Fumed Silica for Thickening, Filler, Coating, Printing Inks

• CAS No.: 112945-52-5
• Formula: Sio2
• EINECS: 112945-52-5
• Appearance: Powder
• Usage: Rubber Auxiliary Agents, Plastic Auxiliary Agents, Coating Auxiliary Agents, Textile Auxiliary Agents, Paper Chemicals, Leather Auxiliary Agents, Electronics Chemicals
• Color: White
• Model NO.: Fumed Silica
• Transport Package: 10kgs or 20kgs Per Bag
• Specification: 99%
• Trademark: N/M
• Origin: China
• Production Capacity: 20000 Tons Per Year

Product Description

Fumed Silica For Thickening, Filler, Coating, Printing Inks
 

Fumed Silica is type of white, non-toxic, odourless and amorphous inorganic fine chemistry products which is made of the chlorosilane with the pyrohydrolysis under the oxy-hydrogen flame state. 

 

Fumed SiO2 (CAS number 112945-52-5), also known as pyrogenic silica because it is produced in a flame, consists of microscopic droplets of amorphous silica fused into branched, chainlike, three-dimensional secondary particles which then agglomerate into tertiary particles.   

 

Fumed SiO2 can be divided into hydrophilic type and hydrophobic type in accordance with their different surface treatments.
 

Properties	Unit	Typical Value	Standardization
/	/	200	/
Specific surface area (BET)	m2/g	200±25	GB/T 20020-2005
pH-value in 4% dispersion	m/m %	3.6~4.5	ISO787-9
Loss on drying ( 2h @ 105ºC)	m/m %	≤1.5	ISO787-2
Loss on ignition(2h @ 1000ºC,based on material dried for 2h @ 105ºC)	m/m %	≤2.5	ISO3262-1
Sieve residue (45μm)	m/m %	≤0.05	ISO787-18
Tamped density (based on material dried for 2h @ 105ºC)	g/L	25~60	ISO787-11
Silica content (based on ignited material)	m/m %	≥99.8	ISO3262-20
Carbon content (based on material dried for 2h @ 105ºC)	m/m %	≤0.2	ISO3262-20
ferrum dioxide content	m/m %	≤0.003	ISO3262-20
Corundum  content	m/m %	≤0.05	ISO3262-20
titanium dioxide  content	m/m %	≤0.03	ISO3262-20

Positive Properties:                                         

For Hydrophilic Nanoscale Fumed SiO2 

• Optimum adjustment of rheology during processing
• Reinforcement of silicone elastomers
• Thickening of non-polar liquids
• Free-flow of foodstuffs and industrial powders
• High chemical purity
• Excellent insulation properties, even at high temperatures
• Conversion of liquids to powders, e.g. pharmaceuticals, cosmetics
• Gelification of battery acids
• Rheology control of greases and lubricants

Applicaton:                                                                  

 

Fumed SiO2 serves as a universal thickening agent and an anticaking agent (free-flow agent) in powders. Like silica gel, it serves as a desiccant. It is used incosmetics for its light-diffusing properties. It is used as a light abrasive, in products like toothpaste. Other uses include filler in silicone elastomer and viscosity adjustment in paints, coatings, printing inks, adhesives and unsaturated polyester resins. It is also used in the production of cat litter box filler. 

 

 

Fumed Silica 150: it is mainly used for acidic silicone rubber, RTV silicone rubber (low moisture content) and neutral silicone rubber

 

Fumed Silica 200: it is mainly used for high-temperature vulcanized silicone rubber, organic silicone defoamer, advance printing ink, powder coating, PVC resin, unsaturated polyester resin thickening, thixotropic agent, pharmaceutical powder, tabular preparation, cosmetics etc.

 

Fumed Silica 380: it is mainly used for silicone rubber, silicone grease and sealing materials of capacitance  packaging with high transparency and high tear resistance.