Views: 208 Author: Site Editor Publish Time: 2023-10-31 Origin: Site
Organosilicon intermediates mainly consist of a series of siloxane products such as dimethyl cyclosiloxane mixed ring (DMC), silicone ether (MM), hexamethylcyclotrisiloxane (D3), octamethylcyclotetrasiloxane (D4), and decamethylcyclopentasiloxane (D5). Below, we will take you to understand the introduction and correlation of these organosilicon monomers in their applications.
D3 is a tricyclic hexamethylsiloxane, a white crystal with a melting point of 75 ℃ and a shrinkage rate of 0.6-0.8%, used for shrinkage treatment of silicone rubber. D3 can be used not only to synthesize general organosilicon polymers, but also to prepare specific organosilicon compounds as various surface treatment agents, coupling agents, crosslinking agents, etc.
D4 is a tetracyclic compound of octamethylsiloxane, a pure substance, colorless, transparent or milky white liquid, flammable, and odorless. It is a compound obtained from the hydrolysis synthesis process of dimethyldichlorosilane and separated and rectified. It is an important intermediate in the organic silicon industry. The main uses include the preparation of organosilicon polymers such as methyl silicone oil, insulation and moisture-proof of radio components, and surface deactivation agents for gas chromatography glass capillary columns.
D5 is a pentacyclic form of decamethylsiloxane, a colorless and odorless organic silicon compound widely used in cosmetics and human care products. It has good compatibility with most alcohols and other cosmetic solvents.
DMC (Dimethylcyclosiloxane) is a mixture of dimethyl cyclosiloxane, which is a mixture of D3, D4, and D5. It is composed of linear and cyclic bodies and can be used to polymerize silicone oil (polysiloxane). It is a colorless and transparent oily liquid, flammable, and has a density range of 0.95-0.97g/cm3.
DMC is the main raw material for producing silicone rubber and silicone oil, and is also widely used in rubber filler treatment and cosmetics. The preparation of silicone rubber, silicone oil, and other polysiloxane products using dimethyl siloxane mixed ring (DMC) can be further processed into various improved silicone rubber and silicone oil with better resistance to high and low temperatures, good insulation performance, weather aging, ozone, and radiation.