-vinyl acetate copolymer emulsion (VAE) serving as base materials with an organic silicon waterproof material, and has good elasticity and high bonding strength. However, the above techniques still have such or other disadvantages in terms of the combined effects of heat insulation, water resistance, high elasticity, stain resistance, aging resistance, environmental protection, and the like.
Disclosure of Invention
The invention aims to provide an elastic waterproof nano coating and a preparation method thereof, which have good waterproof performance, elasticity, toughness and elongation, weather resistance and incombustibility, remarkably prolong the service life of the coating and have wide application prospect.
The technical scheme of the invention is realized as follows:
the invention provides an elastic waterproof nano coating which is characterized by being prepared from the following raw materials in parts by weight: 5-10 parts of modified ceramic micro powder, 20-30 parts of emulsified asphalt, 25-40 parts of modified silica sol, 2-5 parts of film-forming additive, 1-2 parts of defoaming agent, 1-2 parts of dispersing agent and 20-60 parts of water.
As a further improvement of the invention, the preparation method of the modified silica sol comprises the following steps: uniformly mixing alkaline silica sol, tetraethoxysilane, ethanol and water, adding organosilane, adding acetic acid to adjust the pH value to 5-6, and mixing for reaction to obtain the organic silicon modified silica sol.
As a further improvement of the invention, the organosilane is methyltrimethoxysilane or methyltriethoxysilane; the reaction time is 4-7 h.
As a further improvement of the invention, the mass ratio of the alkaline silica sol, the tetraethoxysilane, the ethanol, the water and the organosilane is (5-10): (1-2): (2-4): (10-15): (5-7).
As a further improvement of the invention, the preparation method of the modified ceramic micro powder comprises the following steps:
s1, preparing polydopamine-coated ceramic micro powder: dispersing ceramic micro powder in water, adding dopamine hydrochloride, adding a Tris-HCl solution, heating for reaction, centrifuging, washing and drying to obtain polydopamine coated ceramic micro powder;
s2, preparing silicon dioxide nano powder: adding tetraethoxysilane into an ethanol water solution, adjusting the pH value of the solution to 5-6.5, heating for reaction to obtain sol, increasing the temperature of a heater, reducing the pressure to form dry gel, taking out, and igniting the dry gel to obtain silicon dioxide nano powder;
s3, preparing modified ceramic micro powder: and (4) uniformly dispersing the silicon dioxide nano powder prepared in the step (S2) in ethanol, adding the polydopamine-coated ceramic micro powder prepared in the step (S1) and acrylic emulsion, and heating, stirring and reacting to obtain the modified ceramic micro powder.
As a further improvement of the invention, the mass ratio of the ceramic micro powder, the dopamine hydrochloride and the Tris-HCl solution in the step S1 is 10: (12-15): (2-4); the pH value of the Tris-HCl solution is 5-6, the heating temperature is 40-60 ℃, and the reaction time is 2-4 h.
As a further improvement of the invention, the concentration of ethanol in the ethanol aqueous solution in the step S2 is 30-50 wt%; the heating temperature is 30-50 ℃, the reaction time is 1-3h, the temperature of the heater is increased to 120-150 ℃, and the pressure is reduced to 0.01-0.1 MPa.
As a further improvement of the invention, the mass ratio of the silica nano powder, the polydopamine-coated ceramic micro powder and the acrylic emulsion in the step S3 is (7-12): 10: (3-7); heating to the temperature of 60-80 ℃, and reacting for 2-5 h; the acrylic emulsion is selected from at least one of Carboset AE-960, Carboset RPT 3030 and Carboset 26930.
The invention further provides a preparation method of the elastic waterproof nano-coating, which comprises the following steps: adding the film forming assistant, the defoaming agent and the dispersing agent into water, dispersing at a low speed for 10-20min, adding the modified silica sol and the modified ceramic micro powder, dispersing at a high speed for 30-50min, adding the emulsified asphalt into the system, and dispersing at a low speed for 10-20min to obtain the elastic waterproof nano coating.
