CN103938740B - A kind of building exterior wall heat preserving system - Google Patents

Abstract

The invention relates to the field of building thermal insulation and energy saving, and in particular to a building exterior wall thermal insulation system, which includes an external wall thermal insulation sealing base layer and an external wall thermal insulation base layer arranged in sequence on the surface of the external wall from the wall facing the direction outside the wall. The building exterior wall thermal insulation system of the present invention adopts the superposition of different thermal insulation coatings, so that the comprehensive thermal insulation effect of the wall is better, and the use of other thermal insulation materials for the wall can be reduced; it can replace the conventional exterior wall coating construction, and basically It has a very good energy-saving effect without adding any cost.

Description

A building exterior wall insulation system

technical field

The invention relates to the field of building heat preservation and energy saving, in particular to a building exterior wall heat preservation system.

Background technique

Based on the national conditions of tight resources and weak environmental carrying capacity. With the rapid development of social economy, thermal insulation and energy saving has become the focus of increasing attention of the whole society. In recent years, the environmental problems caused by global warming have been very prominent. All countries in the world have realized that if the control of energy consumption is not strengthened, it will lead to the deterioration of the human living environment in the long run, and eventually bring disaster to human society. Energy consumption accounts for about 30% of the total energy consumption of the whole society in our country, and the state has issued a series of policies for building insulation and energy saving.

The conventional wall coating structure is generally not designed for thermal insulation and energy saving, and often has a large thermal conductivity and poor thermal insulation performance.

Contents of the invention

The invention discloses a thermal insulation system for an outer wall of a building, which comprises an outer wall thermal insulation sealing base layer and an outer wall thermal insulation base layer arranged in sequence on the surface of the outer wall from the wall to the outer direction of the wall.

The building exterior wall thermal insulation system of the present invention is used for the wall body facing the outdoor direction, and the wall faces the direction outside the wall, that is, the direction from the surface of the outdoor wall body to the outdoor direction.

Preferably, the outer wall thermal insulation base layer can also be provided with a second external wall thermal insulation sealing base layer or an external wall thermal insulation finish paint layer.

Preferably, a second outer wall thermal insulation sealing base layer and an outer wall thermal insulation finish paint layer can be provided on the outer side of the outer wall thermal insulation base layer, and the second outer wall thermal insulation sealing base layer is located outside the outer wall thermal insulation base layer. The wall thermal insulation finish paint layer is located outside the second external wall thermal insulation sealing base layer.

Preferably, the thickness of the outer wall thermal insulation base layer is less than or equal to 200 microns, and the thickness of the outer wall thermal insulation base layer is 1-5 mm.

More preferably, the thickness of the second external wall thermal insulation sealing base layer is less than or equal to 200 microns; the thickness of the external wall thermal insulation finish paint layer is 0.03-3mm.

The building exterior wall insulation system of the present invention can be used in conjunction with existing coatings, and the outside of the exterior wall insulation base of the present invention is painted or coated with other decorative coatings, or tiled.

External wall insulation base

The outer wall thermal insulation base layer is obtained by coating the outer wall thermal insulation base layer paste. Described external wall thermal insulation base paste, its composition comprises the composition of following mass percentage:

Preferably, the raw material composition of the tert-acrylic emulsion includes a core raw material and a shell raw material, and the weight ratio of the core raw material to the shell raw material is 1:0.2-0.4; the composition of the core raw material includes the following The components in parts by weight: 1-3 parts of surfactant, 0.2-0.3 parts of initiator, 10-20 parts of soft monomer at the core, 5-15 parts of hard monomer at the core, 3-3 parts of organosiloxane monomer 5 parts, 0.5-1.5 parts of core functional monomer, 40-45 parts of water; the composition of the shell raw material includes the following components by weight: 0.2-0.5 parts of surfactant; 0.1-0.3 parts of initiator; Shell soft monomer 3-8 parts; shell hard monomer 5-10 parts; organosiloxane monomer 1-2 parts; shell functional monomer 0.2-1.0 parts; water 5-10 parts.

