(October 20, 2026) There have been significant structural changes in the field of silicone functional materials. Epoxy silicone oil, as a key modified material that combines the heat resistance and low-stress properties of silicones with the reactivity of epoxy groups, is gaining increasing demand from various sectors such as traditional textiles and coating additives. Its application is also expanding into high-value-added fields like new energy and electronic encapsulation. Domestic high-end products are seeing steady growth, and import and export orders have increased significantly.

Epoxy silicone oil is a modified polysiloxane in which epoxy reactive groups are incorporated into its molecular chain. It can undergo cross-linking reactions with epoxy resins and amine curing agents. This makes it possible to address the limitations of epoxy systems, such as their brittleness and high internal stress, while still maintaining the excellent insulating, temperature-resistant, and low surface tension properties of silicones. The product comes in two types: side-epoxy and end-epoxy. It is widely used as a toughener for epoxy resins, a leveling agent for coatings and inks, an interface coupling agent for composite materials, a textile softener, and a tackifier for additionial silicone rubbers. It serves as an important functional intermediate in the fine chemical sector of silicones.

Industry research indicates that domestic production of epoxy silicone oil is concentrated in the East China region. In recent years, there has been sufficient capacity for general-purpose products, leading to intense competition. However, high-epoxy-value, low-volatility, and narrow-viscosity-distribution high-end epoxy silicone oils have long faced supply shortages, and much of these products were previously imported. In recent years, domestic companies have made progress in improving the molecular structure and implementing continuous removal processes, thereby enhancing batch stability. Domestic high-end products now match international counterparts in terms of epoxy value accuracy and volatility control, effectively reducing the raw material costs for domestic copper-clad laminate and electronic sealing material manufacturers.

In terms of downstream demand, the growth rate of traditional textile additives has slowed down, while electronics and new energy industries are driving growth. In the electronics sector, epoxy silicone oil is used in high-end copper-clad laminates and power device encapsulants to reduce internal stress and improve the material’s resistance to thermal shock. In new energy applications, it is used in battery insulation coatings and photovoltaic frame sealing systems to enhance the durability of sealants. In the coatings and inks industry, it is utilized for its ability to improve surface smoothness and texture. As domestic high-end manufacturing becomes more widespread, demand for high-performance epoxy silicone oil is growing faster than that for other silicone additives.

Industry experts say that the recovery of upstream silicone raw material prices provides cost support for the production of epoxy silicone oil. Additionally, stricter environmental regulations overseas have led to some capacity reductions abroad, creating opportunities for domestic exports. Recently, there has been an increase in foreign inquiries and sample evaluations. Overseas customers pay attention to product batch stability, compliance documents such as REACH, and the delivery time of samples.

The industry expects that future development of the epoxy silicone oil industry will follow two directions: first, product differentiation – companies will reduce low-quality, homogeneous production and focus on developing customized products for specific applications; second, green process improvements – optimizing synthesis methods to reduce by-products and VOC emissions, aligning with global trends toward sustainable and environmentally friendly chemical production. In the long term, with the continued development of 5G, new energy vehicles, and advanced composite materials, the market for high-performance epoxy silicone oil will expand further. Domestic substitution and expansion into overseas markets will be key aspects of industry development.