CN113667332A - Liquid inorganic silicate paint for color-adjustable inner wall and preparation method thereof - Google Patents
Liquid inorganic silicate paint for color-adjustable inner wall and preparation method thereof Download PDFInfo
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- CN113667332A CN113667332A CN202111031610.4A CN202111031610A CN113667332A CN 113667332 A CN113667332 A CN 113667332A CN 202111031610 A CN202111031610 A CN 202111031610A CN 113667332 A CN113667332 A CN 113667332A
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- 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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
- C09D1/02—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates
- C09D1/04—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates with organic additives
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Abstract
The invention relates to a liquid inorganic silicate paint for color-adjustable interior walls and a preparation method thereof, wherein the liquid inorganic silicate paint is mainly prepared from the following components in parts by weight:
the invention overcomes the defects of high molecular organic matter content of more than or equal to 5 percent, poor color matching effect, large color difference, even floating color and the like of the existing inorganic coating, and ensures that the liquid inorganic silicon for the color-adjustable inner wall is matched with other components with optimal types and dosage proportions in a system by adopting calcium sulfate whiskers with optimal length, diameter and length-diameter ratio and introducing special cellulose ether-HMHEC celluloseThe acid salt coating has the advantages of low content of high molecular organic matters and good color matching effect, has small color difference, does not generate flooding, and also has good brushing resistance and air permeability.
Description
Technical Field
The invention relates to a liquid inorganic silicate paint for color-adjustable interior walls and a preparation method thereof, which are applied to the field of liquid inorganic paints.
Background
The coating industry is a unique raw material intensive manufacturing industry, in the production process, most of the main materials used by the organic coating are solvents, pigments and auxiliaries harmful to human bodies, and Volatile Organic Compounds (VOC) are discharged into the atmosphere in the production process, so that the environment is greatly polluted. With the stricter requirements on environmental protection of various countries in the world, the continuous improvement of VOC emission standards and the gradual enhancement of environmental awareness of people in recent years, low-pollution and environment-friendly coatings in the coating industry also become a new development trend. Among them, inorganic architectural coatings are receiving more and more attention due to their excellent environmental protection properties, and their significant cost and performance advantages in terms of performance, as compared to organic architectural coatings.
The inorganic coating on the market at present has various types, but really accords with the type I of the inner wall in the standard revision approval draft of JG/T26-XXXX liquid inorganic coating for the inner and outer walls of buildings (see the detail in
https://max.book118.com/html/2019/0610/6054123210002035.shtm
Or https:// www.doc88.com/p-98073133618251.html) requires very little in respect of the content of macromolecular organic substances < 5%. Even if the color can meet the requirement, the color difference of the color is serious, and particularly, the color is seriously loose when the color is modulated into dark colors such as gray, black and the like. The reason for the difficult color mixing is that if the color paste is directly used in an inorganic product system with higher ph, the alkali metal silicate in the system can destroy the wetting dispersant layer coated on the periphery of the color paste pigment particles, so that the pigment particles are directly exposed, the pigment particles are flocculated, the stable system of the color paste is destroyed, the hue index of the color can be slowly changed, the problems of flooding, floating and color change are caused, and the color mixing property is extremely poor.
Therefore, it is desirable to provide a liquid inorganic silicate paint for color-adjustable interior walls, which has low content of high molecular organic substances, good color-adjusting effect, small color difference, no color floating, good brushing resistance and good air permeability, and a preparation method thereof.
Disclosure of Invention
In order to overcome the defects of high molecular organic matter content of more than or equal to 5 percent, poor color matching effect, large color difference, even floating color and the like of the existing inorganic coating, the invention provides the liquid inorganic silicate coating for the color-tunable inner wall, and the liquid inorganic silicate coating for the color-tunable inner wall has the advantages of low high molecular organic matter content, good color matching effect, small color difference, no floating color, good brushing resistance and good air permeability by adopting the calcium sulfate whiskers with the optimal length, diameter and length-diameter ratio, introducing the special cellulose ether-HMHEC cellulose and matching with other components with the optimal types and dosage proportions in the system.