More preferably, the soft monomer of the core is selected from one or more combinations of butyl acrylate, isooctyl acrylate, ethyl tertiary carbonate, and 2-ethylhexyl acrylate; The monomer is selected from one or a combination of two or more of methyl methacrylate, styrene, methacrylic acid, and acrylic acid; the core functional monomer is selected from hydroxypropyl acrylate, hydroxyethyl acrylate, diacetone One or a combination of two or more of acrylamide; the shell soft monomer is selected from one or a combination of two or more of butyl acrylate, isooctyl acrylate, and 2-ethylhexyl acrylate; The hard monomer of the shell is selected from one or more combinations of methyl methacrylate, styrene, methacrylic acid, and acrylic acid; the functional monomer of the shell is selected from hydroxypropyl acrylate, hydroxy acrylate One or a combination of two or more of ethyl ester and diacetone acrylamide; the organosiloxane monomer is selected from vinyl triisopropoxysilane, r-methacryloxypropyl triisopropyl One or a combination of two or more of oxysilane, octavinylcyclotetrasiloxane, and octamethylcyclotetrasiloxane.

Preferably, the external wall putty heat insulation powder is selected from any one or a combination of two or more of potassium hexatitanate whiskers, hollow ceramic microspheres, hollow glass microspheres, attapulgite powder, and expanded vermiculite.

The preparation method of the exterior wall thermal insulation base paste, the steps are as follows:

1) According to the composition and ratio of the exterior wall thermal insulation base coating, mix the powder components in the raw materials evenly to obtain the mixed powder;

2) Add the mixed powder in step 1) into the water together with the remaining raw materials except water, and stir evenly to obtain the base layer paste for exterior wall insulation.

Insulation bottom layer

Both the thermal insulation bottom sealing layer of the external wall and the thermal insulation sealing bottom layer of the second external wall are obtained by coating the thermal insulation bottom sealing layer. Described thermal insulation bottom seal coating, its composition comprises each component of following parts by weight:

The raw material composition of the tertiary acrylic emulsion of the thermal insulation bottom coating can refer to the tertiary acrylic emulsion of the exterior wall thermal insulation base layer paste. The composition of the tertiary acrylic emulsion of the thermal insulation bottom coating can be completely the same as that of the tertiary acrylic emulsion of the exterior wall thermal insulation base layer paste, or it can be different through the selection of specific reagents.

Preferably, the heat insulating powder for the primer is selected from one or a mixture of two or more of 4A molecular sieve, 3A molecular sieve, mica powder and zinc oxide.

Preferably, the exterior wall pigments and fillers are selected from one or a combination of two or more of titanium dioxide, calcium carbonate, kaolin powder, and Saiboa nano rubber powder.

The preparation method of described thermal insulation bottom seal coating is as follows:

1) Stir the water in the thermal insulation bottom coating components, the dispersant in the wall additives, the wetting agent, and the hydrophilic defoamer evenly, then add all the exterior wall pigments and fillers and 1/ 2-2/3 of the total mass of primer heat insulation powder, dispersed and ground to obtain raw material slurry;

2) Add the remaining primer heat insulation powder, remaining wall additives, and tert-acrylic emulsion to the raw material slurry in step 1), stir evenly, adjust the pH of the solution to 8.0-8.5, and filter to obtain the thermal insulation bottom coating.

Insulation finish coat

The thermal insulation finish paint layer of the exterior wall is obtained by coating the thermal insulation finish paint. Described thermal insulation finish paint, its composition comprises each component of following parts by weight:

The raw material composition of the tertiary acrylic emulsion of the thermal insulation topcoat can refer to the tertiary acrylic emulsion of the exterior wall thermal insulation base layer paste. The composition of the tertiary acrylic emulsion of the thermal insulation finish paint can be completely the same as that of the tertiary acrylic emulsion of the exterior wall thermal insulation base layer paste, or it can be different through the choice of reagents in the raw materials.

Preferably, the thermal insulation powder for the top coat is selected from one or more combinations of 4A molecular sieve, 3A molecular sieve, zeolite, sepiolite, attapulgite powder, and perlite powder.

Preferably, the topcoat additive is selected from dispersants, wetting agents, defoamers, bactericides, fungicides, leveling agents, Saibo Ya nano rubber powder, pH regulators, composite film-forming agents One or a combination of two or more.

Preferably, the wall auxiliary agent is selected from dispersants, wetting agents, hydrophilic defoamers, hydrophobic defoamers, bactericides, antifungal agents, leveling agents, film-forming agents, pH regulators, One or a combination of two or more of antifreeze and flame retardant.

More preferably, the flame retardant is an alcohol solution of chlorobridge anhydride. In the alcohol solution of chloracid anhydride, the mass ratio of chloracid anhydride to ethanol is 1:1.

