Hydrophilic Fumed Silica
Product Introduction
Fumed silica, or pyrogenic silica, colloidal silicon dioxide, is amorphous white inorganic powder which has high specific surface area, nano-scale primary particle size and a relatively high (among silica products) concentration of surface silanol groups. The properties of fumed silica can be chemically modified by reaction with these silanol groups.
Commercial available fumed silica can be divided into two groups: hydrophilic fumed silica and hydrophobic fumed silica. it is widely used as an important ingredient in many industries such as silicone rubber, paint and plastics industries.
Main Characteristics
1, good dispersion, good anti-sinking and adsorption.
2, In silicone rubber: high reinforcement, high tear resistance, good abrasion resistance, good transparency.
3, in paint: anti-sagging, anti-settling, improve pigment stability, improve pigment dispersion, improve film adhesion, anti-corrosion, waterproof, prevent bubbling, help flow, enhance rheological control.
4, Applicable to each paint layer (adhesive, coating, ink) to improve pigment stability, improve pigment dispersion, improve film adhesion, anti-corrosion, waterproof, anti-settling, anti-bubbling, especially for silicone rubber reinforcing, adhesive thixotropic agent, anti-settling agent for colouring system.
5, for the liquid system can get thickening, rheology control, suspension, anti-sagging and other roles.
6, For solid system can improve the enhancement, wear-resistant and so on.
7, For powder system can improve the free flow and prevent agglomeration and other effects. It can also be used as high active filler for natural and synthetic rubber, medicine and cosmetics.
Product Specifications
| Product Index | Product model (BH-380) | Product model (BH-300) | Product model (BH-250) | Product model (BH-150) |
| Silica content% | ≥99.8 | ≥99.8 | ≥99.8 | ≥99.8 |
| Specific surface area m²/g | 380±25 | 300±25 | 220±25 | 150±20 |
| loss on drying 105℃% | ≤2.0 | ≤2.0 | ≤1.5 | ≤1.0 |
| PH of suspension（4%） | 3.8-4.5 | 3.8-4.5 | 3.8-4.5 | 3.8-4.5 |
| Standard density g/l | Around 50 | Around 50 | Around 50 | Around 50 |
| Loss on ignition1000℃ % | ≤2.5 | ≤2.5 | ≤2.0 | ≤1.5 |
| Primary particle size nm | 8 | 10 | 12 | 16 |
Product Application
Mainly used in silicone rubber (HTV, RTV), paints, coatings, inks, electronics, papermaking, grease, fibre-optic cable grease, resins, resins, glass fibre reinforced plastic, glass adhesive (sealant), adhesives, defoamers, solubilizers, plastics, ceramics and other industries.
Packaging and Storage
1. Packaged in multiple layer kraft paper
2.10kg bags on pallet
3. Should be stored in the original packaging in dry
4. Protected from volatile substance
