CN114605876B - Sand-coated sand colorful stone-like coating with sunlight heat reflection and heat insulation functions and preparation method thereof - Google Patents
Sand-coated sand colorful stone-like coating with sunlight heat reflection and heat insulation functions and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a sand-coated sand colorful stone-like coating with solar photothermal reflection heat insulation, which is formed by five stages of a colloidal solution, a gel solution, a granulation base paint, a granulation sub-paint and a finished product paint, and comprises the specific components and parts by weight of each part. The paint forms a paint film after natural drying, has the capability of sunlight reflection and heat insulation performance, can effectively control the surface temperature of a paint system, improves the thermal comfort of the environment, and saves energy. The paint also has the capabilities of good weather resistance, stain resistance, water resistance, chemical resistance and color retention, and the workability, stirring property, transportation property, anti-settling property, particle crushing resistance and overall storage stability of the paint are excellent; and has the characteristics of flexibility, durability of paint color particles, environmental protection, energy conservation and the like.
Description
Technical Field
The invention relates to the technical field of reflective heat-insulating coatings for buildings, and particularly discloses a sunlight heat-reflective heat-insulating sand-coated sand colorful stone-like coating and a preparation method thereof.
Background
In the building field, new materials, environment-friendly materials, fireproof materials, green energy materials and reusable materials are continuously removed and updated, so that the requirements on coating of interior and exterior wall coatings are higher and higher, and various high-performance and even functional coatings are generated. In addition, building energy conservation is one of the key points of energy-saving work in China, and external wall external heat preservation becomes a main product of building energy conservation. For areas mainly used for heat preservation in thermal engineering design, such as severe cold areas and cold areas, external wall external heat preservation is reasonable, applicable and fast in development.
The coating which is coated on the surface to be constructed and can play a role in heat insulation is called heat insulation coating, and is divided into transparent heat insulation coating and non-transparent heat insulation coating according to different use occasions; according to the heat insulation mechanism, the heat insulation coating can be divided into 3 types of barrier heat insulation coating, reflective heat insulation coating and radiation heat insulation coating.
Zhangzhou Sandeli paint limited has disclosed a solar photo-thermal reflection heat insulation water-in-water multicolor environment-friendly paint and a production method thereof in patent ZL 201410363026.2, wherein the paint can perform heat reflection on sunlight and can insulate heat. But the type of the coating is still 'water-in-water' coating, and a three-dimensional decorative surface is difficult to form; the patent ZL201810115044.7 discloses a solar photo-thermal reflection heat insulation sand-in-water multicolor environment-friendly coating and a production method thereof. However, the construction method has the disadvantages of more material consumption, higher cost, incapability of realizing one-time spraying and forming during construction and higher construction labor cost; and other comprehensive performance effects can not be effectively reflected in the sand-in-sand coating.
In order to meet the higher and higher coating requirements of the inner and outer wall coatings, save cost, reduce material consumption, realize simple and quick construction and reduce pollution to the surrounding environment of construction, the sand-in-sand type coating continuously emerges. The invention relates to a sand-in-sand stone-like coating and a preparation method thereof, which belong to the patent CN 111848010A. The invention discloses a CN111138113A sand-in-sand stone-like coating which comprises water, a bactericide, a powdery thickener, a dispersant, an antifoaming agent, a film forming aid, propylene glycol, a pH regulator, a film forming material, a liquid thickener, sintered colored sand, a crosslinking agent and a protective adhesive. The invention discloses a water-based sand-in-sand multicolor paint disclosed by CN111018474A, which relates to the technical field of paint preparation and comprises a sand-containing base material, a continuous phase and second-stage sand preparation, wherein the sand-containing base material is as follows: water, cellulose ether, a functional additive, titanium dioxide, kaolin, sand, a pure acrylic emulsion, a film forming additive and silica sol, wherein the continuous phase is as follows: water, functional assistant, silicone-acrylic emulsion and propylene glycol. The invention discloses a sand-coated sand colorful interior and exterior wall building coating and a preparation method thereof in patent CN110668734A, relating to the field of building coatings, wherein the formula comprises granulating agents, cellulose, pH value regulators, bactericides, inorganic bentonite, antifreezing agents, film forming additives, granulating emulsion, sand, emulsion, dispersing agents and titanium dioxide; the preparation method comprises the steps of preparing white base paint, preparing a granulating agent system, preparing granules, preparing real stone paint and preparing a finished product.
However, the above patent technologies have the following problems: firstly, the production method comprises the steps of preparing 5-10% of protective colloid solution, then preparing white sand-containing base paint, adding color paste according to design requirements for color mixing, then preparing a granulating agent system, further performing color paint granulation, reproducing real stone paint, and finally mixing and stirring the granulated paint and the real stone paint to prepare the sand-in-sand coating, and the production method is complex in process, low in production efficiency and not beneficial to industrial mass production. In addition, the stirring and dispersing equipment or the screen type granulation adopted by the granulation causes that the particle size is not uniform enough during the granulation, thereby affecting the beautiful appearance and the construction performance of the coating film. Secondly, the coating cannot embody the functions of reflection, heat insulation and heat preservation, common pigment and filler and common sand are used in the coating, so that the coating is poor in effect of blocking solar radiation energy, cannot further block residual solar radiation energy permeating into a wall body, cannot achieve the effect of reflection and heat insulation of the coating, does not have the heat preservation function or is poor in heat preservation function, and cannot well guarantee other comprehensive properties.
Disclosure of Invention
The invention aims to provide the sand-coated sand colorful stone-like coating capable of forming a three-dimensional decorative surface, emitting sunlight, insulating heat, efficiently preserving heat, having good comprehensive performance, simple preparation process, low cost and simple and quick construction.
