Siwin-HL21
Siwin
Siwin-HL21
| Quantity: | |
|---|---|
Siwin-HL21 is a low hydrogen silicone oil, chemically classified as polymethylhydrosiloxane (PMHS). This organosilicon polymer contains reactive Si-H bonds along the siloxane chain, with hydrogen content levels lower than standard high-hydrogen silicone oil variants. Manufactured by Nanjing Siwin New Material Co., Ltd., the product is supplied as a colorless transparent oily liquid.
The Si-H bonds in the molecular structure provide reactive sites for hydrosilylation reactions with vinyl-functional compounds. This reactivity makes low hydrogen silicone oil suitable as a crosslinking agent in addition-curing silicone systems and as a starting material for synthesizing various modified silicone oils through grafting reactions.
Product No. | Siwin-HL21 |
Chemical Name | Low hydrogen silicone oil |
Appearance | Colorless transparent oily liquid |
Kinematical viscosity (25°C), mm²/s | 30-300 (customizable) |
Hydrogen content | 0.1-1.5 (customizable) |
Both viscosity and hydrogen content can be specified according to customer requirements. This customization capability allows industrial clients to select parameters matched to their specific formulation needs and application processes.
Low hydrogen silicone oil serves as a crosslinking agent in addition-curing liquid silicone rubber (LSR) and room-temperature-vulcanizing (RTV) silicone systems. In the presence of a platinum catalyst, the Si-H bonds react with vinyl groups on the base polymer to form crosslinks, converting the liquid silicone into an elastomeric solid. The crosslinking density, which influences final hardness and mechanical properties, can be controlled by adjusting the hydrogen content and addition level of the silicone oil.
Siwin-HL21 functions as a base material for synthesizing various modified silicone oils through hydrosilylation grafting reactions. Polyether-modified silicone oil, long-chain alkyl silicone oil, and epoxy-modified silicone oil are among the derivatives produced using low hydrogen silicone oil as the starting material. Each modification imparts different surface-active properties, lubricity, or compatibility characteristics for targeted industrial applications.
When formulated with appropriate catalysts, low hydrogen silicone oil forms a water-repellent film on the surface of various substrates. Materials treated with this type of waterproofing formulation include textiles, paper, leather, wood, glass, cement, ceramics, and marble. The treatment imparts hydrophobic properties while allowing the substrate to retain its original appearance and breathability characteristics.
Low hydrogen silicone oil is used in LED potting compounds and electronic encapsulation materials. In the production of surface-mount device (SMD) LEDs, silicone-based encapsulants incorporating hydrogen silicone oil provide optical transparency, thermal stability, and mechanical protection for the semiconductor die. The cured silicone material protects the LED from environmental factors such as moisture and mechanical stress.
The product finds use as a lubricant for rubber and plastic components, including bearings and gears. Its low surface tension and thermal stability make it suitable for applications where conventional hydrocarbon lubricants may not perform adequately. It also serves as a processing aid and release agent in various molding and extrusion operations.
Siwin-HL21 is available with customizable specifications to meet specific application requirements. Kinematic viscosity can be specified within the range of 30-300 mm²/s at 25°C, and hydrogen content can be adjusted between 0.1% and 1.5%. This flexibility allows enterprise customers to order material parameters precisely matched to their formulation needs.
Custom orders are coordinated through the technical sales team, which works with procurement and R&D departments to define specifications, confirm feasibility, and establish quality acceptance criteria. Lead times for custom specifications vary based on order volume and parameter complexity.
Siwin-HL21 low hydrogen silicone oil is available in standard packaging sizes for commercial procurement: 210L iron drums containing 200 kg per drum, and 1000L IBC containers holding 1000 kg per container. Alternative packaging arrangements can be discussed for large-volume orders or specialized shipping requirements.
The product is classified and transported as a non-hazardous chemical. It should be stored in a cool, well-ventilated area away from direct sunlight and sources of heat. Containers must be kept sealed to prevent contamination and moisture ingress. The product should be handled following standard industrial chemical safety practices, including the use of appropriate personal protective equipment.
Nanjing Siwin New Material Co., Ltd. produces low hydrogen silicone oil at its manufacturing facility in Hubei Province. The production process follows established polymerization protocols, with process parameters controlled to achieve target viscosity and hydrogen content specifications. Each production batch undergoes quality testing, including viscosity measurement, hydrogen content determination, and visual inspection for clarity and appearance.
The company maintains a quality management system with documented procedures for raw material inspection, in-process monitoring, and finished product testing. Batch records and certificates of analysis are available for industrial clients requiring quality documentation for their incoming material inspection processes.
Technical support staff assist business buyers with formulation development, application troubleshooting, and regulatory compliance questions. The company serves both domestic and international markets with established logistics and export documentation capabilities.
Low hydrogen silicone oil has a hydrogen content typically ranging from 0.1% to 1.5%, while high hydrogen silicone oil generally contains 1.5% to 1.6% or more hydrogen. The difference in Si-H bond concentration affects the crosslinking density achievable in cured systems and the number of grafting sites available for modification reactions. Lower hydrogen content products are used where moderate crosslinking density is desired, while higher hydrogen content products provide more reactive sites per unit mass.
Hydrogen content is typically determined through analytical methods such as gas volumetric measurement, where the hydrogen gas released from a chemical reaction is collected and measured. Other methods include nuclear magnetic resonance (NMR) spectroscopy and wet chemistry techniques. The specific method used may vary by manufacturer and product grade.
When stored in sealed containers under recommended conditions — cool, dry storage away from direct sunlight and heat sources — low hydrogen silicone oil generally maintains its specified properties for 12 months or longer from the date of manufacture. Storage conditions and container integrity are the primary factors influencing shelf life. Users should verify product specifications upon receipt and follow recommended storage practices.
Standard industrial-grade low hydrogen silicone oil is formulated for general industrial applications. Food-contact or medical-grade applications require materials produced under specific regulatory standards and may require additional certifications such as FDA compliance or medical-grade validation. Procurement teams should contact the supplier to discuss specific regulatory requirements and available product grades for regulated applications.
