CN110821065B - Exterior wall coating construction method - Google Patents
Exterior wall coating construction method Download PDFInfo
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- CN110821065B CN110821065B CN201911127322.1A CN201911127322A CN110821065B CN 110821065 B CN110821065 B CN 110821065B CN 201911127322 A CN201911127322 A CN 201911127322A CN 110821065 B CN110821065 B CN 110821065B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/02—Coverings or linings, e.g. for walls or ceilings of plastic materials hardening after applying, e.g. plaster
Abstract
The invention relates to the field of coating construction, and provides an exterior wall coating construction method aiming at the problem that a coating formed by exterior wall coating is easy to crack, the technical scheme is as follows: the method comprises the following steps: s1, base surface treatment; s2, scraping the elastic putty layer of the outer wall; s3, scraping the outer wall to fill and level the putty layer; s4, coating the water-based alkali-resistant primer layer on the outer wall; s5, painting a finish paint layer; the finishing paint comprises the following components in parts by mass: 60-70 parts of polyvinyl acetate emulsion; 30-35 parts of water; 10-15 parts of pigment; 5-8 parts of a film-forming assistant; 10-15 parts of a solvent; 1-2 parts of 3-aminon-butanol; 0.1-0.3 part of 2-chloro-3- (trifluoromethyl) pyrazine; 0.2-0.5 part of 2-chloro-4-trifluoromethylpyrimidine. Through the mutual matching of the coatings of all layers, the water resistance and the corrosion resistance of the exterior wall coating are favorably enhanced, so that the coating formed by the exterior wall coating is more difficult to crack or peel under the environment of wind, sunshine and rain.
Description
Technical Field
The invention relates to the field of coating construction, in particular to an exterior wall coating construction method.
Background
The coating is traditionally named as paint in China. The coating is a material which can be coated on the surface of a coated object and can form a firmly attached continuous film, and can play a role in protecting and beautifying a building.
The outer wall coating generally can play a certain decorative effect, but the outer wall coating is exposed in the atmosphere and is subjected to the actions of wind, sunlight, salt spray corrosion, rain, cold and heat change and the like, so that the coating is easy to crack, pulverize, peel off, discolor and the like, and the coating is easy to lose the original decorative protection function, and therefore, the development of the outer wall coating with weather resistance is very important.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an exterior wall coating construction method which has the advantage of being beneficial to improving the weather resistance of the exterior wall coating.
In order to achieve the purpose, the invention provides the following technical scheme:
an exterior wall coating construction method comprises the following steps:
s1, basal plane treatment: cleaning a base surface;
s2, scraping the elastic putty layer of the outer wall: coating the outer wall elastic putty slurry on the base surface to form an outer wall elastic putty layer;
s3, scraping the outer wall to fill and smooth the putty layer: coating exterior wall leveling putty slurry on the exterior wall elastic putty layer to form an exterior wall leveling putty layer;
s4, coating an aqueous alkali-resistant primer layer for the outer wall: coating a water-based outer wall alkali-resistant primer on the outer wall leveling putty layer to form a water-based outer wall alkali-resistant primer layer;
s5, painting a finishing paint layer: coating a finish paint on the water-based outer wall alkali-resistant primer layer to form a finish paint layer;
the finishing paint comprises the following components in parts by mass:
60-70 parts of polyvinyl acetate emulsion;
30-35 parts of water;
10-15 parts of pigment;
5-8 parts of a film-forming assistant;
10-15 parts of a solvent;
1-2 parts of 3-aminon-butanol;
0.1-0.3 part of 2-chloro-3- (trifluoromethyl) pyrazine;
0.2-0.5 part of 2-chloro-4-trifluoromethylpyrimidine.
By adopting the technical scheme, the outer wall elastic putty layer, the outer wall leveling putty layer, the water-based outer wall alkali-resistant primer layer and the finish paint layer are sequentially coated on the base surface, so that the water resistance and the corrosion resistance of the coating formed by the outer wall paint are enhanced, and the coating formed by the outer wall paint is more difficult to crack or peel under the environment of wind, sun and rain; meanwhile, the flexibility of the coating formed by the exterior wall coating is enhanced, so that the coating formed by the exterior wall coating is not easy to crack, and the service life of the coating is prolonged.
