CN113462224A - Putty powder and preparation method and application thereof - Google Patents
Putty powder and preparation method and application thereof Download PDFInfo
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- CN113462224A CN113462224A CN202110963365.4A CN202110963365A CN113462224A CN 113462224 A CN113462224 A CN 113462224A CN 202110963365 A CN202110963365 A CN 202110963365A CN 113462224 A CN113462224 A CN 113462224A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/34—Filling pastes
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Abstract
The invention provides putty powder and a preparation method and application thereof, and the putty powder comprises the following components in parts by weight: 15-35 parts of Portland cement, 10-30 parts of heavy calcium carbonate, 3-10 parts of talcum powder, 0.5-1.5 parts of redispersible latex powder, 0.7-2 parts of mildew preventive, 0.2-0.5 part of wood fiber and 0.2-0.5 part of amylase. According to the putty powder disclosed by the invention, by adding amylase and redispersible latex powder, the putty powder has excellent leveling property and bonding property; in addition, the putty powder has a good mildew-proof function by doping the mildew preventive into the putty powder.
Description
Technical Field
The invention relates to the technical field of filling slurry, in particular to putty powder, and also relates to a preparation method and application of the putty powder.
Background
The putty powder is a kind of building decoration material, is a base material for repairing and leveling wall surface, and the surface of the newly purchased blank room needs to be coated with a layer of white putty, so as to lay a good foundation for the next step of decoration (painting and wallpaper pasting).
The putty is divided into inner wall putty and outer wall putty, and the outer wall putty has large adhesiveness, high strength and slightly low environmental protection index because the outer wall putty is resistant to wind, wind and sunlight. The interior wall putty has better comprehensive index, is healthy and environment-friendly, so the interior wall is not externally used, and the exterior wall is not internally used.
The main components of the putty are talcum powder and glue, the whiteness of the putty is generally above 90, and the fineness of the putty is above 330. The conventional putty is gypsum or cement based, so that the surface roughness is easier to bond firmly. However, during construction, a layer of interface agent is coated on the base layer to seal the base layer and improve the adhesion of the wall surface, so that the putty can be better bonded on the base surface.
In practical application, indoor humidity or building material water absorption provides favorable conditions for growth of the mold, so that the mold can be parasitic on the surface of a wall by utilizing nutrients such as available carbon sources and nitrogen sources in the wall under proper temperature and humidity, the appearance of the wall is influenced, and the wall is mildewed, pulverized and dropped.
Disclosure of Invention
In view of the above, the present invention is directed to a putty powder for improving the aesthetic property of a wall decoration layer.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the putty powder comprises the following components in parts by weight: 15-35 parts of Portland cement, 10-30 parts of heavy calcium carbonate, 3-10 parts of talcum powder, 0.5-1.5 parts of redispersible latex powder, 0.7-2 parts of mildew preventive, 0.2-0.5 part of wood fiber and 0.2-0.5 part of amylase.
Further, the mildew preventive comprises at least one of nano titanium dioxide, calcium propionate and sodium benzoate.
Furthermore, the components of the mildew preventive comprise 0.5 to 1 part of nano titanium dioxide, 0.1 to 0.5 part of calcium propionate and 0.1 to 0.5 part of sodium benzoate by weight.
Further, the redispersible latex powder comprises a vinyl acetate-ethylene copolymer.
The putty powder disclosed by the invention has the advantages that the amylase has the anti-dropping performance, so that the putty powder is good in scraping performance, the redispersible latex can increase the binding force of the putty and a decorative surface and increase the smoothness of the putty powder, and therefore, the amylase and the redispersible latex powder are added into the putty powder, so that the putty powder has excellent leveling property and bonding performance.
In addition, the nanometer titanium dioxide in the putty powder has high thermal stability and chemical stability, strong hydrophilicity and strong bactericidal property, and the antibacterial property of the wall body is greatly enhanced by adding the calcium propionate and the sodium benzoate, so that the putty powder has good mildew-proof function after being doped with the nanometer titanium dioxide, the calcium propionate and the sodium benzoate.
In conclusion, the putty powder can effectively improve the aesthetic property of a decorative layer on the surface of a wall body.