The film-forming additive is alcohol ester-12 or 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate; the dispersant is polyethylene glycol or acrylate copolymer carboxylate; the defoaming agent is at least one selected from emulsified silicone oil, high-alcohol fatty acid ester compound, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether, polyoxypropylene polyoxyethylene glycerol ether and polydimethylsiloxane.
As a further improvement of the invention, the rotating speed of the low-speed dispersion is 500-700r/min, and the rotating speed of the high-speed dispersion is 2000-3000 r/min.
The invention has the following beneficial effects: the modified ceramic micro powder prepared by the invention is coated with a layer of polydopamine, and the polydopamine is easy to adhere to the prepared silicon dioxide nano powder and acrylic emulsion by utilizing the viscosity of the polydopamine and rich functional groups such as hydroxyl, amino and the like on the polydopamine, so that the outer surface of the ceramic micro powder is coated with a layer of silicon dioxide nano powder and acrylic resin, a large number of unsaturated residual bonds and hydroxyl groups exist on the surface of the nano silicon dioxide, the molecular state of the nano silicon dioxide is in a three-dimensional chain structure, the nano silicon dioxide has good thixotropy, the characteristic of quickly forming a net structure in a coating is realized, and the aging resistance, the adhesive force and the mechanical property of the coating are obviously improved; meanwhile, the silicon dioxide nano powder has good hydrophobicity, so that the waterproof performance of the coating is greatly improved; the acrylic emulsion has lower glass transition temperature, so that the acrylic emulsion can still keep good elasticity, toughness and elongation at low temperature, and after the modified ceramic micro powder coated with the acrylic emulsion on the surface is added into the coating, the coating has good extensibility, resists cracks generated at low temperature to a certain extent, reduces water seepage of a wall surface, and prolongs the service life of the coating.
In the modified silica sol prepared by the invention, the more the number of alkoxy groups directly connected with silicon atoms of organosilane is, the higher the hydrolytic activity is; in addition, the longer the organic chain of the silane is, the greater the steric hindrance is, the poorer the reactivity of the silane with the silica sol and the organosilicon in the copolymerization is, the film-forming property, the hydrophobicity, the elasticity, the weather resistance and the incombustibility of the coating can be obviously improved by adding the organosilane modified silica sol into the coating, and the waterproof property and the elasticity of the prepared coating are enhanced, so that the service life of the coating is prolonged.
The elastic waterproof nano coating prepared by the invention has good waterproof performance, elasticity, toughness and elongation, weather resistance and incombustibility, obviously prolongs the service life of the coating, and has wide application prospect.
Detailed Description
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 alkaline silica sol was purchased from Acksonobel under the trade name Bindzil 9950, having a silicon content of 50% and a pH of 9.0. Acrylic emulsions Carboset AE-960, Carboset RPT 3030 and Carboset 26930 were purchased from Basff, with Carboset AE-960 solid content of 56% and pH of 8.2-9; the glass transition temperature is-25 ℃, the solid content of Carboset RPT 3030 is 55%, and the pH value is 8; the glass transition temperature is-35 ℃; carboset 26930 having a solids content of 35% and a pH of 8.1; the glass transition temperature was-36 ℃. The ceramic micro powder is purchased from Shanghai Hui Jing sub-nanometer new material Co. Emulsified asphalt, available from Hangzhou Rich materials Co., Ltd.
Preparation example 1 preparation of modified silica Sol
The method comprises the following steps:
5g of alkaline silica sol, 1g of tetraethoxysilane, 2g of ethanol and 10g of water are uniformly mixed, 5g of methyltrimethoxysilane is added, acetic acid is added to adjust the pH value to 5, and the mixture is mixed and reacted for 4 hours at 30 ℃ to obtain the organic silicon modified silica sol.
Preparation example 2 preparation of modified silica Sol
The method comprises the following steps:
uniformly mixing 10g of alkaline silica sol, 2g of tetraethoxysilane, 4g of ethanol and 15g of water, adding 7g of methyltriethoxysilane, adding acetic acid to adjust the pH value to 6, and carrying out mixing reaction at 50 ℃ for 7 hours to obtain the organic silicon modified silica sol.