The technical scheme of the invention is as follows:
the liquid inorganic silicate paint for the color-adjustable inner wall is mainly prepared from the following components in parts by weight:
the calcium sulfate whisker is 10-150 mu m long, 1-8 mu m in diameter and 5-80 in length-diameter ratio; the mass concentration of the potassium silicate solution is 35-45%.
The liquid inorganic silicate paint for the color-adjustable interior wall has low VOC emission, and the paint penetrates deep into inorganic mineral substance substrates (such as a putty layer and a mixed soil layer) and forms permanent and long-term chemical bonding effect with a base layer. The mechanism is as follows: when the silicate is dissolved in water, the hydroxide ions at the silicate's roots are rapidly and continuously hydrolyzed and polymerized to form an orthosilicate Si (OH)4Silicic acid with single non-acidic molecular atom is continuously polymerized under the interaction of various electrolytes to form high polymer poly-silicic acid, and then gradually dehydrated to generate an acidic coating film alternating layer similar to a ring-shaped film structure of a nanotube, which is called poly-silicon dioxide and is also a silicate film coating; in addition, it is considered that the water glass paint is prepared by applying a solution to the surface of an object and immediately mixing with CO in the air2Reacting to generate ortho-silicic acid, polymerizing and drying the ortho-silicic acid in a single molecule step by step to form a bonding network tissue, and curing to form a film. Different from the traditional organic coating which is physically formed into a film and is only adhered to the surface of a base material through mechanical adhesion, the inorganic coating has the porosity which can allow water vapor to freely pass through,but not enough to let liquid water pass and allow the free passage of water vapor (breathability) eliminates the problems of bubble generation and paint film peeling in the paint film, and the paint film of the paint has higher adhesion and scrub resistance under the action of pure water glass. The calcium sulfate whisker with the optimal length, diameter and length-diameter ratio is adopted, and the calcium sulfate whisker is favorable for improving the washing resistance and the compatibility of the product to inorganic color paste; the special cellulose ether-HMHEC cellulose (hydrophobic association hydroxyethyl cellulose) is introduced, and the cellulose is different from the hydroxyethyl cellulose commonly used in the traditional inorganic coating system in that a hydrophobic modification group of the cellulose is composed of alkyl long chains connected to a polymer main chain, so that the system has excellent storage stability and color paste stability. The HMHEC-based cellulose is preferably plus550, manufactured by ashland usa, which has excellent stability, excellent leveling and sag resistance, and excellent mill base stability. Through the uniform dispersion and the special physical structure of the optimized calcium sulfate whisker in the system, the calcium sulfate whisker is matched with a wetting agent and a dispersing agent, and the HMHEC cellulose is matched to anchor the color paste by rivets, so that the effect of stable color mixing is achieved. The calcium sulfate whisker and the HMHEC cellulose are matched with other components with the optimized types and dosage proportions in the system, so that the usage amount of the organic emulsion is greatly reduced on the basis of keeping the original advantageous characteristics of the inorganic coating, the content of high molecular organic matters is less than 5 percent, and meanwhile, the color matching effect is good, the color difference is small, the floating color is avoided, and the brushing resistance and the air permeability are good. Meanwhile, compared with the formula of the traditional inorganic coating, the formula of the liquid inorganic silicate coating for the color-adjustable interior wall is simpler in composition, and all properties of the product are excellent. In addition, the liquid inorganic silicate paint for the color-adjustable interior wall has excellent storage stability, can keep stable viscosity under the condition of hot storage (50 ℃ and 30 days), and has the viscosity fluctuation range of +/-5 KU at 25 ℃. The viscosity of the liquid inorganic silicate paint for the color-adjustable inner wall at 25 ℃ is 90-100ku, and the construction performance is excellent.