The invention also aims to provide a method for preparing the sand-coated sand colorful environment-friendly coating with the sunlight heat reflection heat insulation effect, which has the advantages of simple preparation process, large-scale industrial production, three-dimensional decorative surface formation, sunlight emission heat insulation, high-efficiency heat insulation, low cost, simple and quick construction, lower construction material consumption than that of stone paint and sand-in-water, and great reduction of the overall cost of the building stone-like coating.
The coating adopts the coating suspension and anti-melting technology, and the pigment and filler coating and the color sand coating are manufactured in three steps and two steps in the continuous phase and the finished paint, so that the dot patterns similar to the water-coated sand colorful coating and the sand textured coating (real stone paint) are generated, the technical performance and the decorative effect of the product are improved, the production flow is simplified, and the production cost is reduced. The coating is prepared by adding gelable water-soluble nano CICP pigment ceramic heat insulation powder into a modified acrylic copolymer to prepare coated particles, mixing the coated particles with hollow glass microspheres and colored sand, and preventing the three components from damaging the structure due to mutual impact when the three components are mixed and stored in the same container, so that the effects of long-term storage stability and simple and convenient construction are achieved.
The invention provides a solar photo-thermal reflection heat insulation sand-coated sand colorful stone-like coating which comprises the following specific components in parts by weight: 250-280 parts of modified acrylic copolymer, 120-180 parts of tap water, 10-14 parts of film forming agent, 12-16 parts of propylene glycol, 0.5-1 part of defoaming agent, 2-3 parts of preservative, 3-5 parts of thickening agent, 50-70 parts of natural colored sand and 700-750 parts of particle-making paint; the particle-making paint comprises 850-1100 parts of granulation base paint, 50-70 parts of natural colored sand and 15-25 parts of hollow glass beads; the granulation base paint comprises 200-250 parts of tap water, 2-3 parts of inorganic thickener, 6-10 parts of wetting dispersant, 4-9 parts of defoaming agent, 3-5 parts of film forming agent, 60-80 parts of ceramic heat insulation powder, 5-10 parts of modified bentonite, 8-10 parts of auxiliary agent, 250-300 parts of modified acrylic copolymer, 50-80 parts of natural colored sand, 70-100 parts of hollow glass microsphere, 40-50 parts of nano infrared reflection pigment CICP, 100-150 parts of colloidal solution and 80-100 parts of gel solution; the colloidal solution is 90-100 parts of tap water, 2 parts of crosslinking stabilizer and 7-8 parts of protective rubber powder; the gel solution is 90-100 parts of tap water, 0.2-0.3 part of hydroxyethyl cellulose and 2-3 parts of gel.
Preferably, the crosslinking stabilizer is sodium pyrophosphate, which can ensure that the colloid keeps fluidity; the protective rubber powder is magnesium lithium silicate, and can improve the suspension property, thixotropy and chemical stability of colloid.
Preferably, the hydroxyethyl cellulose is obtained by using high-purity cotton cellulose as a raw material, performing alkali treatment and performing professional etherification, is a nonionic surfactant, has good splashing resistance, and is beneficial to improving the construction efficiency and saving the coating.
Preferably, the gel is an emulsion type gel which is processed by natural, semi-synthetic and synthetic polymer materials by adopting an advanced biological polymerization technology.
The gel is a natural bioactive, water-retaining and oil-retaining active auxiliary agent, effectively improves the workability, stirring property, transportation property, anti-settling property, particle crushing resistance and overall storage stability of the coating, and can also improve the elasticity and flexibility of the coating. The natural colored sand is added in the paint, and the sand grains are easy to sink in the paint and are easy to collide with each other in the construction, transportation and stirring processes due to inherent weight and rigidity of the natural colored sand, so that particles in the paint are broken or damaged due to mutual collision of the particles, the gel solution prepared by using the gel agent is used for improving the anti-settling property of the paint and the anti-crushing property of the particles, but the effect is not obvious when the gel agent is directly added into the granulation base paint.
Preferably, the inorganic thickener is a modified montmorillonite thickener, a gel mineral which absorbs water and expands to form thixotropy, has fine particle size, can be easily dispersed in an aqueous system by using conventional high-speed dispersing equipment, has a special gel net structure, enhances the coating performance, has excellent sagging resistance, excellent suspension property and orientation arrangement property, has excellent moisture resistance and thixotropic lubricity compared with hydroxyethyl cellulose, is used for replacing the hydroxyethyl cellulose, has the functions of thickening, water retention, suspension, lubrication and orientation arrangement, overcomes the defects of easy mildew, degradation, poor water resistance and the like of the cellulose, has unchanged rheological property during heating, reduces the viscosity change of the coating caused by temperature, and obviously improves the workability, lubricity and storage stability of a product over the use of the cellulose.
Preferably, the wetting and dispersing agent is selected from one or more of sodium polyacrylate, trisodium phosphate, silicate, alkylphenol ethoxylates and alkyl aryl sulfonate, has a surface amphiphilic molecular structure, performs qualitative adsorption in the interface direction, reduces the surface tension of the liquid, and has the function of dispersing fine-particle pigments and fillers in the base material.
The defoaming agent is selected from one or more of modified polysiloxane and organic alcohol compounds.
The film forming agent is one or more than two of polyesterol, polyvinyl alcohol, sodium alginate and xanthan gum, which is also called as coalescence assistant agent, and can promote the plastic flow and elastic deformation of high molecular compound, improve coalescence performance and harden the coating in a wider application temperature range.
Preferably, the ceramic heat insulating powder is a composite heat insulating material manufactured by introducing ceramic particles, whiskers, fibers, and the like into a ceramic matrix to improve the performance of ceramics. The color glass has the characteristics of extremely small particle size, large specific surface area, high chemical performance, low tinting strength, high sunlight reflectivity and the like, has little influence on the original color when being applied to a color system, can obviously reduce the surface temperature of an object, and improves the reflection and heat insulation effects of sunlight.