Preparation example 3 preparation of modified silica Sol
The method comprises the following steps:
uniformly mixing 7g of alkaline silica sol, 1.5g of tetraethoxysilane, 3g of ethanol and 12g of water, adding 6g of methyltrimethoxysilane, adding acetic acid to adjust the pH value to 5.5, and mixing and reacting at 40 ℃ for 6 hours to obtain the organic silicon modified silica sol.
Comparative preparation example 1
Compared with preparation example 3, methyltrimethoxysilane is replaced by dodecyl methyl dimethoxysilane, and other conditions are not changed.
Preparation example 4 preparation of modified ceramic Fine powder
The method comprises the following steps:
s1, preparing polydopamine-coated ceramic micro powder: adding 10g of ceramic micro powder into 50mL of water, performing ultrasonic dispersion at 1000W for 20min, adding 12g of dopamine hydrochloride, adding 2g of Tris-HCl solution with the pH value of 5, heating to 40 ℃ to react for 2h, centrifuging at 3000r/min for 10min, washing with deionized water, and drying at 70 ℃ for 2h to obtain polydopamine-coated ceramic micro powder;
s2, preparing silicon dioxide nano powder: adding 10g of tetraethoxysilane into 50mL of 30 wt% ethanol aqueous solution, adjusting the pH value of the solution to 5, heating to 30 ℃ for reaction for 1h to obtain sol, raising the temperature of a heater to 120 ℃, reducing the pressure to 0.01MPa to form dry gel, taking out, and igniting the dry gel to obtain silicon dioxide nano powder;
s3, preparing modified ceramic micro powder: and (3) adding 7g of the silicon dioxide nano powder prepared in the step S2 into 100mL of ethanol, performing ultrasonic dispersion for 30min at 1000W, adding 10g of the polydopamine-coated ceramic micro powder prepared in the step S1 and 3g of acrylic emulsion Carboset 26930, heating to 60 ℃, and stirring to react for 2h to obtain the modified ceramic micro powder.
Preparation example 5 preparation of modified ceramic Fine powder
The method comprises the following steps:
s1, preparing polydopamine-coated ceramic micro powder: adding 10g of ceramic micro powder into 50mL of water, performing ultrasonic dispersion at 1000W for 20min, adding 15g of dopamine hydrochloride, adding 4g of Tris-HCl solution with the pH value of 6, heating to 60 ℃, reacting for 4h, centrifuging at 3000r/min for 10min, washing with deionized water, and drying at 70 ℃ for 2h to obtain polydopamine-coated ceramic micro powder;
s2, preparing silicon dioxide nano powder: adding 10g of tetraethoxysilane into 50mL of 50 wt% ethanol water solution, adjusting the pH value of the solution to 6.5, heating to 50 ℃ for reaction for 3h to obtain sol, raising the temperature of a heater to 150 ℃, reducing the pressure to 0.1MPa to form dry gel, taking out, and igniting the dry gel to obtain silicon dioxide nano powder;
s3, preparing modified ceramic micro powder: and (3) adding 12g of the silicon dioxide nano powder obtained in the step S2 into 100mL of ethanol, performing ultrasonic dispersion for 30min at 1000W, adding 10g of the polydopamine-coated ceramic micro powder obtained in the step S1 and 7g of acrylic emulsion Carboset RPT 3030, heating to 80 ℃, and stirring to react for 5h to obtain the modified ceramic micro powder.
