Hydrogen containing silicone oil is a key product in silicone oil varieties. It is not only the starting material for many modified silicone oils, but also can obtain various modified silicone oils through silicon hydrogen addition reactions, such as polyether modified silicone oil, long-chain alkyl silicone oil, epoxy modified silicone oil, etc.
According to the different hydrogen contents, hydrogen containing silicone oil can be divided into high hydrogen containing silicone oil and low hydrogen containing silicone oil.
1、 What is high hydrogen silicone oil?
Scientific name: Polymethylhydrogensiloxane, is a colorless and transparent liquid.
High hydrogen silicone oil, as a special type of organic silicon compound, has shown wide application prospects in multiple industrial fields due to its unique molecular structure and chemical properties. It is a linear polydimethylsiloxane with high reactivity and stability, and is an important raw material and intermediate for many chemical reactions.
2、 Characteristics of high hydrogen silicone oil products
1. High hydrogen content: ensuring its high efficiency in various chemical reactions;
2. High reactivity: Due to the presence of a large number of Si-H bonds in the molecule, high hydrogen silicone oil has extremely high reactivity and can react with various chemical substances containing active groups such as double bonds and hydroxyl groups;
3. Weather resistance: able to maintain stable performance under various environmental conditions;
4. Waterproof performance: Under the action of metal salt catalyst, high hydrogen silicone oil can form a dense waterproof film on the surface of the substrate, endowing the substrate with excellent moisture-proof, anti mold, and anti rust properties;
5. Viscosity stability: It can form a film smoothly even in low temperature environments;
6. Chemical stability: High hydrogen silicone oil has excellent chemical stability and can maintain stability in various chemical reactions, making it less likely to react with other substances;
7. Thermal stability: High hydrogen silicone oil can remain stable even under high temperature conditions, without decomposition or deterioration;
8. Surface activity: It has the ability to reduce the surface tension of liquids, thus having wetting, emulsifying, dispersing and other effects;
9. Adjustable viscosity: Its viscosity increases with the increase of molecular weight, so its viscosity can be controlled by adjusting the molecular weight;
10. Safety: Colorless, non-toxic, non irritating, safe and reassuring to use;
11. Environmental friendliness: As a type of organic silicon compound, high hydrogen silicone oil has good biocompatibility and environmental friendliness, which meets the requirements of modern industry for environmental protection.

High hydrogen silicone oil
4、 Application of high hydrogen silicone oil
High hydrogen silicone oil is a chemical substance with excellent properties, which has a wide range of applications in multiple fields.
1. Waterproof treatment of building materials and decorative materials: High hydrogen silicone oil can be used as a waterproof agent and applied to the surface of building materials such as glass, ceramics, leather, paper, metal, cement, marble, etc., forming an effective waterproof film to improve the waterproof performance and service life of the material.
2. Textile industry: It can be used as a finishing agent for fabric fibers such as cotton, linen, silk, acrylic, polyester, etc., to improve the waterproof, anti fouling, and durability of the fabric, while also improving its hand feel and drape. When shared with methyl hydroxy silicone oil lotion, it can be waterproof and maintain the air permeability of the fabric, improve the tear strength, friction strength and antifouling property, and improve the hand feel and sewing performance.
3. Water repellent treatment of powder: High hydrogen silicone oil can treat powder materials, such as powder, mica, clay, etc. of dry powder fire extinguishers, to prevent them from clumping during use and maintain their good performance.
4. Plastic additives: improve the processing and mechanical properties of plastics, prevent aging and yellowing of plastics, and extend their service life.
5. Production of rubber products: It can be used as an anti yellowing agent for high-temperature vulcanized silicone rubber to improve the color stability of rubber products. At the same time, it can also serve as a crosslinking agent for addition molded silicone rubber series products, enhancing the crosslinking density and physical properties of rubber materials.
6. Ink manufacturing: In the field of ink manufacturing, high hydrogen silicone oil can be used as a diluent for silicone ink to improve the fluidity and printing effect of the ink.
7. Paper processing: In paper processing, high hydrogen silicone oil can be used as a release agent and crosslinking agent to improve the processing efficiency and quality of paper, and enhance the waterproof performance of paper.
8. Used as lubricant: Suitable for lubricating rubber, plastic bearings, and gears, reducing wear and friction.
9. Cosmetics industry: used as a hydrophobic agent and lubricant in oily foundation make-up to improve the use effect of cosmetics.
10. Important intermediates: synthesis materials and important intermediates for polyether modified silicone oil, alkyl modified silicone oil, etc. provide important raw material support for the preparation of modified silicone oil.

5、 Preparation method of high hydrogen silicone oil
The methylchlorosilane direct hydrolysis equilibrium method can be used. The specific steps are as follows:
Raw material preparation: The main raw materials are methyl (hydrogen) dichlorosilane and trimethylchlorosilane, among which methyl (hydrogen) dichlorosilane is the main raw material, and trimethylchlorosilane is used as a capping agent.
Hydrolysis equilibrium reaction: The main raw material methyl (hydrogen) dichlorosilane is subjected to hydrolysis equilibrium reaction with the capping agent trimethylchlorosilane to obtain hydrolysis products.
Acid removal treatment: Separate and remove the acidic water from the hydrolysis products.
Catalytic equilibrium reaction: Add concentrated sulfuric acid as a catalyst to carry out equilibrium reaction.
Acid separation treatment: Separate and remove sulfuric acid.
Water washing and acid removal: Wash the product with water to remove residual acidic substances.
Low molecular weight removal: The product is treated to remove low molecular weight substances, resulting in the final product of hydrogen containing silicone oil.
It should be noted that although high hydrogen silicone oil has various applications, in actual use, it is necessary to choose the appropriate type and concentration of product according to specific application scenarios and needs to ensure the best application effect.