Method for the continuous production of silicon compounds bearing amino groups

A process for preparing N-(organylaminoorganyl)- and (N,N-diorganylaminoorganyl)triorganylsilanes of the formula (1)

• R3-nR1nSi—R2—NR3R4 (1)
• where
• R is a hydrocarbon radical or an alkoxy radical which has 1-10 carbon atoms and is saturated or unsaturated, branched or unbranched, substituted or unsubstituted,
• R1 is a hydrocarbon radical which has 1-10 carbon atoms and is saturated or unsaturated, branched or unbranched, substituted or unsubstituted,
• R2 is a hydrocarbon radical which has 1-10 carbon atoms and is saturated or unsaturated, branched or unbranched, substituted or unsubstituted,
• R3, R4 are each hydrogen, or a hydrocarbon radical which has 1-10 carbon atoms and is saturated or unsaturated, branched or unbranched, substituted or unsubstituted, with the proviso that R3, R4 may each be the same or different and are optionally bonded to one another, in which case the resulting ring may also contain heteroatoms, with the proviso that not more than one of R3 and R4 is hydrogen,
• X is chlorine, bromine or iodine,
• n is equal to 1, 2 or 3 and
• the process comprising continuously reacting cyclic or acyclic amines of the formula (2)
• H—NR3R4 (2)
• which have a water content of from 0 to 20,000 ppm
• with (haloorganyl)silanes of the formula (3)
• R3-nR1nSi—R2—X (3)
• in the steps of:
• a) uniformly adding the (haloorganyl)silane of the formula (3) and the amine of the formula (2) to a continuous reactor at a temperature of from 50 to 250° C., the residence time of the reactants in the reactor being between 1 min and 120 min and the amine of the general formula (2) being used in a 1- to 100-fold molar excess, and
• b) adding at least one nitrogen compound which forms a removable liquid or solid adduct with hydrogen halides and removing adducts formed therewith.