1. Defoamers

Principle

Dimethicone has a low surface tension and is insoluble in water, animal and vegetable oils, and high - boiling mineral oils in foaming systems. It also features good chemical stability and non - toxicity. It can quickly spread on the surface of foam, reducing the local surface tension of the foam film. This causes the foam to break, achieving the purpose of defoaming.

Application Scenarios
In the petrochemical industry, during processes such as crude oil extraction, distillation in oil refining, and catalytic cracking, a large amount of foam is generated. Adding dimethicone defoamer can effectively eliminate the foam, preventing foam overflow that could cause safety hazards and production losses. In the production of coatings and inks, processes like stirring and grinding are prone to generating foam, which affects product quality and production efficiency. Dimethicone can quickly defoam and inhibit foam re - generation. In the papermaking industry, during pulping and paper - making processes, dimethicone can also be used as a defoamer to improve paper quality and production efficiency.

2. Lubricants

Principle

Dimethicone has excellent lubricity and chemical stability. It can form a stable lubricating film on the friction surface, reducing the coefficient of friction and wear. At the same time, it has certain shear - resistance, enabling it to maintain good lubrication performance under harsh conditions such as high loads and high speeds.

Application Scenarios
In the processing of plastics and rubbers, dimethicone can be used as a lubricant to reduce the friction between materials and processing equipment, making it easier for materials to be extruded, injection - molded, etc. This improves production efficiency and product quality. In the transmission parts, bearings, valves, and other components of chemical equipment, dimethicone can effectively lubricate, reducing equipment wear, extending equipment service life, and reducing maintenance costs.

3. Release Agents

Principle
Dimethicone does not adhere to rubber, plastic, metal, and other materials. It can form a uniform isolation film on the mold surface, making it easy for the molded products to be removed from the mold without damaging the product surface. Additionally, it can increase the service life of the mold.

Application Scenarios
In the production of rubber products, such as tires and rubber seals, dimethicone can be used as a release agent, enabling rubber products to be demolded smoothly, improving production efficiency and product qualification rate. In the injection - molding and extrusion - molding processes of plastic products, dimethicone can also play a good demolding role, especially for some plastic products with complex shapes and high - precision requirements.

4. Surfactants 

Principle
Dimethicone can be modified to introduce hydrophilic groups, giving it certain surface activity. It can reduce the surface tension of liquids, improving the spreading and penetration of liquids.

Application Scenarios
In pesticide formulations, dimethicone can be used as a wetting and spreading agent, enabling pesticide droplets to better wet and spread on the surface of plant leaves. This improves the efficacy of pesticides, reduces the amount of pesticides used, and minimizes environmental pollution. In coatings and inks, dimethicone can be used as a leveling agent to reduce the surface tension of coatings and inks, making the coating and ink layers smoother and more even, improving the appearance quality and printing quality.

5. Plasticizers

Principle

Dimethicone can insert between polymer molecular chains, weakening the intermolecular forces, increasing the flexibility and mobility of molecular chains, thus playing a plasticizing role.

Application Scenarios
In some plastic and rubber products, such as polyvinyl chloride (PVC) plastics and silicone rubbers, adding an appropriate amount of dimethicone can reduce the hardness of the materials, improve flexibility, cold - resistance, and processing performance, expanding their application scope.

6. Heat Carriers

Principle

Dimethicone has good thermal stability and thermal conductivity. It can maintain stable physical and chemical properties within a wide temperature range. It can be used as a heat carrier to transfer heat from the heat source to the parts that need to be heated.

Application Scenarios
In some high - temperature reaction processes in chemical production, such as polymerization reactions and esterification reactions, dimethicone can be used as a heat carrier to provide stable heat for the reaction, ensuring the smooth progress of the reaction. In some chemical equipment that requires precise temperature control, dimethicone can also be used as a heat - exchange medium to achieve heat transfer and temperature control.