CN102911579A - Heat reflection-obstruction composite energy-saving coating material and preparation method thereof - Google Patents

Abstract

The invention is a composite energy-saving coating material. The composite energy-saving coating material uses a variety of microporous silicate mineral raw materials and reflective fillers after surface hydrophobic treatment, which enhances the weather resistance and waterproof performance of the coating, avoids excessive changes in thermal conductivity, and integrates reflection and heat insulation. This kind of excellent performance, which integrates two functions of reflection and barrier, has high solar reflectance, good heat insulation effect, avoids multiple multi-layer brushing operations such as heat insulation surface coating and mid-coating, and can be painted and formed at one time, and The invention has the advantages of stable performance, uniform coating film, low cost, and environmental friendliness; the preparation method has the advantages of simple process, low cost, energy saving, and is convenient for industrial popularization and application.

Description

A heat-reflecting-barrier composite energy-saving coating material and its preparation method

technical field

The invention relates to a coating technology, in particular to a heat reflection-blocking composite energy-saving coating material with high sunlight reflectivity and good heat insulation effect and a preparation method thereof.

technical background

Building energy consumption accounts for 30% to 40% of human energy consumption, and the area of newly built houses in my country is as high as 1.7-1.8 billion square meters every year, which exceeds the sum of the annual building areas of all developed countries. Most of them are used for heating and air conditioning. Improving the thermal insulation performance of buildings is an important way to save energy and improve the function of buildings. With my country's emphasis on building energy consumption, building energy conservation is imperative, so exterior wall thermal insulation coatings have emerged as the times require. The use of this coating on buildings can effectively reduce the indoor temperature, reduce the cooling demand of the building, greatly reduce the heat transfer coefficient of the external wall, thereby reducing energy consumption, the energy saving level has reached the international advanced level, and filled the domestic wall insulation material so that both old and new buildings can meet the government's energy-saving requirements.

At present, the two-layer system of reflective top coat and heat-insulating intermediate coat is mostly used on the exterior walls of buildings, and the reflective coatings are mainly solvent-based products, which are harmful to the environment and construction personnel, so their use is subject to certain restrictions , the development of new water-based reflective heat-insulating coatings is the trend of heat-insulation development, but the current water-based heat-insulated coatings due to improper formulation design, such as emulsion varieties, pigments and fillers, and improper selection of additives, etc., make the coating heat insulation effect and reflective effect and general performance improvements are limited. The barrier type heat insulation coating has poor effect on reducing convection and radiation heat transfer, and the insulation layer is thicker, has high water absorption rate, is not resistant to vibration, and has a short service life. In order to form a stable insulation system, another waterproof layer and outer protection are required. layer.

Contents of the invention

Aiming at the shortage of limited technology, the technical problem to be solved by the present invention is to design a heat reflection-barrier composite energy-saving coating material and its preparation method. The composite energy-saving coating material combines two excellent performances of reflection and heat insulation, and integrates two functions of reflection and barrier. It has the advantages of one-time brushing and molding, stable performance, uniform coating film, low cost, and environmental friendliness; the preparation method is simple in process, low in cost, energy-saving, and convenient for industrial promotion and application.

Technical scheme of the present invention is:

A composite energy-saving coating material, its composition and mass percentage include:

Component A 50~80%;

Component B 1~10%;

C component 10~40%;

The sum of each component is 100%,

The composition of described A component includes accounting for this component total amount:

Emulsion 35~65%;

Latex paint additives 5~30%;

Water 20~40%;

The emulsion is pure acrylic emulsion or silicon acrylic emulsion;

Described latex paint auxiliary agent comprises auxiliary agent 1 and auxiliary agent 2, and wherein auxiliary agent 1 is the auxiliary agent used in the beating stage, including cellulose, wetting agent, dispersant, antifreeze agent, pH regulator, defoamer and bactericidal One or more of the additives; the auxiliary agent 2 is an auxiliary agent used in the let-down stage, including one or more of defoamers, film-forming aids, thickeners and leveling agents;

The B component is an ultrafine surface hydrophobic mineral material, which is a mineral material with a surface hydrophobic treatment, and the mineral material is one or more of clay minerals, carbonates and sulfates;

The clay mineral refers to one or more of attapulgite, sepiolite, calcined kaolin, wollastonite, talcum powder, mica powder; the carbonate refers to calcium carbonate, magnesium carbonate, strontium carbonate One or more of them; said sulfate refers to barite;

The C component is a reflective filler, which is one or more of rutile titanium dioxide, zinc oxide, aluminum oxide, and artificial hollow glass microspheres, hollow ceramic microspheres or floating beads in fly ash of thermal power plants one or more of them.