Meanwhile, the invention also relates to a preparation method of the putty powder, which comprises the following steps:
s1, sieving the mildew preventive;
s2, sieving the Portland cement, the ground calcium carbonate, the talcum powder, the redispersible polymer powder, the wood fiber and the amylase, and mixing the sieved materials with the mildew preventive to obtain the putty powder.
Further, the mildew preventive comprises at least one of nano titanium dioxide, calcium propionate and sodium benzoate.
Further, in step S1, the nano titanium dioxide, the calcium propionate, and the sodium benzoate are respectively sieved and mixed uniformly, and the mesh number of the sieved mesh is 180 meshes, and the mesh number of the sieved mesh in step S2 is 300 meshes.
Further, in step S2, the components are mixed by a mixing device, and the rotation speed of the mixing device is 300-500 r/min.
In addition, the invention also relates to the application of the putty powder in the building;
further, the putty powder is mixed with clear water, the mixture is uniformly mixed until no caking exists, and then the mixture is placed still, wherein the weight ratio of the mixture to the clear water is 1: 0.35-0.55.
In the production process of the putty powder, each step is simple to operate, convenient to implement and suitable for mass production; in addition, compared with the existing putty powder, the putty powder provided by the invention does not increase the use difficulty in the use process, and is more convenient to popularize and apply.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail with reference to examples.
The invention relates to putty powder, which comprises the following components in parts by weight: 15-35 parts of Portland cement, 10-30 parts of heavy calcium carbonate, 3-10 parts of talcum powder, 0.5-1.5 parts of redispersible latex powder, 0.7-2 parts of mildew preventive, 0.2-0.5 part of wood fiber and 0.2-0.5 part of amylase.
Wherein, the mildew preventive comprises at least one of nano titanium dioxide, calcium propionate and sodium benzoate, and each component of the mildew preventive comprises 0.5 to 1 part of nano titanium dioxide, 0.1 to 0.5 part of calcium propionate and 0.1 to 0.5 part of sodium benzoate according to weight percentage. The addition of the mildew preventive can enable the putty powder to have good mildew resistance, and the nano titanium dioxide in the putty powder not only has very high thermal stability and chemical stability, strong hydrophilicity and strong bactericidal property, but also is beneficial to enhancing the mechanical property of wood fibers.
In addition, the lignocellulose has the functions of ventilation and water retention, and the moisture resistance of the putty can be effectively improved.
Finally, the addition of the amylase can enable the putty powder to have good anti-dropping performance, and the addition of the redispersible latex powder can increase the leveling performance of the putty powder, so that the putty powder can have excellent leveling performance and bonding performance by adding the amylase and the redispersible latex powder.
In conclusion, the putty powder disclosed by the invention prevents the putty from being pulverized and falling off by increasing the moisture resistance and improving the self advection and cohesiveness; and the mildew resistance is improved, so that spots and the like generated by mildew of the wall body can be reduced, the two aspects are combined, and the attractiveness of the wall body which uses the putty powder and is used as a surface decoration layer is effectively improved.
The preparation process of the putty powder comprises two steps:
firstly, sieving all materials of the mildew preventive, and then mixing, wherein the sieved mesh number in the step is 180 meshes;
and secondly, sieving the portland cement, the ground calcium carbonate, the talcum powder, the redispersible polymer rubber powder, the wood fiber and the amylase, and then mixing the sieved materials with the mildew preventive in the first step to prepare the putty powder. In the step, the sieving mesh of each material is 300 meshes, the mixing process adopts mixing equipment for mixing, and the rotating speed of the mixing equipment is 300-500 r/min.
When the putty powder is used, the putty powder and clear water are uniformly mixed until no agglomeration exists, and then the putty powder is placed still, so that normal construction and use can be carried out. It should be noted that, when the putty powder and the clear water are mixed, the weight ratio of the putty powder to the clear water is 1: 0.35-0.55.
The putty powder, its preparation method and its application will be further described in the following with several specific examples.
Example 1
The embodiment provides putty powder which is prepared by mixing 15 parts of Portland cement, 10 parts of ground calcium carbonate, 3 parts of talcum powder, 0.5 part of redispersible latex powder, 0.7 part of mildew preventive, 0.2 part of wood fiber and 0.2 part of amylase according to a proportion.
