In the process of the continuous development of organic silicon materials towards high-performance and functionalization, the precise design and control of the end-group structure of the molecular chain have become the key factor determining the performance of downstream products such as additively formed silicone rubber, silicone gel, vinyl silicone oil, and platinum complexes. The product we have launched, vinyl double end-group, with the chemical name tetramethyl diethylene glycol dimethicone, is a high-purity, double-end containing vinyl special silane end-group monomer. With its precise bivalent functional group structure and a purity of up to 99.5%, it demonstrates indispensable industrial application value in numerous high-end application fields such as the construction of cross-linking systems in additively formed silicone rubber, the regulation of molecular weight of vinyl silicone oil, the modification of silicone resins, and the formation of platinum catalyst complexes. It provides key end-group supporting materials for the organic silicon industry chain.


I. Core Physical and Chemical Properties of the Product


The product vinyl double end-group is a colorless transparent liquid with a boiling point range of 133 to 139 degrees Celsius, a density of 0.818 grams per cubic centimeter, a refractive index of 1.4188 to 1.4123, a purity of no less than 99.5%, and a vinyl content of 29.0%. Each end of the product's molecular structure contains one reactive vinyl group. This precise bivalent functional group design enables it to have both end-group sealing and chain extension functions in organic silicon synthesis. Its extremely high purity level and vinyl content indicators provide reliable guarantees for the cross-linking efficiency and mechanical properties of downstream products such as additively formed silicone rubber and vinyl silicone oil.


II. Core Reaction Characteristics and Application Value


The application value of the product vinyl double end-group stems from its precise design of having one reactive vinyl group at each end of the molecular structure. This structure enables it to have two core functions in organic silicon synthesis:


As a sealing agent, when used, this product can precisely introduce vinyl groups at both ends of the polysiloxane molecular chain, resulting in vinyl-sealed polysiloxane. These terminal vinyl groups participate in the network construction in the subsequent silane hydrogen addition reaction. In the additively formed silicone rubber system, the vinyl double end-group introduces reactive vinyl groups at both ends of the molecular chain, ensuring that each molecular chain becomes an effective bearing chain segment in the cross-linking network, thereby improving the mechanical properties and elongation at break of the cured rubber. In the synthesis of vinyl silicone oil, as a molecular weight regulator, the addition amount of this product can be precisely controlled to regulate the polymerization degree, obtaining a series of vinyl silicone oil products with different viscosities, which are then used in additively formed silicone rubber and high-temperature vulcanized silicone rubber, etc.


III. Main Application Areas


The product vinyl double end-group can play an important role in the following key application areas due to its precise bivalent functional group structure:


1. Cross-linking components of additively formed silicone rubber and silicone gel. This product is a core additive in the production process of additively formed silicone rubber and silicone gel. As a provider of terminal vinyl groups, it reacts with hydrogen-containing silicone oil under the action of platinum catalyst to form a three-dimensional cross-linking network, widely used in medical catheters, electronic potting compounds, power insulators, and infant products, etc.


2. Sealing agent for vinyl silicone oil synthesis. This product is a key end-group supporting raw material for the production of various viscosity vinyl silicone oils. By adjusting the addition amount of this product, the polymerization degree of polysiloxane can be precisely controlled, obtaining a series of vinyl silicone oil products with different viscosities, which are then used in additively formed silicone rubber, high-temperature vulcanized silicone rubber, etc.


3. Copolymer monomer for vinyl silicone resin. In the synthesis of vinyl silicone resins, this product can be used as a terminal copolymer monomer, introducing vinyl groups at the ends of the resin molecular chains, providing reaction active sites for subsequent curing and crosslinking. It is widely used in high-temperature resistant coatings, electronic packaging materials, and optical transparent coatings, etc.


IV. Ligands of platinum complex catalysts. This product can also be used as a ligand component of platinum complex catalysts. Through the coordination of vinyl groups with platinum, it regulates the activity and stability of the catalyst and plays an important role in the catalytic system of silicon hydrogen addition reactions.


IV. Packaging Specifications and Storage Conditions


The vinyl double cap of the product is packaged in plastic drums or iron drums. The conventional specifications are twenty kilograms of plastic drums or one hundred and sixty kilograms of iron drums. Custom packaging can also be provided according to customer requirements. The product should be stored in a cool, dry, and ventilated warehouse, away from fire sources and strong oxidants. It should be transported as a dangerous goods. During handling, it should be loaded and unloaded gently to prevent packaging damage.


V. Quality Assurance and Industrial Chain Value


The vinyl double cap of the product has established a strict quality control system during the production process. Key indicators such as product appearance, boiling point, density, refractive index, purity, and vinyl content are tested throughout the process to ensure consistency and reliability between batches. From an industrial chain perspective, this product, with its precise double vinyl terminal structure and up to 99.5% purity, plays a key role in "terminal structure determination" in the synthesis of addable silicone resins, vinyl silicone oils, and silicone resins. As the demand for high-performance addable silicone resins and vinyl silicone oils from downstream industries such as healthcare, electronics, power, and cosmetics continues to grow, the vinyl double cap of this product, with its precise dual functional group design, stable high purity, and flexible multi-specification packaging, is becoming an important terminal monomer option in the field of precise organic synthesis, providing strong raw material support for promoting product innovation and technological upgrading in related industries.