CN113278322B

CN113278322B - Stone-like paint and preparation method thereof

Info

Publication number: CN113278322B
Application number: CN202110594169.4A
Authority: CN
Inventors: 洪恩兰; 吴银虾
Original assignee: Xiamen Dongshun Coatings Co ltd
Current assignee: Xiamen Dongshun Coatings Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2022-07-26
Anticipated expiration: 2041-05-28
Also published as: CN113278322A

Abstract

The application relates to a stone-like paint and a preparation method thereof, wherein the stone-like paint comprises the following components in parts by weight: 430 parts of water 390-containing powder, 1.5-5.5 parts of dispersing agent, 1-5 parts of defoaming agent, 2-6 parts of preservative, 12-18 parts of rutile titanium dioxide, 50-120 parts of near-infrared reflection powder, 80-150 parts of heat insulation powder, 7-14 parts of cellulose, 1-4 parts of regulator, 2-10 parts of antibacterial agent, 2-8 parts of algaecide, 5-12 parts of antifreeze agent, 10-15 parts of film forming auxiliary agent, 300 parts of acrylic latex 230-containing powder, 8-12 parts of thickening agent and 80-130 parts of quartz sand. Based on the technical scheme, the sunlight reflectivity, weather resistance, water resistance, scrub resistance, corrosion resistance, high temperature resistance and color separation of the stone-like paint product can be obviously improved by regulating and controlling the components and the proportion thereof in the stone-like paint.

Description

Stone-like paint and preparation method thereof

Technical Field

The application relates to the technical field of coatings, in particular to a stone-like paint and a preparation method thereof.

Background

The stone-like paint is a thick wall surface decorative paint with natural and real color and decorative effect exactly like marble and granite. The decorative board is suitable for wall decoration of various buildings, and is particularly widely applied to outer walls of buildings, curved buildings and the like. Because the application environment of the stone-like paint is poor, particularly when the stone-like paint is used for an outer wall, the light, temperature and air environment are severe, and a paint film is easy to age and denature. In the prior art, the stone-like paint product has poor sunlight reflectivity, weather resistance and durability, and the use of the stone-like paint product in poor environmental conditions is influenced. Therefore, there is a need to provide an improved stone-like paint and a preparation method thereof to solve the problems in the prior art.

Disclosure of Invention

Aiming at the problems in the prior art, the application provides a stone-like paint and a preparation method thereof, and the specific technical scheme is as follows:

in a first aspect, the present application provides a stone-like paint, which comprises the following components in parts by weight: 430 parts of water 390-containing powder, 1.5-5.5 parts of dispersing agent, 1-5 parts of defoaming agent, 2-6 parts of preservative, 12-18 parts of rutile titanium dioxide, 50-120 parts of near-infrared reflection powder, 80-150 parts of heat insulation powder, 7-14 parts of cellulose, 1-4 parts of regulator, 2-10 parts of antibacterial agent, 2-8 parts of algaecide, 5-12 parts of antifreeze agent, 10-15 parts of film forming auxiliary agent, 300 parts of acrylic latex 230-containing powder, 8-12 parts of thickening agent and 80-130 parts of quartz sand.

In some embodiments, the near-infrared reflective powder comprises titanium dioxide particles having a particle size of 350-1200 nm.

In some embodiments, the titanium dioxide content of the near-infrared reflective powder is greater than or equal to 90%.

In some embodiments, the insulating powder comprises insulating powder particles having a particle size of 3.25 μm or less.

In some embodiments, the antimicrobial agent is a silver ion antimicrobial agent, and the total content of silver ions and silver in the antimicrobial agent is 1800mg/Kg or more.

In some embodiments, the thickener is an aqueous magnesium aluminum silicate dispersion having a concentration of 8-10%.

In some embodiments, the silica sand is 80-120 mesh silica sand.

In some embodiments, the stone-like paint comprises the following components in parts by weight: 400-420 parts of water, 2-4 parts of dispersing agent, 1-3 parts of defoaming agent, 3-5 parts of preservative, 15-18 parts of rutile titanium dioxide, 50-90 parts of reflection powder, 90-120 parts of heat insulation powder, 7-12 parts of cellulose, 1-4 parts of regulator, 2-6 parts of antibacterial agent, 2-5 parts of algaecide, 5-10 parts of antifreeze agent, 12-15 parts of film forming aid, 300 parts of acrylic emulsion 250, 8-12 parts of thickening agent and 80-110 parts of quartz sand.

In some embodiments, the stone-like paint comprises the following components in parts by weight: 416 parts of water 412-.

