In the process of the continuous development of organic silicon materials towards high-performance and functionalization, the active intermediates with controllable molecular weight and high reactivity are becoming the key bridge connecting the basic raw materials and high-end applications. The product 218 of low-viscosity vinyl silicone oil launched by our company, as a small molecule linear polydimethylsiloxane with vinyl groups at both ends, demonstrates significant industrial application value in numerous high-end application fields such as high-temperature vulcanized silicone rubber base materials, pre-polymer of rubber, room-temperature or medium-temperature curing liquid silicone rubber, and modification of polymer materials. It provides efficient and flexible active intermediates for the organic silicon and polymer materials industry.


I. Core Physical and Chemical Properties and Structural Characteristics


Product 218 of low-viscosity vinyl silicone oil is a colorless transparent liquid with a viscosity of ten to twenty millipascal-seconds at 20 degrees Celsius, a flash point of no less than 61 degrees Celsius, and a volatile content of no more than 0.1% at 105 degrees Celsius for two hours. This product is a small molecule linear polydimethylsiloxane with vinyl groups at both ends, belonging to low polycondensation silicone oil. It has a low molecular weight and low viscosity, and good fluidity and wettability. Its property of easy hydrolysis cross-linking and generating ethanol makes it suitable for use as an in-situ cross-linking agent in specific application scenarios. The high purity grade and extremely low volatile content provide reliable quality assurance for downstream high-end applications, while its flash point index provides basic safety guarantees for storage and use.


II. Core Reaction Characteristics and Application Value


The application value of product 218 of low-viscosity vinyl silicone oil stems from the active vinyl groups at both ends of the molecule. In the presence of peroxides and other vulcanizing agents, these vinyl groups can undergo cross-linking reactions with the rubber molecular chains, forming a three-dimensional network structure; under the action of platinum catalysts, they can undergo efficient silane hydrogen addition reactions with hydrogen-containing silicone oils, achieving rapid curing at room temperature or medium temperature. This curing method has no by-products, a small shrinkage rate, and is easy to control, making the resulting liquid silicone rubber highly suitable for use in precision sealing, flexible molds, medical catheters, and other fields with extremely high purity and dimensional accuracy requirements.


Compared with traditional vinyl double head caps, this product has unique advantages as a pre-polymer of rubber: its molecular structure already contains a segment of silicone chain, which can provide more flexible molecular structure control and more optimized process parameters during the polymerization reaction, effectively improving the processing performance and mechanical strength of the silicone rubber.


III. Wide Application Areas


Product 218 of low-viscosity vinyl silicone oil can play a key role in the following high-end application fields due to its high reactivity and low viscosity characteristics:


1. Base material for high-temperature vulcanized silicone rubber (HTV). This product is the core basic raw material for HTV silicone rubber, and its vinyl groups, in the presence of peroxides and other vulcanizing agents, undergo cross-linking reactions with the rubber molecular chains, giving HTV silicone rubber excellent mechanical strength, elastic recovery, and stability in high and low temperature environments. These properties make it an ideal choice for manufacturing components such as sealing rings, pads, and cable insulation layers in demanding conditions.


2. Pre-polymer, replacing vinyl double head caps. This product can be used as a pre-polymer, replacing traditional vinyl double head caps, and providing more flexible molecular structure control and more optimized process parameters during the synthesis of silicone rubber, effectively improving the processing performance and mechanical strength of the silicone rubber.


3. Main raw material for room-temperature or medium-temperature curing liquid silicone rubber and organic silicone gels. In the preparation of room-temperature or medium-temperature curing liquid silicone rubber and organic silicone gels, this product undergoes silane hydrogen addition reactions with hydrogen-containing silicone oils under the action of platinum catalysts, achieving rapid curing at room temperature or medium temperature. The liquid silicone rubber produced is suitable for precision encapsulation, flexible molds, medical catheters, baby nipples and other fields that require extremely high purity and dimensional accuracy; the organic silicone gel produced, due to its excellent light transmittance, buffering and damping properties, is widely used in the protection of electronic components, the bonding of optical devices and the interface materials of medical sensing equipment.


IV. Modifier for Polyurethane, Acrylic and Other Materials. This product can be used for the modification of polyurethane, acrylic and other high molecular materials. By participating in the polymerization reaction through the terminal vinyl groups, the silicone oxygen chain segments are introduced into the main chain of the organic polymer, significantly improving the weather resistance, aging resistance, ultraviolet resistance and toughness of the material.


IV. Packaging Specifications and Storage Conditions


Product low-viscosity vinyl silicone oil 218 is available in various packaging specifications such as IBC ton containers, 200-liter iron barrels/plastic barrels, and 25-liter plastic barrels. Custom packaging can also be provided. This product is stored and transported in accordance with non-hazardous chemicals. Under room temperature conditions, it is stable in nature. During storage, it must not come into contact with open flames and water. It should be kept in a ventilated and dry environment, protected from sunlight and rain. The original packaging should not be opened without sealing, and the storage period is one year from the production date. After the expiration date, it must be re-inspected to ensure that all indicators are qualified before use.


V. Quality Assurance and Industrial Chain Value


Product low-viscosity vinyl silicone oil 218 has established a strict quality control system during the production process. Key indicators such as appearance, viscosity, flash point and volatile matter are tested throughout the process to ensure consistency and reliability between batches. With the continuous growth of demand from downstream industries such as new energy, electronic packaging, medical, and automotive for high-performance organic silicone materials, this product, thanks to its good processing fluidity brought by low viscosity, high reactive vinyl groups and the inherent excellent properties of organic silicone materials such as high temperature resistance, weather resistance, electrical insulation and physiological inertness, is becoming a key bridge connecting basic organic silicone raw materials and high-end functional downstream products, providing strong raw material support for promoting product innovation and technological upgrading in related industries.