Preferably, the water is pure water.

Preferably, the raw material of the tert-acrylic emulsion also includes a bactericide.

More preferably, the weight ratio of the amount of the fungicide to the total mass of the core raw material and the shell raw material is 0.5-2:100. Optimally, the weight ratio of the amount of the fungicide to the total mass of the core raw material and the shell raw material is 1:100.

The function of the fungicide is to prevent the deterioration of the long-term tertiary acrylic emulsion.

Among the present invention, the preparation method of described tert-acrylic emulsion is as follows:

1) Add 1/2 to 3/4 mass of water, 1/10 to 1/2 mass of surfactant, 1/5 to 1/2 mass of initiator, 1/5 to 1/2 mass of the core raw material 1/15-2/5 mass core hard monomer, 1/4-2/3 mass core functional monomer and 1/10-1/3 mass organosiloxane Add the alkane monomer into the reaction kettle, raise the temperature to 80-87°C under stirring conditions, and react for 10-15 minutes to obtain seed crystals; mix the remaining core raw materials evenly to obtain the core pre-emulsion; add the core pre-emulsion dropwise to In the seed crystal of the reaction kettle, after the dropwise addition, the reactant in the reaction kettle is heated to 83-90°C, and the temperature is kept for 2-3 hours to obtain the core layer emulsion particles;

2) Mix all the shell raw materials evenly to obtain the shell pre-emulsion; add the shell pre-emulsion dropwise to the core layer emulsion particles obtained in step 1), and raise the temperature of the reactants in the reactor to 83 ~90°C, keep warm for 2~3h, cool down to below 40°C after the reaction, adjust the pH of the solution to 7~8, and filter to obtain the tert-acrylic emulsion product.

Preferably, when the raw material of the tertiary acrylic emulsion also includes a bactericide, step 2) is: mix all the shell raw materials evenly to obtain the shell pre-emulsion; add the shell pre-emulsion dropwise to step 1) In the obtained core layer emulsion particles, after the dropwise addition, the reactants in the reactor were heated up to 83-90°C, kept for 2-3 hours, cooled to below 40°C, and the pH of the solution was adjusted to 7-8, adding a bactericide, and filtering , to get the product.

Preferably, step 2) heat-preserve and react for 2-3 hours, and cool to 20-40° C. after the reaction is completed.

Preferably, the particle size of the raw material slurry in step 3) is 18-22 μm.

Preferably, when the core part pre-emulsion is added dropwise in the step 1), the temperature of the seed crystal is 80-87°C. The dropping rate is 1-2ml/min; preferably 1.1-1.3ml/min.

Preferably, when the shell pre-emulsion is added dropwise in the step 2), the temperature of the core emulsion particles is 80-87°C. The dropping rate is 1.1-1.3ml/min; preferably 1.1-1.3ml/min.

Preferably, the solution used to adjust the pH value is NaOH solution. Preferably, the concentration of NaOH is 15-20%.

The second aspect of the present invention discloses the preparation method of the aforementioned building exterior wall thermal insulation system. First, the thermal insulation bottom seal coating is applied on the surface of the external wall once to obtain the thermal insulation bottom layer of the external wall, and then the external wall thermal insulation base layer is used on the outside of the external wall thermal insulation bottom layer. The paste is applied 1 to 2 times to obtain the outer wall insulation base.

More preferably, it is also necessary to coat the outer wall thermal insulation sealant primer once with the thermal insulation primer coat to obtain the second outer wall thermal insulation sealant primer; or to coat the outer wall thermal insulation sealant primer 1-2 times, Get the exterior wall insulation topcoat.

More optimally, it is also necessary to apply thermal insulation primer once on the outer side of the thermal insulation sealant of the external wall to obtain a second thermal insulation sealant of the external wall, and finally to coat the thermal insulation topcoat for 1- 2 times to get the exterior wall insulation topcoat.

The preparation of the building exterior wall thermal insulation system of the present invention can be used in conjunction with existing coatings.

The third aspect of the present invention discloses the application of the aforementioned building exterior wall thermal insulation system in the field of building thermal insulation.