In another aspect, the present application provides a method for preparing a stone-like paint, comprising:

s1, adding 390-430 parts of water, 1.5-5.5 parts of dispersing agent, 1-5 parts of defoaming agent and 2-6 parts of preservative into a reaction kettle by weight part, stirring until the components are uniformly mixed, adding 12-18 parts of rutile titanium dioxide into the reaction kettle, and continuously stirring until the components are uniformly mixed;

s2, adding 50-120 parts by weight of near-infrared reflection powder and 80-150 parts by weight of heat insulation powder into the mixture obtained in the step S1, stirring the mixture evenly, then adding 7-15 parts by weight of cellulose, and continuing stirring the mixture evenly;

s3, adding 1-4 parts of regulator, 2-10 parts of antibacterial agent, 2-8 parts of algaecide, 5-12 parts of antifreeze agent and 10-15 parts of film-forming assistant into the mixture obtained in the step S2 by weight, and stirring uniformly;

s4, adding 230-300 parts of pure acrylic emulsion into the mixture obtained in the step S3 by weight part, uniformly stirring, adding 8-12 parts of thickening agent, continuously stirring until the mixture is uniform, adding 80-130 parts of quartz sand, and stirring until the stone-like paint is obtained.

The technical scheme of the application has the following technical effects:

the application provides a stone-like paint and a preparation method thereof, and by regulating and controlling the components and the proportion thereof in the stone-like paint, the sunlight reflectivity, weather resistance, water resistance, scrub resistance, corrosion resistance, high temperature resistance and color separation of a stone-like paint product can be obviously improved under the interaction and the matching of rutile titanium dioxide, near-infrared reflection powder, heat insulation powder, cellulose, an antibacterial agent, an anti-algae agent, a thickening agent and the like.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application.

For the following defined terms, these definitions shall be applied, unless a different definition is given in the claims or elsewhere in this specification. All numerical values, whether explicitly indicated or not, are herein defined as modified by the term "about". The term "about" generally refers to a range of values that one of ordinary skill in the art would consider equivalent to the recited value to produce substantially the same property, function, result, etc. A numerical range indicated by a low value and a high value is defined to include all numbers subsumed within the numerical range and all subranges subsumed within the numerical range.

The following introduces a stone-like paint provided by the application, which comprises the following components in parts by weight: 430 parts of water 390-containing powder, 1.5-5.5 parts of dispersing agent, 1-5 parts of defoaming agent, 2-6 parts of preservative, 12-18 parts of rutile titanium dioxide, 50-120 parts of near-infrared reflection powder, 80-150 parts of heat insulation powder, 7-14 parts of cellulose, 1-4 parts of regulator, 2-10 parts of antibacterial agent, 2-8 parts of algaecide, 5-12 parts of antifreeze agent, 10-15 parts of film forming auxiliary agent, 300 parts of acrylic latex 230-containing powder, 8-12 parts of thickening agent and 80-130 parts of quartz sand.

Based on the above embodiments, in some embodiments, the near-infrared reflective powder includes titanium dioxide particles having a particle size of 350-1200 nm. In some cases, the titanium dioxide particles have a particle size of 450-1150 nm. In one embodiment, the titanium dioxide particles with the particle size of 350-1200nm in the near-infrared reflective powder account for more than 70% to more than 90% of the whole titanium dioxide component, such as more than 70%, more than 75%, more than 80%, more than 85%, more than 90%, and the like. By regulating and controlling the particle size distribution of titanium dioxide particles, the scattering and reflecting capacity of the stone-like paint to near infrared light and visible light can be effectively improved. In particular, the crystalline form of the titanium dioxide particles may be rutile.

Under some circumstances, the surface of titanium dioxide particles is coated with a silicon dioxide layer or an alumina layer, the stability of the near-infrared reflection powder can be improved through outer coating, the weather resistance of the stone-like paint is further improved, particle agglomeration can be avoided, and the dispersion and mixing uniformity are facilitated.

In other embodiments, the near-infrared reflective powder comprises vanadium oxide particles and iron oxide particles in addition to the titanium dioxide particles with the particle size of 350-1200nm, wherein the average particle size of the vanadium oxide particles and the iron oxide particles can be 500-1000 nm. In some cases, the titanium dioxide particles, vanadium oxide particles, and iron oxide particles are all coated with a layer of silicon dioxide or aluminum oxide. The near-infrared reflecting powder with the components can improve the near-infrared scattering ability of the stone-like paint and can also improve the corrosion resistance of the stone-like paint.

It should be noted that the rutile titanium dioxide powder has a larger average particle size than the near-infrared reflective powder, has better covering power, and can improve the infrared scattering capability and simultaneously make the stone-like paint have better covering power and reduce the raw material cost by regulating and controlling the mass ratio of the rutile titanium dioxide powder and the near-infrared reflective powder.

In some embodiments, the thermal insulating powder includes thermal insulating powder particles having a particle size of 3.25 μm or less. The particle size of the heat-insulating powder is regulated to the magnitude order of the wavelength of visible light (380-760nm) and near infrared light (760-2500nm), so that the stone-like paint has outstanding sunlight reflectivity. The heat-insulating powder and the near-infrared reflection powder have good chemical stability and good reflectivity and temperature difference effect, and the near-infrared reflection powder and the heat-insulating powder are combined for use, so that the main waveband of sunlight can be well reflected, the excellent reflectivity from visible light to near-infrared light is realized, the excellent light reflectivity and heat insulation are cooperatively realized, the stone-like paint has excellent reflection function and heat insulation effect, the adhesive force, weather resistance, durability, scrubbing resistance, corrosion resistance and high temperature resistance of the stone-like paint are improved, and the mechanical property of the paint film is improved. And the heat insulation powder has good dispersibility and heat insulation property under the granularity, and can improve the uniformity and stability of the stone-like paint, so that the stone-like paint is not easy to layer.