The mildew preventive in the embodiment adopts nano titanium dioxide, calcium propionate and sodium benzoate, and the proportions of the nano titanium dioxide, the calcium propionate and the sodium benzoate are 0.5 part, 0.1 part and 0.1 part respectively.
The preparation method of the putty powder comprises the following steps:
s1, sieving the three materials of the mildew preventive, wherein the sieved mesh number is 180 meshes, and then uniformly mixing the three sieved materials;
and S2, sieving the Portland cement, the ground limestone, the talcum powder, the redispersible polymer rubber powder, the wood fiber and the amylase, wherein the sieving mesh number is 300 meshes, and finally mixing the sieved materials with the mildew preventive by adopting a mixing device, wherein the rotating speed of the mixing device is 300r/min, so that the putty powder is prepared.
The using method of the putty powder comprises the following steps:
mixing putty powder with clear water, uniformly mixing until no agglomeration exists, standing, wherein the weight ratio of the putty powder to the clear water is 1: 0.35.
example 2
The embodiment provides putty powder which is prepared by mixing 15 parts of Portland cement, 10 parts of ground calcium carbonate, 3 parts of talcum powder, 0.5 part of redispersible latex powder, 0.7 part of mildew preventive, 0.2 part of wood fiber and 0.2 part of amylase according to a proportion.
The mildew preventive in the embodiment adopts nano titanium dioxide, calcium propionate and sodium benzoate, and the proportions of the nano titanium dioxide, the calcium propionate and the sodium benzoate are 0.5 part, 0.1 part and 0.1 part respectively.
The preparation method of the putty powder comprises the following steps:
s1, sieving the three materials of the mildew preventive, wherein the sieved mesh number is 180 meshes, and then uniformly mixing the three sieved materials;
and S2, sieving the Portland cement, the ground limestone, the talcum powder, the redispersible polymer rubber powder, the wood fiber and the amylase, wherein the sieving mesh number is 300 meshes, and finally mixing the sieved materials with the mildew preventive by adopting a mixing device, wherein the rotating speed of the mixing device is 500r/min, so that the putty powder is prepared.
The using method of the putty powder comprises the following steps:
mixing putty powder with clear water, uniformly mixing until no agglomeration exists, standing, wherein the weight ratio of the putty powder to the clear water is 1: 0.35.
example 3
The embodiment provides putty powder which is prepared by mixing 35 parts of Portland cement, 30 parts of ground calcium carbonate, 10 parts of talcum powder, 1.5 parts of redispersible latex powder, 2 parts of mildew preventive, 0.5 part of wood fiber and 0.5 part of amylase according to a proportion.
The mildew preventive in the embodiment adopts nano titanium dioxide, calcium propionate and sodium benzoate, and the proportions of the nano titanium dioxide, the calcium propionate and the sodium benzoate are 1 part, 0.5 part and 0.5 part respectively.
The preparation method of the putty powder comprises the following steps:
s1, sieving the three materials of the mildew preventive, wherein the sieved mesh number is 180 meshes, and then uniformly mixing the three sieved materials;
and S2, sieving the Portland cement, the ground limestone, the talcum powder, the redispersible polymer rubber powder, the wood fiber and the amylase, wherein the sieving mesh number is 300 meshes, and finally mixing the sieved materials with the mildew preventive by adopting a mixing device, wherein the rotating speed of the mixing device is 300r/min, so that the putty powder is prepared.
The using method of the putty powder comprises the following steps:
mixing putty powder with clear water, uniformly mixing until no agglomeration exists, standing, wherein the weight ratio of the putty powder to the clear water is 1: 0.35.
example 4
The embodiment provides putty powder which is prepared by mixing 35 parts of Portland cement, 30 parts of ground calcium carbonate, 10 parts of talcum powder, 1.5 parts of redispersible latex powder, 2 parts of mildew preventive, 0.5 part of wood fiber and 0.5 part of amylase according to a proportion.
