Soft silica powder and preparation method thereof
A microsilica powder and soft technology, which is applied in the field of microsilica powder, can solve the problems of microsilica powder with high hardness, poor dispersion, and products that cannot achieve performance and effect, and achieve high particle size, difficulty in agglomeration, and excellent dispersion stability. Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0044] A preparation method of a dispersant is as follows: put 2-hydroxy-2-methyl-3-butenoic acid and N,N-diethylaminoethyl acrylate in a molar ratio of 7:3 into a thermometer, stir Add the ethanol of 55wt% of reaction material and the isopropanol of 8.5wt% of reaction material in the flask of device, condenser tube and constant pressure dropping funnel, stir evenly, and heat; when heated to 55 ℃, azobisiso After butyronitrile is placed in ethanol and dissolves, obtain concentration and be the azobisisobutyronitrile solution of 8.5wt%, slowly drop in the above-mentioned flask again, wherein azobisisobutyronitrile is 5.5wt% of reaction mass, continue to heat up to React at 70°C for 3 hours, remove ethanol by rotary evaporation, and add dropwise sodium hydroxide solution with a mass fraction of 15wt% to adjust the pH of the system to 7.2, add dropwise acetone to precipitate precipitation, repeat 3 times, wash with water and absolute ethanol twice respectively, Then it was dried ...
Embodiment 2
[0046] A preparation method of a dispersant, different from Example 1: 2-hydroxy-2-methyl-3-butenoic acid and N,N-diethylaminoethyl acrylate in a molar ratio of 6:4 Place in a flask, add 65wt% ethanol of the reaction material and 10wt% isopropanol of the reaction material, stir evenly, and heat; when heated to 55°C, dissolve azobisisobutyronitrile in ethanol to obtain the concentration 8.5wt% azobisisobutyronitrile solution, slowly drop it into the above-mentioned flask, wherein azobisisobutyronitrile is 6.5wt% of the reaction material, continue to heat up to 70 ° C for 3 hours, and remove ethanol by rotary evaporation , and dropwise adding a sodium hydroxide solution with a mass fraction of 15wt% to adjust the pH of the system to 7.5, dropwise adding acetone to precipitate a precipitate, repeating 3 times, washing with water and absolute ethanol twice respectively, and then drying at 55°C for 20h to obtain Dispersant.
Embodiment 3
[0048] A preparation method of soft silica powder, comprising the following steps:
[0049] S1: In parts by weight, 92 parts of silica powder (purchased from Shanghai Huijing Sub-Nano New Material Co., Ltd., purity > 99%) and 3 parts of aluminum borate powder (purchased from Jinan Zi'an Chemical Co., Ltd., ≥ 99%) was mixed and ground and placed in 120 parts of water, and 1.5 parts of the dispersant in Example 1 were added and mixed uniformly to obtain a mixed slurry;
[0050] S2: Dry the above mixed slurry at 110°C for 3 hours to obtain a mixed material;
[0051] S3: Put the above-mentioned mixed material in a high-temperature furnace to raise the temperature to 1300°C at a rate of 2.5°C / min, keep it warm for 2 hours, cool to room temperature, then put it in a ball mill to pulverize it, and classify it precisely to obtain soft silicon micropowder. Its average particle size is 1.7 μm.
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle size | aaaaa | aaaaa |
| impact strength | aaaaa | aaaaa |
| impact strength | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More