Patent ID: 8466076

Claim:
Process for producing unmeltable polysilane-polycarbosilane copolymers which are soluble in inert solvents, comprising the steps of: providing the product of a disproportionation of a methylchlorodisilane or a mixture of several methylchlorodisilanes of the composition Si 2 Me n Cl 6-n , wherein n=1-4, wherein the disproportionation is carried out with a Lewis base as a catalyst, wherein this product is a chlorine-containing, crude polysilane/oligosilane containing hydrocarbon groups, and thermally postcrosslinking the crude polysilane/oligosilane to a polysilane-polycarbosilane copolymer, characterized in that the chlorine content of the polysilane-polycarbosilane copolymer is lowered by reacting crude polysilane/oligosilane with a substitution agent, by which chlorine bound therein is replaced with a chlorine-free, nitrogen-containing substituent, wherein the substitution agent is selected from amines of formula HNR 1 R 2 , wherein R 1 and R 2 , independently of one another, hydrogen, alkyl, alkenyl, aryl, arylalkyl, alkylaryl, arylalkenyl, alkenylaryl, which are possibly substituted with other amino groups, or (R 3 ) 3 Si—[NR 3 —Si(R 3 ) 2 ] m with l=0 to 6, or wherein R 1 and R 2 together represent an alkylene radical with 4 or 5 carbon atoms or —Si(R 3 ) 2 —[NR 3 —Si(R 3 ) 2 ] n — with n=1 to 6, wherein in all cases each radical R 3 , independently of other R 3 radicals, may be hydrogen, alkyl or aryl, as well as cyclic amines, selected from among pyrrole, indole, carbazole, pyrazole, piperidine and imidazoie, and mixtures of said amines or from among compounds having an N—Si grouping.