Organopolysiloxanes with polyether and ester groups linked to a common spacer group

An organopolysiloxane having polyether and ester groups linked to a common spacer group, wherein the spacer group is linked to the siloxane backbone through an SiC bond and the organopolysiloxane has the formula ##STR25## wherein R.sup.1 groups are the same or different and in each case represent alkyl groups with 1 to 4 carbon atoms or phenyl groups, with the proviso that at least 90% of the R.sup.1 groups are methyl groups,

• R.sup.2 is selected from the group consisting of R.sup.1 group, R.sup.3 --R.sup.4 group, an alkyl group with 2 to 30 carbon atoms and a hydrogen group, wherein the ratio of R.sup.3 --R.sup.4 group to the sum of alkyl group with 2 to 30 carbon atoms and hydrogen group is 70:30 to 100:0, in which
• R.sup.3 is a divalent hydrocarbon group, the carbon chain of which is selected from the group consisting of a carbon chain, a carbon chain interrupted by an oxygen atom and a carbon chain with a carbonyl group and
• R.sup.4 is one of the following groups:
• ##STR26## in which R.sup.5 is the acyl group of a monocarboxylic acid with 1 to 20 carbon atoms,
• R.sup.6 is a polyether group and
• R.sup.7 is a hydrogen or methyl group and
• a has a value of 1 to 1,000 and
• b has a value of 0 to 10,
• with the proviso that, in the average molecule, at least one R.sup.2 group is a group having the formula R.sup.3 --R.sup.4.