The mildew preventive in the embodiment adopts nano titanium dioxide, calcium propionate and sodium benzoate, and the proportions of the nano titanium dioxide, the calcium propionate and the sodium benzoate are 1 part, 0.5 part and 0.5 part respectively.
The preparation method of the putty powder comprises the following steps:
s1, sieving the three materials of the mildew preventive, wherein the sieved mesh number is 180 meshes, and then uniformly mixing the three sieved materials;
and S2, sieving the Portland cement, the ground limestone, the talcum powder, the redispersible polymer rubber powder, the wood fiber and the amylase, wherein the sieving mesh number is 300 meshes, and finally mixing the sieved materials with the mildew preventive by adopting a mixing device, wherein the rotating speed of the mixing device is 500r/min, so that the putty powder is prepared.
The using method of the putty powder comprises the following steps:
mixing putty powder with clear water, uniformly mixing until no agglomeration exists, standing, wherein the weight ratio of the putty powder to the clear water is 1: 0.55.
example 5
The embodiment provides putty powder which is prepared by mixing 35 parts of Portland cement, 30 parts of ground calcium carbonate, 10 parts of talcum powder, 1.5 parts of redispersible latex powder, 0.8 part of mildew preventive, 0.5 part of wood fiber and 0.5 part of amylase according to a proportion.
The mildew preventive in the embodiment adopts nano titanium dioxide.
The preparation method of the putty powder comprises the following steps:
s1, sieving the mildew preventive with 180 meshes;
and S2, sieving the Portland cement, the ground limestone, the talcum powder, the redispersible polymer rubber powder, the wood fiber and the amylase, wherein the sieving mesh number is 300 meshes, and finally mixing the sieved materials with the mildew preventive by adopting a mixing device, wherein the rotating speed of the mixing device is 400r/min, so that the putty powder is prepared.
The using method of the putty powder comprises the following steps:
mixing putty powder with clear water, uniformly mixing until no agglomeration exists, standing, wherein the weight ratio of the putty powder to the clear water is 1: 0.4.
example 6
The embodiment provides putty powder which is prepared by mixing 28 parts of Portland cement, 18 parts of ground calcium carbonate, 8 parts of talcum powder, 1.2 parts of redispersible latex powder, 1.1 parts of mildew preventive, 0.4 part of wood fiber and 0.4 part of amylase according to a proportion.
The mildew inhibitor in the embodiment adopts nano titanium dioxide and calcium propionate, and the proportion of the nano titanium dioxide and the calcium propionate is 0.8 part and 0.3 part.
The preparation method of the putty powder comprises the following steps:
s1, sieving the two materials of the mildew preventive, wherein the sieving mesh is 180 meshes, and then uniformly mixing the two sieved materials;
and S2, sieving the Portland cement, the ground limestone, the talcum powder, the redispersible polymer rubber powder, the wood fiber and the amylase, wherein the sieving mesh number is 300 meshes, and finally mixing the sieved materials with the mildew preventive by adopting a mixing device, wherein the rotating speed of the mixing device is 400r/min, so that the putty powder is prepared.
The using method of the putty powder comprises the following steps:
mixing putty powder with clear water, uniformly mixing until no agglomeration exists, standing, wherein the weight ratio of the putty powder to the clear water is 1: 0.43.
example 7
The embodiment provides putty powder which is prepared by mixing 20 parts of Portland cement, 15 parts of ground limestone, 5 parts of talcum powder, 1 part of vinyl acetate-ethylene copolymer emulsion, 1.3 parts of mildew preventive, 0.3 part of wood fiber and 0.3 part of amylase according to a proportion.
The mildew preventive in the embodiment adopts nano titanium dioxide, calcium propionate and sodium benzoate, and the proportions of the nano titanium dioxide, the calcium propionate and the sodium benzoate are 0.7 part, 0.3 part and 0.3 part respectively.
The preparation method of the putty powder comprises the following steps:
s1, sieving the two materials of the mildew preventive, wherein the sieving mesh is 180 meshes, and then uniformly mixing the two sieved materials;
and S2, sieving the Portland cement, the ground limestone, the talcum powder, the redispersible polymer rubber powder, the wood fiber and the amylase, wherein the sieving mesh number is 300 meshes, and finally mixing the sieved materials with the mildew preventive by adopting a mixing device, wherein the rotating speed of the mixing device is 400r/min, so that the putty powder is prepared.