By adopting the 3-amino n-butyl alcohol, the 2-chloro-3- (trifluoromethyl) pyrazine and the 2-chloro-4-trifluoromethyl pyrimidine to cooperate with each other, the weather resistance of the finish paint is favorably enhanced, so that the finish paint layer is less prone to cracking, peeling and other phenomena under the environment of wind blowing, sun drying and rain showering, the decorative effect of the finish paint is less prone to being influenced, the service life of the finish paint is favorably prolonged, and the later maintenance cost of the finish paint is reduced.
The invention is further configured to: the coating rate of the outer wall elastic putty layer and the outer wall leveling putty layer is 2.5kg/m2The coating rate of the water-based exterior wall alkali-resistant primer layer is 0.12kg/m2The coating rate of the topcoat layer was 0.25kg/m2。
By adopting the technical scheme, the coating rate of each layer of coating on the outer wall is controlled, so that the coating thickness of each coating on the outer wall can be better controlled, the coatings on the outer wall can be better matched with each other to play a role in resisting water and corrosion, and meanwhile, the construction cost can be reduced, and the consumption of the coating is not easy to be excessive.
The invention is further configured to: the outer wall leveling putty layer and the finish paint layer are respectively coated with two layers in a transverse and vertical mode.
By adopting the technical scheme, the two outer wall leveling putty layers are respectively coated transversely and vertically, so that the base surface can be better leveled, the flatness of the outer wall body is higher, and the outer wall coating can better keep the decorative effect; meanwhile, the bonding firmness among all the layers of the exterior wall coating is facilitated, so that all the layers of the exterior wall coating are not easy to separate, and a coating formed by the exterior wall coating is not easy to crack.
The invention is further configured to: in the steps S2 and S3, when the elastic putty layer and the leveling putty layer of the outer wall are painted, the elastic putty layer and the leveling putty layer of the outer wall need to be scraped back and forth twice in batch to ensure that the elastic putty layer and the leveling putty layer of the outer wall are compact and bubble-free.
By adopting the technical scheme, the elastic putty layer of the outer wall and the filling putty layer of the outer wall are guaranteed to be compact and bubble-free by scraping back and forth twice, so that the coating formed by the outer wall coating is not easy to leave bubbles inside, the coating formed by the outer wall coating is not easy to have stress weak points, and the coating formed by the outer wall coating is not easy to crack.
The invention is further configured to: the pigment is prepared by mixing kaolin and titanium dioxide in a mass portion ratio of 1: 1.
By adopting the technical scheme, the pigment is formed by mixing the kaolin and the titanium dioxide in a mass ratio of 1:1, so that the pigment is favorably and uniformly dispersed in the finish paint, the finish paint is more uniformly colored, and the finish paint has a better decorative effect; meanwhile, the mutual cooperative matching of the kaolin and the titanium dioxide is beneficial to enhancing the weather resistance of the finish paint to a certain extent, so that the finish paint is not easy to crack under the environment of wind, sunshine and rain.
The invention is further configured to: the film-forming additive is prepared by mixing 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate and propylene glycol butyl ether in a mass ratio of 2: 3.
By adopting the technical scheme, the 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate and the propylene glycol butyl ether are mixed according to the mass part ratio of 2:3 to form the film forming auxiliary agent, so that the film forming effect of the finish paint is improved, and the decorative effect of the finish paint is better; meanwhile, the weather resistance of the finish paint is favorably enhanced, so that the finish paint is less prone to cracking and peeling under the environment of wind, sunlight and rain, the decorative effect of the finish paint is less prone to being influenced, the later maintenance cost of the finish paint is favorably reduced, and the economic benefit is improved.
The invention is further configured to: the solvent is mineral olein.
By adopting the technical scheme, the mineral olein is adopted as the solvent, so that the components in the finish paint can be better dissolved in the solvent, and the components in the finish paint can be better cooperated with each other to play a role, and the film forming effect and the weather resistance effect of the finish paint are better.
