Epoxy-based silane oligomers can enhance the adhesion and bonding strength between most common emulsions (e.g., waterborne epoxy, waterborne acrylic, waterborne polyurethane) and inorganic substrates such as metal, glass, ceramic, and concrete. Due to their high reactivity, they form strong covalent bonds with both the emulsion and the inorganic substrate, resulting in strong adhesion that is difficult to break. Under acidic conditions (approx. pH 4), the adhesion improvement is more pronounced. They are stable in water and maintain performance after long-term storage.
Applications
2.1 Metal Surface Treatment
Wuhan Disai New Materials Co., Ltd. patented A method for preparing silane oligomer aqueous solution for metal protection. The method involves mixing hydrolyzed epoxy silane and amino silane solutions, followed by ring-opening polymerization at 50–90°C for 0.5–2 h to obtain a silane oligomer aqueous solution. After coating on metal surfaces and drying, the resulting passivation film exhibits good corrosion resistance and high-temperature yellowing resistance.
2.2 Waterborne Coatings
Nanjing Changjiang Paint Co., Ltd. patented A long-lasting waterborne phenolic epoxy conductive antistatic coating and its preparation method. The formulation includes Momentive CoatOSil MP200 (an epoxy-based silane oligomer), which forms strong covalent bonds with waterborne organic resins, inorganic pigments/fillers, and substrates, improving adhesion.
Shanghai Huayi Fine Chemical Co., Ltd. patented An aviation fluid-resistant waterborne coating and its preparation method and application. The formulation includes Momentive CoatOSil MP200, which forms Si–O–Si networks through siloxane condensation, increasing crosslinking density, improving resistance to phosphate ester hydraulic fluids, and enhancing adhesion, water resistance, impact resistance, and salt spray resistance.
Shandong Bengteng Paint Co., Ltd. patented A thick-applied waterborne epoxy coating for storage tanks and its preparation method and application. The formulation includes Momentive CoatOSil MP200. By optimizing component ratios and preparation processes, the coating exhibits excellent physical properties, chemical resistance, water/acid/alkali resistance, good anticorrosion performance, stable conductivity, and excellent buildability, improving construction efficiency.
Suzhou Jiaweixin New Materials Co., Ltd. patented A preparation method for waterborne epoxy-modified silicone high-temperature anti-corrosion coatings, where alkoxysilane oligomers are added to prepare a waterborne epoxy-modified silicone emulsion.
Product Introduction
Wuhan Hugarise New Material Co., Ltd. offers an epoxy-based silane oligomer (PCU-K11), comparable to imported products such as Momentive CoatOSil MP200, Evonik Dynasylan® HYDROSIL 2926, and Shin-Etsu KR-516.