The beneficial effects of the present invention are as follows: 1. Each individual layer of coating has a good thermal insulation effect, and the superposition of different thermal insulation coatings makes the comprehensive thermal insulation effect of the wall better, and can reduce the use of other thermal insulation materials for the wall more . 2. Since the emulsions used in each product in the insulation system are basically similar, the compatibility between each coating is very good. This can reduce many painting accidents caused by improper collocation between coats. 3. Using a comprehensive thermal insulation system instead of conventional interior and exterior wall coating construction has a good energy-saving effect without increasing any cost.

Description of drawings

Figure 1: Structural diagram of building exterior wall insulation system

Figure 2: Structural diagram of building exterior wall insulation system

w. Wall 1. The bottom layer of external wall insulation seal 2. The base layer of external wall insulation 3. The second bottom layer of external wall insulation seal

detailed description

Before further describing the specific embodiments of the present invention, it should be understood that the protection scope of the present invention is not limited to the following specific specific embodiments; it should also be understood that the terms used in the examples of the present invention are to describe specific specific embodiments, It is not intended to limit the protection scope of the present invention.

Preparation of embodiment 1 exterior wall thermal insulation base paste

1. Preparation of tert-acrylic emulsion

Method 1: 1) Composition of raw materials in the nuclear department

2) Composition of shell raw materials

3/4 of the deionized water in the core raw material components of the above reactant formula, 2/5 of the surfactant, 1/3 of the initiator, 1/4 of the soft monomer of the core, 1/6 of the hard monomer of the core, Add 1/4 of the core functional monomer and 1/6 of the organosiloxane monomer to the reaction kettle, heat up to 80-87°C under stirring conditions, and react after 10-15 minutes of stable reaction to form a seed nanocrystal emulsion, then drop Add the core pre-emulsion composed of the remaining part of the core material, the weight ratio of the core material to the shell material is 1:0.2; react at 83-90°C for 2-3 hours to form core layer emulsion particles. Then continue to drop the shell pre-emulsion prepared after mixing the shell raw materials, react at 83-90°C for 2-3 hours, initiate graft copolymerization, cool to 20-40°C, adjust the pH value to 8, and obtain tertiary Acrylic emulsion.

Method 2: 1) Raw material composition of raw materials in the nuclear department

2) Raw material composition of shell raw materials

In the raw material components of the above core part, 1/2 mass of deionized water, 1/2 mass of surfactant, 1/5 mass of initiator, 1/5 mass of core soft monomer, 2/5 mass The core hard monomer, 1/4 mass core functional monomer, and 1/10 mass organosiloxane monomer are added to the reaction kettle, and the temperature is raised to 80°C under stirring conditions to react, and after a stable reaction for 10-15min , forming a seed nanocrystal emulsion and then mixing the remaining raw materials in the core material composition evenly to obtain a core layer pre-emulsion; reacting at 83° C. for 2 hours to form core layer emulsion particles. Then continue to drop the shell pre-emulsion prepared after the shell raw materials are mixed, the weight ratio of the core raw material and the shell raw material is 1:0.4, react at 83°C for 2 hours, initiate graft copolymerization, cool to 40°C, Adjust the pH to 7 to obtain a tert-acrylic emulsion.

Method 3: 1) Raw material composition of raw materials in the nuclear department

2) Raw material composition of shell raw materials

In the raw material components of the above core part, 3/4 mass of deionized water, 1/10 mass of surfactant, 1/2 mass of initiator, 1/2 mass of core soft monomer, 1/15 mass The core hard monomer, 2/3 mass core functional monomer, and 1/3 mass organosiloxane monomer were added to the reaction kettle, and the temperature was raised to 87°C under stirring conditions for reaction. After a stable reaction for 15 minutes, the formation Seed nanocrystal emulsion, and then add dropwise the core pre-emulsion composed of the remaining part of the core raw material; react at 90° C. for 2 hours to form core layer emulsion particles. Then continue to drop the shell pre-emulsion prepared after the shell raw materials are mixed, the weight ratio of the core raw material and the shell raw material is 1:0.3, react at 90°C for 3 hours, initiate graft copolymerization, cool to 20°C, Adjust the pH value to 8, add a fungicide, the weight ratio of the amount of the fungicide to the total mass of the core raw material and the shell raw material is 2:100, and the tert-acrylic emulsion is obtained.

2. Preparation of exterior wall insulation base paste

Raw materials: polyvinyl alcohol 2488, purchased from Shanghai Lite Chemical Technology Co., Ltd.; polyvinyl alcohol 1799, purchased from Huazhi Chemical Technology Co., Ltd.; dispersant S-70S, defoamer DF538, purchased from Shanghai Zhongcheng Chemical Co., Ltd.; dispersant 2320 was purchased from Shenzhen Haichuan Co., Ltd.

