The preparation method of fluosilane liquid glue includes: the raw material mixture is dehydrated and then added with vinyl end sealing agent and amine glue catalyst for ring-opening polymerization; The amine gum catalyst is then pyrolysis at a temperature to terminate the ring-opening polymerization reaction, wherein the raw material mixture is a mixture of fluorinated monomer and methyl ring siloxane, or a mixture of fluorinated monomer, methyl ring siloxane and vinyl methyl ring siloxane. The preparation method is easier to control the molecular weight of the liquid glue, and the fluorosilicone liquid glue with the viscosity in the range of 10--1000Pa. S can meet the requirements of injection molding process. The catalyst used in the preparation process can be cracked directly through high temperature, the process is simple and the yield is high. The fluorosilicone rubber obtained by adding and curing the fluorosilicone liquid glue provided by the invention has excellent physical properties and can be applied to the manufacture and production of seals and gaskets and other materials in airplanes and automobiles. The main chain of fluorosilicone rubber is connected by silicon atom and oxygen atom alternately, and the side chain contains trifluoropropyl and methyl group. It has excellent high and low temperature resistance, weather resistance, oil resistance and solvent resistance.


The forming fluorosilicone rubber generally takes vinyl fluorosilicone oil as the base rubber carrier, contains hydrofluorosilicone oil as the crosslinking agent, the gas phase silica as the filler, and is vulcanized into fluorosilicone elastomer in the presence of platinum catalyst. It can be used as bonding, sealing, posing, coating protection material, and can be used in electronics, automotive, aerospace and other fields. Because its base glue is liquid glue, viscidity is small, easy to automatic production; The addition curing conditions are controllable, and can be cured at room temperature, medium temperature and hot, and no small molecules are released.


Hot vulcanized fluorosilicone rubber is usually under the action of peroxide, so that the vinyl of fluorosilicone rubber and methyl hydrogen on the interaction and vulcanization, commonly used vulcanizing agent including 2, 4-dichloroperoxy benzoyl (double difour) or 2, 5-dimethyl -2, 5-bis (tert-butyl peroxy) hexane (double 25). And the addition molding fluorosilicone rubber needs Si - H active group and vinyl in the base rubber addition reaction and vulcanization. Common hydrogen-containing silicone oil has poor compatibility with fluorosilicone base gum, so it is necessary to use hydrofluorine-containing silicone oil as crosslinking agent to improve its compatibility with the base gum.