초록 ▼

The invention is concerned with novel polysilamethylenosilane polymers having polysilane-polycarbosilane skeleton which can be prepared in one-step reaction from mixtures of chlorosilaalkanes and organochlorosilanes with alkali metals in one of appropriate solvents or in combination of solvents ther

The invention is concerned with novel polysilamethylenosilane polymers having polysilane-polycarbosilane skeleton which can be prepared in one-step reaction from mixtures of chlorosilaalkanes and organochlorosilanes with alkali metals in one of appropriate solvents or in combination of solvents thereof. Such polysilamethylenosilane polymers are soluble and thermoplastic, and can be pyrolyzed to obtain improved yields of silicon carbide at atmospheric pressure.

대표청구항 ▼

A process for the preparation of polysilamethylenosilane polymers having formula III which comprises dechlorinating 2,4,6-trisilaheptanes having formula I, dimethyldichlorosilane and trichlorosilanes having formula II with sodium in the presence of toluene or mixture of toluene and tetrahydrofuran a

A process for the preparation of polysilamethylenosilane polymers having formula III which comprises dechlorinating 2,4,6-trisilaheptanes having formula I, dimethyldichlorosilane and trichlorosilanes having formula II with sodium in the presence of toluene or mixture of toluene and tetrahydrofuran as solvent at the temperature in the range of 100°to 150°C.: [Figure] (I) wherein, R1 represents methyl or chlorine atom, [Figure] (II) wherein, R2 represents methyl, vinyl, allyl, octadecyl, cyclohexyl or trimethylsilylmethyl group, [Figure] (III) wherein, R1 represents methyl or, when R1 in formula I is chlorine, Si－Si bond, and R2 is defined same as R2 in formula II.