The cellulose is specifically QR-15000H;

The dispersant is specifically PROXBO ₃ or Dispersant 2320;

The defoamers in the auxiliary agent 1 and auxiliary agent 2 are one or more of Foamaster NXZ, TS-4481, Foamaster A-10, and Defoamer 334;

Described antifreeze is propylene glycol; pH regulator is AMP-95; Thickener is HA-919 or Thickener HAS 632;

Described film-forming aid is specifically one or more in Texanl, propylene glycol phenyl ether, diethylene glycol butyl ether;

The wetting agent is TRITONX-100; the fungicide is Acticide HF; the leveling agent is WT-204 or RHEOLATE212;

Described auxiliary agent is preferably that auxiliary agent 1 comprises cellulose, bactericide, dispersant, defoamer, antifreeze, pH regulator and wetting agent; additives and thickeners; the proportion of each additive to the total amount of additives is: 1-5% each of cellulose, pH regulator, and fungicide in additive 1, dispersant, defoamer, and antifreeze Each accounted for 5~15%, wetting agent accounted for 4~5%; in additive 2, coalescent agent accounted for 35~50%, defoamer accounted for 4~5%, leveling agent and thickener accounted for 5~ 15%.

The preparation method of the heat reflection-barrier composite energy-saving coating material comprises the following steps:

(1) Modification of ingredients

① Dry the mineral material of component B at 120-150°C for 1-3 hours; then add a coupling agent accounting for 0.5-5% by mass of the above-mentioned mixed mineral material, mix and react for 1-3 hours, and use absolute ethanol After washing and drying, high-energy ball mill or jet mill is used for ultra-fine pulverization for 40-60 minutes, wind separation and classification, and coarse particles are returned to continue grinding to obtain nanometer ultra-fine surface hydrophobic modified mineral materials with an average particle size of 60-90nm; The coupling agent refers to at least one of a silane coupling agent and a butyl titanate coupling agent;

②Dry the reflective filler of component C described in the energy-saving coating material formula in claim 1 at 120-150°C for 1-3 hours respectively; then mix water, absolute ethanol and reflective filler according to the mass ratio Reflective filler = 10:5:1 ratio mixing, ultrasonic dispersion for 10~60min, adding a coupling agent with a mass percentage of 0.5~5% of the mixed filler, modifying in a water bath for 1~2h, washing with absolute ethanol, drying and grinding, A reflective filler with a hydrophobic surface can be obtained; the coupling agent refers to one or both of a silane coupling agent and a butyl titanate coupling agent;

(2) Preparation of composite energy-saving coating materials:

① Add water in component A and additive 1 in latex paint additives into the mixing tank, mix and stir to make a transparent jelly mixed additive solution;

② Add the nano-ultra-fine surface hydrophobic modified mineral material obtained above into the above mixing aid solution, stir and disperse at high speed for 25~30min;

③Add the reflective filler obtained from the surface hydrophobic treatment above into the mixing tank, stir, disperse, and mix;

④ Add additive 2 and emulsion in latex paint additives in component A to the above slurry, stir for 20-30 minutes, sieve and fill to get this product.

The coupling agent is one or more of silane coupling agent and titanate coupling agent.

The specific coupling agent is: silane coupling agent is ZH-1301, ZH-1304, SG-Si900, KH-560, KH-570 or KH-590; titanate coupling agent is NDZ-131, NDZ -401 or KR-41B.

The surface hydrophobic modification described in the preparation method of the present invention refers to using a coupling agent to carry out surface hydrophobic modification treatment on the B component mineral material to make it have hydrophobic properties. At the same time, the present invention also utilizes the coupling agent to carry out surface hydrophobic modification treatment on the C component, the purpose of which is to distribute the reflective filler on the surface of the coating material as much as possible and improve the reflectivity to sunlight.

Due to the poor weather resistance of conventional thermal insulation materials, especially in hot and humid environments, the thermal insulation function is reduced. In the design of energy-saving coating materials, the present invention first utilizes high-reflective materials to reflect sunlight to reduce the radiation temperature on the coating surface, and at the same time automatically radiates heat to cool down; secondly, utilizes the good heat insulation properties of hollow nano-insulation materials Heat conduction and convection reduce the speed of heat transfer from the surface of the coating to its interior; again, the heat-insulating coating is treated with water to improve the reflection effect, weather resistance and heat insulation stability of the coating under hot and humid conditions, avoiding rain Or the heat insulation performance of the coating is reduced in a humid environment, so as to achieve the purpose of improving the indoor environment and reducing energy consumption.