The invention is further configured to: the finish paint also comprises the following components in parts by mass:
1-2 parts of talcum powder.
By adopting the technical scheme, the talcum powder is added, so that the filling of the pores in the finish paint is facilitated, the compactness of the finish paint is higher, air holes are not easy to leave in the finish paint, the anti-cracking performance of the finish paint is further facilitated to be enhanced, and the finish paint is not easy to crack when being stressed.
The invention is further configured to: the finish paint also comprises the following components in parts by mass:
0.2-0.5 part of hexabenzocoronene.
By adopting the technical scheme, the hexabenzocoronene is added, so that the 3-amino n-butyl alcohol, the 2-chloro-3- (trifluoromethyl) pyrazine and the 2-chloro-4-trifluoromethyl pyrimidine can be better promoted to be mutually cooperated, the weather resistance of the finish paint can be better enhanced, the finish paint is less prone to cracking in the environment of wind, sunshine and rain, the decorative effect of the finish paint can be better maintained, meanwhile, the later maintenance cost of an outer wall can be reduced, and the economic benefit is improved.
The invention is further configured to: the finish paint also comprises the following components in parts by mass:
0.5-1 part of allicin.
By adopting the technical scheme, the garlicin is beneficial to inhibiting breeding and growth of bacteria and fungi, so that the mildew condition is less likely to occur on the surface of the finish paint, and the decorative effect of the finish paint is less likely to be influenced.
In conclusion, the invention has the following beneficial effects:
1. the elastic putty layer, the leveling putty layer, the water-based alkali-resistant primer layer and the finish paint layer of the outer wall are sequentially coated on the base surface, so that the water resistance and the corrosion resistance of the coating formed by the outer wall paint are enhanced, and the coating formed by the outer wall paint is less prone to cracking or peeling under the environment of wind, sun and rain;
2. the flexibility of the coating formed by the exterior wall coating is favorably enhanced through the mutual matching of the exterior wall elastic putty layer, the exterior wall leveling putty layer, the water-based exterior wall alkali-resistant primer layer and the finish paint layer, so that the coating formed by the exterior wall coating is more difficult to crack, and the service life of the coating is favorably prolonged;
3. by adopting the 3-amino n-butyl alcohol, the 2-chloro-3- (trifluoromethyl) pyrazine and the 2-chloro-4-trifluoromethyl pyrimidine to cooperate with each other, the weather resistance of the finish paint is favorably enhanced, so that the finish paint layer is less prone to cracking, peeling and the like under the environment of wind, sun and rain, the service life of the finish paint is favorably prolonged, and the later maintenance cost of the finish paint is reduced.
Drawings
FIG. 1 is a process flow diagram of the exterior wall coating construction method of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
In the following examples, the exterior wall elastic putty powder used in Qingdao Huanxiu paint Co.
In the following examples, the exterior wall leveling putty powder was the exterior wall leveling putty powder of Kunming Green decorations boat building materials Co.
In the following examples, the water-based exterior wall alkali-resistant primer of Guangdong Pasteur chemical Co., Ltd was used.
In the following examples, a polyvinyl acetate emulsion having a trade name of 730 from Jining HuaKai resin Co., Ltd is used as the polyvinyl acetate emulsion.
In the following examples, 3-aminon-butanol was 3-aminon-butanol of A53191-1g from Shanghai Ji to Biochemical technology Co., Ltd.
In the following examples, 2-chloro-3- (trifluoromethyl) pyrazine available from Hangzhou Shali medicine science and technology Co., Ltd, as its product number, CL6539, was used.
In the following examples, 2-chloro-4-trifluoromethylpyrimidine (available from Biotech, Inc., of Shanghai province) was used.
In the following examples, kaolin obtained from Cinese county Bright mineral processing Co., Ltd was used.
In the following examples, titanium dioxide from shinyless mine products processing ltd, lingshou county was used.
In the following examples, 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate was 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, Puyang hong Kogyo high-tech development Co.
