Process for preparing dimethylaminosilanes.

摘要

A process for preparing a dimethylaminosilane having the general formula:
H4-a Si[N(CH3)2]a
wherein a has a value of 2 to 4 inclusive, which process comprises reacting (1) copper-activated silicon particles and (2) dimethylamine gas in a gas-solid reactor at a temperature in the range of about 195 DEG C. to about 400 DEG C.
<??>Preferably a fluid bed reactor is used and the copper-activated silicon particles are prepared in situ during the process.
<??>The described process avoids the use of an intermediate product between silicon and the desired silane by using a one step reaction.
<??>The dimethylaminosiane products are useful as polymer cross-linking agents, e.g. for vulcanisabie silicone rubber compositions,