In the present invention, the coating prepared by surface-treating the formulation raw materials with heat insulation function has the advantages of good moldability, high smoothness, stain resistance, strong hydrophobicity, better heat insulation function and weather resistance, and the like. Reflective material, the coating film made has a higher finish and better reflection effect on heat radiation, even in cloudy days and nights, the coating can radiate heat and reduce the temperature. Test results show that the coating prepared by the present invention has very good water resistance, moisture resistance, stain resistance and weather resistance, infrared reflectance greater than 95%, visible light reflectance greater than 91.8%, and thermal conductivity of 0.048W/(m·k) .

The energy-saving coating material prepared by the present invention has the following characteristics:

1. Compared with several well-known domestic and foreign heat-insulating coatings currently on sale, the solar reflectance of the energy-saving coating material prepared by the present invention is increased by 1-3%, and the heat-insulating temperature difference of the coating is increased by 4% under the condition of the same dosage. Above ℃, the heat insulation effect is good.

2. Using a variety of microporous silicate mineral raw materials and reflective fillers after surface hydrophobic treatment enhances the weather resistance and waterproof performance of the coating and avoids excessive changes in thermal conductivity.

3. Use pure acrylic emulsion or silicone acrylic emulsion to enhance the durability and pollution resistance of the paint, and improve the appearance of the paint film. The performance is that the pollution resistance index is increased by about 20%, the number of scrubbing resistance is increased from 2,000 times specified by general exterior wall paints to more than 20,000 times, and the surface gloss of the coating is good.

4. Ultra-fine treatment of mineral additives can enhance the heat insulation effect of the coating, and the surface of the coating is fine and smooth. At the same time, adding a certain proportion of reflective fillers can effectively increase the probability of specular reflection, which can significantly reflect the sunlight. Increase to reduce the temperature of the painted surface.

5. The composite energy-saving coating material has two excellent performances of comprehensive reflection and heat insulation. It integrates two functions of reflection and barrier. The second multi-layer brushing operation can be brushed and shaped at one time.

6. This energy-saving coating material is a water-based product, which is safe and environmentally friendly, and has no harm to the environment and personnel.

On the one hand, the composite energy-saving coating material of the present invention can effectively reflect the ability of infrared rays and visible light from the sun to reduce the temperature of the coating surface; at the same time, it can also prevent the conduction of heat in the coating and reduce the transfer of heat from the coating surface to its interior. Therefore, it can significantly increase the temperature difference between the two sides of the coating, thereby avoiding a significant increase in the indoor temperature, achieving the purpose of improving the working environment and reducing energy consumption. It does not contain any chemical products harmful to health and the environment, so it is a new product that is green, environmentally friendly, healthy, safe, easy to use, economical and practical.

Description of drawings

Figure 1 is a graph showing the thermal insulation effect of Example 1 of the composite energy-saving coating material of the present invention. Among them, 1 is a composite energy-saving coating material; 2 is an American SPI heat insulation coating. The experiment is to measure the temperature difference curve of the closed space above and below the coating with time under the continuous irradiation of 100W infrared lamp for 1 hour; at the same time, it is compared with the heat insulation effect of the US SPI heat insulation coating currently on the market.

Fig. 2 is a graph showing the heat reflection effect of Example 1 of the composite energy-saving coating material of the present invention. Among them, 1 is the radiation surface temperature; 2 is the temperature difference between the upper space and the surface. The experiment is to measure the radiation surface temperature of the test coating and the temperature difference between the closed space on the coating and the radiation surface temperature under continuous irradiation of 100W infrared lamp for 1 hour.

Detailed ways

Further describe the present invention below in conjunction with embodiment and accompanying drawing thereof:

Example 1

The embodiment of the present invention provides a method for preparing a heat reflection-barrier composite energy-saving coating material, which has high solar reflectance and heat insulation effect, and its formula is shown in Table 1:

Table 1 Example 1 formula table

The specific preparation method of the composite energy-saving coating material is as follows:

1. Modification of ingredients

⑴Mix the mineral materials sepiolite, attapulgite and barite at a ratio of 2:2:1, and then dynamically dry them in a drying equipment at 125°C for 3 hours. After removing moisture, weigh them, and add 2.5% by mass Silane coupling agent ZH-1304, mix and react for 2 hours, wash repeatedly with absolute ethanol for 3 times, then dry, and use LNJ series jet milling classifier jet milling for 60 minutes to obtain nanometer ultrafine surface hydrophobic modified minerals with an average particle size of 60nm Material;

(2) Dynamically dry 200g of reflective filler rutile titanium dioxide, 60g of hollow glass microspheres, and 20g of zinc oxide in a drying equipment at 130°C for 2 hours, remove moisture, and weigh; mix water, absolute ethanol and rutile titanium dioxide according to The mass ratio is water: absolute ethanol: rutile titanium dioxide = 10:5:1 ratio mixing, ultrasonic dispersion for 40 minutes, adding 2.5% by mass percentage of silane coupling agent ZH-1304, water bath modification for 2 hours, repeated with absolute ethanol After washing 3 times, drying and grinding, the reflective filler with hydrophobic surface can be obtained; hollow glass microspheres and zinc oxide are subjected to surface hydrophobic treatment according to this method.

