Methods of preparing polysilazane resin with low halogen content

摘要

Methods of producing low-halogen-containing polysilazane resins, which are used to make silicon carbide fibers and ceramic coatings, provide processes for removing halogens, including chlorine, from precursor polysilazane resins.

主权项

1. A method for preparing a substantially halogen-free polysilazane resin, comprising reacting a precursor polysilazane resin containing more than 1 wt % of halogen with hexaalkyldisilazane in the presence of a catalytic amount of at least one of a strong acid or a salt of a strong acid.