Preparation example 6 preparation of modified ceramic Fine powder
The method comprises the following steps:
s1, preparing polydopamine-coated ceramic micro powder: adding 10g of ceramic micro powder into 50mL of water, performing ultrasonic dispersion for 20min at 1000W, adding 13.5g of dopamine hydrochloride, adding 3g of Tris-HCl solution with the pH value of 5.5, heating to 50 ℃ to react for 3h, centrifuging at 3000r/min for 10min, washing with deionized water, and drying at 70 ℃ for 2h to obtain polydopamine-coated ceramic micro powder;
s2, preparing silicon dioxide nano powder: adding 10g of tetraethoxysilane into 50mL of 40 wt% ethanol aqueous solution, adjusting the pH value of the solution to 6, heating to 40 ℃ for reaction for 2 hours to obtain sol, raising the temperature of a heater to 135 ℃, reducing the pressure to 0.05MPa to form dry gel, taking out, and igniting the dry gel to obtain silicon dioxide nano powder;
s3, preparing modified ceramic micro powder: and (3) adding 10g of the silicon dioxide nano powder prepared in the step S2 into 100mL of ethanol, performing ultrasonic dispersion for 30min at 1000W, adding 10g of the polydopamine-coated ceramic micro powder prepared in the step S1 and 5g of acrylic emulsion Carboset AE-960, heating to 70 ℃, stirring and reacting for 3.5h to obtain the modified ceramic micro powder.
Comparative preparation example 2
Step S1 was not performed, and other conditions were not changed, compared with preparation example 6.
The method comprises the following steps:
s1, preparing silicon dioxide nano powder: adding 10g of tetraethoxysilane into 50mL of 40 wt% ethanol aqueous solution, adjusting the pH value of the solution to 6, heating to 40 ℃ for reaction for 2 hours to obtain sol, raising the temperature of a heater to 135 ℃, reducing the pressure to 0.05MPa to form dry gel, taking out, and igniting the dry gel to obtain silicon dioxide nano powder;
s2, preparing modified ceramic micro powder: and (3) adding 10g of the silicon dioxide nano powder prepared in the step S1 into 100mL of ethanol, ultrasonically dispersing for 30min at 1000W, adding 10g of ceramic micro powder and 5g of acrylic emulsion Carboset AE-960, heating to 70 ℃, stirring and reacting for 3.5h to obtain the modified ceramic micro powder.
Comparative preparation example 3
Compared with preparation example 6, no acrylic emulsion Carboset AE-960 was added, and other conditions were not changed.
The method comprises the following steps:
s1, preparing polydopamine-coated ceramic micro powder: adding 10g of ceramic micro powder into 50mL of water, performing ultrasonic dispersion for 20min at 1000W, adding 13.5g of dopamine hydrochloride, adding 3g of Tris-HCl solution with the pH value of 5.5, heating to 50 ℃ to react for 3h, centrifuging at 3000r/min for 10min, washing with deionized water, and drying at 70 ℃ for 2h to obtain polydopamine-coated ceramic micro powder;
s2, preparing silicon dioxide nano powder: adding 10g of tetraethoxysilane into 50mL of 40 wt% ethanol aqueous solution, adjusting the pH value of the solution to 6, heating to 40 ℃ for reaction for 2 hours to obtain sol, raising the temperature of a heater to 135 ℃, reducing the pressure to 0.05MPa to form dry gel, taking out, and igniting the dry gel to obtain silicon dioxide nano powder;
s3, preparing modified ceramic micro powder: and (3) adding 10g of the silicon dioxide nano powder prepared in the step S2 into 100mL of ethanol, performing ultrasonic dispersion for 30min at 1000W, adding 15g of the polydopamine-coated ceramic micro powder prepared in the step S1, heating to 70 ℃, stirring and reacting for 3.5h to obtain the modified ceramic micro powder.
Example 1
The embodiment provides a preparation method of an elastic waterproof nano-coating, which comprises the following steps: 2g of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 1g of polyoxyethylene polyoxypropylene ether and 1g of polyethylene glycol 400 are added into 20g of water, after dispersion is carried out for 10min at 500r/min, 25g of modified silica sol prepared in preparation example 1 and 5g of modified ceramic micro powder prepared in preparation example 4 are added, dispersion is carried out for 30min at 2000r/min, 20g of emulsified asphalt is added into the system, and after dispersion is carried out for 10min at 500r/min, the elastic waterproof nano-coating is obtained.