2. Preparation of composite energy-saving coating materials

⑴Add deionized water in component A and additive 1 into a 2L mixing tank and stir at high speed (2000r/min) to mix into a transparent jelly to make a mixed additive solution;

(2) Under high-speed stirring, add 50g of nanometer ultra-fine surface hydrophobic mineral material to the above mixing aid solution, stir and disperse for 25 minutes, pour into a grinder, and grind for 20 minutes to obtain a viscous paint slurry;

(3) Pass the paint through an 80-mesh sieve and return it to the mixing tank, add 200g of titanium dioxide and 20g of zinc oxide to the C-component reflective filler that has undergone surface hydrophobic treatment, and disperse at high speed for 20 minutes; the resulting mixed slurry is then put into the grinder Grind for 20 minutes to obtain a paint slurry, then return it to the mixing tank, and add 60 g of hollow glass beads in component C under stirring at a low speed of 200 r/min to prepare the slurry;

⑷Control the rotation speed to 200r/min and stir at a low speed, add additive 2 and pure acrylic emulsion in component A, and stir for 20 minutes until uniform;

(5) Pass the prepared latex paint through an 80-mesh sieve, measure and fill it in a packaging barrel, and seal it at room temperature.

It should be emphasized that after the high-speed dispersion in the preparation step (3), the grinder is still used to disperse. The purpose of this is that the surface energy of the ultra-fine powder particles is very high, and the fine-grained minerals are very easy to agglomerate into relatively firm large particles. Agglomerates” affect the quality of the coating. Dispersing the agglomerates of mineral particles through a grinder or colloid mill can further improve the quality of the film. In order to obtain a more uniform, fine and leveling coating.

The specific performance indicators of the resulting composite energy-saving coating material product are as follows:

Coating state: no hard lumps, uniform state after stirring; coating film appearance: white, normal appearance; construction property: two coats without obstacles; solid content ≧ 45%; drying time (surface dry) ≦ 2h; water resistance type: 96h No abnormality; alkali resistance: no abnormality within 48 hours; temperature denaturation resistance: no abnormality after 5 cycles; aging resistance (400h): pulverization level 1, discoloration level 1; visible light reflectance ≧ 90%, infrared reflectance ≧ 95%; Scrub resistance > 10,000 times; whiteness: 89; contact angle: 86°; thermal conductivity/[W/(m·k)]: 0.048.

The heat insulation effect test result of coating of the present invention is as follows:

The obtained energy-saving coating material was evenly painted on a glass carrier plate with a thickness of 2 mm in several times, and the heat insulation effect test was carried out after the coating was completely dry. The coating amount of paint is 250g/ ^m2 dry paint, and the coating specification is a square of 30.0cm×30.0cm. The test uses a 100W infrared lamp to simulate the light source and places it about 15cm directly above the test sample to test the temperature of the upper and lower spaces of the test sample located in a closed space and investigate the temperature difference in the space. The test time is 60 minutes. The time-temperature change curve of product heat insulation performance is shown in Figure 1. The results show that after 10 minutes of testing time, the temperature difference between the upper and lower closed spaces of the paint coating tends to be stable; The heat insulation effect of SPI brand heat insulation coating is better than about 5.5°C, and the coating of the present invention has better heat insulation effect.

Due to the addition of reflective fillers with high reflective properties, the composite energy-saving coating material of the present invention can highly reflect visible light and near-infrared light in the range of 400-2500nm, prevent the heat from the sun from accumulating on the surface of objects, and can automatically Carry out heat radiation cooling. Within 60 minutes of the above-mentioned heat insulation effect test, the radiation surface temperature of the coating and the temperature difference between the enclosed space on the coating and the radiation surface temperature are measured at the same time, so as to reflect the heat reflection effect of this product, and see Figure 2. After the test time of 10 minutes, the temperature difference between the closed space on the coating and the radiation surface temperature will not change, and it will remain at 22°C. The coating will not be affected by the external environment and has good thermal stability; when the test time is 20 minutes, the coating will radiate The surface temperature increases slowly, and the temperature change is controlled within 5°C, reflecting the strong heat reflection effect of the coating.

