In the vulcanization and curing systems of room-temperature vulcanizing silicone rubber, benzene-based silicone rubber, and benzene-based silicone resin, hydrogen-containing silicone oil serves as the core component of the crosslinking agent. The molecular structure and hydrogen content of the hydrogen-containing silicone oil directly determine the efficiency of the crosslinking reaction and the performance of the final product. Our company's product, hydrogen-containing silicone oil 235, with the chemical name benzyl tri-(dimethylsiloxane) silane, is a benzene-based hydrogen-containing silicone oil with multiple active silicon-hydrogen reaction sites. With its excellent compatibility with various silicone materials, high purity, and precise crosslinking reaction activity, it demonstrates extensive industrial value in applications such as the vulcanization of room-temperature vulcanizing silicone rubber, the crosslinking of benzene-based silicone rubber, and the curing of benzene-based silicone resin. It provides flexible and efficient crosslinking solutions for the performance design of high-end silicone products.


1. Core physical and chemical properties of the product


Product hydrogen-containing silicone oil 235 is a colorless transparent liquid with a density of 0.945, a refractive index of 1.4412 at 20 degrees Celsius, a boiling point of 90 degrees Celsius (at 2 mmHg pressure), a flash point of 87 degrees Celsius, and a content of not less than 98% as detected by gas chromatography. High purity is one of the core advantages of this product. The content level of not less than 98% effectively reduces the adverse effects of impurities on the kinetics of the crosslinking reaction and the performance of the final product, ensuring the stability of the vulcanization process and the consistency of the product performance. The low density and moderate refractive index make it have good dispersibility and optical matching properties in various silicone matrices. The boiling point and flash point parameters provide precise reference for the setting of processing conditions.


2. Excellent compatibility characteristics


Product hydrogen-containing silicone oil 235 has outstanding compatibility advantages and can be well mixed with various silicone materials such as methyl silicone oil, liquid silicone rubber, benzene-based silicone rubber, and benzene-based silicone resin. The benzene group in its molecular structure gives it a natural affinity for benzene-based silicone materials, ensuring uniform dispersion in benzene-based silicone rubber and benzene-based silicone resin systems and avoiding local crosslinking inhomogeneity or product defects caused by phase separation. At the same time, this product also has excellent compatibility with conventional methyl-based silicone materials, enabling flexible application across the two major organic silicone systems, and providing a wider selection space for formulation engineers.


3. Main application fields


Product hydrogen-containing silicone oil 235, with its multi-reactive site design, excellent compatibility, and high purity, can play a key crosslinking role in several high-end organic silicone application fields, including:


1. Crosslinking agent for room-temperature vulcanizing liquid silicone rubber. In the vulcanization system of room-temperature vulcanizing liquid silicone rubber, product hydrogen-containing silicone oil 235 serves as the crosslinking agent. The active silicon-hydrogen bonds in its molecular structure undergo a silicon-hydrogen addition reaction with vinyl groups under the action of a platinum catalyst, forming a stable three-dimensional network structure. This product has good compatibility with both methyl-based and benzene-based liquid silicone rubbers and can adapt to the crosslinking requirements of different types of room-temperature vulcanizing silicone rubber, resulting in vulcanized rubber with good mechanical strength and heat aging resistance, suitable for the production of medical catheters, baby pacifiers, electronic and electrical buttons, and precision seals, etc.


2. Crosslinking and performance regulation of benzene-based silicone rubber. Benzene-based silicone rubber has excellent high-temperature and radiation resistance and is indispensable in aerospace and nuclear energy fields. Product hydrogen-containing silicone oil 235, as the crosslinking agent for benzene-based silicone rubber, has excellent compatibility with the benzene-based silicone rubber matrix, and the crosslinked products have further optimized heat resistance and radiation resistance. By adjusting the dosage of the crosslinking agent, the hardness, modulus, and elongation of the vulcanized rubber can be finely controlled to meet the differentiated performance requirements of various application scenarios such as aerospace seals, radiation-resistant seals, and high-temperature insulation parts. III. Curing Crosslinking Agents for Phenyl Silicone Resins. In the additionally curing system of phenyl silicone resins, the product side-terminal hydrogen-containing silicone oil 235 can effectively participate in the construction of the resin's crosslinking network. Its hydrogen groups react with the vinyl groups in the resin, enhancing the crosslinking density, hardness, and thermal stability of the cured product. It is suitable for applications requiring high curing degree and thermal stability, such as high-temperature resistant coatings, electronic packaging materials, optical transparent hard coatings, and radiation protection layers.


IV. Curing Crosslinking Agent for Methylphenyl Mixed-Type Silicone Rubber. In some mixed systems that need to balance the heat resistance of phenyl and the economy of methyl silicone rubber, the product side-terminal hydrogen-containing silicone oil 235 is used as a hydrogen-containing crosslinking agent. It can simultaneously undergo crosslinking reactions with both methyl vinyl silicone rubber and phenyl vinyl silicone rubber components, achieving a co-crosslinking effect, improving the compatibility and mechanical properties of the mixed system, and providing greater flexibility for formulation design.


V. Crosslinking and Foaming Regulation of Organic Silicone Foam Materials. In the preparation of organic silicone foam materials, the product side-terminal hydrogen-containing silicone oil 235 can both participate in the network construction as a crosslinking agent and release hydrogen through its silicon-hydrogen bonds with active groups such as hydroxyl groups, assisting the foaming process. By regulating the relative rates of crosslinking and foaming reactions, phenyl organic silicone foam materials with different densities and pore structure can be prepared, suitable for applications such as sealing buffers, heat insulation protection, and lightweight structural components.


VI. Curing Regulator for High-performance Organic Silicone Adhesive. In the formulation of organic silicone adhesive, the product side-terminal hydrogen-containing silicone oil 235 can be used as a curing regulator, adjusting the crosslinking density to balance the peel strength and cohesive strength of the adhesive, suitable for applications such as high-temperature protective films, electronic tapes, and special marking tapes.


IV. Packaging Specifications and Storage Recommendations


The product side-terminal hydrogen-containing silicone oil 235 is available in two packaging specifications: 15 kilograms and 200 kilograms. It is packaged in coated iron drums to prevent direct contact with metal, ensuring the purity and stability of the product during storage and transportation. The product should be stored in a well-ventilated and cool place, away from fire sources and strong oxidants, avoiding direct sunlight, and keeping the container sealed to prevent water or impurities from entering, ensuring the stability of the active silicon-hydrogen bonds. During transportation, it should be handled with care, avoiding packaging damage.


V. Quality Assurance and Market Positioning


The product side-terminal hydrogen-containing silicone oil 235 has established a strict quality control system during production. Key indicators such as product appearance, specific gravity, refractive index, boiling point, flash point, and gas chromatography content are monitored throughout the process to ensure consistency and reliability between batches.


With the continuous growth in demand for high-performance organic silicone materials in strategic fields such as aerospace, nuclear equipment, optoelectronic information, and new energy vehicles, the demand for curing agents with high crosslinking efficiency, good compatibility, and stable quality is expanding. The product side-terminal hydrogen-containing silicone oil 235, with its multi-reactive sites for crosslinking, wide applicability across phenyl and methyl systems, and high purity quality assurance, is becoming an important crosslinking modifier option in the fields of additionally curing silicone rubber, phenyl silicone rubber, and phenyl silicone resin crosslinking modification, providing reliable raw material support for promoting the domestic organic silicone industry towards high-performance and functionalization.