Characteristics and Applications of Mold Silicone

The structure of mold silicone is generally composed of five components: base adhesive, crosslinking agent, catalyst, filler, and additive. In theory, as long as there are the first three components, mold silicone can be made, but to obtain a certain strength, "filler" is generally necessary, and "filler" depends on the situation. Usually, the base adhesive, crosslinking agent, and filler are made into one component, while the catalyst is used as a separate component. The ratio of catalyst component to main rubber component is generally between 1% -3%, and the reaction rate of the gel reaction can be adjusted by adjusting the catalyst ratio.

The characteristics of mold silicone:

① Mold silicone rubber should have good operational performance.

② Silicone has better flowability and low viscosity, making it easy to operate

③The smaller the shrinkage rate of silicone rubber, the better.

④ Silicone rubber has better tensile strength.

⑤ The silicone mold made should not deform.

⑥ The hardness of silicone rubber should be suitable for product use.

⑦ High temperature resistance, multiple mold turns, longer service life, better, acid, alkali, and aging resistance.

Mold silicone is generally composed of five components: base rubber, cross-linking agent, catalyst, filler, and additive. Usually, base rubber, cross-linking agent, and filler are made into one component, while catalyst is a separate component. Therefore, mold silicone is also known as dual component vulcanized silicone or RTV-2 room temperature solidified silicone. Its vulcanization is carried out at room temperature, and an appropriate amount (1-5%) of catalyst (curing agent) is added to the main rubber component to produce a crosslinking reaction, forming a flexible and elastic colloid.