1) Method 1:

The composition of exterior wall insulation base paste:

According to the formula quantity of this example, mix hexatitanic acid whiskers, polyvinyl alcohol 2488, hollow ceramic microspheres, hydroxypropyl methylcellulose, and expanded vermiculite; take pure water in a container, and press Add tert-acrylic emulsion, dispersant 2320, propylene glycol (antifreeze), antifungal agent 515, defoamer DF538, chlorobridge anhydride ethanol solution (chlorobridge anhydride: ethanol = 1:1 (mass ratio)), dodecyl Ester alcohol (film-forming agent), after stirring evenly, add these mixed liquids to the mixed powder that has been blended evenly, stir for 10 minutes, and pack it into the warehouse after testing.

2) Method 2:

The composition of exterior wall insulation base paste:

According to the formula quantity of this embodiment, the hollow ceramic microspheres, expanded vermiculite, polyvinyl alcohol 2488, and hydroxypropyl methylcellulose were mixed evenly. Take purified water in the container, add styrene-acrylic emulsion BLJ-8866, dispersant 2320, propylene glycol (antifreeze), anti-fungal agent 515, defoamer DF538, and ethanol solution of chloracid anhydride in order while stirring (chloracid anhydride: Ethanol=1:1 (mass ratio)), lauryl ester alcohol (film-forming agent), after stirring evenly, add these mixed liquids to the mixed powder that has been blended evenly, stir for 10min, and pack it into the warehouse after testing.

3) Method 3:

The composition of exterior wall insulation base paste:

According to the formula amount of this example, the attapulgite powder, polyvinyl alcohol 2488, and hydroxypropyl methylcellulose were physically blended uniformly. Take purified water in a container, add tert-acrylic emulsion, dispersant 2320, propylene glycol (antifreeze), antifungal agent 515, defoamer DF538, chlorobridge acid anhydride ethanol solution, dodecyl alcohol (synthetic film), after stirring evenly, add these mixed liquids to the mixed powder that has been blended uniformly, stir for 10 minutes, and pack them into the warehouse after testing.

4) Method four:

Physically blend the sepiolite, expanded vermiculite, hollow ceramic microbeads and attapulgite powder according to the formula quantity. Take purified water in a container, add dispersant 2320, tert-acrylic emulsion, propylene glycol (antifreeze), antifungal agent 515, defoamer DF538, ethanol solution of chlorobridge acid anhydride in order while stirring, and mix these The liquid is added to the mixed powder that has been blended uniformly, stirred for 30 minutes, and packaged for storage after testing.

5) Method five:

The composition of exterior wall insulation base paste:

According to the formula amount of this embodiment, the sepiolite, hollow glass microspheres, and hollow ceramic microspheres were physically blended uniformly. Take purified water in a container, add dispersant 2320, tert-acrylic emulsion, propylene glycol (antifreeze), antifungal agent 515, defoamer DF538, ethanol solution of chlorobridge acid anhydride in order while stirring, and mix these The liquid is added to the mixed powder that has been blended uniformly, stirred for 50 minutes, inspected for workability, and packaged for storage.

3. Thermal conductivity test of base paste for exterior wall insulation

1) Experimental object: the base layer paste for exterior wall insulation prepared in this example; comparative example: ordinary exterior wall putty paste purchased in the market.

2) Experimental method: GB/T10297-2008 "The heat flow meter method for the determination of the steady-state thermal resistance and related characteristics of thermal insulation materials"

