A kind of preparation technology of ultra-low viscosity dimethyl silicone oil

Abstract

The invention discloses a preparation process of ultralow-viscosity dimethyl silicone oil. Low-molecule separation of dimethyl silicone oil is performed in a rectification manner, high-boiling-point components can be reserved to the greatest extent and low-boiling-point components can be separated to the greatest extent under the set rectification conditions, the content of octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane and other molecules in the ultralow-viscosity dimethyl silicone oil with the higher boiling point can be further better controlled, application requirements in certain special high-end application fields such as the personal care industry can be met, besides, ultralow-viscosity linear dimethyl silicone oil with the lower boiling pointer can be captured from rectification fractions, and the one-time yield of a reaction is increased.

Description

Technical field

[0001] The invention relates to a preparation process of ultra-low viscosity dimethyl silicone oil, in particular to a preparation process of ultra-low viscosity dimethyl silicone oil suitable for use in the personal care industry. Background technique

[0002] Dimethicone is a colorless, odorless, transparent liquid with low surface tension, high surface activity, excellent defoaming and anti-foaming properties and good film-forming properties. Dimethicone is hydrophobic and insoluble in water. Dimethicone has good isolation from other substances and has better lubricating properties. Without affecting the air permeability, it has the performance of blocking moisture. Dimethicone has little viscosity change in a wide temperature range. Excellent heat resistance and acid resistance. It has stable chemical properties, high boiling point, low freezing point, and a wide temperature range as a liquid. Dimethicone has good electrical properties, especially in vari...