CN110964344A - Modified calcium carbonate - Google Patents
Modified calcium carbonate Download PDFInfo
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- CN110964344A CN110964344A CN201811134528.2A CN201811134528A CN110964344A CN 110964344 A CN110964344 A CN 110964344A CN 201811134528 A CN201811134528 A CN 201811134528A CN 110964344 A CN110964344 A CN 110964344A
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- calcium carbonate
- modified calcium
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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
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/02—Compounds of alkaline earth metals or magnesium
- C09C1/021—Calcium carbonates
- C09C1/022—Treatment with inorganic compounds
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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
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/006—Combinations of treatments provided for in groups C09C3/04 - C09C3/12
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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
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/04—Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
- C09C3/041—Grinding
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/06—Treatment with inorganic compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/08—Treatment with low-molecular-weight non-polymer organic compounds
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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
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/10—Treatment with macromolecular organic compounds
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses modified calcium carbonate, which comprises the following raw materials: calcium carbonate, high-molecular resin, a grinding aid, an aluminate coupling agent, a maleic anhydride grafting compatilizer, acetyl tributyl citrate, tribasic lead sulfate, ammonium citrate, sodium acetate, cinnamic acid, barium sulfate, magnesium aluminum silicate and antimony trioxide. The modified calcium carbonate is prepared by the steps of crushing, grinding, drying, modifying and the like. The product of the invention is oleophylic and hydrophobic after being modified, has good compatibility with plastics and strong heat resistance, and has wide application value and market prospect.
Description
Technical Field
The invention relates to the technical field of powder, in particular to modified calcium carbonate.
Background
Calcium carbonate is widely used in the manufacture of products such as paper making, rubber, paint, coating, building materials and the like, can improve the heat resistance, tear resistance and sound insulation performance of the products, improves the strength, smoothness and the like of the products, and is the most commonly used filler.
Because the surface of calcium carbonate has hydroxyl with stronger hydrophilicity, presents stronger alkalinity, is easy to form aggregates, causes part of the calcium carbonate to be dispersed unevenly in high polymers, has poor direct application effect, and therefore the calcium carbonate generally needs to be modified. For modified calcium carbonate, the direct addition of a modifier has a certain influence on the particle fineness of the calcium carbonate and cannot meet the original fineness requirement. In addition, the performance range of the calcium carbonate endowed by the existing modification process is more traditional, sometimes the obtained modification effect is not ideal, and the compatibility with plastics is poor.
Disclosure of Invention
The invention aims to provide modified calcium carbonate to solve the problems of poor dispersibility, poor compatibility and the like of the existing calcium carbonate.
The technical scheme of the invention is as follows:
the modified calcium carbonate comprises the following raw materials in parts by weight: 350 parts of calcium carbonate 270-doped materials, 50-75 parts of polymer resin, 1.0-1.2 parts of grinding aids, 0.3-0.6 part of aluminate coupling agents, 0.4-0.7 part of maleic anhydride grafting compatilizers, 0.4-0.8 part of acetyl tributyl citrate, 0.2-0.5 part of tribasic lead sulfate, 0.2-0.4 part of ammonium citrate, 0.2-0.4 part of sodium acetate, 0.1-0.2 part of cinnamic acid, 1.5-3.5 parts of barium sulfate, 0.4-0.9 part of magnesium aluminum silicate and 2.0-2.5 parts of antimony trioxide.
Preferably, the grinding aid comprises the following raw materials: potassium lignosulfonate, triethanolamine, zinc stearate and molasses. Further, the weight ratio is as follows: 3:2:2:1.
The invention also provides a preparation method of the modified calcium carbonate, which comprises the following steps:
s1, adding calcium carbonate into a crusher to be crushed to obtain a crushed material;
s2, adding high molecular resin, tribasic lead sulfate, a grinding aid and a grinding medium into the crushed material prepared in the step S1, and grinding to obtain a material A;
s3, placing the material A obtained in the step S2 into a dryer for drying at the drying temperature of 280-350 ℃, and adding an aluminate coupling agent, a maleic anhydride grafted compatilizer, acetyl tributyl citrate, ammonium citrate, sodium acetate, cinnamic acid, barium sulfate, magnesium aluminum silicate and antimony trioxide for modification in the drying process to obtain a material B;
s4, grinding the material B prepared in the step S3 to 3000-3500 meshes to obtain the modified calcium carbonate.
Preferably, in the step S1, the crushing time is 30-40 min.
Preferably, in step S2, the grinding medium is zirconia beads, and the mesh size of the material a is 2000-2500 meshes.
Preferably, in the step S3, the dryer is a hot air spray dryer, and the spray rate is 10-15 m/S.
Preferably, in the step S3, the water content of the material B is less than or equal to 3%. Preferably, in step S4, material B is ground to 3500 mesh.
The beneficial effects of the invention include:
1. the invention takes the zirconia beads as the grinding medium, and is matched with the polymer resin, the tribasic lead sulfate and the grinding aid, so that the dispersibility of the calcium carbonate particles is better, the grinding efficiency is higher, and the particle size is finer.
