Green Breakthrough: Novel Hydrogen Silicone Oil-CO2 Composite Blowing Agent Unveiled


      A new patent reveals a composite blowing agent combining Hydrogen Silicone Oil and supercritical CO2. This innovation promises precise cell structure control and enhanced environmental friendliness for polymer foaming processes.
      A patent titled “A Hydrogen Silicone Oil-CO2 Composite Blowing Agent and Preparation Method” (Application No.: CN202511676969.5) has been published, marking a significant step toward green chemistry in the polymer foaming industry .
      This technology moves beyond traditional physical blowing agents (such as alkanes), which pose flammability risks and environmental hazards. The new agent utilizes supercritical CO2 as the primary foaming component, mixed with a hydrogen silicone oil matrix (hydrogen mass fraction 0.8%-1.5%). The supercritical CO2 volume fraction is controlled between 5% and 15%, ensuring high diffusivity and solubility within the silicone oil matrix.
      The innovation incorporates surface-modified nano-silica and non-ionic surfactants as auxiliary agents. By treating nano-silica with a silane coupling agent, agglomeration is prevented, allowing for precise control of the foam cell structure. This results in excellent stability and uniformity during foaming .
      This breakthrough addresses the traditional challenge of low CO2 solubility in polymer matrices, offering a non-flammable, low-GWP (Global Warming Potential) alternative to current blowing agents. Hydrogen silicone oil serves as an "interface bridge," enhancing the interaction between the nano-materials and the polymer matrix.
    The application prospects are vast, including automotive lightweighting parts, high-performance insulation materials, and footwear materials. As industries push for carbon neutrality, this hydrogen silicone oil-based solution represents a major leap forward in sustainable material processing.