Inorganic chemical composition and preparation method thereof

Abstract

The invention belongs to the technical field of inorganic chemical industry, and discloses an inorganic chemical composition and a preparation method thereof. The composition is prepared from the following raw materials in parts by weight: 40-50 parts of barium sulfate, 10-20 parts of peptide white powder, 15-25 parts of acrylic resin, 1-2 parts of a silane coupling agent, 1-2 parts of a dispersing agent, 2-5 parts of a plasticizer, 1-3 parts of a tackifier, 10-20 parts of a liquid solvent and 5-10 parts of talcum powder. The silane coupling agent is used for surface modification of barium sulfate, and the modified barium sulfate is added, so that the composition coating not only can improve covering power and glossiness through physical characteristics of barium sulfate, but also can be better dispersed with a resin base material due to surface modification of barium sulfate particles, the surface of the coating is more uniform and smooth, and the surface of the coating is uniform and smooth. And the acrylic resin is combined, so that the water resistance of the composition is ensured, the working performance of the composition in a wet environment is ensured, and the applicability is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of inorganic chemical industry, and specifically relates to an inorganic chemical composition and a preparation method thereof. Background Art

[0002] Inorganic chemical compositions are a mixture of inorganic compounds combined through a specific process, and depending on the ingredients, their application areas are also very broad. Currently, in coating applications, inorganic compounds can significantly improve the performance of coatings, and have good performance in corrosion resistance and thermal insulation.

[0003] At present, in order to improve the hiding power and stability of the coating, barium sulfate is usually added to the composition to improve the performance of the coating. At the same time, barium sulfate has a high relative density. After adding it to the coating, it can increase the thickness of the coating, thereby improving the covering effect and protective performance of the coating. More importantly, barium sulfate has high economic benefits and low cost, making it widely used in the field of coatings.

[0004] However, barium sulfate has a large particle size and a relatively rough surface, which results in poor dispersion in the coating matrix and agglomeration, affecting the uniformity of the coating and the application performance of the coating. Therefore, a long time is required for mixing during preparation, resulting in low production efficiency. Secondly, although barium sulfate itself is insoluble in water, it has a strong hydrophilicity. The addition of barium sulfate will affect the water resistance of the coating, especially in humid environments or long-term contact with water. It may cause the coating to peel off or lose adhesion, so it needs to be improved and optimized. Summary of the invention

[0005] The object of the present invention is to provide an inorganic chemical composition and a preparation method thereof to solve the problems raised in the above background technology.

[0006] In order to achieve the above object, the present invention provides the following technical scheme: an inorganic chemical composition and a preparation method thereof, wherein the composition is made of the following raw materials in parts by weight: 40-50 parts of barium sulfate, 10-20 parts of peptide white powder, 15-25 parts of acrylic resin, 1-2 parts of silane coupling agent, 1-2 parts of dispersant, 2-5 parts of plasticizer, 1-3 parts of tackifier, 10-20 parts of liquid solvent and 5-10 parts of talc, and the preparation steps of the composition are:

[0007] Step 1: barium sulfate modification, using a silane coupling agent to modify the surface of barium sulfate;

[0008] Step 2: Preliminary mixing: mixing and stirring the dispersant and the liquid solvent until they are completely dissolved, and then adding the modified barium sulfate into the solution and mixing;

[0009] Step 3: resin mixing: add acrylic resin, titanium dioxide, plasticizer and tackifier in another container in sequence and stir evenly;

[0010] Step 4: mixing the ingredients, mixing the solution containing barium sulfate in step 2 and the resin solution in step 3, and adding talcum powder to increase fluidity;

[0011] Step five: grinding: grinding and dispersing the mixed composite coating to make it smooth and delicate.

[0012] Preferably, the specific steps of barium sulfate modification are:

[0013] A1, first take out the barium sulfate and silane coupling agent required by the formula, and prepare the silane coupling agent solution and the barium sulfate suspension;

[0014] A2, gradually add the prepared silane coupling agent solution into the barium sulfate suspension and stir slowly;

[0015] A3, the stirring time is set to 60 minutes and the temperature is set to between 50-70°C;

[0016] A4, after the reaction is completed, filter and wash the barium sulfate, remove the excess solvent, and dry it;

[0017] A5, after drying, the surface modification of barium sulfate is completed.

