1. Product Basic Properties and Structural Characteristics
IOTA-233 hydrogen-terminated phenyl polysiloxane, registered with CAS number 68952-30-7, is a professionally modified T-type phenyl polysiloxane synthesized via precise hydrogen-termination technology. Its molecular weight ranges steadily from 550 to 3000, creating a balanced combination of chemical reactivity, fluidity and structural stability that adapts to fine processing requirements of various silicone materials. The product appears as a colorless, transparent and viscous liquid with uniform texture, free from impurities, stratification and precipitation, maintaining stable physical properties under normal temperature storage conditions.
The unique T-type molecular framework and phenyl-substituted structure endow the product with excellent compatibility and structural stability. Different from conventional hydrogen-containing silicone oil products, the phenyl groups in its molecular structure optimize the thermal stability and molecular compactness of the material. This structural advantage enables the product to participate in crosslinking reactions stably, helping form dense and stable molecular chains in modified silicone products, and laying a solid foundation for the comprehensive performance improvement of finished silicone materials.
2. Technical Indicators and Performance Characteristics
All physical and chemical indicators of IOTA-233 are standardized and controllable, fully matching industrial batch production standards. The specific gravity is controlled between 1.00 and 1.01, which is close to the density of most mainstream silicone raw materials. It can disperse quickly and evenly in the formula system without long-time stirring and homogenization, effectively simplifying the batching process and improving production efficiency. The refractive index ranges from 1.46 to 1.52 at 20℃, ensuring stable optical performance and retaining the light transmittance of transparent silicone products after application.
The viscosity at 25℃ covers a wide range of 5~5000mm²/s, which can be adjusted according to different processing technologies such as potting, coating, molding and sealing. Its COC flash point is higher than 110℃, showing low volatility and good thermal stability in high-temperature processing environments, which reduces potential safety risks in industrial production. The hydrogen content is stably maintained at 0.35-0.75%, providing moderate and stable active hydrogen components for crosslinking reactions, ensuring smooth and uniform curing of finished products and avoiding quality problems caused by unbalanced reaction rate.
3. Application Scenarios and Industrial Value
This product boasts outstanding substrate compatibility and can be fully blended with methyl silicone oil, liquid silicone rubber, phenyl silicone rubber and phenyl silicone resin without additional compatibilizers. It serves as a core crosslinking agent for addition-cured silicone rubber, phenyl silicone rubber and phenyl silicone resin, optimizing the internal molecular structure of silicone materials through efficient crosslinking reactions.
Silicone products modified by IOTA-233 feature tighter molecular chain bonding and enhanced structural stability, with improved heat resistance, weather resistance and mechanical toughness. It is widely used in electronic component encapsulation, precision instrument sealing, high-temperature anti-corrosion coatings and special industrial elastomer manufacturing. It can adapt to complex working conditions such as alternating high and low temperatures and long-term outdoor use, providing reliable raw material support for the performance upgrading of various high-end silicone products in modern industry.
Phenylsilsesquioxanes hydrogen-terminated IOTA 233-IOTA