Example 2

The embodiment of the present invention provides a method for preparing a heat reflection-barrier composite energy-saving coating material, which has high solar reflectance and heat insulation effect, and its formula is shown in Table 2:

Table 2 Example 2 formula table

The specific preparation method of the composite energy-saving coating material is as follows:

1. Modification of ingredients

⑴Mix the mineral materials sepiolite, barite and mica powder according to the ratio of 2:1:1, and then dynamically dry them in a drying equipment at 130°C for 2 hours. After removing water, weigh them, and add 2.0% by mass of silane Coupling agent KH570 and 1% titanate coupling agent NDZ-131, mixed and reacted for 2 hours, washed repeatedly with absolute ethanol for 3 times, dried, and pulverized by a high-energy ball mill for 50 minutes to obtain a nanometer ultra-fine surface with an average particle size of 80nm Hydrophobically modified mineral materials;

(2) Dynamically dry 180g of reflective filler rutile titanium dioxide, 70g of hollow ceramic microspheres, and 30g of hollow glass microspheres in a drying equipment at 135°C for 2 hours, remove moisture, and weigh them; mix water, absolute ethanol and rutile titanium The white powder is mixed according to the mass ratio of water: absolute ethanol: rutile titanium dioxide = 10:5:1, ultrasonically dispersed for 30 minutes, added with 3.0% by mass of silane coupling agent KH570, modified in water bath for 1 hour, and repeated with absolute ethanol After washing for 3 times, drying and grinding, the surface-hydrophobic reflective filler can be obtained; hollow ceramic microspheres and hollow glass microspheres are subjected to surface-hydrophobic treatment according to this method.

2. Preparation of composite energy-saving coating materials

(1) Add the deionized water and additive 1 in component A into a 2L mixing tank, stir at high speed (2000r/min) and mix into a transparent jelly to make a mixed additive solution;

⑵Under high-speed stirring, add 60g of nanometer ultra-fine surface hydrophobic mineral filler to the above mixing aid solution, stir and disperse for 25 minutes, pour into a grinder, and grind for 20 minutes to obtain a viscous paint slurry;

(3) Pass the paint through an 80-mesh sieve and return it to the mixing tank, add 180g of titanium dioxide and 70g of hollow ceramic microspheres in the C-component reflective filler that has undergone surface hydrophobic treatment, and disperse at high speed for 20 minutes; the resulting mixed slurry is then put into the grinding Grind in the machine for 15 minutes to obtain a paint slurry, then return it to the mixing tank, and add 30 g of hollow glass beads in component C under stirring at a low speed of 200 r/min to prepare the slurry;

⑷Control the rotation speed to 200r/min and stir at a low speed, add additive 2 and silicone acrylic emulsion in component A, and stir for 20 minutes until uniform;

(5) Pass the prepared latex paint through an 80-mesh sieve, measure and fill it in a packaging barrel, and seal it at room temperature.

The specific performance indicators of the resulting composite energy-saving coating material product are as follows:

Coating state: no hard lumps, uniform state after stirring; coating film appearance: white, normal appearance; construction property: two coats without obstacles; solid content ≧ 45%; drying time (surface dry) ≦ 2h; water resistance type: 96h No abnormality; alkali resistance: no abnormality within 48 hours; temperature denaturation resistance: no abnormality after 5 cycles; aging resistance (400h): pulverization level 1, discoloration level 1; visible light reflectance ≧ 90%, infrared reflectance ≧ 95%; Scrub resistance > 10,000 times; whiteness: 92; contact angle: 65°; thermal conductivity/[W/(m·k)]: 0.050.

The heat insulation effect test results of the energy-saving coating material of the present invention are as follows:

The obtained coating material was evenly applied to a glass carrier plate with a thickness of 2mm in several times, and after the coating was completely dry, the heat insulation effect test was carried out. The coating amount of paint is 240g/ ^m2 dry paint, and the coating specification is a square of 30.0cm×30.0cm. The test uses a 100W infrared lamp to simulate the light source and places it about 15cm directly above the test sample to test the temperature of the upper and lower spaces of the test sample located in a closed space and investigate the temperature difference in the space. The test time is 60 minutes. The results show that after 10 minutes of test time, the temperature difference between the upper and lower closed spaces of the paint coating tends to be stable; when the test time is 20 minutes, the stable temperature difference reaches as high as 47.1°C, which is better than the heat insulation effect of the commercially available American SPI brand heat insulation paint by about 6 °C, the coating material of the present invention has better heat insulation effect.

