Preparation of silylamine hydrochlorides

A process for preparing the hydrochloride salt of a silyl(alkyl)amine which comprises reacting (1) a silane of the formula (RO).sub.n R'.sub.3-n SiR''Cl with at least two moles per mole of (1) of (2) a compound of the group consisting of R'''.sub.2 NH and HR'''NCH.sub.2 CH.sub.2 NR'''.sub.2 to form (3) {(RO).sub.n R'.sub.3-n --SiR''}.sub.m NR'''.sub.3-m, (RO).sub.n R'.sub.3-n SiR''NR'''CH.sub.2 CH.sub.2 NR'''.sub.2 or {(RO).sub.n R'.sub.3-n SiR''NR'''CH.sub.2 --}.sub.2, (3) having a boiling point higher than (2) and thereafter removing unreacted (2) from the reaction zone by volatilization whereby amine hydrochlorides of the formulae {(RO).sub.n R'.sub.3-n SiR''}.sub.m NR'''.sub.3-m.HCl, (RO).sub.n R'.sub.3-n SiR''NR'''CH.sub.2 --CH.sub.2 NR'''.sub. 2.HCl and {(RO).sub.n R'.sub.3-n SiR''NR'''CH.sub.2 --}.sub.2.2HCl are obtained in which

• R is an alkyl or an alkoxyalkyl radical of from 1 to 4 carbon atoms,
• n is 2 to 3,
• R' is a lower alkyl radical,
• R'' is an alkylene radical of 1 to 4 carbon atoms,
• R''' is hydrogen or an alkyl radical of 1 to 8 carbon atoms R'''being hydrogen or a methyl radical when (2) is a diamine, and
• m is 1 or 2.