Preferably, the modified bentonite is a deep-processed product modified by bentonite, so that a new hydrophobic and oleophilic organic bentonite complex is generated, and particles in the coating are hydrophobic and are not compatible any more.
Preferably, the auxiliary agent is one or more of a multifunctional pH regulator, a preservative, an anti-freezing stabilizer and a thickening agent. The thickening agent is an emulsion type thickening agent of hydrophobically modified acrylate cross-linked copolymer, has the double advantages of water-soluble macromolecules and formation of association network, has higher thickening ratio and proper rheological property, and has excellent thickening effect on various emulsion copolymer dispersions and aqueous solution systems.
Thickening agents are respectively added into the granulation base paint and the finished product paint, so that the effect and the protection object are different, and the inorganic thickening agent is added into the granulation base paint to protect the particles, so that the stability of the particles is improved, and the functional effect of the particles is better; the finished paint is protected by adding the thickening agent, so that the appearance coating function effect is better; the whole system of the coating can be better protected and protected by bidirectional targeted addition.
Preferably, the preservative means a natural or synthetic chemical component that can retard the decay of the coating due to microbial growth or chemical changes caused by external factors; may be one or more of benzoic acid and its salt, benzyl alcohol, hydroxyphenyl ester, sorbic acid and chloroxylenol. The anti-freeze stabilizer can play a role in preventing frost and stabilizing storage, and propylene glycol is preferred.
Preferably, the modified acrylic copolymer is a two-in-one aqueous multicolor emulsion synthesized by adopting a polymerization control technology and a two-way extraction technology, and is inert when mixed with protective glue by controlling the distribution of surface charges and polar hydrophobic chain segments of emulsion particles, so that the modified acrylic copolymer has excellent stability, weather resistance, permeability, water resistance, water-white recovery, high hardness and super-strong adhesive force, and can provide an excellent sand-in-sand granulation effect. Because the sand-coated sand colorful stone-like coating adopts the modified acrylic copolymer as a main film forming substance, the comprehensive performance of the final finished paint is greatly improved, and the sanded sand colorful stone-like coating is economical, convenient and fast, and preferably Badfu RS-8699.
Preferably, the natural colored sand is prepared by processing marble or granite and other ores through multiple working procedures of selection, crushing, grading, packaging and the like, and has the characteristics of firmness, wear resistance, water resistance, corrosion resistance, no toxicity, strong bonding force, gorgeous color and the like.
Preferably, the hollow glass bead is a novel ultra-light inorganic non-metal material which is hollow round ball powder, has excellent performance and wide application, becomes the mainstream of a novel composite material in the twenty-first century, and has the particle size of about 2-125 um; the heat-insulating coating has the characteristics of light weight, small heat conduction coefficient and heat shrinkage coefficient, high compressive strength, high heat reflectivity, low oil absorption rate, good dispersity and fluidity, high chemical stability and the like, is a high-quality filler of the heat-insulating coating, and greatly improves the heat-insulating property of the coating.
Preferably, the nano infrared reflection pigment is one or more than two of rutile titanium dioxide or a composite inorganic pigment CICP of Meng Tena meter-level.
More preferably, the grade-Meng Tena composite inorganic pigment CICP is one or more selected from YE608/YE607 titanium nickel yellow, BR602/BR604 titanium chrome yellow, BU612/BU614/BU616 cobalt blue, BU716 cobalt blue, GC705 cobalt green, GT700 titanium cobalt green, YB626 titanium manganese brown, BF611 iron manganese black, BK711 copper chrome black, BC812 chromium iron black and BR402 chromium iron brown produced by Nanjing Pemont science and technology Limited.
The composite inorganic pigment CICP of Meng Tena meter level is prepared by calcining and mixing at high temperature, crushing in an air convection manner and cutting, is a high-performance high-environment-friendly composite inorganic pigment, and has the advantages of excellent weather resistance, chemical resistance, high temperature resistance, easy dispersion, strong thermal stability, excellent tinting strength and covering power. And SGS detection shows that the indexes of lead, cadmium, mercury and hexavalent chromium reach EU ROHS instruction, and the environmental protection standard of Japan SONY is met. The coating can also effectively improve the solar photo-thermal reflection efficiency, can reduce the surface temperature of a system when used in the coating, has the effects of heat insulation, environmental protection and energy conservation, improves the thermal comfort of the environment, and saves energy.
The sand-coated colorful stone-like coating with the sun light and heat reflection heat insulation function adopts the modified acrylic copolymer as a main body, and forms a paint film after natural drying, so that the coating has good weather resistance, stain resistance, water resistance, chemical resistance and color retention capability; the addition of the functional auxiliary agent can further improve the performance of the coating, such as storage stability, construction performance, flexibility, durability of color particles of the coating and the like. Secondly, the novel nano-scale infrared reflection pigment CICP and the ceramic heat insulation powder are added into the coating, so that the coating has the sunlight reflection capability, the surface temperature of a coating system can be effectively controlled, and the effects of reflection heat insulation, environmental protection and energy conservation are achieved. And thirdly, the coating uses hollow glass beads which are single hollow spheres with thin walls, have the effect similar to double-layer glass, have heat reflection and heat insulation performance, can further obstruct residual solar radiation energy penetrating into a wall body and can insulate heat, greatly improve the heat insulation performance of the coating, improve the thermal comfort of the environment and save energy. Fourthly, different metals in the nano-scale infrared reflective pigment CICP can form different colors after being melted at high temperature according to different proportions, and the colorful sand-in-sand colorful stone-like coating with the functions of color heat reflection, heat insulation and heat preservation is prepared, so that the market colorful requirements are met, and the decorative effect is improved. Fifthly, the coating has low cost and simple preparation process, and is suitable for large-scale industrial production; the construction is simple and quick, the coating can be formed once, the consumption of construction materials is low, and the coating is economical and convenient; sixthly, the coating has excellent effects of resisting sand splashing and preventing air mist diffusion in construction, and is beneficial to further reducing the pollution to the construction surrounding environment; finally, the paint disclosed by the invention is good in three-dimensional decoration effect, good in paint film appearance, colorful and bright in color, good in weather resistance, water resistance and chemical resistance and excellent in water-white recovery.
