| Customization: | Available |
|---|---|
| CAS No.: | 112926-00-8 (7631-86-9) |
| Formula: | Sio2 |
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China factory supply bulk price Silicon dioxide Sio2 Fumed Silicon Dioxide for silicone rubber, paint and plastics industries
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.
We can manufactures both hydrophilic fumed silica and hydrophobic fumed silica.
Commercial available fumed silica can be divided into two groups: hydrophilic fumed silica and hydrophobic fumed silica.
Because of the above-mentioned features, it is widely used as an important ingredient in many industries such as silicone rubber, paint and plastics industries.Properties
Properties
Reinforcing filler in elastomers
Rheology control and thixotropic agent
Anti-settling,anti-sagging and thickening agent
Free flow aid and anti-caking aid for powders
High Transparency
Product Analysis
Physical & Chemical Data
| Properties | Unit | Typical Value | Testing Standard |
| Specific Surface Area(BET) | m2/g | 200±20 | GB/T 20020 |
| pH value in 4% dispersion | - | 3.9~4.5 | GB/T 20020 |
| Loss on drying(2 hours at 105ºC) | % | ≤2.0 | GB/T 20020 |
| Loss on ignition(2 hours at 1000ºC based on material dried for 2 hours at 105ºC) | % | ≤2.0 | GB/T 20020 |
| Sieve Residue(45μm) | mg/kg | ≤250 | GB/T 20020 |
| Silica Content(Based on ignited material) | % | ≥99.8 | GB/T 20020 |
| Tamped Density(Based on material dried at 105ºC for 2 hours) | g/dm³ | 40~60 | GB/T 20020 |
01
Main Functions of Fumed Silica
Reinforcement
Improve physical strength, tensile strength & tearing resistance
02 Thickening
Increase viscosity in liquid system products
03 Thixotropic Agent
Optimum rheology control performance & thixotropic performance in liquid system products
04 Anti-settling Agent
Good suspending agent in liquid system products due to its sag & settling resistance
05 Anti-caking Agent
Improve free flowing performance of powders, avoid clumped issues
APPLICATIONS
Paint & Coatings
Prevent sedimentation and delamination of pigments, improve the weathering and scratch resistance of coatings, and improve the bonding strength between coatings and substrates.
Resin
Improve its thixotropic features, enables good tensile strength, bending resistance, water resistance, heat resistance,flowing ability. in putty, fumed silica shows great anti-settling thixotropic performance.
In poly-putty base, used as thickening agent & anti-settling agent.
Silicone Rubber
Fumed silica is perfect reinforce agent for silicone rubber. Adding fumed silica, its tensile strength and tear resistance will be greatly improved.
Adhesives & Sealants
Fumed silica has good properties in thixotropy, viscosity & sag resistance
Plastics
Fumed silica improves physical strength of plastics; makes the film easy to open, prevents agglomeration & sagging, helps in flowing, thickening and thixotropic performance.
Construction Materials
Improve performance in thickening, thixotropic ability, flowing ability, reinforcement, scratch-resistance and anti-cracking ability.
Fertilizer
In powder fertilizer, fumed silica adsorbs moisture as anti-caking agent; In fluid fertilizer, as suspending agent.
Cosmestics
Stable three dimensional net structure of fumed silica avoids pigment settling, and excellent dispersion properties ensures uniform distribution of color; Fumed silica has good UV-reflect performance, it's widely used in sunscreen cream.
Thermal Insulation Material
The heat conductivity of fumed silica is 0.022-0.028W/m, enables good thermal insulation.
Pharmaceutical
When added into pharmaceuticals, fumed silica acts as anticaking agent, drug carrier and excipient to prolong drug effect.
Food
In food powders, fumed silica used as dispersing agent, flowing agent, anti-caking agent & desiccant.
Packaging :
10kg/bag, 1 Pallet=total 20bags , net weight 200kg
1.What kind of payment term do you support ?
T/T 30% in advance, 70% before delivery,we will take and show you every process details.
2.What's your terms of delivery?
EXW, FOB, CIF etc
3.How long will your production take ?
Normally 5-7days finish production, then delivery.
4.if u support to sample test?
Sure, we would love to offer you free sample for testing. You only need to pay the shipping fee ok.
5.How to choose the most suitable products?
Based on your industry, also your requirements, we will recommend ones for you.
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