The difference between gas-phase adhesive and precipitation adhesive is generally due to the addition of different white carbon black. Precipitation adhesive, also known as ordinary adhesive, has good tear resistance and can be used as a silicone sleeve or other products; The anti impact life of precipitation adhesive is relatively long, and it is generally used in button products. Each type of adhesive has its own length. Today, we will introduce the difference between precipitation agent and gas-phase adhesive.

Precipitation adhesive uses precipitated silica, a type of product with complex chemical processes. The production process generally involves using fuel or gas to react quartz sand with soda ash at high temperature to produce industrial water glass. Industrial water glass is prepared into a dilute solution of a certain concentration with water, and then under certain conditions, an acid is added to precipitate silica. After cleaning, filtering, drying, crushing, and producing the product silica. Precipitation method can be divided into acid method, sol-gel method, carbonization method, and many other specific methods, and acid method is mainly used in China. The acid method involves reacting soluble silicates with sulfuric acid (or other acids), stopping the acid addition reaction when the reaction solution reaches a certain pH value, aging, filtering, and repeatedly cleaning with water to remove Na2SO4.
After drying and crushing, the raw material of silicone rubber products is obtained!

Vapor phase silicone (abbreviated as vapor phase adhesive), also known as pure silicone: it has a highly transparent appearance, a tensile strength of 7.8-10.0Mpa, an elongation of 500-1000%, and a tear strength of 29.4-49KN/m. When the vulcanized product is stretched, there will be no whitening phenomenon, and it can be pulled for a long time without turning white. Production involves the use of silicon tetrachloride and silica obtained from air combustion, with a fineness of over 1000 mesh, for use in food grade, medical grade, and other silicone tubes with special requirements.

Regarding silicone rubber, please check the details:
https://www.htvsilicone.com/product-general-purpose-fumed-type-silicone-rubber-for-molding-.html