In some embodiments, the particle size of 60% -90% of the heat-insulating powder particles in the heat-insulating powder is less than or equal to 3.25 μm, and the heat-insulating powder can reflect and diffract sunlight in a main waveband, so that heat energy is blocked from entering the base layer, and good heat-insulating performance and reflection performance are achieved. In some cases, the heat-insulating powder particles with the particle size of less than or equal to 3.25 microns comprise 10-20% of particles with the particle size of less than 0.5 micron, so that the heat-insulating powder particles can play a good role in reflecting ultraviolet rays and improve the aging resistance of products.

In some embodiments, the thermal insulating powder consists essentially of hollow glass beads and/or hollow ceramic beads, such as borosilicate hollow glass beads. In other embodiments, the heat insulating powder is one or more of aluminum oxide, magnesium oxide, titanium oxide, zinc oxide and molecular sieve. Or the heat-insulating powder comprises one or more than two of molecular sieve, alumina particles, magnesia particles, titanium oxide particles and zinc oxide particles besides the hollow glass beads and/or the hollow ceramic beads.

In some embodiments, the antimicrobial agent is a silver ion antimicrobial agent, and the total content of silver ions and silver in the antimicrobial agent is 1800mg/Kg or more, based on some or all of the above embodiments. Silver ion actives in the antimicrobial include, but are not limited to, silver nitrate and the like.

In some embodiments, the thickener is an aqueous magnesium aluminum silicate dispersion having a concentration of 8-10%. The magnesium aluminum silicate water dispersion is used as a thickening agent, and can be well coated on the surfaces of base paints with different colors, so that quartz sand is uniformly isolated, and an excellent color separation effect is achieved.

In some embodiments, the silica sand is 80-120 mesh silica sand. The granularity of the quartz sand is controlled within the range of 80-120 meshes, which is beneficial to spraying, surface glossiness and production cost reduction. In the present application, the ratio of the respective particle sizes of the silica sand may be such that 70% or more is 80 mesh, 10% or more is 90 mesh, and the balance is 90 mesh or more. Through the use of the thickening agent, the surface glossiness and the color effect of the quartz sand can be greatly improved, and the requirement on the particle size and the dosage of the quartz sand is further reduced.

In some embodiments, the cellulose is a modified cellulose. Specifically, the modified cellulose may be hydroxyethyl modified cellulose. By regulating the weight ratio of the cellulose, the fluidity and the stability of the stone-like paint can be improved, so that the stone-like paint is not easy to delaminate. In addition, as mentioned above, the addition of the heat insulating powder and the near-infrared reflecting powder in the particle size range and the proportion is beneficial to improving the layering phenomenon of the stone-like paint, so that the stability of the stone-like paint can be obviously improved and the layering can be avoided under the condition of a lower cellulose proportion, the water absorption of the stone-like paint is reduced, and the water resistance of the stone-like paint is effectively improved.

On the other hand, the application provides a preparation method of the stone-like paint, which comprises the following steps:

s1, adding 390-430 parts of water, 1.5-5.5 parts of dispersing agent, 1-5 parts of defoaming agent and 2-6 parts of preservative into a reaction kettle by weight part, stirring until the components are uniformly mixed, adding 12-18 parts of rutile titanium dioxide into the reaction kettle, and continuously stirring until the components are uniformly mixed.

In some embodiments, water, dispersant, defoamer, and preservative are slowly added to the reaction kettle in sequence, and stirred for 4-8 minutes under low speed stirring. Wherein, the rotation speed under the low-speed stirring condition can be 200-400 rpm. Then slowly adding the rutile titanium dioxide, and stirring for 8-15 minutes under the condition of medium-low speed stirring. Wherein, the rotation speed of the medium-low speed stirring condition can be 400-800 rpm.

And S2, adding 50-120 parts of near-infrared reflection powder and 80-150 parts of heat insulation powder into the mixture obtained in the step S1 in parts by weight, stirring uniformly, adding 7-15 parts of cellulose, and continuously stirring uniformly.

In some embodiments, the near infrared reflective powder and the thermal insulating powder are slowly added to the mixture of step S1, and stirred for 8-15 minutes under medium-low speed stirring. Then slowly adding the cellulose, and stirring for 20-30 minutes under the condition of high-speed stirring. Wherein, the rotation speed under the high-speed stirring condition can be 1200 and 1500 rpm.

S3, adding 1-4 parts of regulator, 2-10 parts of antibacterial agent, 2-8 parts of anti-algae agent, 5-12 parts of antifreeze agent and 10-15 parts of film-forming aid into the mixture obtained in the step S2 by weight parts, and stirring uniformly.