3) Experimental results

Table 1 Thermal conductivity of exterior wall insulation base paste

The preparation of embodiment 2 thermal insulation bottom coating

Dispersant S-70S was provided by Shanghai Zhongcheng Chemical Co., Ltd., and dispersant 2320 was provided by Shenzhen Haichuan Co., Ltd. Wetting agent LB407 and wetting agent EFS4070 were provided by Shanghai Zhongcheng Chemical Co., Ltd. The hydrophilic defoamer 315 was provided by Shenzhen Haichuan Co., Ltd., and the hydrophobic defoamer DF538 was provided by Shanghai Zhongcheng Chemical Co., Ltd. Titanium dioxide 996 was provided by Shanghai Yantai Co., Ltd. 4A molecular sieve was provided by Luoyang Jianlong Co., Ltd. Saiboya nano rubber powder is provided by Yuhang Jiacheng Nonmetal Mining Co., Ltd. Leveling agent LEV-202, provided by Shanghai Zhongcheng Chemical Co., Ltd. Fungicide 515 was provided by Shanghai Chaoling Co., Ltd. Antifungal agent A2W, provided by Shanghai Chaoling Co., Ltd. Wetting agent EFS-407 was provided by Shanghai Zhongcheng Chemical Co., Ltd. Surfactant A6820 (sulfosuccinic acid alkyl alcohol ether ester sodium salt), surfactant V20S (polyether sulfate containing allyl alkoxy group), surfactant PS925 (branched alcohol ether) were purchased from Shanghai Zhongxin Provided by Fine Chemical Co., Ltd. Tert-acrylic emulsion, prepared in Example 1.

Method 1: (unit: g)

Take deionized water, add dispersant, wetting agent, hydrophilic defoamer 315 and stir evenly, add all pigments and fillers and 1/2 mass of heat insulation powder under stirring conditions, disperse at high speed for 30 minutes, grind on a grinder, and take samples detection. When the product particle fineness reaches about 20μm, stop grinding. Add the remaining heat insulation powder, tertiary acrylic emulsion, antifungal agent, bactericide, film-forming agent, hydrophobic defoamer 538, and leveling agent, stir evenly, adjust the pH to 8.0, filter, and pack to obtain the thermal insulation back cover coating .

Method 2: Formula: (unit: g)

Take deionized water, add dispersant, wetting agent, defoamer 315 and stir evenly, add all pigments and fillers and 2/3 mass of heat insulation powder under stirring conditions, disperse at high speed for 45 minutes, grind on a grinder, and take samples for testing. When the product particle fineness reaches about 18μm, stop grinding. Add the remaining heat insulation powder, tertiary acrylic emulsion, antifungal agent, bactericide, film-forming aid, defoamer 538, thickening and leveling agent, stir evenly, filter, adjust the ph to 8.5, pack, and obtain the thermal insulation back cover coating .

Method 3: Formula: (unit: g)

Take deionized water, add dispersant, wetting agent, defoamer 315 and stir evenly, add all pigments and fillers and 1/2 mass heat insulation powder under stirring condition, disperse at high speed for 40min, put it into the grinder for grinding, and take samples for testing. When the product particle fineness reaches about 22μm, stop grinding. Add the remaining heat insulation powder, add tert-acrylic emulsion, antifungal agent, fungicide, film-forming agent, defoamer 538, thickening and leveling agent, stir evenly, filter, adjust the ph to 8.0, and pack to obtain the thermal insulation back cover coating . Method 4: Formula: (unit: g)

Take deionized water, add dispersant, wetting agent, defoamer 315 and stir evenly, add all pigments and fillers and 1/2 quality heat insulation powder under stirring conditions, disperse at high speed for 30min-45min, grind on the grinder, and take samples for testing . When the product particle fineness reaches about 20μm, stop grinding. Add the remaining heat insulation powder, add tert-acrylic emulsion, antifungal agent, fungicide, film-forming agent, defoamer 538, thickening and leveling agent, stir evenly, adjust the pH to 8.5, filter, and pack to obtain the insulation back cover coating.

3. Performance test of thermal insulation back cover coating

Taking the thermal insulation back cover paint prepared by methods 1 to 4 of this example as the test object, the performance test method refers to the national standard GB/T9756-2009 "Synthetic Resin Emulsion Interior Wall Paint", and GB18582-2008 "Interior Decoration Materials Interior Wall Paint Limits of Hazardous Substances" JG/T210-2007 "Primers for Interior and Exterior Walls of Buildings", the test results are shown in Table 2.