The invention also finds that the raw materials adopt the formula of the modified acrylic copolymer, the nano infrared reflection pigment CICP, the ceramic heat insulation powder, the modified bentonite, the hollow glass micro-beads and the natural colored sand, and has a synergistic effect, the modified acrylic copolymer can improve the comprehensive performance of the final coating, and can interact with the ceramic heat insulation powder, the nano infrared reflection pigment CICP, the hollow glass micro-beads and the natural colored sand during granulation, so that the particles are slightly convex outwards to form a hollow effect similar to double-layer glass, and the hollow glass micro-beads are single hollow spheres with thin walls, and have heat reflection, heat insulation and heat preservation performances, thereby further improving the heat reflection, heat insulation and heat preservation effects of the coating. Secondly, when sunlight irradiates on the coating, the nano infrared reflective pigment CICP and the ceramic heat-insulating powder in the coating have the functions of reflection and heat insulation, the sunlight heat reflection heat-insulating efficiency can be improved, the surface temperature of a coated object system is reduced, the heat absorption of the coated object is weakened, and the coating contains hollow glass beads, so that the residual sunlight radiation energy penetrating into a wall body can be further blocked, the heat aggregation of the coating is further reduced, the heat emitted to the surrounding environment by the coated object is greatly reduced, the heat-insulating effect is more obvious, the utilization rate of an air conditioner is fundamentally reduced, meanwhile, the heat can be preserved in winter, the use of a heat-insulating heat source is reduced, and the energy consumption is greatly reduced.
In addition, the sunlight heat reflection heat insulation water-coated sand multicolor environment-friendly coating can be used together with water-based building coatings, such as inner and outer wall putty, anti-crack mortar, inner and outer wall primer, inner and outer wall coatings and the like, and can be used together with reflection heat insulation coatings such as outer heat insulation putty and the like if the residual radiation energy is further blocked and the reflection heat insulation effect is improved.
The invention also provides a production method of the sand-coated colorful environment-friendly stone-like coating with sunlight heat reflection, heat insulation and heat preservation, which comprises the following steps:
1. preparation of colloidal solution: adding 90-100 parts by weight of tap water and 2 parts by weight of crosslinking stabilizer into a first mixing container under stirring, adding 7-8 parts by weight of protective rubber powder after the crosslinking stabilizer is completely dissolved in the tap water, and stirring until the aqueous solution is fully dissolved to be transparent and clear; after preparation, the solution is preferably used after being left to stand for 24 hours in a room-temperature dry place.
2. Preparation of gel solution: adding 90-100 parts by weight of tap water, 0.2-0.3 part by weight of hydroxyethyl cellulose and 2-3 parts by weight of gel into a second mixing container under stirring, and stirring until the aqueous solution is fully dissolved.
3. Preparation of granulation base paint: adding 200-250 parts by weight of tap water into a third mixing container, adding 2-3 parts by weight of an inorganic thickener to disperse until no particles exist under stirring, sequentially adding 6-10 parts by weight of a wetting dispersant, 4-9 parts by weight of a defoaming agent, 3-5 parts by weight of a film forming agent and 8-10 parts by weight of an auxiliary agent, adding 5-10 parts by weight of modified bentonite, 60-80 parts by weight of ceramic heat insulating powder and 40-50 parts by weight of a nano infrared reflection pigment CICP after uniform stirring, dispersing at high speed until the fineness is qualified, adding 50-80 parts by weight of natural colored sand, 70-100 parts by weight of hollow glass microspheres and 250-300 parts by weight of a modified acrylic copolymer under stirring, and stopping after uniform and full dispersion. Adding 100-150 parts by weight of colloidal solution into the same mixing container, standing for 10-15min, uniformly granulating, and adding 80-100 parts by weight of gel solution; standing for 5-10min, adding 50-70 parts by weight of natural colored sand and 15-25 parts by weight of hollow glass beads, and fully and uniformly stirring to obtain the particle-making paint.
4. Preparing a finished paint: adding 120-180 parts by weight of tap water into a fourth mixing container, adding 250-280 parts by weight of modified acrylic copolymer while stirring, adding 10-14 parts by weight of film forming agent, 0.5-1 part by weight of defoaming agent, 12-16 parts by weight of propylene glycol, 2-3 parts by weight of preservative and 50-70 parts by weight of natural colored sand, uniformly stirring, adding 700-750 parts by weight of particle-making paint, and finally adjusting the viscosity of the system to 95-100 ku by using 3-5 parts by weight of thickening agent.
Preferably, the mixing container is a paint preparation tank, an 11-15KW high-speed variable frequency stirrer is adopted for stirring, and the stirring speed is 1500-2000 rpm when the colloidal solution is prepared; adding protective rubber powder, and stirring for 15-20min; when the gel solution is prepared, the stirring speed is 1500-2000 rpm, and the stirring time is 10-15min.