In some embodiments, the modifier, the antimicrobial agent, the anti-algae agent, the anti-freeze agent, and the coalescing agent are slowly dosed into the mixture of step S2 and stirred for 2-4 minutes under medium-low speed stirring conditions.

S4, adding 300 parts by weight of 230-acrylic emulsion into the mixture obtained in the step S3, uniformly stirring, adding 8-12 parts by weight of thickening agent, continuously stirring until the mixture is uniform, adding 80-130 parts by weight of quartz sand, and stirring until the stone-like paint is obtained.

In some embodiments, the acrylic emulsion is slowly added to the mixture of step S2 and stirred for 8-12 minutes under medium-low speed stirring. Then adding the thickener dissolved in advance for standby into a reaction kettle, and stirring for 15-20 minutes under the condition of medium-high speed stirring. Wherein, the rotation speed under the medium-high speed stirring condition can be 800-1200 rpm. Then slowly adding the quartz sand, and stirring for 15-20 minutes under the condition of medium-high speed stirring to obtain the stone-like paint.

In some embodiments, the pre-preparation process for the thickener is: adding 88-92 parts by weight of water into a pre-prepared reaction kettle, slowly adding 8-12 parts by weight of magnesium aluminum silicate into the water, and stirring for 60-90 minutes under the condition of high-speed stirring until the magnesium aluminum silicate is completely dispersed to obtain the magnesium aluminum silicate thickening agent.

In some embodiments, the parts by weight of each component in the above preparation method may also be: 400 portions of water, 420 portions of dispersing agent, 2-4 portions of defoaming agent, 1-3 portions of preservative, 3-5 portions of rutile titanium dioxide, 15-18 portions of reflective powder, 90-120 portions of heat-insulating powder, 7-12 portions of cellulose, 1-4 portions of regulator, 2-6 portions of antibacterial agent, 2-5 portions of algae-resisting agent, 5-10 portions of antifreeze agent, 12-15 portions of film-forming assistant, 300 portions of acrylic emulsion 250, 8-12 portions of thickening agent and 80-110 portions of quartz sand.

In some embodiments, the weight parts of the components in the above preparation method may also be: 416 parts of water 412-.

Some specific examples of the present specification are listed below based on the above technical solutions.

Example 1

The embodiment discloses a stone-like paint which comprises the following components in parts by weight: 390 parts of water, 2 parts of dispersing agent, 2 parts of defoaming agent, 3 parts of preservative, 14 parts of rutile titanium dioxide, 60 parts of near-infrared reflection powder, 90 parts of heat insulation powder, 7 parts of cellulose, 2 parts of regulator, 2.5 parts of antibacterial agent, 2 parts of anti-algae agent, 6 parts of antifreeze agent, 10 parts of film-forming assistant, 230 parts of acrylic emulsion, 8 parts of thickening agent and 80 parts of quartz sand.

Specifically, the content of titanium dioxide in the near-infrared reflecting powder is more than or equal to 90 percent. The near-infrared reflection powder comprises titanium dioxide particles with the particle size of 350-1200 nm.

Specifically, the titanium dioxide particles with the particle size of 350-1200nm in the near-infrared reflection powder account for more than 70 percent of the whole titanium dioxide component. The surface of the titanium dioxide particles is coated with a silicon dioxide layer or an aluminum oxide layer.

Specifically, the heat-insulating powder comprises heat-insulating powder particles with the particle size of less than or equal to 3.25 mu m. Specifically, the particle size of 60-90% of the heat-insulating powder particles in the heat-insulating powder is less than or equal to 3.25 mu m.

Specifically, the heat insulating powder mainly comprises hollow glass beads and/or hollow ceramic beads, wherein the hollow glass beads comprise borosilicate hollow glass beads.

Specifically, the antibacterial agent is a silver ion antibacterial agent, and the total content of silver ions and silver in the antibacterial agent is more than or equal to 1800 mg/Kg.

Specifically, the thickening agent is magnesium aluminum silicate water dispersion liquid, and the concentration of the magnesium aluminum silicate water dispersion liquid is 8-10%.

Specifically, the quartz sand is 80-120 meshes of quartz sand. The quartz sand color and particle size may be selected based on appearance requirements.

Specifically, the cellulose is modified cellulose.

Specifically, the pure acrylic emulsion is acrylic ester modified or epoxy resin modified pure acrylic emulsion.

Specifically, the antifreeze includes Dow glycol and the like.

Specifically, the regulator is ammonia water or potassium bicarbonate.

Specifically, the film-forming aid is Ismanol ester twelve.

Example 2

The embodiment discloses a stone-like paint which comprises the following components in parts by weight: 400 parts of water, 2 parts of a dispersing agent, 2 parts of a defoaming agent, 3 parts of a preservative, 15 parts of rutile titanium dioxide, 70 parts of near-infrared reflection powder, 90 parts of heat insulation powder, 9 parts of cellulose, 3 parts of a regulator, 2.5 parts of an antibacterial agent, 2.5 parts of an anti-algae agent, 7 parts of an antifreeze agent, 11 parts of a film-forming assistant, 230 parts of a acrylic emulsion, 8 parts of a thickening agent and 90 parts of quartz sand.

