Method for converting organosilicon polymers containing sih repeat units and organopolysilazane precursors to new and useful polymers and silicon nitride enriched ceramic materials

Abstract From the Canadian patent

A method for preparing preceramic polymers is disclosed. This method includes the steps of reacting in solution anhydrous ammonia with a mixture of R1SiHX2 (where R1 and X are as described above) and R2SiX3 (where R2 as described above) can be used to form a different and useful preceramic polymer by reacting it with an organosilicon polymer containing Si-H repeat units. The Si-H containing organosilicon polymer is preferably selected from the group consisting of organopolysilanes of the formula (RSiH)X(RSi)yn (where R is a lower alkyl group having from 1 to about 6 carbon atoms, a lower alkenyl group having from 2 to about 6 carbon atoms, or a substituted or unsubstituted lower aryl group …