[0018] Preferably, the silane coupling agent is methyltriethoxysilane, which can form a chemically bonded layer on the surface of the barium sulfate when modified with barium sulfate, thereby improving the dispersibility of the barium sulfate and the compatibility with the resin.

[0019] Preferably, the dispersant is polyvinyl alcohol. During the reaction, the polyvinyl alcohol molecules will be fixed on the surface of the barium sulfate to form a protective layer to achieve secondary modification and avoid contact between particles.

[0020] Preferably, in step 2 and step 3, the speed of the stirrer is 300-600 rpm, the temperature is 40° C., and the stirring time is 30 minutes.

[0021] Preferably, the liquid solvent is butyl acetate, which is an organic ester solvent and is responsible for adjusting the concentration and viscosity of the composition.

[0022] Preferably, the barium sulfate is used as the main filler and has a specific surface area of ​​10-20m 2 / g, particle size is 1-5mm.

[0023] Preferably, in step 5, the grinding machine parameters in the grinding stage are set as follows: temperature 25° C., rotation speed 1500-2500 rpm, grinding time 30 minutes, and the proportion of grinding media is 60-80% of the volume of the coating.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1. The present invention performs surface modification on barium sulfate by using a silane coupling agent and by adding modified barium sulfate, so that the composition coating can not only improve hiding power and glossiness through the physical properties of barium sulfate itself, but also because the barium sulfate particles are surface modified, they can be better dispersed with the resin base material, and the coating surface is more uniform and smooth, thereby improving the gloss and visual effect of the coating. In combination with acrylic resin, the water resistance of the composition is guaranteed, ensuring the working performance in a humid environment and improving the applicability.

[0026] 2. The present invention not only improves the durability of the coating by adding modified barium sulfate, but also improves the hardness and wear resistance of the coating in an all-round way due to the high degree of dispersion and uniform dispersion of the barium sulfate particles. The barium sulfate with high hardness and the resin with high flexibility are combined to significantly improve the impact resistance of the coating and reduce the brittleness caused by the addition of barium sulfate, further extending the service life of the coating. For coating compositions that need to withstand harsh environments, the modified barium sulfate can significantly improve the aging resistance of the coating and avoid problems such as premature cracking and fading of the coating.

[0027] 3. The present invention greatly improves the construction performance of the coating through reasonable proportioning and efficient preparation, making it more suitable for various construction processes. Compared with traditional compositions, the coating of the composition has better fluidity and adhesion during the construction process, and the viscosity of the coating can be precisely controlled to avoid dripping or unevenness during the construction process. At the same time, due to the strong chemical stability of barium sulfate, its dispersion stability in the coating is also higher, which can reduce the risk of coating precipitation or stratification, and ensure the consistency and stability of the coating during storage and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The present invention is a flow chart for preparing the inorganic chemical composition;

[0029] Figure 2 This is a flow chart of barium sulfate modification of the present invention. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figure 1 to Figure 2As shown, an embodiment of the present invention provides an inorganic chemical composition and a preparation method thereof. The composition is made of the following raw materials in parts by weight: 40-50 parts of barium sulfate, 10-20 parts of peptide white powder, 15-25 parts of acrylic resin, 1-2 parts of silane coupling agent, 1-2 parts of dispersant, 2-5 parts of plasticizer, 1-3 parts of tackifier, 10-20 parts of liquid solvent and 5-10 parts of talcum powder. The barium sulfate is surface-modified by the silane coupling agent and the modified barium sulfate is added, so that the coating of the composition can not only improve the hiding power and glossiness through the physical properties of the barium sulfate itself, but also because the barium sulfate particles are surface-modified, they can be better dispersed with the resin base material, and the coating surface is more uniform and smooth, thereby improving the gloss and visual effect of the coating. Combined with the acrylic resin, the water resistance of the composition is guaranteed, ensuring the working performance in a humid environment and improving the applicability.

[0032] The preparation steps of the composition are:

[0033] Step 1: barium sulfate modification, using a silane coupling agent to modify the surface of barium sulfate;

[0034] Barium sulfate is used as the main filler, and modified barium sulfate is used to improve its mixing performance in the resin solution to avoid agglomeration.