Specifically, the particle size of the titanium dioxide particles is 450-1150 nm. The titanium dioxide particles with the particle size of 450-1150nm in the near-infrared reflection powder account for more than 70 percent of the whole titanium dioxide component. The surface of the titanium dioxide particles is coated with a silicon dioxide layer or an aluminum oxide layer.

Specifically, the heat insulating powder comprises heat insulating powder particles with the particle size of less than or equal to 3.25 mu m. Specifically, the particle size of 60-90% of the heat insulating powder particles in the heat insulating powder is less than or equal to 3.25 μm. The heat insulating powder comprises hollow glass beads and/or hollow ceramic beads and a molecular sieve.

Specifically, the thickener is magnesium silicate aluminum water dispersion liquid, and the concentration of the magnesium silicate aluminum water dispersion liquid is 8-10%.

Specifically, the quartz sand is 80-120 meshes of quartz sand.

Specifically, the cellulose is hydroxyethyl modified cellulose.

Specifically, the antifreeze agent includes Dow glycol and the like.

Specifically, the regulator is ammonia water or potassium bicarbonate.

Specifically, the film-forming aid is Ismanol ester twelve.

Example 3

The embodiment discloses a stone-like paint which comprises the following components in parts by weight: 415 parts of water, 2 parts of a dispersing agent, 3 parts of a defoaming agent, 4 parts of a preservative, 15 parts of rutile titanium dioxide, 70 parts of reflecting powder, 100 parts of heat insulating powder, 12 parts of cellulose, 2 parts of a regulator, 3 parts of an antibacterial agent, 3 parts of an anti-algae agent, 8 parts of an anti-freezing agent, 12 parts of a film forming auxiliary agent, 250 parts of a pure acrylic emulsion, 8 parts of a thickening agent and 100 parts of quartz sand.

Specifically, the near-infrared reflective powder comprises titanium dioxide particles with the particle size of 350-1200 nm. The titanium dioxide particles with the particle size of 350-1200nm in the near-infrared reflection powder account for more than 80 percent of the whole titanium dioxide component.

Specifically, the surface of the titanium dioxide particles is coated with a silicon dioxide layer or an aluminum oxide layer, and the content of the titanium dioxide in the near-infrared reflection powder is more than or equal to 90%.

Specifically, the heat insulation powder comprises heat insulation powder particles with the particle size of less than or equal to 3.25 microns, and specifically, the particle size of 60% -90% of the heat insulation powder particles in the heat insulation powder is less than or equal to 3.25 microns.

Specifically, the heat-insulating powder mainly comprises hollow glass beads and/or hollow ceramic beads, such as borosilicate hollow glass beads.

Specifically, the quartz sand is 80-120 meshes.

Specifically, the cellulose is a modified cellulose, for example, hydroxyethyl-modified cellulose.

Specifically, the antifreeze agent includes Dow glycol and the like.

Specifically, the regulator is ammonia water or potassium bicarbonate.

Specifically, the coalescing agent is Ismanol ester twelve.

Example 4

The embodiment discloses a stone-like paint which comprises the following components in parts by weight: 420 parts of water, 4 parts of a dispersing agent, 3 parts of a defoaming agent, 5 parts of a preservative, 17 parts of rutile titanium dioxide, 80 parts of reflecting powder, 110 parts of heat insulation powder, 11 parts of cellulose, 3 parts of a regulator, 4 parts of an antibacterial agent, 4 parts of an anti-algae agent, 8 parts of an antifreeze agent, 14 parts of a film forming aid, 270 parts of a acrylic emulsion, 10 parts of a thickening agent and 110 parts of quartz sand.

Specifically, the near-infrared reflective powder comprises titanium dioxide particles with the particle size of 350-1200nm, and the titanium dioxide particles with the particle size of 350-1200nm account for more than 90 percent of the whole titanium dioxide component.

Specifically, the heat-insulating powder comprises heat-insulating powder particles with the particle size of less than or equal to 3.25 mu m. Specifically, the particle size of 60-90% of the heat-insulating powder particles in the heat-insulating powder is less than or equal to 3.25 mu m. The heat-insulating powder particles with the particle diameter of less than or equal to 3.25 mu m comprise 10-20% of particles with the particle diameter of less than 0.5 mu m. The heat-insulating powder mainly comprises hollow glass beads and/or hollow ceramic beads, such as borosilicate hollow glass beads, and one or more of molecular sieve, alumina particles, magnesia particles, titanium oxide particles and zinc oxide particles.

Specifically, the antifreeze agent includes Dow glycol and the like.

Specifically, the regulator is ammonia water or potassium bicarbonate.

Specifically, the coalescing agent is Ismanol ester twelve.