Due to the addition of reflective fillers with high reflective properties, the composite energy-saving coating material of the present invention can highly reflect sunlight. Within 60 minutes of the above heat insulation effect test, test the radiation surface temperature of the coating and the temperature difference between the enclosed space on the coating and the radiation surface temperature to reflect the heat reflection effect of this product. After the test time of 10 minutes, the temperature difference between the closed space on the coating and the radiation surface temperature will not change, and it will remain at 24°C. The coating will not be affected by the external environment and has good thermal stability; when the test time is 20 minutes, the coating will radiate The surface temperature increases slowly, and the temperature change is controlled within 5°C, reflecting the strong heat reflection effect of the coating.

Example 3

The embodiment of the present invention provides a preparation method of a heat reflection-barrier composite energy-saving coating material, which has a high solar reflectance and heat insulation effect, and its formula is shown in Table 3:

Table 3 Example 3 formula table

The specific preparation method of the composite energy-saving coating material is as follows:

1. Modification of ingredients

⑴Mix the mineral materials sepiolite, barite and calcium carbonate at a ratio of 2:1:1, and then dynamically dry them in a drying equipment at 140°C for 1.5 hours. After removing moisture, weigh them, and add 4.0% titanium by mass Ester coupling agent NDZ-401, mix and react for 3 hours, wash repeatedly with absolute ethanol for 3 times, then dry, and use LNJ series jet mill classifier to jet mill for 60 minutes to obtain nanometer ultrafine surface hydrophobic modification with an average particle size of 70nm mineral material;

(2) Dynamically dry 210g of reflective filler rutile titanium dioxide, 50g of floating beads, and 20g of alumina in a drying equipment at 140°C for 1.5h, remove moisture, and weigh them; The ratio is water: absolute ethanol: rutile titanium dioxide = 10:5:1 ratio mixing, ultrasonic dispersion for 20 minutes, adding 4.0% by mass of titanate coupling agent KR-41B, water bath modification for 1.5 hours, using absolute ethanol After repeated washing for 3 times, drying and grinding, the reflective filler with hydrophobic surface can be obtained; floating beads and alumina are subjected to surface hydrophobic treatment according to this method.

2. Preparation of composite energy-saving coating materials

(1) Add the deionized water and additive 1 in component A into a 2L mixing tank, stir at high speed (2000r/min) and mix into a transparent jelly to make a mixed additive solution;

(2) Under high-speed stirring, add 70g of nanometer ultra-fine surface hydrophobic mineral material to the above mixing aid solution, stir and disperse for 25 minutes, pour into a grinder, and grind for 20 minutes to obtain a viscous paint slurry;

(3) Pass the paint through an 80-mesh sieve and return it to the mixing tank, add 210g of titanium dioxide and 20g of alumina to the C-component reflective filler that has undergone surface hydrophobic treatment, and disperse at a high speed for 20 minutes; then put the resulting mixed slurry into the colloid mill Grind for 20 minutes to obtain a paint slurry, then return it to the mixing tank, and add 50 g of floating beads in component C under stirring at a low speed of 200 r/min for slurry mixing;

⑷Control the rotation speed to 200r/min and stir at a low speed, add additive 2 and pure acrylic emulsion in component A, and stir for 25 minutes until uniform;

(5) Pass the prepared latex paint through an 80-mesh sieve, measure and fill it in a packaging barrel, and seal it at room temperature.

The specific performance indicators of the resulting composite energy-saving coating material product are as follows:

Coating state: no hard lumps, uniform state after stirring; coating film appearance: white, normal appearance; construction property: two coats without obstacles; solid content ≧ 45%; drying time (surface dry) ≦ 2h; water resistance type: 96h No abnormality; alkali resistance: no abnormality within 48 hours; temperature denaturation resistance: no abnormality after 5 cycles; aging resistance (400h): pulverization level 1, discoloration level 1; visible light reflectance ≧ 90%, infrared reflectance ≧ 95%; Scrub resistance > 10,000 times; whiteness: 94; contact angle: 71°; thermal conductivity/[W/(m·k)]: 0.051.

The heat insulation effect test results of the energy-saving coating material of the present invention are as follows:

The obtained coating material was evenly applied to a glass carrier plate with a thickness of 2mm in several times, and after the coating was completely dry, the heat insulation effect test was carried out. The coating amount of paint is 213g/m ² dry paint, and the coating specification is a square of 30.0cm×30.0cm. The test uses a 100W infrared lamp to simulate the light source and places it about 15cm directly above the test sample to test the temperature of the upper and lower spaces of the test sample located in a closed space and investigate the temperature difference in the space. The test time is 60 minutes. The results show that after 10 minutes of test time, the temperature difference between the upper and lower closed spaces of the paint coating tends to be stable; when the test time is 20 minutes, the temperature difference reaches a stable temperature difference as high as 46.3°C, which is about 5 times better than that of the commercially available American SPI brand heat insulation paint. °C, the coating material of the present invention has better heat insulation effect.