Table 2 performance test of thermal insulation back coating

The preparation of embodiment 3 insulation finish paint

1) Formula

Dispersant S-70S is provided by Shanghai Zhongcheng Chemical Co., Ltd.; dispersant 2320 is provided by Shenzhen Haichuan Co., Ltd.; wetting agent LB407 and wetting agent EFS4070 are provided by Shanghai Zhongcheng Chemical Co., Ltd.; hydrophilic defoamer is The defoamer 315 was provided by Shenzhen Haichuan Co., Ltd.; the hydrophobic defoamer was defoamer DF538, provided by Shanghai Zhongcheng Chemical Co., Ltd. 4A molecular sieve was provided by Luoyang Jianlong Co., Ltd. Saiboya nano rubber powder is provided by Yuhang Jiacheng Nonmetal Mining Co., Ltd. Leveling agent LEV-202, provided by Shanghai Zhongcheng Chemical Co., Ltd. The pH regulator AP-95 was provided by Shanghai Zhongcheng Chemical Co., Ltd. Fungicide 515 was provided by Shanghai Chaoling Co., Ltd. Antifungal agent A2W, provided by Shanghai Chaoling Co., Ltd. Wetting agent: EFS-4070 is provided by Shanghai Zhongcheng Chemical Co., Ltd. Tertiary acrylic emulsion, embodiment 1 method one to three.

Recipe one:

Recipe 2:

Recipe three:

Formula 4: (unit: g)

2) Process

Take deionized water, add dispersant, wetting agent, defoamer 315 and stir evenly, add 2/3 of the mass of heat insulation powder under stirring condition, disperse at high speed for 45min, grind on the grinder, and take samples for testing. When the product particle fineness reaches about 20μm, stop grinding. Add tert-acrylic emulsion, antifungal agent, bactericide, AP-95 regulator, film-forming aid, defoamer 538, thickening and leveling agent, stir evenly, filter, pack, and obtain the thermal insulation topcoat.

3. Performance testing of thermal insulation topcoat

Detect the performance of the thermal insulation topcoat obtained by methods 1 to 4 of this embodiment. The detection method refers to the following standards: GB/T9756-2009 "Synthetic Resin Emulsion Interior Wall Coating", GB18582-2008 "Indoor Decoration Materials and Interior Wall Coatings" Limit of Hazardous Substances", JC/T1074-2008 "Purification Performance of Coating Materials for Indoor Air Purification Functional Coatings" Class I, HG/T4109-2009 "Negative Ion Functional Coatings", GB/T1741-2007 "Determination of Mold Resistance of Paint Films" , and the test results are shown in Table 3.

Table 3 Performance test results of thermal insulation topcoat

4. Thermal conductivity test of thermal insulation topcoat

1) Experimental object: the thermal insulation topcoat prepared by method 1-4 of this example.

2) Experimental method: GB/T10297-2008 "The heat flow meter method for the determination of the steady-state thermal resistance and related characteristics of thermal insulation materials"

3) Experimental results

Table 4 Test results of thermal conductivity of thermal insulation finish paint

method 1 Method 2 Method 3 Method 4

0.08W/m·k 0.10W/m·k 0.09W/m·k 0.08W/m·k

Embodiment 4 The thermal insulation effect test of the external wall thermal insulation system

1. Preparation of building exterior wall insulation system

In order to first coat the surface of the external wall with thermal insulation bottom coating once to obtain the bottom layer of thermal insulation of the external wall with a thickness of 200 microns, and then coat the outer side of the bottom layer of thermal insulation of the external wall with the paste of the primary layer of thermal insulation of the external wall for 1 to 2 times to obtain the thermal insulation layer of the external wall. The base layer, with a thickness of 4mm, can obtain the building exterior wall insulation system.

2. Thermal insulation effect test

1) Test object: external wall insulation system; comparison object: ordinary wall coating construction

2) Test method:

A. Take a square tin can, apply exterior wall insulation system coating (external wall insulation seal base, exterior wall insulation base layer, exterior wall insulation top coat) on the outside of a certain surface of the square tin can, and finally coat ordinary exterior walls 2 coats of waterproof topcoat. The outside of the other side of the square tin can corresponds to the common exterior wall paint purchased in the construction market, and the concrete construction steps and methods are shown in Table 5.

B. After the curing is completed, add water into the square tin tank and keep the temperature at 50°C.

C. Use an infrared temperature test gun to test the external surface temperature T1 of the external wall insulation system and test the external surface temperature T2 of the ordinary wall coating system. By comparing T1 and T2, the experimental results are shown in Table 6;

D. The test environment is a closed environment with a temperature of 20±2°C and a humidity of 30% to 70%.

Table 5 Construction steps of exterior walls

Table 6 Experimental results (50°C)

Claims (8)

