In the process of the continuous development of organic silicon materials towards high-performance and functionalization, the design of reactive end groups has become a key factor determining the performance boundaries of downstream materials. The product vinyl silicone oil 273, as a vinyl-end-capped polydimethylsiloxane, demonstrates significant industrial application value in fields such as high-temperature vulcanized silicone rubber, liquid silicone rubber, and organic-inorganic hybrid materials, providing a crucial reactive intermediate for high-performance silicone rubber and modified materials.


I. Core Physical and Chemical Properties of the Product


Product vinyl silicone oil 273 is a colorless to pale yellow transparent liquid with a CAS number of 68083-19-2. It is a vinyl-end-capped polydimethylsiloxane. This product offers a wide viscosity range from 0.7 to 165,000 square millimeters per second, with a molecular weight ranging from 186 to 155,000 daltons, and an ethylene content ranging from 29% to 0.03% to 0.04% and a density ranging from 0.81 to 0.98.


II. Core Performance Advantages


Product vinyl silicone oil 273 demonstrates the following core performance advantages due to its end-ethylene molecular design:


High reactivity. The ethylene groups at both ends of the molecular chain can undergo efficient silane-hydrogen addition reactions with hydrogen-containing silicone oils, serving as the core driving force for the formation of crosslinking networks; they can also participate in various other chemical reactions, providing a rich chemical toolbox for material design.


Excellent organic compatibility. Compared to ordinary methyl silicone oil, this product has better compatibility with organic materials and is more easily compatible with polyurethanes, acrylics, and other organic materials, serving as an efficient bridge connecting inorganic siloxanes and organic polymers.


Dual functional group structure. The vinyl groups at both ends give it the dual functions of "chain extension" and "crosslinking", allowing for precise control of the crosslink density and mechanical properties of vulcanized rubber by adjusting the molecular weight and ethylene content.


III. Main Application Areas


Product vinyl silicone oil 273 can play a key role in the following high-end application areas:


1. Basic raw material for high-temperature vulcanized silicone rubber (HTV). This product is the core basic raw material for producing HTV silicone rubber, participating in the formation of crosslinking networks, significantly enhancing the strength, hardness, and mechanical properties of silicone rubber, and widely used in the manufacturing of sealing components, insulation parts, and various silicone rubber products, with usage accounting for 50% to 100% of the base rubber.


2. Main material for liquid silicone rubber (LSR). This product is the core component for injection molding liquid silicone rubber, providing excellent flowability and processing performance, meeting the injection molding requirements of complex products such as medical devices, infant products, and precision electronic encapsulation.


3. Plastic, resin, and coating modifiers. This product reacts with various organic materials such as polyurethanes and acrylics, with an addition rate typically ranging from 5% to 10%, and can be formulated into new materials with better weather resistance, aging resistance, UV resistance, and enhanced impact resistance, widely used in the modification and upgrading of paints, coatings, and plastics.


4. Usage Suggestions and Selection Reference


When used as an additive or modifier, the recommended dosage is 5% to 10% of the total formula. When used as base rubber, the dosage is 50% to 100%. Different viscosity specifications are suitable for different scenarios: low viscosity specifications are suitable for high-reactivity modification and liquid silicone rubber preparation; medium-high viscosity specifications are suitable for HTV base rubber and high-strength silicone rubber products; ultra-high viscosity specifications are suitable for applications with special mechanical strength requirements. This product is chemically reactive. During storage and transportation, impurities (especially catalysts) must not be mixed in. When using or combining it, one should pay attention to whether other materials can trigger chemical reactions to prevent degradation.


V. Packaging Specifications and Storage Conditions


The product vinyl silicone oil 273 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


During the production of product vinyl silicone oil 273, a strict quality control system has been established. Key indicators such as product appearance, viscosity, molecular weight, vinyl content, and density are tested throughout the process to ensure consistency and reliability between batches. With a wide range of viscosity specifications and precise control of vinyl content, this product provides flexible raw material options for downstream fields such as silicone rubber, liquid silicone rubber, and polymer modification.


With the continuous growth in demand for reactive intermediates in high-performance silicone rubber, precision molding materials, and functional coatings, product vinyl silicone oil 273, thanks to its terminal vinyl group's high reactivity, excellent compatibility with organic materials, and wide viscosity selection range, is becoming a key bridge connecting inorganic siloxanes and organic polymers. It provides powerful raw material support for promoting the high-performance and functional development of domestic organic silicon materials.