In the following examples, propylene glycol butyl ether was prepared from propylene glycol butyl ether available from Jiangsu Chuangteng New Material science and technology Co., Ltd, Cat # 29387-86-8.
In the following examples, mineral oil essence from Shanghai Qibao chemical Co., Ltd was used as mineral oil essence.
In the following examples, talc powder having a particle size of 1250 mesh from Shijia Bennuo mineral Co., Ltd was used.
In the following examples, a hexabenzocoronene having a product number 12121 from Wuhan Ruilan Kangtai chemical Co.
In the following examples, allicin was produced by the method of Jinan Biqi chemical Limited under the product number BQ-20181203005.
Example 1
An exterior wall coating construction method comprises the following steps:
s1, base surface treatment, specifically comprising the following steps:
the sand paper is used for flatly grinding and polishing the impurities such as residues, spots and the like on the surface of the base surface, so that the surface of the base surface is flat, and then the dust, oil stains and ash residues on the surface of the base surface are cleaned.
S2, scraping the elastic putty layer of the outer wall, which comprises the following specific steps:
pouring clear water into a stirring kettle, adding the exterior wall elastic putty powder into the water while stirring, standing for 10min after uniformly stirring to form exterior wall elastic putty slurry, uniformly coating the prepared exterior wall elastic putty slurry on a base surface to form an exterior wall elastic putty layer, and controlling the coating rate of the exterior wall elastic putty slurry to be 3kg/m2。
S3, scraping the exterior wall to fill and level the putty layer, which comprises the following steps:
pouring clear water into a stirring kettle, adding the exterior wall leveling putty powder into the water while stirring, standing for 10min after uniformly stirring to form exterior wall leveling putty slurry, and finally uniformly coating the exterior wall leveling putty slurry obtained by preparationForming an outer wall finishing putty layer on the outer wall elastic putty layer, and controlling the coating rate of the outer wall elastic putty slurry to be 3kg/m2。
S4, brushing an aqueous alkali-resistant primer layer for the outer wall, which comprises the following specific steps:
uniformly coating the water-based outer wall alkali-resistant primer on the outer wall leveling putty layer to form a water-based outer wall alkali-resistant primer layer, and controlling the coating rate of the water-based outer wall alkali-resistant primer layer to be 0.15kg/m2。
S5, brushing a finish paint layer, which comprises the following specific steps:
adding 35kg of water into a 150L stirring kettle, stirring at the rotating speed of 800r/min, adding 12.5kg of kaolin, 2kg of 3-aminon-butyl alcohol, 0.3kg of 2-chloro-3- (trifluoromethyl) pyrazine and 0.5kg of 2-chloro-4-trifluoromethylpyrimidine while stirring, stirring for 30min, uniformly dispersing, adding 5kg of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate and 15kg of kerosene while stirring, stirring for 15min, adding 60kg of polyvinyl acetate emulsion while stirring after uniform dispersion, stirring for 30min, uniformly dispersing to form a finish paint, and finally uniformly coating the prepared finish paint on an aqueous exterior wall alkali-resistant primer layer to form a finish paint layer, and controlling the coating rate of the finish paint layer to be 0.3kg/m2Thus finishing the construction of the exterior wall coating.
Example 2
The difference from example 1 is that:
s5, brushing a finish paint layer, which comprises the following specific steps:
adding 30kg of water into a 150L stirring kettle, stirring at the rotating speed of 800r/min, adding 15kg of kaolin, 1kg of 3-aminon-butyl alcohol, 0.1kg of 2-chloro-3- (trifluoromethyl) pyrazine and 0.2kg of 2-chloro-4-trifluoromethylpyrimidine while stirring, stirring for 30min, uniformly dispersing, adding 8kg of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate and 12.5kg of kerosene while stirring, stirring for 15min, adding 65kg of polyvinyl acetate emulsion while stirring after uniform dispersion, stirring for 30min, uniformly dispersing to form finish paint, and finally uniformly coating the prepared finish paint on an aqueous exterior wall alkali-resistant primer layer to form a finish paint layer, thus completing the construction of exterior wall paint.
