Patent attributes
The invention relates to a process for preparing crosslinked or branched organopolysilanes which contain at least one unit of the general formulae 1 and/or 2RSi═, (1)═Si═, (2)at least one unit of the general formula 3R2Si═, (3)and optionally units of the general formula 4R3Si— (4)in which silane(s) of the general formulae 1a and 2aRSiX3, (1a)SiX4, (2a)and 3aR2SiX2, (3a)and optionally silane of the general formula 4aR3SiX, (4a)where R is hydrocarbyl and X is halo,are reacted with elemental metal, the addition of the reactants being such that the silane of the general formula 3a in the reaction with elemental metal contains at most 2 mol % of silane which is selected from silanes of the general formulae 1a and 2a, and to the organopolysilanes obtainable by the process.
