CN110951279A - Preparation method of superfine acicular wollastonite modified spherical silicon dioxide composite powder - Google Patents
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Abstract
A preparation method of superfine needle-like wollastonite modified spherical silicon dioxide composite powder is characterized in that high-quality needle-like wollastonite raw ore and quartz stone raw ore are treated to obtain needle-like wollastonite powder and spherical quartz stone powder; adding a composite dispersant into the needle-shaped wollastonite powder and the spherical quartz powder to prepare a wollastonite powder slurry and a quartz powder slurry; preparing the two kinds of slurry into composite slurry, drying, depolymerizing, scattering, and carrying out surface modification by using a composite modifier to obtain the superfine acicular wollastonite modified spherical silicon dioxide composite powder special for the epoxy pouring sealant. According to the invention, the needle-shaped wollastonite powder and the spherical silicon dioxide are subjected to superfine wet grinding and then subjected to slurry compounding, so that the problems of poor dispersibility, low bonding strength, low adhesive strength and the like caused by using one powder in the epoxy pouring sealant are solved, the needle-shaped wollastonite powder and the spherical silicon dioxide are alternately stacked in the pouring sealant, the dispersibility and the suspension of the powder are improved, the pouring sealant is compactly poured, and the heat conductivity of the sealant is improved.
Description
Technical Field
The invention relates to a preparation method of superfine needle-like wollastonite modified spherical silicon dioxide composite powder, belonging to the technical field of wollastonite powder preparation.
Background
The epoxy pouring sealant is an epoxy resin liquid packaging or potting material prepared by taking epoxy resin as a main component, adding various functional additives and fillers and matching with a proper curing agent, is used for bonding, sealing, potting and coating protection of electronic components, and is widely applied to electronic components because of excellent performance of the epoxy resin2O3Fine silicon powder and α -Al2O, because the particle size of the product is small, secondary particles are seriously agglomerated, the crushing and depolymerization effects are poor, the blockage occurs in the extrusion of the pouring sealant, the construction is influenced, and simultaneously, the mechanical property of the sealant is not strong, the stress is concentrated, the silicon micro powder and α -Al are generated2O3The specific gravity is large, and the pouring sealant is easy to precipitate in a liquid state before solidification, so that the overall performance of the sealant is damaged.
Wollastonite is a fibrous, acicular silicate, a triclinic system, generally a sheet, radial or fibrous aggregate, and is white and slightly gray. The glass has luster, pearl luster on a cleavage surface, 4.5-5.0 of hardness and 2.78-2.91 g/cc of density. Because the special crystal morphology and crystal structure determine the property of the wollastonite, the wollastonite has good insulating property, high whiteness, good dielectric property and high heat resistance and weather resistance. Widely applied to raw materials or fillers of paper making, ceramics, cement, rubber, plastics and the like; gas filtration materials and thermal insulation materials; metallurgical fluxing agent and the like. It has the following functions: reducing production cost, improving processing performance (such as adjusting viscosity, rheological property and vulcanization performance), improving dimensional stability and physical properties (such as mechanical property, heat resistance, wear resistance, flame retardance, whiteness and glossiness) and the like.
However, the ultrafine acicular wollastonite is easy to generate spontaneous coagulation and show strong agglomeration characteristics due to small particle strength and high surface energy, and is easy to agglomerate into secondary particles with larger particle size in air or liquid phase medium, so that the excellent physicochemical properties of the ultrafine acicular wollastonite are weakened or lost. In addition, the superfine needle-like wollastonite has a special needle-like fiber structure, and can play roles of reinforcing and improving modulus when being used as a filler in an epoxy potting adhesive, but the superfine needle-like wollastonite is often intertwined with the epoxy resin when being added, so that the reinforcing effect cannot be achieved, the viscosity of a mixture can be increased, the prepared adhesive has poor flowability, and the using effect is seriously influenced.
The performance requirements are difficult to meet by singly using the material as a reinforcing and filling material of the epoxy pouring sealant in consideration of comprehensive production and product performance. In order to reduce the production cost, improve the adhesive property of the epoxy pouring sealant and the mechanical property of the sealant, improve the surface brightness of the product, improve the dispersibility, the thermal conductivity and the insulativity of the product and improve the anti-settling property of the filler, the development of the superfine needle-shaped wollastonite modified spherical silicon dioxide composite powder special for the epoxy pouring sealant is necessary.
