Application of AEROSIL R8200 in silicone rubber industry

Release Time:


01Current  main product applications

AEROSIL R8200 products are currently widely used in liquid silicone rubber LSR and RTV anti-fouling flashover coatings. As fillers, different proportions are added according to specific application requirements.

  • RTV system products

    Mainly used in anti-fouling flashover coatings, it has anti-icing effect. Due to the special modification process of R8200, it can maintain the thixotropy of the coating at a higher addition amount. It is the most ideal reinforcing and thickening thixotropy for anti-fouling flashover coatings. variable filler;

  • LSR system products

    Mainly used in precision medical products with high transparency, high fluidity, and complex shapes for infant products. R8200 can meet the filler requirements of various LSR products with high reinforcement, high addition volume, and high fluidity.

02  Product application impact and pictures
  • Influence

Highly reinforcing, thickening and thixotropic, transparent, high addition amount

Insulators after spraying/impregnating anti-fouling flashover coating


LSR products


3  Advantages of liquid injection molding glue compared with traditional hot vulcanization HTV

Traditionally, silicone rubber is divided into room temperature vulcanization and high temperature vulcanization. High-temperature vulcanized silicone rubber can be divided into platinum-catalyzed liquid silicone rubber and peroxide high-temperature solid rubber according to the vulcanization method. The molding modes are injection molding and molding and calendering.


Liquid injection molding glue theoretically produces no by-products and is generally used in high-strength products with light weight and high output: baby pacifiers, protective covers, TV anode caps, automotive machinery rubber, electronic and electrical medical care, copier rubber rollers, and sealing rings.


The advantages are obviously low viscosity, pumping, automatic molding, fast vulcanization speed, low molding pressure, high precision of the grinding tool, and cost saving. R8200 meets customer requirements with its excellent stability and product quality.


04Q  &A
Q:  What are the specific differences between R8200 and R812S?

R8200 and R812S modified groups are both hexamethyldisilazane.


R812S is treated with hydrophilic silicone with a ratio of 300, and R8200 is treated with hydrophilic silicone with a ratio of 200. Therefore, the transparency of R812S will be better, but R812S has a greater impact on the increase in system viscosity.


R8200 has undergone a special treatment process and has a lower specificity than R812S. It has a lower impact on the increase in system viscosity, so the transparency will be worse. However, it has less impact on LSR viscosity and the addition amount is high, resulting in better reinforcement and flow properties. R812S.


Q:  How to choose hydrophobic fumed silica in LSR?
  1. The product does not have high requirements for thixotropy, strength, and transparency. You can choose between R972/R974.

  2. The product has certain requirements for transparency and reinforcement, but has lower requirements for thixotropy. R106 can be selected.

  3. The product has high requirements for reinforcement and viscosity, and has no special requirements for transparency. R8200 can be selected.

  4. The product has certain requirements for transparency, reinforcement and thixotropy. R812S can be selected.