High-hydrogen silicone oil is an organosilicon compound containing silicon-hydrogen bonds (Si-H). Due to its high reactivity, chemical stability, and film-forming ability, it plays a crucial role in multiple industrial fields. The following are its core application areas and specific uses, summarized based on evidence:
Waterproofing (core application)
Principle: The hydrogen-containing silicone oil uses two nonpolar molecules, silicon-oxygen bonds (Si-O) and methyl groups (-CH₃), to repel moisture. Under the action of a catalyst, the molecules crosslink at low temperature to form a dense film, which is then firmly attached to the substrate surface through chemical bonds, achieving efficient and long-lasting waterproof, moisture-proof, and multifunctional reinforcement effects.
1. Building materials and substrates: Used on surfaces such as glass, ceramics, metals, cement, marble, and stone to form a dense waterproof membrane, improving waterproofing and service life. Specifically designed for decorative materials such as gypsum board and gypsum blocks, significantly reducing water absorption (e.g., <10%, meeting national standards).
2. Fabric Finishing: Treats fibers such as cotton, linen, silk, acrylic, and polyester, imparting water and stain resistance, improving hand feel, drape, and tear strength; when used with hydroxyl silicone oil emulsions, it maintains breathability. Finishing Principle: Chemical Action: On one hand, the Si-H bonds in high-hydrogen silicone oil molecules have high reactivity. Under the action of metal salt catalysts (such as tin and zinc salts), they can undergo condensation reactions with hydroxyl groups (-OH) on the surface of cellulose fibers (cotton, linen, etc.) or amino groups (-NH₂) on protein fibers (silk, wool), forming stable Si-O-C or Si-N-C covalent bonds. This bonding firmly anchors the siloxane backbone to the fiber surface, improving functional durability. On the other hand, the remaining Si-H bonds hydrolyze under the action of moisture and carbon dioxide in the air to generate silanols (Si-OH), which further condense and crosslink to form a three-dimensional network elastic film covering the fiber surface. In terms of physical effects: On the one hand, the methyl groups (-CH₃) in the siloxane segments are oriented on the fiber surface, forming a low surface energy (20-24 mN/m) hydrophobic layer, significantly reducing the surface tension of the fabric and ensuring a water droplet contact angle >90°, thus achieving waterproofing and stain resistance. On the other hand, the highly flexible polysiloxane backbone physically adsorbs and encapsulates the fibers, reducing inter-fiber friction and significantly improving the fabric's softness, smoothness, and drape. The effect is even more pronounced when used in conjunction with methyl hydroxy silicone oils, such as emulsions.
3. Powder materials are used to treat dry powder fire extinguishing agents, mica, clay, etc., to prevent clumping and improve fluidity.
Modified silicone oil synthesis intermediates
As a key raw material, polyether-modified silicone oil, alkyl-modified silicone oil, and epoxy-modified silicone oil are synthesized through hydrosilylation reactions, and used in foam stabilizers, fabric finishing agents, etc.
Cosmetics and Pharmaceuticals
Cosmetics: Used as a hydrophobic agent, lubricant, and moisturizer in oil-based foundations to improve user experience and skin protection. Pharmaceuticals: Used as a drug carrier or sustained-release agent to enhance bioavailability.
Lubrication and demolding
Lubricants: Used in rubber and plastic bearings and gears to reduce wear. Release agents: Promote product ejection during mold processing, improving efficiency, etc.; also used in rubber product manufacturing, paper and glass fiber processing, and ink manufacturing, among other fields.