Disclosure of Invention
The invention aims to solve the defects of poor dispersity, low bonding strength, low adhesive strength, easy precipitation of filler and high production cost of an epoxy pouring sealant prepared by using a traditional reinforcing agent and a filler, and discloses a preparation method of superfine needle-like wollastonite modified spherical silicon dioxide composite powder.
The technical scheme of the invention is that the preparation method of the superfine needle-like wollastonite modified spherical silicon dioxide composite powder comprises the steps of selecting high-quality needle-like wollastonite raw ores and quartz stone raw ores, and respectively treating the selected high-quality needle-like wollastonite raw ores and quartz stone raw ores to obtain needle-like wollastonite powder and spherical quartz stone powder; respectively adding a composite dispersant into the needle-shaped wollastonite powder and the spherical quartz powder to prepare a wollastonite powder slurry and a quartz powder slurry which are contained to a certain extent; after the slurry is stirred and ground at a high speed and a constant temperature, the two slurries are prepared into a composite slurry with a certain solid content, and a slurry complexing agent is added to carry out slurry liquid phase compounding; drying, depolymerizing, scattering and surface modifying with compound modifier to obtain superfine acicular wollastonite modified spherical silicon dioxide compound powder special for epoxy potting adhesive.
The needle-shaped wollastonite powder is 400 meshes; the spherical quartz stone powder is 400 meshes.
The wollastonite powder slurry is prepared into 65-70% solid slurry by 400-mesh needle-shaped wollastonite powder and water, and a first composite dispersing agent is added.
The first composite dispersing agent is polyethylene glycol fatty acid sodium and sodium dodecyl sulfate, the adding amount of the first composite dispersing agent is 5-8 per mill of the mass of the acicular wollastonite powder, and the mass ratio of the polyethylene glycol fatty acid sodium to the sodium dodecyl sulfate is 1: 4-1: 6.
The quartz stone powder slurry is prepared into slurry with solid content of 55-60% by using 600-mesh spherical quartz powder and water, and a second composite dispersing agent is added.
The second composite dispersing agent is sodium polyacrylate and sodium dodecyl sulfate, the addition amount of the second composite dispersing agent is 4-9 per mill of the mass of the spherical quartz powder, and the ratio of the sodium polyacrylate to the sodium dodecyl sulfate is 1: 3-1: 7.
Pumping the prepared wollastonite powder slurry into a first vertical stirring mill for constant-temperature grinding, adding a grinding medium which is specially-made microspherical pore zirconia with the Mohs hardness of 8 and the diameter of 4-6 mm, stirring for 2 hours, and grinding at 70-75 ℃.
Pumping the prepared quartz stone powder slurry into a second vertical stirring mill for constant-temperature grinding, adding a grinding medium which is specially-made microspherical pore zirconia with the Mohs hardness of 9 and the diameter of 3-5 mm, stirring for 2 hours, and grinding at the temperature of 80-85 ℃.
And pumping the ground wollastonite powder slurry and the ground quartz powder slurry into a third vertical stirring mill, and adding a slurry complexing agent to prepare the slurry with the solid content of 60-65%.
The composite modifier is one or more of sodium stearate, disodium sulfosuccinate, disodium laurylsulfosuccinate and potassium monododecyl phosphate, and the mass ratio of the surfactant to the heavy calcium carbonate is 5-9 per mill.
A preparation method of superfine acicular wollastonite modified spherical silicon dioxide composite powder comprises the following steps:
(1) cleaning raw ore, screening and coarse crushing. And respectively cleaning high-quality needle-like wollastonite raw ore and quartz stone raw ore by using tap water, manually screening, and coarsely crushing by using a jaw crusher to obtain raw ore with the diameter of 4-6 cm.
(2) And (5) finely crushing. And respectively putting the cleaned and coarsely crushed wollastonite raw ore and quartz stone raw ore into a storage bin through an automatic batch feeder for secondary crushing, and obtaining a material with the diameter of 4-8 mm after secondary crushing.
(3) And (4) dry grinding. Conveying the materials subjected to secondary crushing to a 198-mesh ring roller mill by a belt to perform dry grinding, adding a grinding aid at the inlet of the ring roller mill, performing dry grinding on the wollastonite raw material, classifying and collecting to obtain 400-mesh needle-shaped wollastonite powder, and performing dry grinding on quartz raw ore, classifying and collecting to obtain 600-mesh spherical quartz powder.
