High hydrogen silicone oil is an organic silicon compound containing silicon-hydrogen bonds (Si-H). With its high reactivity, chemical stability and film-forming ability, it plays a key role in many industrial fields. The following are its core application areas and specific uses, which are summarized based on evidence:

Waterproofing (core application)
Principle: Water is repelled through the two non-polar molecules of silicon oxygen bonds (Si-O) and methyl (-CH₃) of hydrogen silicone oil, and cross-linked into a dense film at low temperature under the action of a catalyst, and firmly attached to the surface of the substrate through chemical bonds, achieving efficient and lasting waterproof, moisture-proof and multi-functional enhancement effects.

1. Building materials and substrates
Used on the surfaces of glass, ceramics, metals, cement, marble, stone, etc., to form a dense waterproof film, improve waterproofness and service life.
Specially used for decorative materials such as gypsum boards and gypsum blocks, significantly reducing water absorption (such as <10%, in line with national standards).

2. Fabric finishing:
Treat cotton, linen, silk, acrylic, polyester and other fibers to give them waterproof and antifouling properties, improve hand feel, drape and tear strength; use with hydroxy silicone oil emulsion to maintain breathability.

Finishing principle:

Chemical action: On the one hand, the Si-H bond in the high hydrogen silicone oil molecule has high reactivity. Under the action of metal salt catalysts (such as tin and zinc salts), it can react with the hydroxyl (-OH) on the surface of cellulose fibers (cotton, linen, etc.) or the amino (-NH₂) of protein fibers (silk, wool) to form a stable Si-O-C or Si-N-C covalent bond. This bond firmly anchors the siloxane main chain on the fiber surface, improving functional durability.

On the other hand, the residual Si-H bond is hydrolyzed to form silanol (Si-OH) under the action of moisture and carbon dioxide in the air, which further condenses and cross-links to form a three-dimensional network elastic film covering the fiber surface.

Physical effects: On the one hand, the methyl groups (-CH₃) of the siloxane chain segments are oriented on the fiber surface to form a hydrophobic layer with low surface energy (20-24mN/m), which significantly reduces the surface tension of the fabric and makes the water drop contact angle >90°, achieving waterproof and antifouling.

On the other hand, the polysiloxane main chain is highly flexible, and it wraps the fiber through physical adsorption, reduces the friction between fibers, and significantly improves the softness, smoothness and drape of the fabric.

If used together with methylhydroxy silicone oil such as emulsion, the effect is more prominent.

3. Powder materials
Treat dry powder fire extinguishing agents, mica, clay, etc. to prevent agglomeration and improve fluidity.

Modified silicone oil synthesis intermediate

As a key raw material, it is synthesized into polyether modified silicone oil, alkyl modified silicone oil, epoxy modified silicone oil, etc. through silane addition reaction, and is used as foam stabilizer, fabric finishing agent, etc.

Cosmetics and medicine

Cosmetics: used as hydrophobic agent, lubricant and moisturizer for oily foundation to improve the feeling of use and skin protection.

Medicine: used as drug carrier or sustained release agent to improve bioavailability

Lubrication and demoulding

Lubricant: used for rubber, plastic bearings and gears to reduce wear.

Mold release agent: promotes product release in mold processing and improves efficiency

Etc., and is also used in rubber product production, paper and glass fiber processing, ink manufacturing and other fields.