Example 3
The difference from example 1 is that:
s5, brushing a finish paint layer, which comprises the following specific steps:
adding 30kg of water into a 150L stirring kettle, stirring at the rotating speed of 800r/min, adding 10kg of kaolin, 1.5kg of 3-aminon-butyl alcohol, 0.2kg of 2-chloro-3- (trifluoromethyl) pyrazine and 0.35kg of 2-chloro-4-trifluoromethylpyrimidine while stirring, stirring for 30min, uniformly dispersing, adding 6.5kg of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate and 10kg of kerosene while stirring, stirring for 15min, adding 70kg of polyvinyl acetate emulsion while stirring after uniform dispersion, stirring for 30min, uniformly dispersing to form a finish paint, and finally uniformly coating the prepared finish paint on an alkali-resistant primer layer of an outer wall to form a finish paint layer, namely finishing the construction of the outer wall paint.
Example 4
The difference from example 1 is that:
s5, brushing a finish paint layer, which comprises the following specific steps:
adding 31kg of water into a 150L stirring kettle, stirring at the rotating speed of 800r/min, adding 14kg of kaolin, 1.8kg of 3-aminon-butyl alcohol, 0.1kg of 2-chloro-3- (trifluoromethyl) pyrazine and 0.5kg of 2-chloro-4-trifluoromethylpyrimidine while stirring, stirring for 30min, uniformly dispersing, adding 6kg of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate and 11kg of kerosene while stirring, stirring for 15min, adding 67kg of polyvinyl acetate emulsion while stirring after uniform dispersion, stirring for 30min, uniformly dispersing to form finish paint, and finally uniformly coating the prepared finish paint on an aqueous exterior wall alkali-resistant primer layer to form a finish paint layer, thus completing the construction of exterior wall paint.
Example 5
The difference from example 4 is that:
in step S2, the coating rate of the elastic putty layer of the outer wall is controlled to be 2.5kg/m2And when the exterior wall elastic putty slurry is uniformly coated, the exterior wall elastic putty layer is scraped twice back and forth to ensure that the exterior wall elastic putty layer is compact and bubble-free.
In step S3, the coating rate of the exterior wall leveling putty layer is controlled to be 2.5kg/m2When the exterior wall leveling putty grout is uniformly coated, firstly, the exterior wall leveling putty grout is transversely and uniformly coated to form a transverse exterior wallAnd (3) leveling the putty layer, vertically and uniformly coating the exterior wall leveling putty slurry to form a vertical exterior wall leveling putty layer after the transverse exterior wall leveling putty layer is dried and molded, and scraping the exterior wall leveling putty layer twice in a coating process to ensure that the exterior wall leveling putty layer is compact and bubble-free.
In step S4, the coating rate of the aqueous alkali-resistant primer layer for the exterior wall is controlled to be 0.12kg/m2。
In step S5, the coating rate of the top coat layer is controlled to be 0.25kg/m2And when the finish paint layer is uniformly coated, transversely and uniformly coating finish paint to form a transverse finish paint layer, and after the transverse finish paint layer is dried and formed, vertically and uniformly coating finish paint to form a vertical finish paint layer.
Example 6
The difference from example 5 is that: in step S5, the kaolin is replaced with titanium dioxide when the top coat is prepared.
Example 7
The difference from example 5 is that: in step S5, when preparing the top coat, 14kg of kaolin is replaced with a mixture of 7kg of kaolin and 7kg of titanium dioxide.
Example 8
The difference from example 5 is that: in step S5, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate is replaced with propylene glycol butyl ether in the preparation of the topcoat.
Example 9
The difference from example 5 is that: in step S5, in preparing a topcoat, 6kg of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate was replaced with 2.4kg of a mixture of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate and 3.6kg of propylene glycol butyl ether, which were uniformly mixed.