(4) And (4) preparing slurry. Preparing the obtained 400-mesh needle-shaped wollastonite powder and water into slurry with the solid content of 65-70%, and adding a first composite dispersant in the slurry preparation process to fully and uniformly disperse the slurry; and preparing the obtained 600-mesh quartz powder and water into slurry with the solid content of 55-60%, and adding the composite dispersing agent 2 in the slurry preparation process to fully and uniformly disperse the slurry.
(5) And (5) wet grinding. Pumping the obtained 55-60% solid wollastonite slurry into a first vertical stirring mill of 3600L, stirring for 2 hours, adding special microspherical pore zirconia into the vertical stirring mill as a grinding medium, wherein the Mohs hardness of the grinding medium is 8, and the diameter of the grinding medium is 4-6 mm. And controlling the temperature of the slurry to be 70-75 ℃ in the stirring and grinding process, and fully and efficiently grinding by a wet method to obtain the 4000-mesh wollastonite slurry. Pumping the obtained 65-70% solid content quartz powder slurry into a 3600L second vertical stirring mill, and stirring for 2 hours, wherein the Mohs hardness of a grinding medium is 9, and the diameter is 3-5 mm. And controlling the temperature of the slurry to be 75-80 ℃ in the stirring and grinding process, and fully and efficiently grinding by a wet method to obtain the 6000-mesh silicon dioxide slurry.
(6) And (6) compounding the slurry. Pumping 4000-mesh wollastonite slurry in the first vertical stirring mill and 6000-mesh silicon dioxide slurry in the second vertical stirring mill into 3600L of third vertical stirring mill according to a certain mass ratio to prepare composite slurry with the solid content of 60-65%, adding a slurry complexing agent to change the surface activity of particles in the slurry, and mixing to compound and coat the wollastonite powder and the silicon dioxide particles.
(7) And (5) flash evaporation and drying. Pumping the stirred and compounded composite slurry into a quick flash dryer, and carrying out flash drying by adopting clean hot air.
(8) Depolymerization and scattering. And collecting the dried composite powder, feeding the collected composite powder into a depolymerization beater through a spiral reamer feeder, and destroying the agglomeration of particles generated in the drying process to keep the primary particle size of the particles.
(9) And (4) surface modification. The depolymerized and broken powder enters a surface modifying machine through a screw reamer feeder, and a composite modifying agent with a certain powder mass ratio is added, so that the oil absorption of the powder is reduced, and the compatibility of the powder with resin is improved.
(10) And (6) collecting and packaging. Collecting the surface modified powder by a cloth bag, and packaging the collected powder by an automatic packaging machine to obtain the finished product.
The preparation method has the beneficial effects that the needle-shaped wollastonite powder and the spherical silicon dioxide are adopted for carrying out superfine wet grinding and then carrying out slurry compounding, the obtained composite powder integrates the advantages of the wollastonite powder and the silicon dioxide, the problems of poor dispersibility, low bonding strength, low adhesive strength and easy precipitation of fillers caused by singly using one powder in the epoxy pouring sealant are solved, the needle-shaped wollastonite powder and the spherical silicon dioxide are alternately stacked in the pouring sealant, the dispersibility and the suspension of the powder are improved, the pouring sealant is compactly poured, and the heat conducting property of the sealant is improved.
The hardness of wollastonite and quartz stone is higher, the product is difficult to grind to more than 2500 meshes by a common grinding process, the product can effectively grind powder particles to 4000-6000 meshes by a constant-temperature wet grinding superfine powder processing process, a composite dispersing agent and a specially-made high-hardness grinding medium are added, the average particle size is 1.0-1.5 mu m, and meanwhile, a worker for knowing the aggregation and scattering is adopted in the product production processThe process effectively disperses the powder and keeps the particle size of primary particles. BET specific surface area of 15m or more2(ii) in terms of/g. The larger the specific surface area, the stronger the adhesiveness of the glue, the lower the specific gravity, the larger the volume of the glue made by the same material charge, and the lower the cost. In addition, the lower the specific gravity, the higher the suspensibility of the filler in the pouring sealant, the more difficult the filler is to precipitate before the sealant is cured, the finer the powder particles are, the better the mechanical properties of the product are, and the higher the surface gloss is.