The using method of the putty powder comprises the following steps:
mixing putty powder with clear water, uniformly mixing until no agglomeration exists, standing, wherein the weight ratio of the putty powder to the clear water is 1: 0.48.
example 8
The embodiment provides putty powder which is prepared by mixing 30 parts of portland cement, 30 parts of ground limestone, 10 parts of talcum powder, 1.5 parts of vinyl acetate-ethylene copolymer emulsion, 2 parts of mildew preventive, 0.5 part of wood fiber and 0.5 part of amylase according to a proportion.
The mildew preventive in the embodiment adopts nano titanium dioxide, calcium propionate and sodium benzoate, and the proportions of the nano titanium dioxide, the calcium propionate and the sodium benzoate are 1 part, 0.5 part and 0.5 part respectively.
The preparation method of the putty powder comprises the following steps:
s1, sieving the two materials of the mildew preventive, wherein the sieving mesh is 180 meshes, and then uniformly mixing the two sieved materials;
and S2, sieving the Portland cement, the ground limestone, the talcum powder, the redispersible polymer rubber powder, the wood fiber and the amylase, wherein the sieving mesh number is 300 meshes, and finally mixing the sieved materials with the mildew preventive by adopting a mixing device, wherein the rotating speed of the mixing device is 400r/min, so that the putty powder is prepared.
The using method of the putty powder comprises the following steps:
mixing putty powder with clear water, uniformly mixing until no agglomeration exists, standing, wherein the weight ratio of the putty powder to the clear water is 1: 0.5.
comparative example
The formula of the existing mildew-proof antibacterial putty on the market at present comprises the following materials in percentage by mass: 20 parts of Portland cement, 20 parts of ash calcium, 80 parts of talcum powder, 0.5 part of hydroxyethyl methyl cellulose, 10 parts of thiophanate-methyl, 1.0 part of polyvinyl alcohol and 1.0 part of amylase.
The preparation method comprises the following steps: uniformly mixing portland cement, gray calcium, talcum powder, hydroxyethyl methyl cellulose, a mildew preventive, polyvinyl alcohol and amylase to obtain the mildew-proof antibacterial putty powder.
Directly mixing the components, adding water to mix into paste, and performing blade coating, wherein the mass ratio of the putty powder to the clear water is 7: 3.
Performance testing
First, antibacterial property test
The putty powder is prepared according to the proportion of each embodiment, the mildew resistance is tested, and the mildew resistance is tested according to the requirements of HG/T3950-2007, and the results are shown in Table 1.
TABLE 1
From the experimental data in table 1, it can be seen that the putty prepared by the methods of the embodiments has the effects of resisting aspergillus niger, aspergillus terreus, paecilomyces variotii, penicillium funiculosum, aureobasidium pullulans and chaetomium globosum, and can achieve the level I effect and meet the HG/T3950-2007 standard.
The result shows that the putty powder has excellent mildew resistance, and especially in the embodiment 4 and the embodiment 7, the putty powder has more excellent mildew resistance due to the addition of the nano titanium dioxide, the calcium propionate and the sodium benzoate.
Second, bond Strength test
The putty powder is prepared according to the proportion of each embodiment, meanwhile, according to the use method in each embodiment, each process is ensured to be constructed strictly according to the construction process, after the last putty construction is finished, the putty is cured for 14 days, and then the bonding strength test of the on-site putty coating is carried out according to the building putty bonding strength on-site test method in appendix A of DBJ/T13-185-2014 'construction and acceptance Specification'. In order to ensure the scientificity of the experimental results, multiple sets of experiments need to be performed simultaneously, and corresponding data are collected for analysis, wherein the experimental data are shown in table 2.
TABLE 2
The experimental data in table 2 show that the failure forms of the putty powder disclosed by the invention are cohesive failures, all of which meet the technical requirements of common exterior wall putty powder in the existing standard JC/T157-2009 putty for building exterior walls, and the putty powder can be applied to actual construction.