2. The modifier is added in the hot air jet drying process, so that the uniform coating and the particle size reduction of the calcium carbonate particles are facilitated.
3. The modifier added in the invention is aluminate coupling agent, maleic anhydride grafting compatilizer, acetyl tributyl citrate, ammonium citrate, sodium acetate, cinnamic acid, barium sulfate, magnesium aluminum silicate, antimony trioxide and the like, so that the product of the invention is oleophylic and hydrophobic, has good compatibility with plastics and strong heat resistance, and can effectively improve the processing performance of the products such as plastics and the like as a filler.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
The first embodiment is as follows:
the modified calcium carbonate comprises the following raw materials in parts by weight: 220 parts of calcium carbonate, 45 parts of high polymer resin, 1.0 part of grinding aid, 0.3 part of aluminate coupling agent, 0.4 part of maleic anhydride grafting compatilizer, 0.4 part of acetyl tributyl citrate, 0.2 part of tribasic lead sulfate, 0.2 part of ammonium citrate, 0.2 part of sodium acetate, 0.1 part of cinnamic acid, 1.5 parts of barium sulfate, 0.2 part of magnesium aluminum silicate and 2.0 parts of antimony trioxide.
The grinding aid comprises the following raw materials in parts by weight: potassium lignosulfonate: triethanolamine: zinc stearate: molasses is 3:2:2: 1.
The preparation method of the modified calcium carbonate comprises the following steps:
s1, adding calcium carbonate into a crusher for crushing for 30min to obtain a crushed product;
s2, adding high molecular resin, tribasic lead sulfate, a grinding aid and zirconia beads into the crushed material prepared in the step S1, and grinding to obtain a material A with the mesh number of 2000 meshes;
s3, placing the material A obtained in the step S2 into a hot air jet dryer for drying, wherein the hot air jet speed is 10m/S, the drying temperature is 280 ℃, and adding an aluminate coupling agent, a maleic anhydride grafted compatilizer, acetyl tributyl citrate, ammonium citrate, sodium acetate, cinnamic acid, barium sulfate, magnesium aluminum silicate and antimony trioxide for modification in the drying process to obtain a material B, wherein the water content of the material B is less than or equal to 3%;
s4, grinding the material B prepared in the step S3 to 3000 meshes to obtain the modified calcium carbonate.
Example two:
the modified calcium carbonate comprises the following raw materials in parts by weight: 300 parts of calcium carbonate, 55 parts of polymer resin, 1.2 parts of grinding aid, 0.6 part of aluminate coupling agent, 0.7 part of maleic anhydride grafting compatilizer, 0.8 part of acetyl tributyl citrate, 0.5 part of tribasic lead sulfate, 0.4 part of ammonium citrate, 0.4 part of sodium acetate, 0.2 part of cinnamic acid, 3.5 parts of barium sulfate, 0.7 part of magnesium aluminum silicate and 2.5 parts of antimony trioxide.
The grinding aid comprises the following raw materials in parts by weight: potassium lignosulfonate: triethanolamine: zinc stearate: molasses is 3:2:2: 1.
The preparation method of the modified calcium carbonate comprises the following steps:
s1, adding calcium carbonate into a crusher to be crushed for 40min to obtain a crushed product;
s2, adding high molecular resin, tribasic lead sulfate, a grinding aid and zirconia beads into the crushed material prepared in the step S1, and grinding to obtain a material A with 2500 meshes;
s3, placing the material A obtained in the step S2 into a hot air jet dryer for drying, wherein the hot air jet speed is 15m/S, the drying temperature is 350 ℃, and adding an aluminate coupling agent, a maleic anhydride graft compatilizer, acetyl tributyl citrate, ammonium citrate, sodium acetate, cinnamic acid, barium sulfate, magnesium aluminum silicate and antimony trioxide for modification in the drying process to obtain a material B, wherein the water content of the material B is less than or equal to 3%;
s4, grinding the material B prepared in the step S3 to 3300 meshes to obtain the modified calcium carbonate.
Example three:
the modified calcium carbonate comprises the following raw materials in parts by weight: 260 parts of calcium carbonate, 50 parts of high polymer resin, 1.2 parts of grinding aid, 0.6 part of aluminate coupling agent, 0.4 part of maleic anhydride grafting compatilizer, 0.4 part of acetyl tributyl citrate, 0.5 part of tribasic lead sulfate, 0.2 part of ammonium citrate, 0.2 part of sodium acetate, 0.1 part of cinnamic acid, 2 parts of barium sulfate, 0.5 part of magnesium aluminum silicate and 2.5 parts of antimony trioxide.
The grinding aid comprises the following raw materials in parts by weight: potassium lignosulfonate: triethanolamine: zinc stearate: molasses is 3:2:2: 1.