Example 2
The embodiment provides a preparation method of an elastic waterproof nano-coating, which comprises the following steps: adding 5g of alcohol ester-12, 2g of emulsified silicone oil and 2g of acrylate copolymer carboxylate into 60g of water, dispersing for 20min at 700r/min, adding 40g of modified silica sol prepared in preparation example 4 and 10g of modified ceramic micro powder prepared in preparation example 5, dispersing for 50min at 3000r/min, adding 30g of emulsified asphalt into the system, and dispersing for 20min at 700r/min to obtain the elastic waterproof nano coating.
Example 3
The embodiment provides a preparation method of an elastic waterproof nano-coating, which comprises the following steps: 3.5g of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 1.5g of polyoxyethylene polyoxypropylene pentaerythritol ether and 1.5g of polyethylene glycol 400 were added to 40g of water, and after dispersion at 600r/min for 15min, 32g of the modified silica sol prepared in preparation example 3 and 7g of the modified ceramic fine powder prepared in preparation example 6 were added, and after dispersion at 2500r/min for 40min, 25g of emulsified asphalt was added to the system, and after dispersion at 600r/min for 15min, an elastic waterproof nano-coating was obtained.
Comparative example 1
In comparison with example 3, the modified silica sol prepared in preparation example 3 was replaced with the modified silica sol prepared in comparative preparation example 1, and the other conditions were not changed.
Comparative example 2
Compared with example 3, the modified ceramic fine powder obtained in production example 6 was replaced with the modified ceramic fine powder obtained in comparative production example 2, and the other conditions were not changed.
Comparative example 3
Compared with example 3, the modified ceramic fine powder obtained in production example 6 was replaced with the modified ceramic fine powder obtained in comparative production example 3, and the other conditions were not changed.
Test example 1
The elastic waterproof nano-coating materials prepared in examples 1 to 3 of the present invention and comparative examples 1 to 3 were subjected to a performance test, and the results are shown in table 1.
The tensile strength, the elongation at break, the water resistance, the stain resistance and the artificial aging resistance are detected according to a test method in JG-T172-2014 elastic building coating, wherein the artificial aging resistance standard is as follows: foaming within 400h, no peeling and no crack; pulverization is less than or equal to grade 1; the color change is less than or equal to 2 grades.
TABLE 1
The elastic waterproof nano paint prepared by the invention has the advantages of good mechanical property, high tensile strength, high elongation at break, good water resistance, good aging resistance and good stain resistance.
In the preparation of the organosilane-modified silica sol of comparative example 1, methyltrimethoxysilane was replaced with dodecylmethyldimethoxysilane, so that the elasticity, water resistance, etc. of the organosilane were decreased, and the higher the number of alkoxy groups directly bonded to the silicon atom of the organosilane was, the higher the hydrolytic activity was; in addition, the longer the organic chain of the silane is, the greater the steric hindrance is, the poorer the reactivity of the silane with the silica sol and the organosilicon in the copolymerization is, the film-forming property, the hydrophobicity, the elasticity, the weather resistance and the incombustibility of the coating can be obviously improved by adding the organosilane modified silica sol into the coating, and the waterproof property and the elasticity of the prepared coating are enhanced, so that the service life of the coating is prolonged.
In the comparative example 2, the step S1 is not performed, the modified ceramic micro powder surface is not covered with a layer of polydopamine, and is further difficult to be covered with the silicon dioxide nano powder, so that the silicon dioxide nano powder covered on the ceramic micro powder surface is very little, and a small amount of acrylic emulsion is covered, so that the performances such as waterproof performance, elasticity and mechanical property are reduced, the modified ceramic micro powder surface prepared by the invention is covered with a layer of polydopamine, and is easy to adhere with the prepared silicon dioxide nano powder and acrylic emulsion by utilizing the viscosity of the polydopamine and rich functional groups such as hydroxyl, amino and the like on the polydopamine, so that the outer surface of the ceramic micro powder is further covered with a layer of silicon dioxide nano powder and acrylic resin, the nano silicon dioxide surface has a large amount of unsaturated residual bonds and hydroxyl groups, the molecular state of the nano silicon dioxide surface is in a three-dimensional chain structure, and has good thixotropy, and can quickly form the characteristic of a net structure in the coating, the aging resistance, the adhesive force and the mechanical property of the coating are obviously improved; meanwhile, the silicon dioxide nano powder has good hydrophobicity, and the waterproof performance of the coating is greatly improved.