The invention adopts a slurry compounding technology, the surface activity of particles in the slurry is changed by adding a slurry compounding agent into the composite slurry, wollastonite powder and silicon dioxide particles are compounded and coated by stirring, the advantages and the disadvantages of the wollastonite and the silicon dioxide after compounding are complemented, the fluidity and the filler suspension property are obviously improved when the wollastonite and the silicon dioxide are applied to the pouring sealant, meanwhile, the heat conduction and the insulation properties of the electronic pouring sealant are improved due to the excellent heat conduction and the insulation properties of the wollastonite and the silicon dioxide, and in addition, the wollastonite provides a certain flame retardant property for the pouring sealant.
The invention adopts a composite modification process to modify the surface of the powder, and the activation degree of the product is more than 96 percent. The higher the surface activation degree of the powder material is, the lower the oil absorption is, the better the dispersibility and the fluidity are, and the stronger the compatibility with the epoxy resin is.
The invention has the advantages of scientific and reasonable design, simple operation process, high automation degree and easy large-scale production, and can reduce the agglomeration and overlapping of particles, enhance the powder fluidity of the particles and improve the dispersibility of the particles in epoxy resin, thereby improving the comprehensive performance of the epoxy pouring sealant and expanding the application field of the wollastonite powder in the adhesive industry.
Drawings
FIG. 1 is an electron micrograph of acicular wollastonite powder of 400 mesh; FIG. 2 is an electron micrograph of the composite powder;
FIG. 3 is a flow chart of the preparation method of the superfine acicular wollastonite modified spherical silicon dioxide composite powder.
Detailed Description
An embodiment of the present invention is shown in fig. 3.
Example 1:
the embodiment of the invention relates to a preparation method of superfine acicular wollastonite modified spherical silicon dioxide composite powder, which comprises the following steps:
the high-quality needle-shaped wollastonite raw ore and quartz raw ore are respectively self-cleaned, screened, crushed for multiple times, ground by a dry method, classified and collected to obtain 400-mesh needle-shaped wollastonite powder and 600-mesh spherical quartz powder. An electron micrograph of 400 mesh acicular wollastonite powder is shown in FIG. 1.
Preparing the obtained 400-mesh needle-shaped wollastonite powder and water into slurry with the solid content of 65-70%, adding a first composite dispersant of sodium polyethylene glycol fatty acid and sodium dodecyl sulfate in the process of preparing the slurry, wherein the addition amount of the sodium polyethylene glycol fatty acid and the sodium dodecyl sulfate is 6 per mill of the mass of the wollastonite powder, and the ratio of the sodium polyethylene glycol fatty acid to the sodium dodecyl sulfate is 1: 4.
Preparing the obtained 600-mesh quartz powder and water into slurry with the solid content of 55-60%, and adding a second composite dispersant sodium polyacrylate and sodium stearate in an amount of 5 per mill of the mass of the quartz powder in the slurry preparation process, wherein the ratio of the sodium polyacrylate to the sodium dodecyl sulfate is 1: 3.
Pumping 4000-mesh wollastonite slurry obtained in the first vertical stirring mill and 6000-mesh silicon dioxide slurry obtained in the second vertical stirring mill into 3600L of third vertical stirring mill to prepare composite slurry with the solid content of 60-65%, adding slurry complexing agents of sodium lignosulfonate, sodium trifluoromethanesulfonate, 4-aminoazobenzene-4 sulfonic acid and 2-naphthylamine-1-sulfonic acid in a mass ratio of 2:1:1:1, wherein the adding amount of the slurry complexing agents is 3 per thousand of the mass of the powder.
Carrying out flash evaporation drying and depolymerization to carry out surface modification on the scattered powder, adding a composite modifier of sodium stearate, disodium sulfosuccinate, disodium lauryl sulfosuccinate and potassium monododecyl phosphate in a mass ratio of 3:1:1:1, wherein the mass ratio of the composite modifier to the heavy calcium carbonate is 4 per mill. And collecting and automatically packaging the powder subjected to surface modification to obtain a finished product and packaging. An electron micrograph of the composite powder obtained in this example is shown in FIG. 2.
Example 2:
the embodiment provides a preparation method of superfine acicular wollastonite modified spherical silicon dioxide composite powder, which comprises the following steps:
the high-quality needle-shaped wollastonite raw ore and quartz raw ore are respectively self-cleaned, screened, crushed for multiple times, ground by a dry method, classified and collected to obtain 400-mesh needle-shaped wollastonite powder and 600-mesh spherical quartz powder.
