Anti-static modified thermoplastics

An antistatic mixture of a thermoplastic, comprising (a) a thermoplastic and (b) 0.01 to 5% by weight, relative to the plastic, of one of the substances of formula I or mixtures thereof, said formula being as follows:

• ##EQU16## wherein R' denotes a hydrogen atom and/or the methyl group, Y denotes ##EQU17##
• and/or ##EQU18## a denotes, as an average value, a number between 1.0 and 12, n denotes, as an average value, a number from 0.5 to 8, R denotes a linear or branched alkyl radical having 8 to 24 carbon atoms, which can preferably be interrupted once by the group --O-- or --S--, or denotes phenyl, phenyl substituted by linear or branched alkyl groups, or phenylalkylene having 1 to 3 carbon atoms in the alkylene chain, it being possible for the alkylene chain or the linkage thereof to the phenyl group to be interrupted by a an oxygen or sulphur atom, and for the phenyl radical thereof also to be substituted by linear or branched alkyl groups, and in all cases the whole radical contains 7 to 30 carbon atoms, it being possible, for the case where R' is the methyl group, for R also to denote a linear or branched alkyl group having 1 to 7 carbon atoms, and in all cases of R the sum of the carbon atoms of R and of the radical ##EQU19## in formula I being 8 to 40.