Example 10
The difference from example 5 is that: in step S5, in preparing a top coat, 14kg of kaolin was replaced with a mixture of 7kg of kaolin homogeneously mixed with 7kg of titanium dioxide, and at the same time, 6kg of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate was replaced with a mixture of 2.4kg of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate homogeneously mixed with 3.6kg of propylene glycol butyl ether.
Example 11
The difference from example 5 is that: in the step S5, when the finish paint is prepared, 1kg of talcum powder is added while kaolin, 3-aminon-butanol, 2-chloro-3- (trifluoromethyl) pyrazine and 2-chloro-4-trifluoromethyl pyrimidine are added.
Example 12
The difference from example 5 is that: in the step S5, 2kg of talcum powder is added while kaolin, 3-aminon-butanol, 2-chloro-3- (trifluoromethyl) pyrazine and 2-chloro-4-trifluoromethyl pyrimidine are added during the preparation of the finish paint.
Example 13
The difference from example 5 is that: in the step S5, when the top coat is prepared, 0.2kg of hexabenzocoronene is added while kaolin, 3-aminon-butanol, 2-chloro-3- (trifluoromethyl) pyrazine and 2-chloro-4-trifluoromethylpyrimidine are added.
Example 14
The difference from example 5 is that: in the step S5, when the top coat is prepared, 0.5kg of hexabenzocoronene is added while kaolin, 3-aminon-butanol, 2-chloro-3- (trifluoromethyl) pyrazine and 2-chloro-4-trifluoromethylpyrimidine are added.
Example 15
The difference from example 5 is that: in step S5, when preparing the finish paint, 0.5kg of allicin is added while kaolin, 3-aminon-butanol, 2-chloro-3- (trifluoromethyl) pyrazine and 2-chloro-4-trifluoromethylpyrimidine are added.
Example 16
The difference from example 5 is that: in the step S5, when the finish paint is prepared, 1kg of allicin is added while kaolin, 3-aminon-butanol, 2-chloro-3- (trifluoromethyl) pyrazine and 2-chloro-4-trifluoromethylpyrimidine are added.
Example 17
The difference from example 10 is that: in the step S5, when the finish paint is prepared, 1kg of talcum powder, 0.5kg of hexabenzocoronene and 1kg of allicin are added while adding the kaolin, the 3-amino n-butanol, the 2-chloro-3- (trifluoromethyl) pyrazine and the 2-chloro-4-trifluoromethyl pyrimidine.
Example 18
The difference from example 10 is that: in the step S5, when the finish paint is prepared, 1.5kg of talcum powder, 0.35kg of hexabenzocoronene and 0.75kg of allicin are added while kaolin, 3-amino-n-butanol, 2-chloro-3- (trifluoromethyl) pyrazine and 2-chloro-4-trifluoromethyl pyrimidine are added.
Example 19
The difference from example 10 is that: in the step S5, when the finish paint is prepared, 2kg of talcum powder, 0.2kg of hexabenzocoronene and 0.5kg of allicin are added while adding the kaolin, the 3-amino n-butanol, the 2-chloro-3- (trifluoromethyl) pyrazine and the 2-chloro-4-trifluoromethylpyrimidine.
Example 20
The difference from example 10 is that: in the step S5, when the finish paint is prepared, 1.7kg of talcum powder, 0.4kg of hexabenzocoronene and 0.6kg of allicin are added while kaolin, 3-amino-n-butanol, 2-chloro-3- (trifluoromethyl) pyrazine and 2-chloro-4-trifluoromethyl pyrimidine are added.
Comparative example 1
The difference from example 5 is that: the exterior wall coating is not coated with the exterior wall elastic putty layer in the step S2 in the construction process.
Comparative example 2
The difference from example 5 is that: the coating of the exterior wall finishing putty layer in the step S3 is not carried out in the construction process of the exterior wall coating.
Comparative example 3
The difference from example 5 is that: the exterior wall coating is not coated with the water-based exterior wall alkali-resistant primer layer in the step S4 in the construction process.
Comparative example 4
The difference from example 5 is that: in the step S5, the components of 3-amino n-butanol, 2-chloro-3- (trifluoromethyl) pyrazine and 2-chloro-4-trifluoromethyl pyrimidine are not added during the preparation of the finish paint.