Preferably, when preparing the granulation base paint, the stirring speed of tap water and the inorganic thickener is 1000-1500 revolutions per minute, the dispersion is carried out for 5-8min until no particles exist, the stirring speed is increased to 2000-2500 revolutions per minute after the powder is added, the high-speed dispersion is carried out until the fineness is qualified, namely, the fineness is less than or equal to 30 mu m, the stirring time is 25-30min, the speed is 800-1000 revolutions per minute when the modified acrylic copolymer is added, and the stirring is carried out for 20-25min. Adding natural color sand and hollow glass beads at 1000-1200 rpm, stirring for 25-30min in summer, and stirring for 40-50min in winter.
Preferably, when the finished paint is prepared, the stirring speed is 600-800 revolutions per minute; after the uniform stirring, a dispersion plate is used, and more preferably, a dispersion plate such as a stick type or a paddle type dispersion plate with low shearing force is used, and the dispersion plate is a utility model patent technology which can refer to the patents of the applicant in ZL 2014 2 0861869.0 and ZL 2014 2 0862077.5.
The construction method of the sand-coated sand colorful stone-like coating with sunlight heat reflection and heat insulation comprises the following steps:
1. preparation work:
the sand-coated sand colorful stone-like coating with sunlight heat reflection, heat insulation and heat preservation can be directly sprayed for construction without adding water, and an air spraying mode is adopted; firstly, before the coating is sprayed, a corresponding base coat is used as a matching, such as a seal primer, putty, anti-cracking mortar, a water-based engineering primer and the like; if the painted surface has oil stain, dust, dirt and other sundries, a steel wire brush or sand paper is used for removing the sundries, and if the painted surface has unevenness such as honeycomb, crack, hollowing and the like, the painted surface is repaired and leveled by outer wall putty, and construction can be carried out after drying. Secondly, before construction, windowsills, door edges, trees, certain ground and other places which are possibly contaminated are protected and covered by plastic films;
2. spraying the coating:
the coating is evenly sprayed by a special spray gun (one-time forming); during the construction, the matching of air pressure and nozzle caliber should be paid attention to so as to enable the coating to be uniformly applied, and the conditions such as the caliber of a spray gun, air pressure and the like need to be tested in advance aiming at the pattern of the coating film, and then a large amount of spraying is carried out. During spraying, the operation of the spray gun needs to be kept at a certain speed and a certain distance, and the spray nozzle needs to be kept parallel to a spraying surface. The tail end of the spraying is preferably positioned at the joint pointing part, and when the spraying is continued, the spraying is carried out when the spraying is not dried, and if the spraying is carried out after the spraying is dried, fine particles are easily overlapped, so that the appearance is influenced; the same area is preferably coated once, i.e. the coating is performed as much as possible when the base surface is not dried.
Further, it should be noted that: the coating is not stirred forcibly, other substances cannot be mixed in, water is not added for dilution, and the coating after opening the tank is used up for one time as much as possible; after the working procedure construction is finished for one day, removing the covering plastic film for protection, and cleaning and clearing the relevant parts and the ground; the curing process needs natural air drying for seven days.
The invention has the following beneficial effects:
1. the modified acrylic copolymer is adopted as a main body, and a paint film is formed after natural drying, so that the paint film has good stability, weather resistance, stain resistance, water-white recovery resistance of water resistance and chemical resistance; the addition of the functional auxiliary agent can further improve the performance of the coating, such as storage stability, construction performance, flexibility, durability of paint color particles and the like. The novel nano-scale infrared reflection pigment CICP and the ceramic heat insulation powder are added into the coating, so that the coating has the capability of sunlight reflection, the surface temperature of a coating system can be effectively controlled, and the effects of reflection heat insulation, environmental protection and energy conservation are achieved. The hollow glass beads are used in the coating, are single hollow spheres with thin walls, have the effect similar to double-layer glass, have heat reflection and heat insulation performance, can further block residual solar radiation energy penetrating into a wall body and can insulate heat, greatly improve the heat insulation performance of the coating, improve the thermal comfort of the environment and save energy.
2. The addition of the gelling agent effectively improves the workability, the stirring property, the transportation property, the anti-settling property, the particle crushing resistance and the overall storage stability of the coating, and also can greatly improve the elasticity and the flexibility of the coating layer of the coating.
3. The formula of the modified acrylic copolymer, the nano infrared reflection pigment CICP, the ceramic heat insulation powder, the modified bentonite, the hollow glass beads and the natural colored sand is adopted, the synergistic effect is achieved, the modified acrylic copolymer can improve the comprehensive performance of the final coating, and can interact with the ceramic heat insulation powder, the nano infrared reflection pigment CICP, the hollow glass beads and the natural colored sand during granulation, so that the particles are slightly convex outwards, the hollow effect similar to double-layer glass is formed, and the hollow glass beads are single hollow spheres with thin walls and have heat reflection heat insulation performance, so that the heat reflection heat insulation effect of the coating is further improved.
4. The coating has low cost and simple preparation process, and is suitable for large-scale industrial production; the construction is simple and quick, the coating can be formed once, the consumption of construction materials is low, and the coating is economical and convenient; the effects of sand splashing resistance and air mist diffusion resistance in construction are excellent, and the pollution to the construction surrounding environment is further reduced.
5. The paint disclosed by the invention has the advantages of good three-dimensional decoration effect, good paint film appearance, colorful and bright color, good weather resistance and chemical resistance and excellent water-white recovery.
Detailed Description
The present invention will be further clearly understood from the specific examples and comparative examples of the present invention given below, which are not intended to limit the present invention. The parts of the specific examples and comparative examples not described in detail were obtained using prior art, well known technical means and industry standards.
Unless otherwise indicated, the techniques employed in the examples are conventional and well known to those skilled in the art, and the reagents and products employed are also commercially available. The source and trade names of the reagents used are indicated for the first time, with the necessary listing of the components.
All percentages used in the present invention are by weight unless otherwise indicated.
