Novel polymetallocarbosilane, and process for its production

A process for producing a novel polymetallocarbosilane having a number average molecular weight of about 700 to 100,000, which comprises mixing a polycarbosilane having a number average molecular weight of 200 to 10,000 and containing a main-chain skeleton represented by the general formula ##STR10## wherein R represents a hydrogen atom, a lower alkyl group or a phenyl group,

• with an organometallic compound represented by the general formula
• MX.sub.4
• wherein M represents Ti or Zr and X represents an alkoxy group having 1 to 20 carbon atoms, a phenoxy group or an acetylacetoxy group,
• in such proportions that the ratio of the total number of the structural units --Si--CH.sub.2 -- of the polycarbosilane to the total number of the structural units --M--O-- of the organometallic compound is within the range of from 2:1 to 200:1;
• and heating the resulting mixture in an atmosphere inert to the reaction, thereby to bond at least one of the silicon atoms of the polycarbosilane to the metallic atom (M) of the organometallic compound through an oxygen atom.