Preparing the obtained 400-mesh needle-shaped wollastonite powder and water into slurry with the solid content of 65-70%, adding a first composite dispersant of sodium glycol fatty acid and sodium dodecyl sulfate in the process of preparing the slurry, wherein the addition amount of the sodium glycol fatty acid and the sodium dodecyl sulfate is 7 per mill of the mass of the wollastonite powder, and the ratio of the sodium glycol fatty acid to the sodium dodecyl sulfate is 1: 5.
Preparing the obtained 600-mesh quartz powder and water into slurry with the solid content of 55-60%, and adding a second composite dispersant sodium polyacrylate and sodium stearate in an amount of 7 per mill of the mass of the quartz powder in the slurry preparation process, wherein the ratio of the sodium polyacrylate to the sodium dodecyl sulfate is 1: 5.
Pumping 4000-mesh wollastonite slurry obtained in the first vertical stirring mill and 6000-mesh silicon dioxide slurry obtained in the second vertical stirring mill into 3600L of third vertical stirring mill to prepare composite slurry with the solid content of 60-65%, adding slurry complexing agents of sodium lignosulfonate, sodium trifluoromethanesulfonate, 4-aminoazobenzene-4 sulfonic acid and 2-naphthylamine-1-sulfonic acid in a mass ratio of 2:1:1:1, wherein the adding amount of the slurry complexing agents is 5 per thousand of the mass of the powder.
Carrying out flash evaporation drying and depolymerization to carry out surface modification on the scattered powder, adding a composite modifier of sodium stearate, disodium sulfosuccinate, disodium lauryl sulfosuccinate and potassium monododecyl phosphate in a mass ratio of 3:1:1:1, wherein the mass ratio of the composite modifier to the heavy calcium carbonate is 6 per mill. And collecting and automatically packaging the powder subjected to surface modification to obtain a finished product and packaging.
Example 3:
the embodiment provides a preparation method of superfine acicular wollastonite modified spherical silicon dioxide composite powder, which comprises the following steps:
the high-quality needle-shaped wollastonite raw ore and quartz raw ore are respectively self-cleaned, screened, crushed for multiple times, ground by a dry method, classified and collected to obtain 400-mesh needle-shaped wollastonite powder and 600-mesh spherical quartz powder.
Preparing the obtained 400-mesh needle-shaped wollastonite powder and water into slurry with the solid content of 65-70%, adding a first composite dispersant of sodium polyethylene glycol fatty acid and sodium dodecyl sulfate in the process of preparing the slurry, wherein the addition amount of the sodium polyethylene glycol fatty acid and the sodium dodecyl sulfate is 8 per mill of the mass of the wollastonite powder, and the ratio of the sodium polyethylene glycol fatty acid to the sodium dodecyl sulfate is 1: 6.
Preparing the obtained 600-mesh quartz powder and water into slurry with the solid content of 55-60%, and adding a second composite dispersant sodium polyacrylate and sodium stearate in an amount of 9 per mill of the mass of the quartz powder in the slurry preparation process, wherein the ratio of the sodium polyacrylate to the sodium dodecyl sulfate is 1: 7.
Pumping 4000-mesh wollastonite slurry obtained in the first vertical stirring mill and 6000-mesh silicon dioxide slurry obtained in the second vertical stirring mill into 3600L of third vertical stirring mill to prepare composite slurry with the solid content of 60-65%, adding slurry complexing agents of sodium lignosulfonate, sodium trifluoromethanesulfonate, 4-aminoazobenzene-4 sulfonic acid and 2-naphthylamine-1-sulfonic acid in a mass ratio of 2:1:1:1, wherein the addition amount of the slurry complexing agents is 7 per thousand of the mass of the powder.
Carrying out flash evaporation drying and depolymerization to carry out surface modification on the scattered powder, adding a composite modifier of sodium stearate, disodium sulfosuccinate, disodium lauryl sulfosuccinate and potassium monododecyl phosphate in a mass ratio of 3:1:1:1, wherein the mass ratio of the composite modifier to the heavy calcium carbonate is 8 per mill. And collecting and automatically packaging the powder subjected to surface modification to obtain a finished product and packaging.
The results of the tests on the product lots of this example are shown in the following table.
The sample batches of example 1 are numbered 1 and 2, and the test results are shown in the table.