Example 1
The formula of the sand-coated sand colorful stone-like coating with sunlight heat reflection and heat insulation comprises the following components:
the paint is formed by five stages of colloid solution, gel solution, granulation base paint, granulation sub-paint and finished paint, and the specific components and parts by weight of each part are as follows: 1. the colloid solution comprises the following components in parts by weight: 100 parts of tap water, 2 parts of a crosslinking stabilizer and 8 parts of protective rubber powder; 2. the gel solution comprises the following components in parts by weight: 96 parts of tap water, 0.2 part of hydroxyethyl cellulose and 2 parts of gel; 3. the granulation base paint comprises the following components in parts by weight: 200 parts of tap water, 2 parts of inorganic thickener, 8 parts of wetting dispersant, 6 parts of defoamer, 4 parts of film forming agent, 70 parts of ceramic heat insulation powder, 6 parts of modified bentonite, 1 part of pH regulator, 2 parts of preservative, 5 parts of anti-freezing stabilizer, 280 parts of modified acrylic copolymer (RS-8699), 60 parts of natural colored sand, 90 parts of hollow glass microsphere, 35 parts of nano CICP pigment, 10 parts of titanium dioxide, 120 parts of colloidal solution and 90 parts of gel solution; 4. the granulating paint comprises the following components in parts by weight: 980 parts of granulation base paint, 50 parts of natural colored sand and 20 parts of hollow glass beads; 5. the finished paint comprises the following components in parts by weight: 250 parts of modified acrylic copolymer (RS-8699), 120 parts of tap water, 12 parts of film forming agent, 14 parts of propylene glycol, 0.5 part of defoaming agent, 2 parts of preservative, 60 parts of natural colored sand, 700 parts of particle-making paint (with various colors) and 4 parts of thickening agent.
The production method of the sand-coated sand colorful stone-like coating with sunlight heat reflection and heat insulation comprises the following steps:
1. preparing a colloidal solution: adding 100 parts by weight of tap water and 2 parts by weight of crosslinking stabilizer into a paint preparation tank, stirring while adding, stirring by adopting an 11kw high-speed variable frequency stirrer at the rotating speed of 1500 revolutions per minute, adding 8 parts by weight of protective rubber powder after stirring until the protective rubber powder is completely dissolved in the tap water, stirring at the same rotating speed until the aqueous solution is fully dissolved to be transparent and clear, and stirring for about 20 minutes;
2. preparing a gel solution: adding 96 parts by weight of tap water, 0.2 part by weight of hydroxyethyl cellulose and 2 parts by weight of gelling agent into another paint preparation tank, stirring while stirring at the rotating speed of 1600 revolutions per minute until the aqueous solution is fully dissolved, and stirring for about 12 minutes;
3. preparing granulation base paint: adding 200 parts by weight of tap water into a new paint preparation tank, stirring while adding 2 parts by weight of an inorganic thickener, dispersing until no particles exist, stirring for about 6 minutes, sequentially wetting 8 parts by weight of a dispersant, 6 parts by weight of a defoaming agent, 4 parts by weight of a film forming agent, 1 part by weight of a pH regulator, 2 parts by weight of a preservative and 5 parts by weight of an anti-freezing stabilizer, adding 6 parts by weight of modified bentonite, 70 parts by weight of heat insulating powder, 35 parts by weight of a nanoscale CICP pigment and 10 parts by weight of titanium dioxide, stirring uniformly, increasing the stirring speed to 2200 revolutions per minute, dispersing at a high speed until the fineness is less than or equal to 30um, stirring for about 25 minutes, adding 60 parts by weight of natural colored sand, 90 parts by weight of hollow glass microspheres and 280 parts by weight of a modified acrylic copolymer (RS-8699), and stirring until the stirring uniformly, wherein the stirring speed is 900 revolutions per minute until the mixture is uniformly dispersed for about 20 minutes;
4. particle-making paint: putting 120 parts by weight of 1 part of colloidal solution into a paint preparation tank of the step 3, standing for 10 minutes, uniformly granulating according to the size of required colored particles, then adding 90 parts by weight of 2 parts of gel solution, 50 parts of natural colored sand and 20 parts of hollow glass beads, uniformly stirring at the stirring speed of 1000 rpm in summer for 25 minutes in winter, and stirring for 45 minutes in winter;
5. preparing a finished paint: adding 120 parts by weight of tap water into a new paint preparation tank, stirring at the rotating speed of 600 revolutions per minute of a stirrer, adding 12 parts by weight of a film forming agent, 14 parts by weight of propylene glycol, 0.5 part by weight of an antifoaming agent, 2 parts by weight of a preservative and 250 parts by weight of a modified acrylic copolymer (RS-8699), uniformly stirring, then using a special dispersion disc (a dispersion disc with low shearing force, such as a stick type or a paddle type), adding 700 parts by weight of the particle-making paint with various required colors and 60 parts by weight of natural colored sand, adjusting the viscosity to 95ku by using 4 parts by weight of a thickening agent, and discharging and packaging.
