Patent ID: 8362199

Claim:
A process for production of a borazine-based resin that is a polymer having a borazine skeleton on a main chain or a side chain thereof, wherein the process comprises: a first step of polymerizing a B,B′,B″-trialkynylborazine and a hydrosilane in the presence of a metal catalyst in a polymerization solvent, thereby providing a polymerization system, a second step of adding to the polymerization system a particulate scavenger which is insoluble in the polymerization system of the first step and adsorbs a metal component from the metal catalyst, after completion of the first step, the particulate scavenger being surface-modified particles, and a third step of filtering out the scavenger to which the metal component has been adsorbed after completion of the second step, wherein the particulate scavenger is selected from the group consisting of wherein O represents a silica gel, and wherein amount of the particulate scavenger added is 0.01 to 100 parts by weight with respect to 100 parts by weight of a total of the B, B′, B″-trialkynylborazine, the hydrosilane, the metal catalyst and the polymerization solvent, so as to provide a borazine-based resin composition which comprises the borazine-based resin and a solvent therefor, after said third step of filtering out the scavenger, that has an impurity content, of metal from the metal catalyst, of no greater than 30 ppm.