The lots of example 2 were numbered 3 and 4, and the results are shown in the table.
The lots of example 3 were numbered 5 and 6, and the results are shown in the table.
Claims (9)
1. A preparation method of superfine acicular wollastonite modified spherical silicon dioxide composite powder is characterized in that selected high-quality acicular wollastonite raw ore and quartz stone raw ore are respectively treated to obtain acicular wollastonite powder and spherical quartz stone powder; respectively adding a composite dispersant into the needle-shaped wollastonite powder and the spherical quartz powder to prepare a wollastonite powder slurry and a quartz powder slurry which are contained to a certain extent; after the slurry is stirred and ground at a high speed and a constant temperature, the two slurries are prepared into a composite slurry with a certain solid content, and a slurry complexing agent is added to carry out slurry liquid phase compounding; drying, depolymerizing, scattering and surface modifying with compound modifier to obtain superfine acicular wollastonite modified spherical silicon dioxide compound powder special for epoxy potting adhesive.
2. The method for preparing the superfine acicular wollastonite modified spherical silica composite powder according to claim 1, wherein the acicular wollastonite powder is 400 meshes; the spherical quartz stone powder is 400 meshes.
3. The method for preparing the superfine acicular wollastonite modified spherical silicon dioxide composite powder according to claim 1, wherein the wollastonite powder slurry is prepared into 65-70% solid slurry by 400-mesh acicular wollastonite powder and water, and a first composite dispersant is added;
the first composite dispersing agent is polyethylene glycol fatty acid sodium and sodium dodecyl sulfate, the adding amount of the first composite dispersing agent is 5-8 per mill of the mass of the acicular wollastonite powder, and the mass ratio of the polyethylene glycol fatty acid sodium to the sodium dodecyl sulfate is 1: 4-1: 6.
4. The method for preparing the superfine acicular wollastonite modified spherical silica composite powder according to claim 1, wherein the quartz powder slurry is prepared into 55-60% solid slurry by 600-mesh spherical quartz powder and water, and a second composite dispersant is added;
the second composite dispersing agent is sodium polyacrylate and sodium dodecyl sulfate, the addition amount of the second composite dispersing agent is 4-9 per mill of the mass of the spherical quartz powder, and the ratio of the sodium polyacrylate to the sodium dodecyl sulfate is 1: 3-1: 7.
5. The method for preparing the superfine acicular wollastonite modified spherical silicon dioxide composite powder according to claim 1, wherein the prepared wollastonite powder slurry is ground in a vertical stirring mill at a constant temperature, a grinding medium is specially-made microspherical pore zirconia, the Mohs hardness is 8, the diameter is 4-6 mm, the stirring time is 2 hours, and the grinding temperature is 70-75 ℃.
6. The preparation method of the superfine acicular wollastonite modified spherical silica composite powder according to claim 1, characterized in that the prepared quartz powder slurry is ground in a vertical stirring mill at constant temperature, a grinding medium is specially-made microspherical pore zirconia, the Mohs hardness is 9, the diameter is 3-5 mm, the stirring time is 2h, and the grinding temperature is 80-85 ℃.
7. The preparation method of the superfine acicular wollastonite modified spherical silica composite powder according to claims 5 and 6, characterized in that the composite slurry is prepared by adding a slurry complexing agent into ground wollastonite powder slurry and quartz powder slurry in a vertical stirring mill to obtain 60-65% solid content slurry.
8. The method for preparing the superfine acicular wollastonite modified spherical silica composite powder according to claim 7, wherein the slurry complexing agent is one or more of sodium lignosulfonate, sodium trifluoromethanesulfonate, 4-aminoazobenzene-4 sulfonic acid and 2-naphthylamine-1-sulfonic acid, and the addition amount of the slurry complexing agent is 3-7 per mill of the mass of the powder.
9. The method for preparing the superfine acicular wollastonite modified spherical silica composite powder according to claim 1, wherein the composite modifier is one or more of sodium stearate, disodium sulfosuccinate, disodium lauryl sulfosuccinate and potassium monododecyl phosphate, and the mass ratio of the surfactant to the heavy calcium carbonate is 5-9 ‰.
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| CN115386140A (en) * | 2022-09-01 | 2022-11-25 | 江西广源化工有限责任公司 | Nano flaky kaolin-wollastonite-hydroxy silicone oil ternary composite powder and preparation method and application thereof |
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