Example 5

The embodiment discloses a stone-like paint which comprises the following components in parts by weight: 430 parts of water, 5.5 parts of dispersing agent, 4 parts of defoaming agent, 5 parts of preservative, 18 parts of rutile titanium dioxide, 120 parts of reflecting powder, 150 parts of heat-insulating powder, 13 parts of cellulose, 4 parts of regulator, 5 parts of antibacterial agent, 6 parts of anti-algae agent, 10 parts of antifreeze agent, 15 parts of film-forming assistant, 280 parts of acrylic emulsion, 12 parts of thickening agent and 130 parts of quartz sand.

Specifically, the near-infrared reflective powder comprises titanium dioxide particles with the particle size of 350-1200 nm. The titanium dioxide particles with the particle size of 350-1200nm in the near-infrared reflection powder account for more than 70 percent of the whole titanium dioxide component.

Specifically, the near-infrared reflective powder comprises vanadium oxide particles and iron oxide particles besides titanium dioxide particles with the particle size of 350-1200nm, wherein the average particle size of the vanadium oxide particles and the iron oxide particles can be 500-1000 nm.

Specifically, the heat insulating powder comprises heat insulating powder particles with the particle size of less than or equal to 3.25 mu m. Specifically, the particle size of 60-90% of the heat insulating powder particles in the heat insulating powder is less than or equal to 3.25 μm. The thermal insulating powder comprises hollow glass beads and/or hollow ceramic beads, such as borosilicate hollow glass beads.

In some embodiments, the thickener is an aqueous magnesium aluminum silicate dispersion having a concentration of 8-10%. The magnesium silicate aluminum water dispersion is used as a thickening agent, and can be well coated on the surfaces of base paints with different colors, so that quartz sand is uniformly isolated, and an excellent color separation effect is realized.

Specifically, the quartz sand is 80-120 meshes. The quartz sand color and particle size may be selected based on appearance requirements.

Specifically, the cellulose is modified cellulose.

Specifically, the antifreeze agent includes Dow glycol and the like.

Specifically, the regulator is ammonia water or potassium bicarbonate.

Specifically, the coalescing agent is Ismanol ester twelve.

Comparative example 1

The comparative example discloses a stone-like paint which comprises the following components in parts by weight: 390 parts of water, 2 parts of dispersing agent, 2 parts of defoaming agent, 3 parts of preservative, 70 parts of rutile titanium dioxide, 90 parts of heat insulation powder, 7 parts of cellulose, 2 parts of regulator, 2.5 parts of antibacterial agent, 2 parts of anti-algae agent, 6 parts of antifreeze agent, 10 parts of film forming additive, 230 parts of acrylic emulsion, 8 parts of thickening agent and 80 parts of quartz sand.

The properties and parameters of the components are similar to those in example 1, and are not described again.

Comparative example 2

The comparative example discloses a stone-like paint which comprises the following components in parts by weight: 390 parts of water, 2 parts of dispersing agent, 2 parts of defoaming agent, 3 parts of preservative, 14 parts of rutile titanium dioxide, 60 parts of near-infrared reflecting powder, 7 parts of cellulose, 2 parts of regulator, 2.5 parts of antibacterial agent, 2 parts of anti-algae agent, 6 parts of anti-freezing agent, 10 parts of film-forming assistant, 230 parts of acrylic emulsion, 8 parts of thickening agent and 80 parts of quartz sand.

Comparative example 3

The comparative example discloses a stone-like paint which comprises the following components in parts by weight: 390 parts of water, 2 parts of dispersing agent, 2 parts of defoaming agent, 3 parts of preservative, 14 parts of rutile titanium dioxide, 60 parts of near-infrared reflection powder, 90 parts of heat insulation powder, 7 parts of cellulose, 2 parts of regulator, 2.5 parts of antibacterial agent, 2 parts of anti-algae agent, 6 parts of antifreeze agent, 10 parts of film-forming assistant, 230 parts of acrylic emulsion, 8 parts of thickening agent and 80 parts of quartz sand.

Wherein, the grain diameter of the heat insulating powder particles in the heat insulating powder is more than 90 percent and is more than or equal to 5.5 mu m.

The properties and parameters of the remaining components are similar to those of example 1 and are not described in detail herein.

Comparative example 4

The comparative example discloses a stone-like paint which comprises the following components in parts by weight: 390 parts of water, 2 parts of dispersing agent, 2 parts of defoaming agent, 3 parts of preservative, 14 parts of rutile titanium dioxide, 60 parts of near-infrared reflecting powder, 90 parts of heat insulating powder, 7 parts of cellulose, 2 parts of regulator, 2.5 parts of antibacterial agent, 2 parts of anti-algae agent, 6 parts of antifreeze agent, 10 parts of film forming additive, 230 parts of acrylic emulsion, 8 parts of thickening agent and 80 parts of quartz sand.

Wherein, the grain diameter of the heat insulating powder particles in the heat insulating powder is more than 80% and less than or equal to 0.3 μm.

