Colorless and transparent high viscous plastic straight chain polymer compound, the main chain is composed of silicon and oxygen atoms, and the side group connected to silicon is methyl group. The molecular weight is between 500,000 and 800,000. With various additives, it can be mixed into a homogeneous rubber compound. Under the action of organic peroxides, it can be vulcanized into various elastic rubber products.

Features:
The vulcanization activity is low, and the high temperature compression set is large. Vulcanizate has excellent electrical insulation, weather resistance, ozone resistance, and physiological inertia, and can be used for a long time at -50 to +200 °C. It is prepared by catalytic polymerization of octamethylcyclotetrasiloxane (containing a small amount of end-capping agent) under the action of a catalyst.

use:
It is used as insulating material, sealing material and shock-proof material, and has been applied in electronic appliances, aviation, machinery and other industrial sectors.

Dimethyl silicone rubber can also be called methyl silicone rubber. Dimethyl silicone rubber is a colorless and transparent elastomer. Dimethyl silicone rubber has low vulcanization activity and large permanent deformation under high temperature compression. It is not suitable for thick products. The product is more difficult to vulcanize, and the inner layer is also prone to foaming. It is used in the range of -60~+250℃. Since methyl vinyl silicone rubber has better performance than dimethyl silicone rubber, now dimethyl silicone rubber has been gradually replaced by methyl vinyl silicone rubber. .

Product parameters:
1. Appearance: colorless and transparent without mechanical impurities
2. Molecular weight: (45-70)×104

Uses: To make high temperature sealing pipe fittings, gaskets, rollers and waterproof, moisture-proof insulation materials, high-efficiency mold release agent. Widely used in electromechanical, aviation, automotive and medical industries.

Features: Anti-aging, shock-proof, insulation, water-increasing and physiological inertness, etc. The mechanical properties of dimethyl silicone rubber can also be increased to a certain extent.

How to make dimethyl silicone rubber:
The preparation of high molecular weight linear dimethyl polysiloxane rubber requires high-purity raw materials. In order to ensure the purity of the raw materials, the industry is usually first to purify the dimethyl dimethyl polysiloxane with a content of more than 99.5%. Chlorosilane is hydrolyzed and condensed under acid catalysis in ethanol-water medium, and the bifunctional siloxane tetramer, namely octamethylcyclotetrasiloxane, is separated, and then the tetracyclic body is made to react under the action of the catalyst. The formation of high molecular linear dimethyl polysiloxane.

Precautions:
Pack in clean, dry, neutral polyethylene film bags and seal in tin pails. Stored in moisture-proof, moisture-proof, prevent direct sunlight to the warehouse, room temperature -40-+50 ℃. Store as non-toxic and non-dangerous materials.