The acrylic emulsion is not added in the preparation of the modified ceramic micro powder in the comparative example 3, the breaking elongation of the prepared elastic waterproof nano coating is reduced, the waterproof performance is slightly reduced, the acrylic emulsion has lower glass transition temperature, and can still keep good elasticity, toughness and elongation at low temperature, and after the modified ceramic micro powder with the surface coated with the acrylic emulsion is added into the coating, the coating has good extensibility, can resist cracks generated at low temperature to a certain extent, reduces the water seepage of wall surfaces, and prolongs the service life of the coating.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The elastic waterproof nano coating is characterized by being prepared from the following raw materials in parts by weight: 5-10 parts of modified ceramic micro powder, 20-30 parts of emulsified asphalt, 25-40 parts of modified silica sol, 2-5 parts of film-forming additive, 1-2 parts of defoaming agent, 1-2 parts of dispersing agent and 20-60 parts of water.
2. The elastic waterproof nano-coating according to claim 1, wherein the preparation method of the modified silica sol is as follows: uniformly mixing alkaline silica sol, tetraethoxysilane, ethanol and water, adding organosilane, adding acetic acid to adjust the pH value to 5-6, and mixing for reaction to obtain the organic silicon modified silica sol.
3. The elastic waterproof nano-coating according to claim 2, wherein the organosilane is methyltrimethoxysilane or methyltriethoxysilane; the reaction time is 4-7 h.
4. The elastic waterproof nano paint as claimed in claim 2, wherein the mass ratio of the alkaline silica sol, the tetraethoxysilane, the ethanol, the water and the organosilane is (5-10): (1-2): (2-4): (10-15): (5-7).
5. The elastic waterproof nano-coating of claim 1, wherein the preparation method of the modified ceramic micro-powder is as follows:
s1, preparing polydopamine-coated ceramic micro powder: dispersing ceramic micro powder in water, adding dopamine hydrochloride, adding a Tris-HCl solution, heating for reaction, centrifuging, washing and drying to obtain polydopamine coated ceramic micro powder;
s2, preparing silicon dioxide nano powder: adding tetraethoxysilane into an ethanol water solution, adjusting the pH value of the solution to 5-6.5, heating for reaction to obtain sol, increasing the temperature of a heater, reducing the pressure to form dry gel, taking out, and igniting the dry gel to obtain silicon dioxide nano powder;
s3, preparing modified ceramic micro powder: and (4) uniformly dispersing the silicon dioxide nano powder prepared in the step (S2) in ethanol, adding the polydopamine-coated ceramic micro powder prepared in the step (S1) and acrylic emulsion, and heating, stirring and reacting to obtain the modified ceramic micro powder.
6. The elastic waterproof nano paint of claim 5, wherein the mass ratio of the ceramic micro powder, the dopamine hydrochloride and the Tris-HCl solution in the step S1 is 10: (12-15): (2-4); the pH value of the Tris-HCl solution is 5-6, the heating temperature is 40-60 ℃, and the reaction time is 2-4 h.
7. The elastic waterproof nano paint according to claim 5, wherein the concentration of ethanol in the ethanol aqueous solution in the step S2 is 30-50 wt%; the heating temperature is 30-50 ℃, the reaction time is 1-3h, the temperature of the heater is increased to 120-150 ℃, and the pressure is reduced to 0.01-0.1 MPa.