The results show that the putty powder disclosed by the invention has excellent bonding strength, especially in examples 2 and 4, and the addition of the redispersible latex powder, amylase and wood fiber enables the putty powder to have higher bonding strength.
Third, leveling test
Paint leveling refers to the ability of the paint to spread on its own and eliminate various surface irregularities during drying after application. The method for detecting the leveling property comprises the following steps: and (3) placing the scraped test surface for drying, wherein the drying condition is specified according to the standard of a coating product or the construction condition. The appearance was then observed: 1. and (4) observing whether the coating has the phenomena of shrinkage cavity, shrinkage edge, orange peel and the like which are not flat, and judging the coating to be qualified if the coating is uniformly distributed without abnormal phenomena. 2. And (4) observing whether the water drops are not diffused or slowly diffused and are not round or not by the water drops, and judging the water drops to be qualified if the water drops are diffused and the property rules are not changed.
The results show that the putty powder disclosed by the invention has excellent leveling property, and particularly in the examples 2 and 4, the redispersible latex powder and the amylase are added to show more excellent leveling property.
In conclusion, the putty powder prepared by the invention has excellent antibacterial performance, bonding strength and leveling property.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The putty powder is characterized by comprising the following components in parts by weight: 15-35 parts of Portland cement, 10-30 parts of heavy calcium carbonate, 3-10 parts of talcum powder, 0.5-1.5 parts of redispersible latex powder, 0.7-2 parts of mildew preventive, 0.2-0.5 part of wood fiber and 0.2-0.5 part of amylase.
2. The putty powder of claim 1, further comprising: the mildew preventive comprises at least one of nano titanium dioxide, calcium propionate and sodium benzoate.
3. The putty powder of claim 2, wherein: the components of the mildew preventive comprise, by weight, 0.5-1 part of nano titanium dioxide, 0.1-0.5 part of calcium propionate and 0.1-0.5 part of sodium benzoate.
4. The putty powder of any one of claims 1-3, characterized in that: the redispersible latex powder comprises a vinyl acetate-ethylene copolymer.
5. The preparation method of the putty powder is characterized by comprising the following steps:
s1, sieving the mildew preventive;
s2, sieving the Portland cement, the ground calcium carbonate, the talcum powder, the redispersible polymer powder, the wood fiber and the amylase, and mixing the sieved materials with the mildew preventive to obtain the putty powder.
6. The preparation method of the putty powder as claimed in claim 5, which is characterized in that: the mildew preventive comprises at least one of nano titanium dioxide, calcium propionate and sodium benzoate.
7. The preparation method of the putty powder as claimed in claim 6, which is characterized in that: in step S1, the nano titanium dioxide, the calcium propionate and the sodium benzoate are respectively sieved and then uniformly mixed, the mesh number of the sieved mesh is 180 meshes, and the mesh number of the sieved mesh in step S2 is 300 meshes.
8. The method for preparing putty powder as recited in any one of claims 5 to 7, wherein the method comprises the following steps: in step S2, the components are mixed by a mixing device, and the rotation speed of the mixing device is 300-500 r/min.
9. Use of the putty powder of any one of claims 1-4 in construction.
10. The use of the putty powder of claim 9: mixing the putty powder with clear water, uniformly mixing until no agglomeration exists, and standing, wherein the weight ratio of the mixture to the clear water is 1: 0.35-0.55.
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Cited By (1)
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| CN116589880A (en) * | 2023-04-07 | 2023-08-15 | 深圳市科建建设集团有限公司 | Formaldehyde-removing environment-friendly putty and preparation method thereof |
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| CN111995898A (en) * | 2020-10-12 | 2020-11-27 | 贵州贵安碳酸钙实业发展有限公司 | Waterproof and mildew-proof interior wall putty powder and preparation method thereof |
| CN112011207A (en) * | 2020-10-12 | 2020-12-01 | 深圳广田高科新材料有限公司 | Machine-sprayed putty powder for external wall and preparation method and use method thereof |
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| CN116589880A (en) * | 2023-04-07 | 2023-08-15 | 深圳市科建建设集团有限公司 | Formaldehyde-removing environment-friendly putty and preparation method thereof |
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