1. Silicone monomer
Although there are many varieties of silicone, but its initial production raw materials are limited to a few few kinds of silicone monomer, which accounts for the absolute amount of dimethyl dichlorosilane, followed by phenyl chlorosilane. In addition, trimethyl chlorosilane, ethyl and propyl chlorosilane, vinyl chlorosilane and so on, is also an indispensable raw material for the production of some varieties. The raw materials for preparing silicone oil, silicone rubber, silicone resin and silane coupling agent are all kinds of silicone monomers. Thousands of silicone products can be produced from several basic monomers. Silicone monomers mainly include: methyl chlorosilane (referred to as methyl monomer), phenyl chlorosilane (referred to as phenyl monomer), methyl vinyl chlorosilane, ethyl trichlorosilane, propyl trichlorosilane, vinyl trichlorosilane, γ -chloropropyl trichlorosilane and fluorine silicone monomer. Among them, methyl chlorosilane is the most important, its dosage accounts for more than 90% of the total monomer, followed by phenyl chlorosilane.
Organochlorine silanes (methyl, phenyl, vinyl) are the basis of the whole silicone industry, and methyl chlorosilane is the backbone of the silicone industry. Most of the organosilicon polymers are made of dimethyldichlorosilane as the raw material of polydimethylsiloxane as the base polymer, and then introduce other groups such as phenyl, vinyl, chlorophenyl, fluoroalkyl and so on to meet special needs. Methyl chlorosilane production process is long, technical difficulty, is a technology-intensive, capital-intensive industry, so foreign major companies are large-scale construction of basic factories, and then processed products are distributed according to the use, market situation.
The key to the development of any polymer material is the development of monomer technology. The silicone industry is characterized by concentrated monomer production and dispersed product processing. Therefore, monomer production plays an important role in silicone industry, and the production level of monomer directly reflects the development level of silicone industry.
2, organic silicon intermediate
Silicone monomer through hydrolysis (or alcoholysis) and pyrolysis to produce a variety of different silicone intermediates, silicone intermediates is the synthesis of silicone rubber, silicone oil, silicone resin direct raw materials, Including hexamethyldisiloxane (MM), hexamethylcyclotrisiloxane (D3), octomethylcyclotetrisiloxane (D4), dimethylcyclosiloxane mixture (DMC) and other linear or cyclic siloxane series oligomers.