Silicone materials are mainly divided into silicone rubber, silicone oil and secondary processing products, silicone resin and silane coupling agent four categories of products. Due to its excellent characteristics of electrical insulation, radiation resistance, flame retardant, corrosion resistance, high and low temperature resistance, various forms and physiological inertia, silicone products are known as "industrial MONOsodium glutamate". They are widely used in electronic and electrical, building materials, textile, light industry, medical treatment, machinery, transportation, plastic and rubber and other industries. And deep into every field of people's life, become the leader of chemical new materials, its development is just in the ascendant. At present, the global annual production capacity of more than 1.2 million tons, about 5000-10000 kinds of products, the total market sales of about 7 billion US dollars. At present, a wide range of silicone products, varieties of more than more than ten thousand kinds, there are more than 4000 kinds of commonly used, can be roughly divided into raw materials, intermediates, products and products of three categories: silicone monomer: mainly refers to the synthesis of organic silane silicone polymer monomer, such as methyl chloride silane, phenyl chloride silane, vinyl chloride silane and other raw materials. Organosilicon intermediates: Mainly refers to linear or annular oligomers of siloxane, such as hexamethyldisiloxane (MM), octomethylcyclotetrasiloxane (D4), dimethylcyclosiloxane mixture (DMC), etc. Silicone products and products: by intermediates through polymerization reaction, and add various kinds of inorganic filler or modified additives to make silicone products. There are mainly four categories of silicone rubber (high temperature vulcanized silicone rubber and room temperature vulcanized silicone rubber), silicone oil and secondary processing products, silicone resin and silane coupling agent. Silicone rubber is vulcanized and molded by pressing, extrusion and other molding processes to make conductive keys, sealing rings, swimming caps and other final direct supplies.