8. The elastic waterproof nano paint according to claim 5, wherein the mass ratio of the silica nano powder to the polydopamine-coated ceramic micro powder to the acrylic emulsion in step S3 is (7-12): 10: (3-7); heating to the temperature of 60-80 ℃, and reacting for 2-5 h; the acrylic emulsion is selected from at least one of Carboset AE-960, Carboset RPT 3030 and Carboset 26930.
9. A process for the preparation of an elastic waterproof nanocoating according to any one of claims 1 to 8, comprising the steps of: adding the film forming assistant, the defoaming agent and the dispersing agent into water, dispersing at a low speed for 10-20min, adding the modified silica sol and the modified ceramic micro powder, dispersing at a high speed for 30-50min, adding the emulsified asphalt into the system, and dispersing at a low speed for 10-20min to obtain the elastic waterproof nano coating.
10. The method as claimed in claim 9, wherein the rotation speed of the low-speed dispersion is 700r/min, and the rotation speed of the high-speed dispersion is 3000 r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210187019.6A CN114292537B (en) | 2022-02-28 | 2022-02-28 | Elastic waterproof nano coating and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210187019.6A CN114292537B (en) | 2022-02-28 | 2022-02-28 | Elastic waterproof nano coating and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114292537A true CN114292537A (en) | 2022-04-08 |
| CN114292537B CN114292537B (en) | 2022-09-23 |
Family
ID=80978363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210187019.6A Active CN114292537B (en) | 2022-02-28 | 2022-02-28 | Elastic waterproof nano coating and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114292537B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115873427A (en) * | 2022-10-10 | 2023-03-31 | 湖北兴瑞硅材料有限公司 | Preparation method of silicon dioxide aerogel/ceramic microbead composite hydrophobic heat-insulating coating |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101177596A (en) * | 2007-12-13 | 2008-05-14 | 同济大学 | Emulsion type organic silica pressure-sensitive gel and preparation method thereof |
| CN102614783A (en) * | 2012-03-27 | 2012-08-01 | 大连理工大学 | Method for preparing high-flux composite membrane from dopamine-modified nanometer material |
| CN105647157A (en) * | 2014-11-11 | 2016-06-08 | 江苏联禹智能工程有限公司 | Waterproofing material for buildings |
| CN107629595A (en) * | 2017-09-21 | 2018-01-26 | 苏州振振好新型建材科技有限公司 | A kind of high-elastic anticracking waterproof coating of exterior wall |
| CN107841221A (en) * | 2017-11-21 | 2018-03-27 | 清远市思晴新材料科技有限公司 | A kind of the third composite exterior wall of nanometer particle-modified silicon insulating moulding coating and preparation method thereof |
| CN110437685A (en) * | 2019-08-05 | 2019-11-12 | 陈军 | A kind of aqueous inorganic Ceramic Luminescence coating |
| CN112745726A (en) * | 2020-12-26 | 2021-05-04 | 广东龙湖科技股份有限公司 | High-performance organic-inorganic composite heat-reflection waterproof coating, and preparation method and application thereof |
-
2022
- 2022-02-28 CN CN202210187019.6A patent/CN114292537B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101177596A (en) * | 2007-12-13 | 2008-05-14 | 同济大学 | Emulsion type organic silica pressure-sensitive gel and preparation method thereof |
| CN102614783A (en) * | 2012-03-27 | 2012-08-01 | 大连理工大学 | Method for preparing high-flux composite membrane from dopamine-modified nanometer material |
| CN105647157A (en) * | 2014-11-11 | 2016-06-08 | 江苏联禹智能工程有限公司 | Waterproofing material for buildings |
| CN107629595A (en) * | 2017-09-21 | 2018-01-26 | 苏州振振好新型建材科技有限公司 | A kind of high-elastic anticracking waterproof coating of exterior wall |
| CN107841221A (en) * | 2017-11-21 | 2018-03-27 | 清远市思晴新材料科技有限公司 | A kind of the third composite exterior wall of nanometer particle-modified silicon insulating moulding coating and preparation method thereof |
| CN110437685A (en) * | 2019-08-05 | 2019-11-12 | 陈军 | A kind of aqueous inorganic Ceramic Luminescence coating |