Comparative example 5

The comparative example discloses a stone-like paint which comprises the following components in parts by weight: 390 parts of water, 2 parts of dispersing agent, 2 parts of defoaming agent, 3 parts of preservative, 14 parts of rutile titanium dioxide, 60 parts of near-infrared reflecting powder, 90 parts of heat insulating powder, 7 parts of cellulose, 2 parts of regulator, 2 parts of anti-algae agent, 6 parts of anti-freezing agent, 10 parts of film forming additive, 230 parts of acrylic emulsion, 8 parts of thickening agent and 80 parts of quartz sand.

Comparative example 6

The comparative example discloses a stone-like paint which comprises the following components in parts by weight: 390 parts of water, 2 parts of dispersing agent, 2 parts of defoaming agent, 3 parts of preservative, 14 parts of rutile titanium dioxide, 60 parts of near-infrared reflecting powder, 90 parts of heat insulating powder, 7 parts of cellulose, 2 parts of regulator, 2.5 parts of antibacterial agent, 6 parts of antifreeze agent, 10 parts of film forming additive, 230 parts of acrylic emulsion, 8 parts of thickening agent and 80 parts of quartz sand.

Comparative example 7

Wherein the thickening agent is an alkali swelling thickening agent, and the properties and parameters of the rest components are similar to those of the embodiment 1, and are not described again.

Comparative example 8

The comparative example discloses a stone-like paint which comprises the following components in parts by weight: 390 parts of water, 2 parts of dispersing agent, 2 parts of defoaming agent, 3 parts of preservative, 14 parts of rutile titanium dioxide, 60 parts of near-infrared reflection powder, 90 parts of heat insulation powder, 3 parts of cellulose, 2 parts of regulator, 2.5 parts of antibacterial agent, 2 parts of anti-algae agent, 6 parts of antifreeze agent, 10 parts of film-forming assistant, 230 parts of acrylic emulsion, 8 parts of thickening agent and 80 parts of quartz sand.

Comparative example 9

The comparative example discloses a stone-like paint which comprises the following components in parts by weight: 390 parts of water, 2 parts of dispersing agent, 2 parts of defoaming agent, 3 parts of preservative, 14 parts of rutile titanium dioxide, 60 parts of near-infrared reflection powder, 90 parts of heat insulation powder, 20 parts of cellulose, 2 parts of regulator, 2.5 parts of antibacterial agent, 2 parts of anti-algae agent, 6 parts of antifreeze agent, 10 parts of film-forming assistant, 230 parts of acrylic emulsion, 8 parts of thickening agent and 80 parts of quartz sand.

The stone-like paints obtained in the above examples and comparative examples are used to form a film coating, and corresponding performance tests are performed, so that the stone-like paint products obtained in examples 1-5 show outstanding solar reflectivity, antibacterial property and anti-algae property, have excellent adhesion, weather resistance, durability, scrub resistance, corrosion resistance and high temperature resistance, do not have discoloration and whitening phenomena in an aging and raining test, have good stability and mechanical properties, and do not have delamination and turbidity after being placed for 90 days. In addition, the stone-like paint product has good particle dispersibility and color separation, clear colors and soft color. Some of the test data are shown in the tables below.

Watch 1

The test methods in Table I refer to IEC 62321-4:2013+ A1:2017, IEC 62321-5:2013, IEC62321-7-2:2017, IEC 62321-6:2015 and IEC 62321-8:2017, and are analyzed by ICP-OES, UV-Vis and GC-MS. The maximum allowable limit value is referred to from RoHS directive (EU) 2015/863. The IEC62321 series is equivalent to the EN 62321 series. The test results in examples 1-5 all met the limit requirements.

Watch 2

The verification criteria in Table two are JG/T235-2014 and HG/T4343-2012, and the determination criteria are JG/T235-2014. The lightness standard refers to JG/T235-2014 reflecting and insulating coating for buildings in Table 1, and the high-brightness product (flower color, lightness value L ═ 90). The aging test conditions are 340nm irradiance and 0.51w/m ² Relative humidity (40-60)%, black standard temperature (65 +/-60) DEG C, and a rain cycle of 18min/102min (water spraying time/water non-spraying time).

Watch III

In the third table, the detection basis is GB/T1741-2007, and the stone-like paint products in examples 1-5 show excellent antibacterial performance and anti-mold performance.

No near-infrared reflection powder and no heat insulation powder are added in the comparative example 1 and the comparative example 2 respectively, the solar reflectivity is poor, all the reflectance parameters are obviously inferior to those of the stone-like paint products of the examples 1-5, and the performance aging is obvious under the same test conditions. Comparative examples 3 and 4, in which the heat insulating powder having a particle size parameter that is too high or too low was added, have a great difference from those of examples 1 to 5, although the solar reflectance and aging resistance of the products were improved to some extent.

The stone-like paint products of examples 1-5 exhibited excellent antibacterial and anti-algal properties, all of which were of grade 0 for each of the molds in table three. Comparative example 5, in which no antibacterial agent was added, had an antibacterial rate significantly lower than that of examples 1 to 5, and all showed significant mold growth. In the comparative example 6, no algaecide is added, the paint film has slight growth of algae after 30 days, the algae resistant grade is grade 2, and the algae resistant performance standard refers to GB 21353-2008. In addition, the products of examples 1-5 had higher aldehyde removal rate and TVOC purification efficiency.