Comparative example 5
The difference from example 5 is that: in step S5, the component 3-aminon-butanol is not added in the preparation of the finish paint.
Comparative example 6
The difference from example 5 is that: in step S5, the component 2-chloro-3- (trifluoromethyl) pyrazine is not added in the preparation of the finish.
Comparative example 7
The difference from example 5 is that: in step S5, the component 2-chloro-4-trifluoromethylpyrimidine is not added during the preparation of the finish.
Experiment 1
The weather resistance of the coatings formed by the exterior wall coatings constructed in the above examples and comparative examples is tested by adopting an outdoor accelerated aging test method, which comprises the following specific operation methods:
in the outer wall covered with the outer wall paint obtained by the construction of the above examples and comparative examples, samples of 5cm x 3cm x 2cm were taken, and the samples were respectively mounted on a frame rotating along with the movement of the sun, ten high-polished special aluminum mirrors of 150mm x 150mm were mounted on the frame, each mirror reflected the sun light at an angle of 90 ° and concentrated on the sample, a blast pipe was further mounted on the frame to simulate the exposure to the south at an angle of 45 °, a water spray pipe was mounted on the frame, water was sprayed onto the coating on the surface of the sample at intervals of 5h, the duration of spraying water for each time was 5min, the time (day) when the sample cracked was observed, and the area rate (%) of peeling off of the coating on the surface of the sample after half a year was recorded.
Experiment 2
In the outer wall covered with the outer wall paint obtained by the construction of the above examples and comparative examples, a sample of 5cm x 3cm x 2cm was taken, the sample was placed on an electronic tensile testing machine, both ends thereof were clamped, the testing speed was 5mm/min, and when the coating on the surface of the sample cracked, the maximum tensile load value (kN) was recorded.
The data from the above experiments are shown in Table 1.
TABLE 1
According to the comparison of the data of the embodiments 4-5 in the table 1, the coating rate of each layer of the exterior wall coating is controlled, the coating compactness of the elastic putty layer and the exterior wall leveling putty layer of the exterior wall is controlled, and meanwhile, the number of the coating layers of the exterior wall coating is controlled, so that the bonding firmness between each layer of the exterior wall coating is favorably enhanced, the layers of the exterior wall coating are more difficult to separate, and the coating formed by the exterior wall coating is more difficult to crack.
According to the comparison of the data of the examples 5 to 7 in the table 1, the influence on the weather resistance and the crack resistance of the finish paint is not obvious when the kaolin or the titanium dioxide is added as the pigment, and the pigment can be well and uniformly dispersed in the finish paint only when the kaolin and the titanium dioxide are mixed according to the mass ratio of 1:1, and meanwhile, the weather resistance and the crack resistance of the finish paint can be favorably and better enhanced, so that the finish paint is less prone to crack in the environment of wind, sun and rain.
According to the comparison of the data of example 5 and examples 8-9 in table 1, when 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate is added alone or propylene glycol butyl ether is added alone as a film forming aid, the influence on the weather resistance and the crack resistance of the finish paint is not obvious, and only when 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate and propylene glycol butyl ether are mixed with each other to be matched synergistically, the effect of improving the weather resistance and the crack resistance of the finish paint can be better achieved, so that the finish paint is less prone to crack under the environment of wind, sun and rain.
According to the comparison of the data of the embodiment 7 and the embodiments 9 to 10 in the table 1, the 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate and the propylene glycol butyl ether are mixed to form the film forming aid while the kaolin and the titanium dioxide are mixed to form the pigment, so that the pigment and the film forming aid are favorably and cooperatively matched with each other better, the weather resistance and the crack resistance of the finish paint are favorably improved, and the finish paint is less prone to cracking in the environment of wind, sun and rain.