| CN112745726A (en) * | 2020-12-26 | 2021-05-04 | 广东龙湖科技股份有限公司 | High-performance organic-inorganic composite heat-reflection waterproof coating, and preparation method and application thereof |
Non-Patent Citations (2)
| Title |
|---|
| 胡向阳等: "水性丙烯酸酯涂料改性的研究进展", 《材料保护》 * |
| 胡向阳等: "水性丙烯酸酯涂料改性的研究进展", 《材料保护》, no. 04, 15 April 2020 (2020-04-15), pages 143 - 148 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115873427A (en) * | 2022-10-10 | 2023-03-31 | 湖北兴瑞硅材料有限公司 | Preparation method of silicon dioxide aerogel/ceramic microbead composite hydrophobic heat-insulating coating |
| CN115873427B (en) * | 2022-10-10 | 2024-03-12 | 湖北兴瑞硅材料有限公司 | Preparation method of silica aerogel/ceramic microbead composite hydrophobic heat-insulating coating |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114292537B (en) | 2022-09-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103820072B (en) | Double-component silicone structural sealant for heat mirror hollow glass and preparation method thereof | |
| CN103483493A (en) | Silicone modified acrylic ester emulsion and preparation method thereof | |
| CN113683958B (en) | Environment-friendly water-based asphalt waterproof coating and preparation method thereof | |
| CN113667404B (en) | High-viscosity water-based asphalt waterproof coating and preparation method thereof | |
| CN102101960A (en) | High-hydroxy silicon-acrylate aqueous glass coating emulsion and synthesis method thereof | |
| CN107118650B (en) | Silica sol/polyacrylate emulsion containing hydroxyl-amino resin baking varnish and preparation method thereof | |
| CN101649153A (en) | Organic silicon modified acrylic ester aqueous wood lacquer latex and synthesizing method thereof | |
| CN1438289A (en) | Neutral silicone fire-retardent sealing glue and its preparing method | |
| CN107201159A (en) | A kind of cracking resistance, anti-dropout coating and preparation method | |
| CN114292537B (en) | Elastic waterproof nano coating and preparation method thereof | |
| CN112680003A (en) | Inorganic heat-insulating coating and preparation method thereof | |
| CN1177011C (en) | Neutral silicone sealant for stone material and making method thereof | |
| CN107868535A (en) | A kind of basalt fibre crack resisting coating and preparation method thereof | |
| CN114196274A (en) | Novel polymer cement waterproof coating and preparation method thereof | |
| CN113943533B (en) | High-permeability rubber asphalt waterproof coating and preparation method thereof | |
| CN110670414B (en) | Heat-resistant waterproof wallpaper and preparation method thereof | |
| CN114763459A (en) | High-toughness thermal-aging-resistant fluorescent sizing material after curing | |
| CN112521867B (en) | Low-modulus high-elasticity two-component silane modified polyether sealant and preparation method thereof | |
| CN107641402B (en) | Nano flame-retardant stone paint and preparation method thereof | |
| CN113755035B (en) | Epoxy silane modified nano alumina and polymer cement-based waterproof coating | |
| CN114456742A (en) | Ceramic tile crack beautifying agent and preparation method thereof | |
| CN108329762A (en) | Anti-cracking environment-friendly waterproof bonding material for roof and preparation method thereof | |
| CN110527031B (en) | Water-based acrylic emulsion for quick-drying sealant and preparation method thereof | |
| CN113652182A (en) | Macromolecule butyl self-adhesive waterproof coiled material and preparation method thereof | |
| CN111234686A (en) | Self-crosslinking acrylic polyurethane dispersion stone-like paint and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220908 Address after: No.61, Fuqiang Road, Hecheng Town, Heshan City, Jiangmen City, Guangdong Province, 529700 Applicant after: Guangdong paint color new material Co.,Ltd. Address before: 223800 Susu Industrial Park, Sucheng District, Suqian City, Jiangsu Province Applicant before: Chen Jun |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |