What causes "oil-falling" and "volatilization"?

Silicone thermal conductive pad is a composite material, which is prepared by mixing two parts: a silicone elastomer that provides high elasticity and a thermally conductive filler that provides high thermal conductivity. Therefore, the main factors are as follows:

1. Insufficient degree of cross-linking of organosilicone, with free unreacted vinyl silicone oil. These silicone oils will migrate to the pad surface when the viscosity decreases at high temperature.

2. There is too much hydrogen-containing silicone oil (including side hydrogen and terminal hydrogen), and the excess reaction causes "oil escaping" and "volatilization".

3. Adding some methyl silicone oil with no active group, or even white oil as a plasticizer, caused oil spills. This problem is often caused by adulterated suppliers.

4, vinyl silicone oil or hydrogen-containing silicone oil itself is too volatile, the main component is D3 ~ D10, such as long-term exposure to high temperatures will cause small molecules to slowly release suspected carcinogens.

5. Residual organic matter in the process of powder processing by powder manufacturers.