Patent of High Hydrogen-Containing Silicone Oil Terminated with Bulky Groups for Markedly Improved Thermal Stability of Silicone Oil - Methyl Hydrogen Silicone Fluid Factory
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According to the information from the National Intellectual Property Administration, a Chinese company has filed a patent entitled “A High Hydrogen-Containing Silicone Oil Terminated with Bulky Groups and Its Preparation Method”, with publication number CN122705905A and application date in July 2026.
The patent abstract states: This application discloses a preparation method for high hydrogen-containing silicone oil terminated with bulky groups. The preparation method comprises: mixing methyldichlorosilane, a bulky end-capping agent and a non-polar solvent, followed by co-hydrolysis reaction via water addition at 0~8 °C. After the reaction, stratification, water washing and solvent removal are performed to obtain a hydrolysate; the hydrolysate is distilled to separate linear bodies; under the conditions of 60~90 °C and pressure of -0.08 MPa ~ -0.1 MPa, a phosphonitrile chloride catalyst is added to the linear bodies for catalytic condensation and rearrangement reaction; finally, neutralization, filtration and stripping of low-boiling components are carried out to obtain the finished product. By introducing bulky groups for end capping, the preparation method provided herein effectively restrains molecular chains and markedly improves the thermal stability and hydrolysis stability of the silicone oil. Meanwhile, the phosphonitrile chloride catalysis route features narrow molecular weight distribution, low silanol content, low volatile matter and environmentally friendly process, which greatly improves product quality. The product is suitable for high-end applications such as semiconductor packaging.
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Introduction
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