The defoaming agent comprises one or any combination of more than two of mineral oil defoaming agents or organosilicon defoaming agents.
The preferable defoaming agent has low cost and good defoaming effect.
The defoaming agent comprises a mineral oil defoaming agent and an organic silicon defoaming agent, and the weight ratio of the mineral oil defoaming agent to the organic silicon defoaming agent is 1:2-1: 2.17.
The preferable type and the using amount ratio of the defoaming agent have better defoaming effect.
The anti-settling agent is bentonite for common paint.
The preferable anti-settling agent is easy to obtain and low in cost.
The mildew preventive is a high-alkali-resistant mildew preventive.
The preferred mildew preventive has good mildew preventive effect.
The preparation method of the liquid inorganic silicate paint for the color-adjustable interior wall mainly comprises the following steps of:
(1) adding water accounting for 28-32% of the total weight of the stirrer into a stirring container of the stirrer, regulating the stirring speed of the stirrer to be 500-600r/min, then sequentially adding a wetting agent, a dispersing agent and a defoaming agent accounting for 1.5-9.5% of the total weight of the stirrer, and dispersing for 5-10 min;
(2) adjusting the stirring speed to 1500-1800r/min, sequentially adding diatomite, calcined kaolin, barium sulfate and calcium sulfate whiskers into the mixture obtained in the step (1), and dispersing for at least 5 min;
(3) keeping the stirring speed at 1500-1800r/min, sequentially adding HMHEC cellulose, an anti-settling agent and water accounting for 28-32% of the total weight of the mixture obtained in the step (2) and dispersing until the fineness is less than or equal to 50 um;
(4) and (4) adjusting the stirring speed to 700-900r/min, sequentially adding the acrylic emulsion, the potassium silicate solution, the mildew preventive, the residual defoaming agent and the residual water into the mixture obtained in the step (3), and dispersing for at least 10 minutes to obtain the liquid inorganic silicate coating for the color-adjustable interior wall.
The preparation method of the liquid inorganic silicate paint for the color-adjustable inner wall has simple steps and is convenient to manufacture.
The defoaming agent in the step (1) comprises a mineral oil defoaming agent and an organic silicon defoaming agent, and the weight ratio of the mineral oil defoaming agent to the organic silicon defoaming agent is 1: 1; the defoaming agent in the step (4) is an organic silicon defoaming agent.
The preferable type and the using amount ratio of the defoaming agent have better defoaming effect.
Compared with the prior art, the method has the following advantages:
1) according to the liquid inorganic silicate coating for the color-adjustable inner wall, the calcium sulfate whiskers with the optimal length, diameter and length-diameter ratio are adopted, the special cellulose ether-HMHEC cellulose is introduced, and the special cellulose ether-HMHEC cellulose is matched with other components with the optimal types and dosage proportions in a system, so that the liquid inorganic silicate coating for the color-adjustable inner wall has the advantages of low content of high-molecular organic matters and good color-adjusting effect, is small in color difference and free from color floating, and also has good scrubbing resistance and air permeability;
2) the preferable type and the dosage of the defoaming agent have better defoaming effect;
3) the preparation method of the liquid inorganic silicate paint for the color-adjustable inner wall has simple steps and is convenient to manufacture.
Drawings
FIG. 1 is a graph of the color-developing test results of a control of the liquid inorganic silicate paint for interior wall with color-adjustable according to the present invention in FIG. 1;
FIG. 2 is a graph showing the results of color-developing tests of a control of the liquid inorganic silicate paint for interior wall with color tunable property according to the present invention in FIG. 2;
FIG. 3 is a graph of the color-developing test results of example 1 of the liquid inorganic silicate coating for interior wall with adjustable color according to the present invention in FIG. 1;
FIG. 4 is a graph of the color-developing test results of example 1 of the liquid inorganic silicate coating for interior wall with adjustable color according to the present invention in FIG. 2.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the embodiments of the specification.