[0035] Step 2: Preliminary mixing: mixing and stirring the dispersant and the liquid solvent until they are completely dissolved, and then adding the modified barium sulfate into the solution and mixing;

[0036] Step 3: Resin mixing: add acrylic resin, titanium dioxide, plasticizer and tackifier in another container in sequence and stir evenly;

[0037] The acrylic resin provides water resistance to the composition through its own characteristics, and the titanium dioxide is responsible for providing brightness, the plasticizer improves the flexibility of the coating, and the tackifier improves the adhesion performance of the coating.

[0038] Step 4: mixing the ingredients, mixing the solution containing barium sulfate in step 2 and the resin solution in step 3, and adding talcum powder to increase fluidity;

[0039] The addition of talc filler is mainly responsible for optimizing the fluidity of the composition and adjusting the hardness of the coating.

[0040] Step five: grinding: grinding and dispersing the mixed composite coating to make it smooth and delicate.

[0041] Through reasonable proportioning and efficient preparation, the composition greatly improves the construction performance of the coating, making it more suitable for various construction processes. Compared with traditional compositions, the coating of the composition has better fluidity and adhesion during the construction process, and the viscosity of the coating can be precisely controlled to avoid dripping or unevenness during the construction process. At the same time, due to the strong chemical stability of barium sulfate, its dispersion stability in the coating is also higher, which can reduce the risk of coating precipitation or stratification, and ensure the consistency and stability of the coating during storage and use.

[0042] Wherein, the specific steps of barium sulfate modification are:

[0043] A1, first take out the barium sulfate and silane coupling agent required by the formula, and prepare the silane coupling agent solution and the barium sulfate suspension;

[0044] Barium sulfate needs to be crushed into powder, and the concentration of silane coupling agent solution is 1-5%;

[0045] A2, gradually add the prepared silane coupling agent solution into the barium sulfate suspension and stir slowly;

[0046] Ensure that the silane coupling agent can evenly cover the surface of the barium sulfate by stirring slowly;

[0047] A3, the stirring time is set to 60 minutes and the temperature is set to between 50-70°C;

[0048] Promoting the chemical reaction of the coupling agent by temperature control and stirring;

[0049] A4, after the reaction is completed, filter and wash the barium sulfate, remove the excess solvent, and dry it;

[0050] After removing the excess solvent and unreacted silane coupling agent, the temperature is controlled at 60-80°C for drying;

[0051] A5, after drying, the surface modification of barium sulfate is completed.

[0052] The surface of barium sulfate is modified by using a silane coupling agent solution, so that the modified barium sulfate is evenly distributed in the composite coating, the affinity between the barium sulfate and the resin matrix is ​​improved, and the occurrence of agglomeration is avoided.

[0053] The addition of modified barium sulfate not only improves the durability of the coating, but also improves the hardness and wear resistance of the coating in an all-round way due to the high degree of dispersion and uniform dispersion of the barium sulfate particles. The combination of high-hardness barium sulfate and high-flexibility resin significantly improves the impact resistance of the coating and reduces the brittleness caused by the addition of barium sulfate, further extending the service life of the coating. For coating compositions that need to withstand harsh environments, modified barium sulfate can significantly improve the aging resistance of the coating and avoid problems such as premature cracking and fading of the coating.

[0054] Wherein, the silane coupling agent is methyltriethoxysilane, which can form a chemically bonded layer on the surface of the barium sulfate when modified with barium sulfate, thereby improving the dispersibility of the barium sulfate and the compatibility of the resin.

[0055] The problem of poor dispersibility of barium sulfate in coatings was effectively solved by modifying barium sulfate.

[0056] Wherein, the dispersant is polyvinyl alcohol, and during the reaction, the polyvinyl alcohol molecules will be fixed on the surface of the barium sulfate to form a protective layer to achieve secondary modification and avoid contact between particles.

[0057] The protective layer provided by polyvinyl alcohol prevents the barium sulfate particles from colliding and agglomerating with each other, thus ensuring stability.

[0058] Wherein, in step 2 and step 3, the speed of the stirrer is 300-600 rpm, the temperature is 40° C., and the stirring time is 30 minutes.

[0059] When mixing and stirring the barium sulfate, a high shear type agitator can be used as the agitator, and the shear rate is 3000 rpm, so that the barium sulfate particles are evenly dispersed through high-speed shearing.

[0060] Wherein, the liquid solvent is butyl acetate, which is an organic ester solvent and is responsible for adjusting the concentration and viscosity of the composition.

