Liquid silicone is a polymer material with many excellent properties, such as high elasticity, high temperature resistance, and high transparency. There are two common types of liquid silicone in different application fields: condensed liquid silicone and additive liquid silicone. They have different preparation methods, chemical structures, and application fields. This article will provide a detailed introduction to their differences and applications.
Condensed liquid silicone rubber is formed by the polymerization of binary silicate esters. Its preparation method is to react the silicate ester and alcohol under certain conditions to produce a condensation reaction of water and alcohol, forming a condensed liquid silicone rubber. Due to the need to remove the generated water in this reaction, a catalyst needs to be added during the preparation process of this type of liquid silicone rubber.

In contrast, additive liquid silicone is formed by polymerization of monomers such as vinyl siloxane and vinyl polysiloxane. The preparation process of additive liquid silicone does not require the removal of water or the addition of catalysts. Due to the relatively stable silicon oxygen bonds in this type of liquid silicone, the addition of liquid silicone has better thermal and oxidative stability.

In addition to differences in preparation methods and chemical structures, condensed liquid silicone and additive liquid silicone also differ in their application fields. Condensed liquid silicone is mainly used in mold manufacturing, electronic equipment packaging, and sealing gasket production. Additive liquid silicone is more suitable for fields such as electronic packaging, high-temperature sealing, and building waterproofing. In addition, addition liquid silicone rubber can also be used in biomedical fields, such as the production of artificial organ.

In summary, condensed liquid silicone and additive liquid silicone differ in preparation methods, chemical structures, and application fields. Choosing the appropriate liquid silicone material will help improve the performance and quality of the product.