Example 1
The invention relates to a liquid inorganic silicate paint for color-adjustable interior walls, which is mainly prepared from the following components in parts by weight:
the calcium sulfate whisker is 80 mu m in length, 6 mu m in diameter and 60 in length-diameter ratio; the mass concentration of the potassium silicate solution is 40%.
The 1.5 parts of defoaming agent comprises 0.5 part of mineral oil defoaming agent and 1 part of organosilicon defoaming agent.
The anti-settling agent is bentonite for common paint. The mildew preventive is a high-alkali-resistant mildew preventive.
The preparation method of the liquid inorganic silicate paint for the color-adjustable interior wall mainly comprises the following steps of:
(1) adding water accounting for 30% of the total weight of the stirrer into a stirring container of the stirrer, adjusting the stirring speed of the stirrer to 550r/min, sequentially adding a wetting agent, a dispersing agent and a defoaming agent accounting for 6% of the total weight of the stirrer, and dispersing for 8 min;
(2) adjusting the stirring speed to 1700r/min, sequentially adding diatomite, calcined kaolin, barium sulfate and calcium sulfate whiskers into the mixture obtained in the step (1), and dispersing for 5 min;
(3) keeping the stirring speed at 1700r/min, sequentially adding HMHEC cellulose, an anti-settling agent and water accounting for 30 percent of the total weight of the mixture obtained in the step (2), and dispersing until the fineness is less than or equal to 50 um;
(4) and (3) adjusting the stirring speed to 800r/min, sequentially adding the acrylic emulsion, the potassium silicate solution, the mildew preventive, the residual organosilicon defoaming agent and the residual water into the mixture obtained in the step (3), and dispersing for 10 minutes to obtain the liquid inorganic silicate coating for the color-adjustable interior wall.
Example 2
The invention relates to a liquid inorganic silicate paint for color-adjustable interior walls, which is mainly prepared from the following components in parts by weight:
the calcium sulfate whisker is 10 mu m in length, 8 mu m in diameter and 5 in length-diameter ratio; the mass concentration of the potassium silicate solution is 35%.
The 9.5 parts of defoaming agent comprise 3 parts of mineral oil defoaming agent and 6.5 parts of organosilicon defoaming agent.
The preparation method of the liquid inorganic silicate paint for the color-adjustable interior wall mainly comprises the following steps of:
(1) adding water accounting for 28 percent of the total weight of the stirrer into a stirring container of the stirrer, regulating the stirring speed of the stirrer to 600r/min, then sequentially adding a wetting agent, a dispersing agent and a defoaming agent accounting for 1.5 percent of the total weight of the stirrer, and dispersing for 10 min;
(2) adjusting the stirring speed to 1500r/min, sequentially adding diatomite, calcined kaolin, barium sulfate and calcium sulfate whiskers into the mixture obtained in the step (1), and dispersing for 6 min;
(3) keeping the stirring speed at 1500r/min, sequentially adding HMHEC cellulose, an anti-settling agent and water accounting for 28 percent of the total weight of the mixture into the mixture obtained in the step (2), and dispersing until the fineness is less than or equal to 50 um;
(4) and (4) adjusting the stirring speed to 900r/min, sequentially adding the acrylic emulsion, the potassium silicate solution, the mildew preventive, the residual organosilicon defoaming agent and the residual water into the mixture obtained in the step (3), and dispersing for 12 minutes to obtain the liquid inorganic silicate coating for the color-adjustable interior wall.
Example 3
The invention relates to a liquid inorganic silicate paint for color-adjustable interior walls, which is mainly prepared from the following components in parts by weight:
the calcium sulfate whisker is 150 mu m in length, 1 mu m in diameter and 80 in length-diameter ratio; the mass concentration of the potassium silicate solution is 45%.