Due to the addition of reflective fillers with high reflective properties, the composite energy-saving coating material of the present invention can highly reflect sunlight. Within 60 minutes of the above heat insulation effect test, test the radiation surface temperature of the coating and the temperature difference between the enclosed space on the coating and the radiation surface temperature to reflect the heat reflection effect of this product. After the test time of 10 minutes, the temperature difference between the closed space on the coating and the radiating surface temperature does not change, and has been kept at 25°C. The coating will not be affected by the external environment, and the thermal stability is good; when the test time is 20 minutes, the coating radiates The surface temperature increases slowly, and the temperature change is controlled within 4°C, reflecting the strong heat reflection effect of the coating.

Example 4

The embodiment of the present invention provides a method for preparing a heat reflection-barrier composite energy-saving coating material, which has high solar reflectance and heat insulation effect, and its formula is as follows:

A component:

Water (distilled water) 225g;

Additive 2: defoamer 2 (Foamaster A-10) 3.0g;

Emulsion (silicon acrylic emulsion JRJ-3025) 410g;

Other auxiliary agents and addition are with embodiment 1;

B component:

The total amount of mineral materials added is 90g, mixed according to the ratio of attapulgite, calcined kaolin, magnesium carbonate, mica powder 2:1:1:1;

C component:

Titanium dioxide (R-595 rutile type) 150g;

Hollow glass microspheres (VS5500) 70g;

1. Preparation of composite energy-saving coating materials

The specific steps for the modification of the ingredients and the preparation of the composite energy-saving coating material are the same as in Example 1;

2. The specific performance index and heat insulation effect test results of the obtained composite energy-saving coating material product are basically the same as in Example 1, and the heat reflection effect is basically the same as in Example 2.

Example 5

The embodiment of the present invention provides a method for preparing a heat reflection-barrier composite energy-saving coating material, which has high solar reflectance and heat insulation effect, and its formula is as follows:

A component:

Water (distilled water) 202g;

Additive 1: Defoamer 1 (Foamaster NXZ) 5.0g;

Additive 2: Defoamer 20g;

Coalescence aid 1 (Texanl) 21g;

Coalescing agent 20g;

Leveling agent (WT-204) 4g;

Emulsion (2800 pure acrylic emulsion) 350g;

Other auxiliary agents and addition are with embodiment 2;

B component:

The total amount of mineral materials added is 35g, mixed according to the ratio of sepiolite, talc, and strontium carbonate in a ratio of 4:2:1;

C component:

Titanium dioxide (R-595 rutile type) 200g;

Hollow glass microspheres (VS5500) 100g;

Floating beads (200 mesh) 65g;

1. Preparation of composite energy-saving coating materials

The specific steps for the modification of the ingredients and the preparation of the composite energy-saving coating material are the same as in Example 2;

2. The specific performance index and heat insulation effect test results of the obtained composite energy-saving coating material product are basically the same as in Example 2, and the heat reflection effect is basically the same as in Example 3.

Claims (9)

1. heat reflection-obstruct composite type energy-saving coating material is characterized by that this coating material forms and mass percent comprises:

A component 50 ~ 80%;

B component 1 ~ 10%;

C component 10 ~ 40%;

Each component sum is 100%;

Wherein, the composition of described A component comprises and accounts for this component total amount:

Emulsion 35 ~ 65%;

Emulsion paint auxiliary agent 5 ~ 30%;

Water 20 ~ 40%;

Described B component is ultra-fine surface hydrophobicity mineral material, is the mineral material of processing through surface hydrophobicity, and described mineral material is one or more in clay mineral, carbonate and the vitriol;

Described C component is the reflection-type filler, is in rutile titanium white powder, zinc oxide, the aluminum oxide one or more, and in artificial hollow glass micropearl, hollow ceramic microspheres or the thermal power plant's flyash float pearl in one or more.

2. heat reflection as claimed in claim 1-obstruct composite type energy-saving coating material, it is characterized by described emulsion is pure-acrylic emulsion or organosilicon crylic acid latex.

3. heat reflection as claimed in claim 1-obstruct composite type energy-saving coating material is characterized by described clay mineral and refers in attapulgite, sepiolite, calcined kaolin, wollastonite, talcum powder, the mica powder one or more; Described carbonate refers to one or more in calcium carbonate, magnesiumcarbonate, the Strontium carbonate powder; Described vitriol refers to barite.

4. heat reflection as claimed in claim 1-obstruct composite type energy-saving coating material, it is characterized by described emulsion paint auxiliary agent and comprise auxiliary agent 1 and auxiliary agent 2, wherein auxiliary agent 1 is the making beating stage to make used additives, comprises in Mierocrystalline cellulose, wetting agent, dispersion agent, frostproofer, pH adjusting agent, defoamer and the sterilant one or more; Auxiliary agent 2 is the paint stage to make used additives, comprises in defoamer, film coalescence aid, thickening material and the flow agent one or more.