1. A building exterior wall insulation system, which comprises an exterior wall surface, an exterior wall insulation sealing base layer and an exterior wall insulation base layer arranged in sequence from the wall facing the direction outside the wall; Wherein, the thermal insulation bottom seal layer of the exterior wall is obtained by coating the thermal insulation bottom seal coating, and the thermal insulation bottom seal coating comprises the following components in parts by weight: Wherein, the outer wall thermal insulation base layer is obtained by coating the outer wall thermal insulation base layer paste, and the composition of the outer wall thermal insulation base layer paste includes the following components by mass percentage: The raw material composition of the tertiary acrylic emulsion includes a core raw material and a shell raw material, and the weight ratio of the core raw material and the shell raw material is 1:0.2 to 0.4; the composition of the core raw material includes the following parts by weight: Components: 1-3 parts of surfactant, 0.2-0.3 parts of initiator, 10-20 parts of core soft monomer, 5-15 parts of core hard monomer, 3-5 parts of organosiloxane monomer, core 0.5-1.5 parts of functional monomers, 40-45 parts of water; the composition of the shell raw materials includes the following components by weight: 0.2-0.5 parts of surfactants; 0.1-0.3 parts of initiators; Body 3-8 parts; shell hard monomer 5-10 parts; organosiloxane monomer 1-2 parts; shell functional monomer 0.2-1.0 parts; water 5-10 parts; the core soft monomer One or a combination of two or more selected from butyl acrylate, isooctyl acrylate, ethyl tert-carbonate, and 2-ethylhexyl acrylate; the core hard monomer is selected from methyl methacrylate, benzene One or a combination of two or more of ethylene, methacrylic acid, and acrylic acid; the core functional monomer is selected from one or more of hydroxypropyl acrylate, hydroxyethyl acrylate, and diacetone acrylamide combination; the shell soft monomer is selected from one or more combinations of butyl acrylate, isooctyl acrylate, and 2-ethylhexyl acrylate; the shell hard monomer is selected from methyl One or a combination of two or more of methyl acrylate, styrene, methacrylic acid, and acrylic acid; the shell functional monomer is selected from one of hydroxypropyl acrylate, hydroxyethyl acrylate, and diacetone acrylamide or a combination of two or more; the organosiloxane monomer is selected from vinyl triisopropoxysilane, r-methacryloxypropyl triisopropoxysilane, octavinyl cyclotetrasiloxane Alkane, octamethylcyclotetrasiloxane or a combination of two or more. 2. The building exterior wall thermal insulation system according to claim 1, characterized in that, a second exterior wall thermal insulation sealing base layer or an external wall thermal insulation finish paint layer can also be provided on the outer side of the external wall thermal insulation base layer. 3. The building exterior wall insulation system as claimed in claim 1, wherein a second exterior wall insulation sealing base layer and an exterior wall insulation topcoat layer can also be provided on the outside of the exterior wall insulation base layer, and the second The thermal insulation seal base layer of the external wall is located outside the thermal insulation base layer of the external wall, and the thermal insulation finish paint layer of the external wall is located outside the second thermal insulation seal base layer of the external wall. 4. The building exterior wall thermal insulation system according to any one of claims 2 or 3, wherein the second exterior wall thermal insulation bottom layer is obtained by coating the thermal insulation bottom coating; the exterior wall thermal insulation topcoat Obtained by coating the thermal insulation topcoat, the composition of the thermal insulation topcoat includes the following components in parts by weight: 5 . The building exterior wall insulation system according to claim 1 , wherein the thickness of the exterior wall insulation sealing base layer is less than or equal to 200 microns, and the thickness of the exterior wall insulation base layer is 1-5 mm. 6 . 6. The building exterior wall thermal insulation system as claimed in claim 1, wherein the primer thermal insulation powder is selected from one or more mixtures of 4A molecular sieve, 3A molecular sieve, mica powder and zinc oxide; The external wall putty heat insulation powder is selected from any one or a combination of two or more of potassium hexatitanate whiskers, hollow ceramic microspheres, hollow glass microspheres, attapulgite powder, and expanded vermiculite. 7. The preparation method of the building exterior wall thermal insulation system according to any one of claims 1, 5-6, is to firstly apply the thermal insulation bottom seal paint on the surface of the external wall once to obtain the bottom layer of the external wall thermal insulation seal, and then apply the thermal insulation seal to the external wall. The outer side of the bottom layer is coated with the base layer paste for external wall insulation for 1 to 2 times to obtain the base layer for external wall insulation. 8. The application of the building exterior wall thermal insulation system according to any one of claims 1-6 in the field of building thermal insulation.