The preparation method of the liquid inorganic silicate paint for the color-adjustable interior wall mainly comprises the following steps of:
(1) adding water accounting for 32 percent of the total weight of the stirrer into a stirring container of the stirrer, regulating the stirring speed of the stirrer to 500r/min, then sequentially adding a wetting agent, a dispersing agent and a defoaming agent accounting for 9.5 percent of the total weight of the stirrer, and dispersing for 5 min;
(2) adjusting the stirring speed to 1800r/min, sequentially adding diatomite, calcined kaolin, barium sulfate and calcium sulfate whiskers into the mixture obtained in the step (1), and dispersing for 8 min;
(3) keeping the stirring speed at 1800r/min, sequentially adding HMHEC cellulose, an anti-settling agent and water accounting for 32 percent of the total weight of the mixture into the mixture obtained in the step (2), and dispersing until the fineness is less than or equal to 50 um;
(4) and (4) adjusting the stirring speed to 700r/min, sequentially adding the acrylic emulsion, the potassium silicate solution, the mildew preventive, the residual organosilicon defoaming agent and the residual water into the mixture obtained in the step (3), and dispersing for 12 minutes to obtain the liquid inorganic silicate coating for the color-adjustable interior wall.
The raw material information related to each embodiment of the present application:
wetting agent: LCN070 by clarien chemical (china) ltd;
dispersing agent: rohm Hass 731A;
HMHEC type cellulose: ashland americana Plus 550;
calcium sulfate whisker: shanghai Geranium or Suzhou Hengnaida New materials Co;
acrylic emulsion: rossfur 5588, Bardful RS-837A or Baolijia BLJ-WG 1809A;
potassium silicate used for potassium silicate solution: the Olympic chemical industry or the Pevine chemical industry.
Experimental data:
paint film performance parameters of liquid inorganic silicate paint for color-adjustable interior walls in each embodiment
The detection method comprises the following steps:
limiting substance parameters (including Volatile Organic Compound (VOC) content, formaldehyde content, benzene, toluene, ethylbenzene, xylene total, soluble heavy metal content): refer to the interior wall coating standard in the technical requirements of water-based coating environmental marking products HJ 2537 and 2014.
Mildew resistance parameters (mold resistance): refer to the 0-grade standard in paint film resistance determination GB/T1741-2020.
Other performance indexes are as follows: refer to the type I standard of interior wall in the "liquid inorganic coating for interior and exterior walls of building" JG/T26-XXXX revised approval for later implementation.
Table 1 results of performance parameter measurements of the examples
As can be seen from Table 1, the liquid inorganic silicate paints for interior walls with adjustable color of the examples of the present invention have low content of high molecular organic substances and good brushing resistance and air permeability.
(II) color developability test results
And (3) comparison: badji GI9100 inorganic paint for inner wall;
the detection method comprises the following steps:
adding 8% of inorganic color paste (wherein "gray" is iron black color paste with 4% of the self weight of the added paint) into the liquid inorganic silicate paint for the color-adjustable interior wall of the comparison sample and the example 1, mixing uniformly, and brushing on white paper (refer to GB/T21090-2007 color-adjustable latex base paint) until the paint film is dried out (as shown in figures 1-4)). Wherein, the upper row of each graph is the color spreading result at normal temperature, and the lower row is the color spreading result of the paint film after being coated and stored for 7 days at 50 ℃.
Detecting each paint film by using a color difference meter, respectively obtaining detection values of l (brightness), a (red green) and b (yellow blue) of each paint film, and respectively calculating delta l, delta a, delta b and delta E according to the following calculation formulas:
the delta l is marked as l, the delta a is marked as a, and the delta b is marked as b; wherein, the mark l, the mark a and the mark b are respectively standard values of the mark l, the mark a and the mark b, and the detection values of the mark l, the mark a and the mark b are respectively detected values of the mark l, the mark a and the mark b;
The results are as follows:
TABLE 2 color difference test results of control samples
Table 3 example 1 color difference detection results
As can be seen from FIGS. 1 to 4, the paint film of the color-adjustable interior wall coated with the liquid inorganic silicate paint of example 1 has good color-spreading effect after being stored for 7 days at normal temperature and 50 ℃, has no floating color, and meets the relevant standard of GB/T21090-2007. Whereas the flooding of each control is evident in figure 1. As can be seen from tables 2 and 3, the color difference of the comparison sample is larger than that of the embodiment 1, and the color difference of the liquid inorganic silicate coating for the color-adjustable inner wall of the embodiment 1 is between-0.1 and 0.4, and the color difference is small and far exceeds the standard requirement; wherein, the color spreading effect of the iron black and gray color paste is improved most obviously.
