(August 6, 2026) Recently, new progress has been made in the field of specialty silicone materials in China. The synthesis process of carbon-hydroxyl silicone oil (carbon-hydroxyterminated polydimethylsiloxane) continues to be optimized, product batch stability and controllability of functional groups have been further enhanced, and penetration rates in downstream fields such as high-end resin modification, functional coatings, new energy support, and textile and leather have steadily increased, accelerating the localization and substitution process of high-end reactive silicone oil.

Carbon-hydroxy silicone oil is a reactive modified polysiloxane, with a carbon-linked hydroxyl group (C-OH) at the molecular end. It relies on a Si-C bond structure with higher bond energy, distinguishing it from traditional Si-O-C type modified silicone oils. It has superior hydrolysis resistance and moisture heat resistance. It can chemically bond with polyurethane, epoxy resin, polyester, and acrylic resin, connecting organosilicon segments into a polymer network to prevent additive precipitation and migration. It is a key intermediate raw material for high-performance polymer modification.

According to materials laboratory test data, epoxy resin modified with carbon hydroxy silicone oil undergoes a thousand-hour aging test at 85°C and 85% humidity, maintaining a mechanical property retention rate of over 80%; Modified polyurethane materials have significantly enhanced flexibility and water resistance, making them suitable for high-end synthetic leather and waterproof textile fabric production scenarios; When applied to coating systems, it provides long-lasting smoothness, anti-graffiti, weather resistance, and wear resistance without compromising the adhesion of the paint film. It is widely used in industrial protective coatings, plastic surface coatings, and other fields.

Beyond the resin and coating sector, this product is continuously expanding its application boundaries. In the textile industry, hydrophilic silicone softening finishing agents can be prepared to address the water-repellent and stain-prone issues of traditional silicone oil fabrics, giving fabrics a soft, moisture-wicking, and anti-static overall feel; Used as a reactive release additive in plastic and glass fiber molding processes, leaving no silicone oil residue during demolding and reducing product defect rates; Additionally, in some high-end personal care formulas, it is used as a moisturizing and conditioning ingredient to improve skin feel and hair smoothness.

Industry insiders explained that in the past, precise functional control and low-small molecule residue production technology for high-performance carbon hydroxy silicone oil were long controlled by overseas companies, while domestically, general-purpose products were the main focus. Since 2026, many domestic new organosilicon material companies have achieved controlled customization of hydroxyl values and viscosity through continuous synthesis and molecular distillation devolatilization processes, reducing the content of cyclic impurities. Several models have passed validation by leading downstream customers, gradually breaking the import monopoly.

Currently, downstream industries such as new energy, wind power, electronic packaging, and high-end building materials continue to expand, and the market has strong demand for heat-resistant, long-life polymer materials, directly driving up demand for reactive silicone additives. Industry analysts point out that future competition will shift from simple price competition to a comprehensive strength contest of functional group customization, low impurity control, and comprehensive technical services. As synthesis technology continues to mature, carbon hydroxy silicone oil will be implemented in more high-end manufacturing scenarios, helping the domestic polymer materials industry move toward higher value-added directions.