In the formulation design of high-temperature vulcanized silicone rubber (HTV) and liquid silicone rubber (LSR), the distribution form of the crosslinking points directly affects the hardness, modulus and comprehensive mechanical properties of the vulcanized rubber. The product we have launched, vinyl silicone oil 272, as a branched methyl vinyl polysiloxane with vinyl groups in the middle of the molecular chain, thanks to its flexible adjustable characteristics of molecular weight and vinyl content, as well as its unique value in applications such as increasing the hardness of silicone rubber, modifying organic materials and preparing medium-temperature vulcanized silicone rubber, provides flexible active intermediate materials for high-performance silicone rubber and organic-inorganic hybrid materials.


I. Core Physical and Chemical Properties of the Product


Product vinyl silicone oil 272 is a colorless or light yellow transparent liquid. Its molecular chain is uniformly distributed with reactive vinyl side groups in the middle, rather than being limited to the ends of the molecular chain. This structural design gives it the following key physical and chemical characteristics: The viscosity and vinyl content can be freely configured according to application requirements. The standard viscosity specifications are 250 to 500 square millimeters per second, 1000 to 1500 square millimeters per second, and 2500 to 3000 square millimeters per second, corresponding to vinyl contents of 2% to 3% and 0.5% to 0.8% respectively, and a pH value of 6 to 8.


II. Core Performance Advantages


Product vinyl silicone oil 272, with its side-chain vinyl molecular design, exhibits the following core performance advantages in material synthesis and modification applications:


Molecular weight and vinyl content can be freely configured. Users can customize products with different molecular weights and vinyl contents according to specific application scenarios, achieving a wide range of regulation from low viscosity high activity to high viscosity low activity.


Side-chain vinyl forms a multi-point crosslinking network. Unlike the linear chain extension characteristics of terminal vinyl silicone oil, the side-chain vinyl can form multi-point crosslinks during vulcanization, being a key structural factor for enhancing the hardness and modulus of vulcanized rubber.


It combines the basic performance of methyl silicone oil with reactivity. The product retains the smoothness, softness, luster and temperature and weather resistance of methyl silicone oil, while the side-chain vinyl gives it the ability to participate in addition reactions and free radical reactions.


III. Main Application Areas


Product vinyl silicone oil 272, with its unique side-chain vinyl structure, can play a key role in the following high-end application areas:


1. Hardener and diluent for high-viscosity methyl vinyl silicone rubber. The product can be used as a hardener for high-molecular-weight, high-viscosity 110-2 silicone rubber, introducing side-chain vinyl to increase crosslink density and effectively enhance the hardness and modulus of vulcanized rubber; it can also be used as a pre-vulcanization diluent to improve the processing fluidity of high-viscosity rubber compounds, with a recommended dosage of 10% to 20% of the total formulation.


2. Modifier for organic resins and high-molecular materials. The product contains side-chain vinyl and has better organic compatibility compared to methyl silicone oil, can be used as a modifier for acrylic resins, vinyl acetate resins, etc. By introducing the silicone chain segments into the main chain or side chain of high-molecular materials, it improves the weather resistance, UV aging resistance and surface hydrophobicity of the materials, and the recommended addition amount is 5% to 10%.


3. Preparation of high-temperature vulcanized silicone rubber and silicone gel. The product can be used to prepare high-temperature vulcanized silicone rubber and medium-temperature vulcanized silicone rubber. The side-chain vinyl participates in the crosslink network construction, achieving the regulation of mechanical properties and thermal stability of vulcanized rubber, suitable for silicone rubber products in medical, electronic and automotive fields; it can also be used to prepare silicone gels with specific softness and stress buffering performance.


4. Usage Suggestions and Selection Reference


When used as a diluent, the recommended dosage is 10% to 20% of the total formulation. When used as a modifier, the addition amount is 5% to 10%. When used in silicone rubber-based pastes, the dosage is 50% to 100%. It is recommended to add directly or use high-speed stirring or powerful stirring equipment to ensure uniform dispersion. Low-viscosity, high-vinyl content specifications are suitable for high activity modification and hardening requirements; high-viscosity, low-vinyl content specifications are suitable for diluting the base rubber and adjusting flexibility.


V. Packaging Specifications and Storage Conditions


Product vinyl silicone oil 272 is packaged in 200-kilogram coated iron drums or 50-kilogram polyethylene plastic drums. It should be stored in a dry, ventilated, and cool place at room temperature. It should not be close to fire sources, avoid direct sunlight exposure, and avoid mixing in catalysts, acids, bases, and other impurities. It should be stored and transported as non-hazardous items.


VI. Quality Assurance and Industrial Chain Value


Product vinyl silicone oil 272 has established a strict quality control system during production. Key indicators such as product appearance, viscosity, vinyl content, and pH value are tested throughout the process to ensure consistency and reliability between batches.


As silicone rubber products continue to develop towards higher hardness, higher modulus, and functionalization, the demand for active silicone oil raw materials with both hardening modification and organic modification functions is steadily increasing. Product vinyl silicone oil 272, with its side-chain vinyl structure's multi-point cross-linking hardening effect, flexible customization services with adjustable molecular weight and vinyl content, and good compatibility as an organic material modifier, is becoming an important raw material option in the preparation of high-temperature vulcanized silicone rubber, organic resin modification, and medium-temperature vulcanized silicone rubber, providing strong raw material support for promoting the high-performance and functionalization development of domestic silicone materials.