How to choose the rubber compound? What is the difference between gas phase mixed rubber and precipitation mixed rubber?

What is rubber compound?
Mixed silicone rubber is based on polyorganosiloxane (commonly known as raw rubber), a linear high polymer containing methyl or vinyl groups, and is formulated with reinforcing fillers, extender fillers and additives that impart various properties. The finished base compound.
The main raw material is methyl or vinyl raw rubber, adding silica, bridging agent, structure control agent, coupling agent and other materials, and mixed by high-temperature internal mixer.
Mixed rubber is divided into: gas phase mixed rubber and precipitation mixed rubber
Their difference is:
Vapor-phase silica gel has better tear resistance and is suitable for: products such as sleeves, pressure cooker rings, silica gel wires, etc.;
Precipitation silica gel has a better shock resistance life, and is suitable for: remote control buttons, mobile phone buttons, foot pads, etc.

Properties and benefits of rubber compounds
1. Provide 30-80 Shore A hardness
2. Easy to color
3. Good mold release, suitable for compression molding processing
4. Good transparency
5. Catalyzed by peroxide and platinum
6. Can be in contact with food

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