The stone-like paint products of examples 1-5 had good particle dispersibility and color-blocking properties, clear colors, soft color, good monodispersity, and large particles. The stone-like paint product of comparative example 7 had smaller particles, blurred color boundaries and poor color separation.

The cellulose concentration in comparative example 8 was low and the water resistance was similar to that of the products of examples 1-5, but the stability was poor and significant delamination occurred after 90 days of storage. The cellulose concentration in comparative example 9 was high, the water resistance was significantly reduced, and the discoloration and whitening phenomenon occurred in the aging rain test.

In conclusion, the stone-like paint and the preparation method thereof provided by the application can obviously improve the sunlight reflectivity, weather resistance, water resistance, scrubbing resistance, corrosion resistance, high temperature resistance and color separation of a stone-like paint product under the interaction and matching of rutile titanium dioxide, near-infrared reflection powder, heat insulation powder, cellulose, an antibacterial agent, an algaecide, a thickening agent and the like by regulating and controlling the components and the proportion thereof in the stone-like paint.

The foregoing description has disclosed fully embodiments of the present application. It should be noted that those skilled in the art will be able to make modifications to the embodiments of the present application without departing from the scope of the appended claims. Accordingly, the scope of the claims of the present application is not to be limited to the particular embodiments described above.

Claims

1. The stone-like paint is characterized by comprising the following components in parts by weight:

420 parts of water, 4 parts of a dispersing agent, 3 parts of a defoaming agent, 5 parts of a preservative, 17 parts of rutile titanium dioxide, 80 parts of near-infrared reflection powder, 110 parts of heat insulation powder, 11 parts of modified cellulose, 3 parts of a regulator, 4 parts of a silver ion antibacterial agent, 4 parts of an anti-algae agent, 8 parts of an antifreeze agent, 14 parts of a film forming auxiliary agent, 270 parts of a acrylic emulsion, 10 parts of a thickening agent and 110 parts of 80-120-mesh quartz sand;

the content of titanium dioxide in the near-infrared reflection powder is more than or equal to 90 percent, the titanium dioxide particles with the particle size of 350-1200nm account for more than 90 percent of the whole titanium dioxide component in the near-infrared reflection powder, and the surfaces of the titanium dioxide particles are coated with a silicon dioxide layer or an alumina layer; the heat insulation powder comprises hollow glass beads and/or hollow ceramic beads, wherein 60-90% of heat insulation powder particles in the heat insulation powder have the particle size of less than or equal to 3.25 mu m, and 10-20% of heat insulation powder particles with the particle size of less than or equal to 3.25 mu m comprise particles with the particle size of less than 0.5 mu m;

the total content of silver ions and silver in the silver ion antibacterial agent is more than or equal to 1800 mg/Kg; the thickening agent is a magnesium silicate aluminum water dispersion liquid with the concentration of 8-10%; the pure acrylic emulsion is acrylic ester modified or epoxy resin modified pure acrylic emulsion; the antifreeze agent comprises Dow glycol; the regulator is ammonia water or potassium bicarbonate; the film-forming auxiliary agent is Ismanol ester twelve.

2. A preparation method of stone-like paint is characterized by comprising the following steps:

s1, adding 420 parts of water, 4 parts of dispersing agent, 3 parts of defoaming agent and 5 parts of preservative into a reaction kettle in parts by weight, stirring until the mixture is uniformly mixed, adding 17 parts of rutile titanium dioxide into the reaction kettle, and continuously stirring until the mixture is uniformly mixed;

s2, adding 80 parts by weight of near-infrared reflection powder and 110 parts by weight of heat insulation powder into the mixture obtained in the step S1, stirring the mixture uniformly, adding 11 parts by weight of modified cellulose, and continuing stirring the mixture uniformly;

s3, adding 3 parts of regulator, 4 parts of silver ion antibacterial agent, 4 parts of algaecide, 8 parts of antifreeze and 14 parts of film-forming assistant into the mixture obtained in the step S2 by weight, and stirring uniformly;

s4, adding 270 parts by weight of pure acrylic emulsion into the mixture obtained in the step S3, uniformly stirring, adding 10 parts by weight of thickening agent, continuously stirring until the mixture is uniform, adding 110 parts by weight of 80-120-mesh quartz sand, and stirring to obtain the stone-like paint;

wherein the content of titanium dioxide in the near-infrared reflection powder is more than or equal to 90 percent, titanium dioxide particles with the particle size of 350-1200nm account for more than 90 percent of the whole titanium dioxide component in the near-infrared reflection powder, and the surfaces of the titanium dioxide particles are coated with a silicon dioxide layer or an alumina layer; the heat insulation powder comprises hollow glass beads and/or hollow ceramic beads, wherein 60-90% of heat insulation powder particles in the heat insulation powder have the particle size of less than or equal to 3.25 mu m, and 10-20% of heat insulation powder particles with the particle size of less than or equal to 3.25 mu m comprise particles with the particle size of less than 0.5 mu m;