The preparation method of the modified calcium carbonate comprises the following steps:
s1, adding calcium carbonate into a crusher to be crushed for 33min to obtain a crushed product;
s2, adding high molecular resin, tribasic lead sulfate, a grinding aid and zirconia beads into the crushed material prepared in the step S1, and grinding to obtain a material A with the mesh number of 2300 meshes;
s3, placing the material A obtained in the step S2 into a hot air jet dryer for drying, wherein the hot air jet speed is 15m/S, the drying temperature is 300 ℃, and adding an aluminate coupling agent, a maleic anhydride grafted compatilizer, acetyl tributyl citrate, ammonium citrate, sodium acetate, cinnamic acid, barium sulfate, magnesium aluminum silicate and antimony trioxide for modification in the drying process to obtain a material B, wherein the water content of the material B is less than or equal to 3%;
s4, grinding the material B prepared in the step S3 to 3500 meshes to obtain the modified calcium carbonate.
Comparing the performances of the modified calcium carbonate and the unmodified calcium carbonate produced in the embodiments 1 to 3 of the invention, the obtained modified calcium carbonate has the advantages that the sedimentation volume is reduced by 64.5 to 67.2 percent compared with the sedimentation volume of the unmodified calcium carbonate, the oil absorption value is reduced by 49.2 to 53.7 percent, and the bulk density is reduced by 26.2 to 27.5 percent, which shows that the modified calcium carbonate has small fineness, good compatibility with plastics and good dispersion performance.
The foregoing is a more detailed description of the invention in connection with specific/preferred embodiments and is not intended to limit the practice of the invention to those descriptions. It will be apparent to those skilled in the art that various substitutions and modifications can be made to the described embodiments without departing from the spirit of the invention, and such substitutions and modifications are to be considered as within the scope of the invention.
Claims (10)
1. The modified calcium carbonate is characterized by comprising the following raw materials in parts by weight: 350 parts of calcium carbonate 270-doped materials, 50-75 parts of polymer resin, 1.0-1.2 parts of grinding aids, 0.3-0.6 part of aluminate coupling agents, 0.4-0.7 part of maleic anhydride grafting compatilizers, 0.4-0.8 part of acetyl tributyl citrate, 0.2-0.5 part of tribasic lead sulfate, 0.2-0.4 part of ammonium citrate, 0.2-0.4 part of sodium acetate, 0.1-0.2 part of cinnamic acid, 1.5-3.5 parts of barium sulfate, 0.4-0.9 part of magnesium aluminum silicate and 2.0-2.5 parts of antimony trioxide.
2. The modified calcium carbonate of claim 1, wherein the grinding aid comprises the following raw materials: potassium lignosulfonate, triethanolamine, zinc stearate and molasses.
3. Modified calcium carbonate according to claim 2, characterized in that the proportions by weight of potassium lignosulfonate, triethanolamine, zinc stearate and molasses are: 3:2:2:1.
4. Modified calcium carbonate according to any one of claims 1 to 3, characterized in that the process for its preparation comprises the following steps:
s1, adding calcium carbonate into a crusher to be crushed to obtain a crushed material;
s2, adding high molecular resin, tribasic lead sulfate, a grinding aid and a grinding medium into the crushed material prepared in the step S1, and grinding to obtain a material A;
s3, placing the material A obtained in the step S2 into a dryer for drying at the drying temperature of 280-350 ℃, and adding an aluminate coupling agent, a maleic anhydride grafted compatilizer, acetyl tributyl citrate, ammonium citrate, sodium acetate, cinnamic acid, barium sulfate, magnesium aluminum silicate and antimony trioxide for modification in the drying process to obtain a material B;
s4, grinding the material B prepared in the step S3 to 3000-3500 meshes to obtain the modified calcium carbonate.
5. Modified calcium carbonate according to claim 4, characterized in that in step S1 of the preparation process the crushing time is 30-40 min.
6. The modified calcium carbonate according to claim 4, wherein in step S2, the mesh size of material A is 2000-2500 mesh.
7. Modified calcium carbonate according to claim 4, characterized in that in step S2 of the preparation process the grinding media are zirconia beads.
8. The modified calcium carbonate according to claim 4, wherein in step S3, the dryer is a hot air spray dryer, and the spray rate is 10 to 15 m/S.
9. The modified calcium carbonate according to claim 4, wherein in step S3, the water content of material B is less than or equal to 3%.
10. Modified calcium carbonate according to claim 4, characterized in that in step S4 of the preparation process, material B is ground to 3500 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811134528.2A CN110964344A (en) | 2018-09-28 | 2018-09-28 | Modified calcium carbonate |
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| CN201811134528.2A CN110964344A (en) | 2018-09-28 | 2018-09-28 | Modified calcium carbonate |
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| CN110964344A true CN110964344A (en) | 2020-04-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113072763A (en) * | 2021-04-23 | 2021-07-06 | 江西恒东管业有限公司 | Spiral winding Krah pipe and preparation method thereof |
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2018
- 2018-09-28 CN CN201811134528.2A patent/CN110964344A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113072763A (en) * | 2021-04-23 | 2021-07-06 | 江西恒东管业有限公司 | Spiral winding Krah pipe and preparation method thereof |
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