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Introduction:
Fumed Silica is produced with the method of gas phase . Its theory is burning the chloride under oxvhydrogen flame and high- temperature vapor phase hydrolysis, and collected finished product after refining process of condensation, separation, deacidification and screening. Fumed silica, commonly known as "fumed white carbon black", is widely used in various industries as additives, catalyst carriers, petrochemicals, decolorizers, matting agents, rubber reinforcing agents, plastic fillers, ink thickeners, metal soft Sexual polishing agent, insulating filler, advanced daily cosmetic filler and spraying material, medicine, environmental protection and other fields. It also provides a new material foundation and technical guarantee for the development of related industrial fields.
Application Features:
1.Thickening and thyrotrophic effect
2.Suspension and emulsification
3.Free-flowing and anti-caking
4.Anti-slipping function
5.Extinction effect
6.Anti-adhesion effect
7.Enhancing reinforcement effect
Application in Industry:
1.Heat preservation and heat insulation materials
2. Adhesives and Sealants
3.Ink,Paints and coatings
4.Silicone Rubber
Heat preservation and heat insulation materials:
Fumed silica has a large number of micro-pores and a high melting point, so it has a good heat insulation effect and is widely used in heat preservation and heat insulation materials. Nano-insulating materials prepared using fumed silica are important varieties of electrodeless thermal insulation materials, and are widely used due to their excellent characteristics. Used in thermal insulation materials, it can exhibit extremely low thermal conductivity and excellent thermal insulation effect.
Adhesives and Sealants
Among adhesives and sealants, fumed silica mainly plays a role in rheology control and improving adhesion. Polyurethane adhesive epoxy adhesive silicone sealant. Utilizing the excellent reinforcement, thickening and thixotropic properties of fumed silica can prevent the precipitation of adhesives and sealants during storage and sag during curing, and improve their tearing strength and bonding strength.
Ink In the offset printing ink for heat-set printing,
the use of hydrophilic fumed silica can speed up the drying speed of the ink and reduce the phenomenon of smudging and blurring of the ink; in the offset printing ink, use the hydrophobic fumed silica. Silica can reduce the water absorption of the ink, eliminate foam, and increase the depth of the ink without affecting its surface gloss; in gravure printing, flexographic printing and screen printing, fumed silica can be used to adjust the viscosity and prevent pigment settling ; Fumed silica can also be used to control the flow of printer inks and control the fluidity of inks to obtain clear printing; it can be used as a dispersant and flow control agent in the toner cartridges of copiers and laser printers.
Paints and coatings
Fumed silica is widely used in wall coatings, and its main function is to prevent the coating from sagging and improve the flatness of the construction surface. Fumed silica is widely used in paints and coatings, mainly as a rheology additive. It can effectively prevent the delamination of pigments and fillers, improve the weather resistance and scratch resistance of the coating, and improve the bonding strength between the coating and the substrate. Adding fumed silica to the wall coating can effectively prevent the coating from sagging, improve the smoothness of the construction surface, and greatly improve the scrubbing resistance and aging time of the exterior wall coating, and the bonding strength of the coating film and the premise It is also greatly improved, the hardness of the coating film is significantly increased, and the surface self-cleaning ability is also improved. 2. Adsorbing fumed silica on the surface of the powder coating can form a movable layer, produce a "ball" effect, prevent the powder coating from absorbing moisture and agglomerate, and improve the fluidity of the powder coating. 3. Fumed silica is mainly used as a rheology control in floor paint to improve the weather resistance and scratch resistance of floor paint and improve the leveling performance of the coating.
Silicone Rubber
The silanol group (Si-OH) on the surface of fumed silica can form a physical or chemical bond with the silicone rubber macromolecules to form a three-dimensional grid structure in which silica and rubber molecules are integrated, thereby achieving reinforcement. Silicone rubber has excellent characteristics of aging resistance, high and low temperature resistance and electrical insulation. The physical properties of silicone rubber reinforced by fumed silica have been greatly improved, and its tensile strength and tear strength have been greatly improved, which can meet the requirements of silicone rubber. The need for non-foaming during post-vulcanization.
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