The construction method of the sand-coated sand colorful stone-like coating with sunlight heat reflection and heat insulation comprises the following steps:
1. preparation work:
the sand-coated sand colorful stone-like coating with sunlight heat reflection, heat insulation and heat preservation can be directly sprayed for construction without adding water, and an air spraying mode is adopted; firstly, before the coating is sprayed, a corresponding base coat is used as a matching, such as a seal primer, putty, anti-cracking mortar, a water-based engineering primer and the like; if the painted surface has oil stain, dust, dirt and other impurities, a steel wire brush or abrasive paper is used for removing the impurities, and if the painted surface has the unevenness phenomena of honeycomb, crack, hollowing, depression and the like, the painted surface is repaired and leveled by outer wall putty, and the painted surface can be constructed after being dried. Secondly, before construction, windowsills, door edges, trees, certain ground and other places which are possibly contaminated are protected and covered by plastic films;
2. spraying the coating:
the coating is evenly sprayed by a special spray gun (one-time forming); during construction, the matching of air pressure and nozzle caliber should be paid attention to so as to enable uniform coating, and it is necessary to test the conditions of spray gun caliber, air pressure and the like in advance for the pattern of the coating film and then spray a large amount of coating. During spraying, the operation of the spray gun needs to be kept at a certain speed and a certain distance, and the spray nozzle needs to be kept parallel to a spraying surface. The tail end of the spraying is preferably positioned at the joint pointing part, and when the spraying is continued, the spraying is carried out when the spraying is not dried, and if the spraying is carried out after the spraying is dried, fine particles are easily overlapped, so that the appearance is influenced; the same area is preferably coated once, i.e. the coating is completed once, so that the base surface is coated once when the base surface is not dried.
Example 2
The procedure of this example is essentially the same as example 1, and the formulation adjustments are detailed in table 1.
Example 3
The procedure of this example is essentially the same as example 1, and the formulation adjustments are detailed in table 1.
Comparative example 1
The formulation ratio of this comparative example is essentially the same as that of example 1, but the preparation method is not accompanied by the step of preparing a "gel solution" nor by the addition of a gel solution to the base paint for granulation.
Comparative example 2
The procedure of this comparative example is essentially the same as in example 1, the formulation proportions are adjusted as detailed in Table 1, with the major differences that: no hollow glass microspheres and no thickener in the finished paint.
Comparative example 3
The procedure of this comparative example is essentially the same as comparative example 1, and the formulation ratio adjustment is detailed in table 1. There are also major differences in that: no infrared reflection pigment is added, and the addition amount of the ceramic heat insulation powder is reduced.
TABLE 1 formulation proportions
Table 2 results of performance testing
As shown in the performance test results of examples 1 to 3 shown in Table 2, the coating has good storage stability, mechanical and physical properties, chemical properties, weather resistance, workability, sunlight reflectance, near infrared reflectance, heat insulation temperature difference and other properties; in reverse from the results of the performance tests of comparative examples 1 to 3 given in table 2, the coating presented varying degrees of problems in the above described properties without the addition of gel solution, hollow glass microspheres, thickener and infrared reflective pigment. The above examples are for the best formulation configuration (but not limited thereto), as for the comparative example, the elimination or reduction of any material in the formulation will have an undesirable effect on the performance of the coating.
The above description is only for the specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be covered within the protection scope of the present invention.
Claims (10)
1. The solar photo-thermal reflection heat insulation sand-coated sand colorful stone-like coating is characterized in that: the paint is formed by five stages of colloid solution, gel solution, granulation base paint, granulation sub-paint and finished paint, wherein the finished paint comprises the following specific components in parts by weight: 250-280 parts of modified acrylic copolymer, 120-180 parts of tap water, 10-14 parts of film forming agent, 12-16 parts of propylene glycol, 0.5-1 part of defoaming agent, 2-3 parts of preservative, 3-5 parts of thickening agent, 50-70 parts of natural colored sand and 700-750 parts of granulating paint; the particle-making paint is composed of 850-1100 parts by weight of granulation base paint, 50-70 parts by weight of natural colored sand, 15-25 parts by weight of hollow glass beads, 100-150 parts by weight of colloidal solution and 80-100 parts by weight of gel solution; the granulation base paint comprises 200-250 parts by weight of tap water, 2-3 parts by weight of inorganic thickening agent, 6-10 parts by weight of wetting dispersant, 4-9 parts by weight of defoaming agent, 3-5 parts by weight of film forming agent, 60-80 parts by weight of ceramic heat insulation powder, 5-10 parts by weight of modified bentonite, 8-10 parts by weight of auxiliary agent, 250-300 parts by weight of modified acrylic copolymer, 50-80 parts by weight of natural colored sand, 70-100 parts by weight of hollow glass microsphere and 40-50 parts by weight of nano infrared reflection pigment CICP; the colloidal solution comprises 90-100 parts by weight of tap water, 2 parts by weight of cross-linking stabilizer and 7-8 parts by weight of protective rubber powder; the gel solution comprises 90-100 parts by weight of tap water, 0.2-0.3 part by weight of hydroxyethyl cellulose and 2-3 parts by weight of gel; the gel is an emulsion type gel which is processed by natural, semisynthetic and synthetic polymer materials through a biological polymerization technology; the modified acrylic copolymer is a two-in-one aqueous multicolor emulsion synthesized by adopting a polymerization control technology and a bidirectional extraction technology.
2. The sand-coated sand colorful stone-like coating for solar photothermal reflection heat insulation according to claim 1, which is characterized in that: the crosslinking stabilizer is sodium pyrophosphate; the hydroxyethyl cellulose is a nonionic surfactant obtained by etherifying high-purity cotton cellulose after alkali treatment; the inorganic thickener is a modified montmorillonite thickener.
3. The sand-coated sand colorful stone-like coating for solar photothermal reflection heat insulation according to claim 1, which is characterized in that: the wetting dispersant is one or more than two of sodium polyacrylate, trisodium phosphate, silicate, alkylphenol polyoxyethylene ether and alkyl aryl sulfonate ； The defoaming agent is one or more than two of modified polysiloxane and organic alcohol compounds; the film forming agent is one or more than two of polyesterol, polyvinyl alcohol, sodium alginate and xanthan gum; the ceramic heat-insulating powder is a composite heat-insulating material manufactured by introducing ceramic particles, whiskers and fibers into a ceramic matrix; the modified bentonite is a hydrophobic oleophilic organic bentonite complex modified by bentonite.