5. heat reflection as claimed in claim 1-obstruct composite type energy-saving coating material, it is characterized by described Mierocrystalline cellulose is QR-15000H;

Described dispersion agent is specially PROXBO ₃Or Dispersant 2320;

Defoamer in auxiliary agent 1 and the auxiliary agent 2 is one or more among Foamaster NXZ, TS-4481, Foamaster A-10, the Defoamer 334;

Frostproofer is propylene glycol; PH adjusting agent is AMP-95; Thickening material is HA-919 or Thickener HAS 632;

Film coalescence aid is specially one or more in Texanl, propylene glycol phenylate, the Diethylene Glycol butyl ether;

Wetting agent is TRITONX-100; Sterilant is Acticide HF; Flow agent is WT-204 or RHEOLATE 212.

6. heat reflection as claimed in claim 1-obstruct composite type energy-saving coating material is characterized by described auxiliary agent and is: auxiliary agent 1 comprises Mierocrystalline cellulose, sterilant, dispersion agent, defoamer, frostproofer, pH adjusting agent and wetting agent; Auxiliary agent 2 is film coalescence aid, flow agent, defoamer and thickening material; The add-on of every kind of auxiliary agent is that the ratio that accounts for total amount of auxiliary is: in the auxiliary agent 1 Mierocrystalline cellulose, pH adjusting agent and sterilant each 1 ~ 5%, dispersion agent, defoamer and frostproofer respectively account for 5 ~ 15%, wetting agent accounts for 4 ~ 5%; Film coalescence aid accounts for 35 ~ 50% in the auxiliary agent 2, and defoamer accounts for 4 ~ 5%, and flow agent and thickening material respectively account for 5 ~ 15%.

7. the preparation method of heat reflection as claimed in claim 1-obstruct composite type energy-saving coating material is characterized by and may further comprise the steps:

(1), the modification of batching

⑴ with the mineral material of described B component, at 120 ~ 150 ℃ of drying 1-3h; Then add the coupling agent that accounts for above-mentioned mixed mineral quality of materials percentage ratio 0.5 ~ 5%, mixing reaction 1 ~ 3h, use the absolute ethanol washing post-drying, high energy ball mill or airflow milling are carried out superfine grinding 40 ~ 60 min, the pneumatic separating classification, coarse grain returns and continues to grind, and obtaining median size is the ultra-fine surface hydrophobicity modified mineral of the nanometer material of 60 ~ 90nm; Described coupling agent refers at least a in silane coupling agent and the butyl (tetra) titanate coupling agent;

⑵ fill a prescription the reflection-type filler of described C component respectively at 120 ~ 150 ℃ of drying 1-3h with the energy-conservation coating material of claim 1; Then with water, dehydrated alcohol and reflection-type filler according to quality than water: dehydrated alcohol: reflection-type filler=10:5:1 ratio is mixed, ultra-sonic dispersion 10 ~ 60 min, the coupling agent that adds mixed fillers mass percent 0.5 ~ 5%, water-bath modification 1 ~ 2 h, behind absolute ethanol washing, oven dry is ground, and can obtain the reflection-type filler of surface hydrophobicity; Described coupling agent refers to one or both in silane coupling agent and the butyl (tetra) titanate coupling agent;

(2), the preparation of composite type energy-saving coating material:

⑴ join the auxiliary agent 1 in the water in the A component and the emulsion paint auxiliary agent in the agitation vat, and mix and blend is made transparent jelly mixed aid solution;

⑵ add the ultra-fine surface hydrophobicity modified mineral of nanometer obtained above material in above-mentioned mixed aid solution, high-speed stirring is disperseed 25 ~ 30 min;

⑶ obtain processing the reflection-type filler through surface hydrophobicity above add again and stir in agitation vat, disperse, size mixing;

⑷ add auxiliary agent 2 and the emulsion in the emulsion paint auxiliary agent in the A component in above-mentioned slurry, stir 20-30min, and the can of sieving namely gets this product.

8. the preparation method of heat reflection as claimed in claim 1-obstruct composite type energy-saving coating material is characterized by described coupling agent and is in silane coupling agent and the titanate coupling agent one or more.

9. the preparation method of heat reflection as claimed in claim 1-obstruct composite type energy-saving coating material is characterized by described coupling agent and is: silane coupling agent is ZH-1301, ZH-1304, SG-Si900, KH-560, KH-570 or KH-590; Titanate coupling agent is NDZ-131, NDZ-401 or KR-41B.

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