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Physical and Chemical Properties: Yuanjiang Brand - Fumed Silica具It has small particle size, large specific surface area, high structural integrity, and strong reinforcing performance. The silanol groups (Si-OH) on the surface of silicon dioxide can form physical or chemical bonds with silicone rubber molecules, creating an adsorption layer of silicone rubber molecules on the silicon dioxide surface. This forms a three-dimensional network structure that integrates silicon dioxide particles with rubber molecules, thereby achieving a reinforcing effect. After being reinforced with fumed silica, the strength of silicone rubber can be **increased by up to 40 times**.。
Usage：Ink, silicone rubber, tablets, cosmetics, plastics, coatings, pharmaceuticals, and other fields。
MedicineIt can serve as a thickener, suspending agent, and carrier, and can also be used as a powder and anti-caking agent for pesticides.
Paint and CoatingsIt is an additive that prevents pigment sedimentation and enhances stability. It is commonly used to modify thixotropy and adjust viscosity. In varnishes, it appears colorless and transparent. In many coatings, it improves leveling, prevents skinning, and affects electrostatic spraying results. It can also control the gloss of certain coatings, such as in urethane polishing treatments.
Adhesive:In sealants and adhesives, it is regarded as a thixotropic agent used to control material sedimentation. Additionally, it is also considered a reinforcing material. It has special applications in industrial adhesive methods that employ high-speed production. It enables automation systems to adapt to a wider range of temperature variations.
Polyester resin and gel layer (gel coat):Extensively used in polyester resins, which are employed to produce boats, truck roofs, and other laminates. As a reinforcing agent in layered resins, it prevents resin drainage. In gel coats, this reinforcing effect prevents material sedimentation, enhancing the thickness and appearance of the film layer. In putties and repair polishes, it controls thickening, flow, and thixotropy to meet various requirements.
Rubber and synthetic rubber:*One of the important uses is the synthesis of silicone rubber. After reinforcement, the strength of silicone rubber **can be increased by dozens of times**, and its high-temperature resistance and chemical resistance are also greatly improved, making silicone rubber applicable in a wider range of fields.
Product Technical Specifications
| Technical Indicators | Measurement unit | Various grades and test results | |||
| Technical Index | Measuring Units | Models & Test Results | |||
| YJ-958 | YJ-968 | YJ2# | YJ4# | ||
| BET specific surface area BET | m2/g | 130-180 | 170-230 | 270-330 | 350-410 |
| Specific Surface area | |||||
| PH value suspension | 3.6-4.5 | 3.6-4.5 | 3.6-4.5 | 3.6-4.3 | |
| Ignition loss 1000°C | % | ≤2.5 | ≤2.5 | ≤2.5 | ≤2.0 |
| Loss on Drying 105°C 2h | % | ≤1.5 | ≤1.5 | ≤1.5 | ≤2.5 |
| Bulk Density | g/L | 25-60 | 25-60 | 25-60 | 30-60 |
| Average particle size | 10-40vm | 10-40vm | 10-40vm | 7-40vm | |
| 45μm sieve residue | % | ≤0.05 | ≤0.05 | ≤0.05 | ≤0.05 |
| SiO2 Content | % | ≥99.8 | ≥99.8 | ≥99.8 | ≥99.8 |
| Al₂O₃ Content | % | ≤0.05 | ≤0.05 | ≤0.05 | - |
| TiO2 Content | % | ≤0.03 | ≤0.03 | ≤0.03 | - |
| Fe2O3 Content | % | ≤0.003 | ≤0.003 | ≤0.003 | - |
Packaging:
10 kg/bag, packaged in polypropylene coated woven bags with polyethylene inner bags, or as per customer requirements.
