Tertiary amines, a process for their preparation and their use as hardening accelerators

A compound having the formula ##STR5## wherein R.sup.1 represents an alkyl or cycloalkyl group having 1 to 6 carbon atoms, optionally substituted with inert substituents,

• R.sup.2 and R.sup.3 independently represent hydrogen, alkyl or cycloalkyl groups having 1 to 6 carbon atoms, or halogen atoms,
• R.sup.4 and R.sup.5 each represent methyl groups or, together with the carbon atom located between the aromatic rings, form a cyclohexane group, optionally substituted with inert substituents,
• R.sup.6 and R.sup.7 independently, represent hydrogen, alkyl or cycloalkyl groups having 1 to 6 carbon atoms, optionally substituted with inert substituents, or halogen atoms,
• m represents an integer or (as a statistical average) a fractional number from 1 to 3, and
• n represents an integer or (as a statistical average) a fractional number from 0 to 2,
• with the proviso that when m is greater than 1 and n is at least 1, the bracketed segments taken together represent a block copolymer, an alternating copolymer, or a random copolymer, and
• with the further proviso that if n is 0, then R.sup.1 is an ethyl group and either R.sup.2 is a methyl group and R.sup.3 is hydrogen or R.sup.2 is hydrogen and R.sup.3 is a methyl group.