According to comparison of data of the example 5 and the examples 11 to 16 in the table 1, the talc powder, the hexabenzocoronene or the allicin are independently added, so that the 3-aminon-butyl alcohol, the 2-chloro-3- (trifluoromethyl) pyrazine and the 2-chloro-4-trifluoromethyl pyrimidine in the finish paint are favorably promoted to be better cooperated with each other to a certain extent, the weather resistance and the crack resistance of the finish paint are favorably improved to a certain extent, and the finish paint is less prone to cracking in the environment of wind, sun and rain.
According to the comparison of the data of the example 10 and the examples 17-20 in the table 1, the talcum powder, the hexabenzocoronene and the garlicin are added to promote each other, so that the weather resistance and the crack resistance of the finish paint are improved better, and the finish paint is less prone to cracking in the environment of wind, sun and rain.
According to the comparison of the data of the example 5 and the comparative examples 1 to 3 in the table 1, the outer wall elastic putty layer, the outer wall leveling putty layer and the water-based outer wall alkali-resistant primer layer are sequentially painted on the base surface to be matched with each other, so that the weather resistance and the crack resistance of the coating formed by the outer wall coating can be better enhanced, and the weather resistance and the crack resistance of the coating formed by the outer wall coating can be easily influenced without any layer.
According to the comparison of the data of the example 5 and the comparative examples 4-7 in the table 1, only when the 3-aminon-butyl alcohol, the 2-chloro-3- (trifluoromethyl) pyrazine and the 2-chloro-4-trifluoromethyl pyrimidine are synergistically matched with each other, the effects of improving the weather resistance and the crack resistance of the finish paint can be better achieved, and the weather resistance and the crack resistance of the finish paint are easily greatly influenced without any component.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (5)
1. An exterior wall coating construction method is characterized in that: the method comprises the following steps:
s1, basal plane treatment: cleaning a base surface;
s2, scraping the elastic putty layer of the outer wall: coating the outer wall elastic putty slurry on the base surface to form an outer wall elastic putty layer;
s3, scraping the outer wall to fill and smooth the putty layer: coating exterior wall leveling putty slurry on the exterior wall elastic putty layer to form an exterior wall leveling putty layer;
s4, coating an aqueous alkali-resistant primer layer for the outer wall: coating a water-based outer wall alkali-resistant primer on the outer wall leveling putty layer to form a water-based outer wall alkali-resistant primer layer;
s5, painting a finishing paint layer: coating a finish paint on the water-based outer wall alkali-resistant primer layer to form a finish paint layer;
the finishing paint comprises the following components in parts by mass:
60-70 parts of polyvinyl acetate emulsion;
30-35 parts of water;
10-15 parts of pigment;
5-8 parts of a film-forming assistant;
10-15 parts of a solvent;
1-2 parts of 3-aminon-butanol;
0.1-0.3 part of 2-chloro-3- (trifluoromethyl) pyrazine;
0.2-0.5 part of 2-chloro-4-trifluoromethylpyrimidine;
0.2-0.5 part of hexabenzocoronene;
1-2 parts of talcum powder;
0.5-1 part of allicin;
the solvent is mineral olein;
the coating rate of the outer wall elastic putty layer and the outer wall leveling putty layer is 2.5kg/m2The coating rate of the water-based exterior wall alkali-resistant primer layer is 0.12kg/m2The coating rate of the topcoat layer was 0.25kg/m2。
2. The exterior wall paint construction method of claim 1, wherein: the outer wall leveling putty layer and the finish paint layer are respectively coated with two layers in a transverse and vertical mode.
3. The exterior wall paint construction method of claim 2, wherein: in the steps S2 and S3, when the elastic putty layer and the leveling putty layer of the outer wall are painted, the elastic putty layer and the leveling putty layer of the outer wall need to be scraped back and forth twice in batch to ensure that the elastic putty layer and the leveling putty layer of the outer wall are compact and bubble-free.
4. The exterior wall paint construction method according to any one of claims 1 to 3, characterized in that: the pigment is prepared by mixing kaolin and titanium dioxide in a mass portion ratio of 1: 1.
5. The exterior wall paint construction method according to any one of claims 1 to 3, characterized in that: the film-forming additive is prepared by mixing 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate and propylene glycol butyl ether in a mass ratio of 2: 3.
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