In summary, the liquid inorganic silicate paint for interior walls has low content of high molecular organic matters, good brushing resistance and air permeability, good color matching effect, small color difference and no color floating.
The liquid inorganic silicate paint for interior wall with adjustable color and the preparation method thereof according to the present invention are not limited to the above-mentioned examples, and any modification or replacement according to the principle of the present invention should be within the scope of the present invention.
Claims (7)
1. A liquid inorganic silicate paint for color-adjustable interior walls is characterized in that: the adhesive is mainly prepared from the following components in parts by weight:
the calcium sulfate whisker is 10-150 mu m long, 1-8 mu m in diameter and 5-80 in length-diameter ratio; the mass concentration of the potassium silicate solution is 35-45%.
2. The liquid inorganic silicate paint for color-adjustable interior walls according to claim 1, wherein: the defoaming agent comprises one or any combination of more than two of mineral oil defoaming agents or organosilicon defoaming agents.
3. The liquid inorganic silicate paint for color-tunable interior walls according to claim 2, wherein: the defoaming agent comprises a mineral oil defoaming agent and an organic silicon defoaming agent, and the weight ratio of the mineral oil defoaming agent to the organic silicon defoaming agent is 1:2-1: 2.17.
4. The liquid inorganic silicate paint for color-adjustable interior walls according to claim 1, wherein: the anti-settling agent is bentonite for common paint.
5. The liquid inorganic silicate paint for color-adjustable interior walls according to claim 1, wherein: the mildew preventive is a high-alkali-resistant mildew preventive.
6. A method for preparing a liquid inorganic silicate paint for color-adjustable interior walls according to any one of claims 1 to 5, wherein: mainly comprises the following steps which are carried out in sequence:
(1) adding water accounting for 28-32% of the total weight of the stirrer into a stirring container of the stirrer, regulating the stirring speed of the stirrer to be 500-600r/min, then sequentially adding a wetting agent, a dispersing agent and a defoaming agent accounting for 1.5-9.5% of the total weight of the stirrer, and dispersing for 5-10 min;
(2) adjusting the stirring speed to 1500-1800r/min, sequentially adding diatomite, calcined kaolin, barium sulfate and calcium sulfate whiskers into the mixture obtained in the step (1), and dispersing for at least 5 min;
(3) keeping the stirring speed at 1500-1800r/min, sequentially adding HMHEC cellulose, an anti-settling agent and water accounting for 28-32% of the total weight of the mixture obtained in the step (2) and dispersing until the fineness is less than or equal to 50 um;
(4) and (4) adjusting the stirring speed to 700-900r/min, sequentially adding the acrylic emulsion, the potassium silicate solution, the mildew preventive, the residual defoaming agent and the residual water into the mixture obtained in the step (3), and dispersing for at least 10 minutes to obtain the liquid inorganic silicate coating for the color-adjustable interior wall.
7. The method for preparing the liquid inorganic silicate paint for color-adjustable interior walls according to claim 6, wherein the method comprises the following steps: the defoaming agent in the step (1) comprises a mineral oil defoaming agent and an organic silicon defoaming agent, and the weight ratio of the mineral oil defoaming agent to the organic silicon defoaming agent is 1: 1; the defoaming agent in the step (4) is an organic silicon defoaming agent.
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Application publication date: 20211119 |