The agent in order to influence the rheological properties of the bitumen and of the masses bituminous

摘要

In this process, the rheological properties of bitumen and bituminous compositions are modified by adding compounds of the formula IMAGE in which R1 is H, an aliphatic hydrocarbon radical having up to 8 carbon atoms, or a COOH or NH2 radical, R2 is an aromatic or cylcoaliphatic carbon radical, R3 is a divalent aliphatic hydrocarbon radical having 2 to 4 carbon atoms, R4 is H, an aliphatic hydrocarbon radical having up to 4 carbon atoms, an -R5NH2 radical or an -R5-NH-CO-R2-R1 radical, where R5 is a divalent aliphatic hydrocarbon radical having 2 to 4 carbon atoms, x is 0 or 1. The compounds, for example N-(1-aminoethylpiperazino)-p-tert-butylbenzomide, N,N-(1,4-bis-(3-aminopropyl)piperazino)-4-n-butylcyclohexanecarbox-ami de and N-(4-methylpiperazino)methylhexahydrophthalamide, are added to the starting composition in an amount of 0.1 to 5 % by weight. The additives for achieving certain rheological properties can be determined for selected starting compositions by experiments.