[0061] Organic ester solvents have strong volatility and solubility, can reduce the viscosity of the composite coating, ensure its fluidity, and make the coating smooth and uniform.

[0062] The barium sulfate is used as the main filler, and its specific surface area is 10-20m 2 / g, particle size is 1-5mm.

[0063] By setting requirements on the particle size of barium sulfate, we can avoid the problem of poor leveling caused by overly coarse particles, and also improve transparency and gloss.

[0064] Wherein, in the step 5, the grinding machine parameters in the grinding stage are set as follows: temperature 25° C., rotation speed 1500-2500 rpm, grinding time 30 minutes, and the proportion of grinding media is 60-80% of the volume of the coating.

[0065] If the medium ratio is too high during grinding, the viscosity of the coating will increase, resulting in uneven stirring. If it is too low, the grinding efficiency will be reduced, and the particles will be refined and the dispersion of the particles will be improved through grinding.

[0066] The inorganic chemical composition containing modified barium sulfate can achieve multiple advantages in coatings, including enhancing hiding power and glossiness, improving durability and physical properties, and optimizing construction performance.

[0067] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0068] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An inorganic chemical composition and a preparation method thereof, characterized in that: The composition is prepared from the following raw materials in parts by weight: 40-50 parts of barium sulfate, 10-20 parts of peptide white powder, 15-25 parts of acrylic resin, 1-2 parts of silane coupling agent, 1-2 parts of dispersant, 2-5 parts of plasticizer, 1-3 parts of tackifier, 10-20 parts of liquid solvent and 5-10 parts of talc. The preparation steps of the composition are as follows: Step 1: barium sulfate modification, using a silane coupling agent to modify the surface of barium sulfate; Step 2: Preliminary mixing: mixing and stirring the dispersant and the liquid solvent until they are completely dissolved, and then adding the modified barium sulfate into the solution and mixing; Step 3: Resin mixing: add acrylic resin, titanium dioxide, plasticizer and tackifier in another container in sequence and stir evenly; Step 4: mixing the ingredients, mixing the solution containing barium sulfate in step 2 and the resin solution in step 3, and adding talcum powder to increase fluidity; Step five: grinding: grinding and dispersing the mixed composite coating to make it smooth and delicate.

2. An inorganic chemical composition and a preparation method thereof according to claim 1, characterized in that: The specific steps of barium sulfate modification are: A1, first take out the barium sulfate and silane coupling agent required by the formula, and prepare the silane coupling agent solution and the barium sulfate suspension; A2, gradually add the prepared silane coupling agent solution into the barium sulfate suspension and stir slowly; A3, the stirring time is set to 60 minutes and the temperature is set to between 50-70°C; A4, after the reaction is completed, filter and wash the barium sulfate, remove the excess solvent, and dry it; A5, after drying, the surface modification of barium sulfate is completed.

3. An inorganic chemical composition and a preparation method thereof according to claim 1, characterized in that: The silane coupling agent is methyltriethoxysilane, which can form a chemically bonded layer on the surface of the barium sulfate when modified with barium sulfate, thereby improving the dispersibility of the barium sulfate and the compatibility with the resin.

4. An inorganic chemical composition and a preparation method thereof according to claim 1, characterized in that: The dispersant is polyvinyl alcohol. During the reaction, the polyvinyl alcohol molecules will be fixed on the surface of the barium sulfate to form a protective layer to achieve secondary modification and avoid contact between particles.

5. An inorganic chemical composition and a preparation method thereof according to claim 1, characterized in that: In the step 2 and step 3, the speed of the stirrer is 300-600 rpm, the temperature is 40° C., and the stirring time is 30 minutes.

6. An inorganic chemical composition and a preparation method thereof according to claim 1, characterized in that: The liquid solvent is butyl acetate, which is an organic ester solvent and is responsible for adjusting the concentration and viscosity of the composition.

7. An inorganic chemical composition and a preparation method thereof according to claim 1, characterized in that: The barium sulfate is used as the main filler, and its specific surface area is 10-20m 2 / g, particle size is 1-5mm.

8. An inorganic chemical composition and a preparation method thereof according to claim 1, characterized in that: In the step 5, the grinding machine parameters in the grinding stage are set as follows: temperature 25° C., rotation speed 1500-2500 rpm, grinding time 30 minutes, and the proportion of grinding media is 60-80% of the coating volume.

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