4. The sand-coated colorful stone-like coating with characteristics of solar photothermal reflection, heat insulation and sand coating according to claim 1, wherein the coating comprises: the auxiliary agent is one or a combination of a plurality of multifunctional pH regulators, preservatives, anti-freezing stabilizers and thickening agents; the thickening agent is an emulsion-type thickening agent of a hydrophobically modified acrylate cross-linked copolymer; the preservative is one or more than two of benzoic acid and salts thereof, benzyl alcohol, hydroxybenzene esters, sorbic acid and chloroxylenol; the anti-freezing stabilizer is propylene glycol.
5. The sand-coated sand colorful stone-like coating for solar photothermal reflection heat insulation according to claim 1, which is characterized in that: the natural colored sand is prepared by processing marble or granite ores through the procedures of selection, crushing, grading and packaging; the particle size of the hollow glass bead is 2-125 μm.
6. The sand-coated sand colorful stone-like coating for solar photothermal reflection heat insulation according to claim 1, which is characterized in that: the nano-scale infrared reflection pigment CICP is one or more than two of YE608/YE607 titanium nickel yellow, BR602/BR604 titanium chrome yellow, BU612/BU614/BU616 cobalt blue, BU716 cobalt blue, GC705 cobalt green, GT700 titanium cobalt green, YB626 titanium manganese brown, BF611 iron manganese black, BK711 copper chrome black, BC812 chromium iron black and BR402 chromium iron brown produced by Nanjing Pegmont science and technology company Limited.
7. The method for preparing the sand-in-sand colorful stone-like coating with the sun light heat reflection heat insulation and preservation functions as claimed in any one of claims 1 to 6, is characterized in that: the method comprises the following steps:
(1) Preparation of colloidal solution: adding 90-100 parts by weight of tap water and 2 parts by weight of crosslinking stabilizer into a first mixing container under stirring, adding 7-8 parts by weight of protective rubber powder after the crosslinking stabilizer is completely dissolved in the tap water, and stirring until the aqueous solution is fully dissolved to be transparent and clear; after preparation, the solution is used after being placed in a room with normal temperature and dryness for 24 hours;
(2) Preparation of gel solution: adding 90-100 parts by weight of tap water, 0.2-0.3 part by weight of hydroxyethyl cellulose and 2-3 parts by weight of gelling agent into a second mixing container under stirring, and stirring until the aqueous solution is fully dissolved;
(3) Preparation of granulation base paint: adding 200-250 parts by weight of tap water into a third mixing container, adding 2-3 parts by weight of an inorganic thickener under stirring to disperse until no particles exist, sequentially adding 6-10 parts by weight of a wetting dispersant, 4-9 parts by weight of a defoaming agent, 3-5 parts by weight of a film forming agent and 8-10 parts by weight of an auxiliary agent, adding 5-10 parts by weight of modified bentonite, 60-80 parts by weight of ceramic heat insulating powder and 40-50 parts by weight of a nano infrared reflection pigment CICP after uniformly stirring, dispersing at a high speed until the fineness is qualified, namely, is less than or equal to 30 mu m, adding 50-80 parts by weight of natural colored sand, 70-100 parts by weight of hollow glass microspheres and 250-300 parts by weight of a modified acrylic copolymer under stirring, and stopping after fully and uniformly dispersing;
(4) Preparing a particle-forming paint: adding 100-150 parts by weight of colloidal solution into the same mixing container, standing for 10-15min, uniformly granulating, and adding 80-100 parts by weight of gel solution; standing for 5-10min, adding 50-70 parts by weight of natural colored sand and 15-25 parts by weight of hollow glass beads, and fully and uniformly stirring to obtain the particle-making paint;
(5) Preparing a finished paint: adding 120-180 parts by weight of tap water into a fourth mixing container, adding 250-280 parts by weight of modified acrylic copolymer while stirring, adding 10-14 parts by weight of film forming agent, 0.5-1 part by weight of defoaming agent, 12-16 parts by weight of propylene glycol, 2-3 parts by weight of preservative and 50-70 parts by weight of natural colored sand, uniformly stirring, adding 700-750 parts by weight of particle-making paint, and finally adjusting the viscosity of the system to 95KU-100KU by using 3-5 parts by weight of thickening agent.
8. The preparation method of the sand-coated sand colorful stone-like coating with solar photothermal reflection heat insulation and preservation functions as claimed in claim 7, is characterized in that: the mixing container is a paint preparation tank, a high-speed variable frequency stirrer is adopted for stirring, and the stirring speed is 1500-2000 rpm when the colloidal solution is prepared; adding protective rubber powder, and stirring for 15-20min; when the gel solution is prepared, the stirring speed is 1500-2000 rpm, and the stirring time is 10-15min.
9. The preparation method of the sand-coated sand colorful stone-like coating with solar photothermal reflection heat insulation and preservation functions as claimed in claim 7, is characterized in that: when preparing the granulation base paint, stirring the tap water and the inorganic thickener at the rotating speed of 1000-1500 revolutions per minute, dispersing for 5-8min until no particles exist, adding the powder, then stirring at the rotating speed of 2000-2500 revolutions per minute, dispersing at a high speed until the fineness is qualified, namely less than or equal to 30 mu m, stirring for 25-30min, adding the modified acrylic copolymer at the rotating speed of 800-1000 revolutions per minute, and stirring for 20-25min; adding natural color sand and hollow glass beads at 1000-1200 rpm, stirring for 25-30min in summer, and stirring for 40-50min in winter.
10. The preparation method of the sand-coated sand colorful stone-like coating with solar photothermal reflection heat insulation and preservation functions as claimed in claim 7, is characterized in that: when the finished paint is prepared, the stirring speed is 600-800 revolutions per minute; the dispersion impeller is used after even stirring, and the dispersion impeller is a rod type or blade type dispersion impeller.
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