Evonik vapor phase silica, Evonik precipitation silica

Applications and market trends of Evonik vapor phase silica and Evonik precipitation silica

1. Overview of silica

Silk black Fumed silica and ultrafine silica gel also include powdered synthetic aluminum silicate and calcium silicate.

Chemical existence mode: White carbon black is a porous substance, and its composition can be represented by SiO2·nH2O. The surface form of nH2O is hydroxyl group. It is soluble in caustic alkali and hydrofluoric acid, but insoluble in water, solvents and acids (except hydrofluoric acid). It is not only resistant to high temperatures, non-flammable, but also tasteless, odorless, and has good electrical insulation.

Silica black is generally divided into precipitation method silica and gas phase method silica according to production method.

Vapor-phase silica is a white flocculent translucent solid colloidal nanoparticle in its daily state. It is non-toxic and has a huge specific surface area. Vapor-phase white carbon black is all nano-silica, with product purity up to 99% and particle size up to 10~20nm, but the preparation process is complex and expensive.

Precipitation silica is divided into traditional precipitation silica and special precipitation silica. The former refers to sulfuric acid, hydrochloric acid, CO2 and water glass as the basic raw materials. The latter refers to silica produced by special methods such as hypergravity technology, sol-gel method, chemical crystal method, secondary crystallization method or reverse micelle microemulsion method.

2. The role of silica

Precipitated silica is mainly used as a reinforcing agent for natural rubber and synthetic rubber, toothpaste friction agent, etc.

Fused silica is mainly used as a reinforcing agent for silicone rubber, coatings and unsaturated resin thickeners. Ultrafine silica gel and aerogel are mainly used as coatings. Matting agent, thickener, plastic film opening agent, etc.

3. White carbon black brand

Brand: Evonik

Model: R974

Product characteristics: Improve fluidity, improve lipophilicity and thixotropy of the system.

Packing specifications: 10 kg/bag

Applications: medicine, cosmetics, toothpaste, adhesives, resin coatings, paints, inks, plastics, etc.

High-end hydrophobic fumed silica

The R in white carbon black R974 means “hydrophobic”. The difference between different models of “R” products lies in their specific surface area and the difference in organic groups on the silica surface. The difference between R974 and R972 is that the former has a higher BET specific surface area. White carbon black R974 is a hydrophobic fumed silica obtained after treatment with D4 (octamethylcyclotetrasiloxane) based on hydrophilic fumed silica with a specific surface area of ​​110±20m2/g. The following is a parameter comparison table of white carbon black R972.

R974 fumed silica (white carbon black) hydrophobic type R974 is mainly used in medicine, cosmetics, toothpaste, adhesives, resin coatings, paints, inks, plastics and other products. Its characteristics are to improve fluidity, be an effective thickener for water-resistant product systems, and a reinforcing agent for RTV silicone rubber. It can be added to paste cosmetics to improve the lipophilicity and thixotropy of the system.

4. White carbon black market

According to data monitored by Business Club, as of August 06, the average price of domestic high-quality rubber-grade silica was 4,875.00 yuan/ton, and the silica market was stable this week. Operation, the supply side is normal, manufacturers are actively shipping, the mainstream price range is 4,500-5,000 yuan/ton, the upstream support is average, the downstream just needs to purchase, the overall operating rate is normal, the negotiation atmosphere is dull, and the price is mainly stable in the short term.

The domestic rubber-grade silica market is generally stable this week. The mainstream price range is 4,500-5,000 yuan/ton. The quotations of upstream hydrochloric acid manufacturers are temporarily stable. The overall market is average, mainly stable. Operation is the main focus, silica mainly has contract orders, the number of new orders is limited, the overall market purchasing atmosphere is dull, mostly negotiation, merchants are cautious in taking goods, shipments are slow, the overall market supply and demand is balanced, shipments are normal, and inventory is average . The price of hydrophilic silica is on the rise. To learn more about the application and market conditions of Evonik vapor phase silica and Evonik precipitation silica, please contact Kain Chemical customer service, so stay tuned.