Polysiloxanes with quaternary ammonium groups, preparation thereof and use thereof as textile softeners
View Patent ↗Polysiloxanes of formula (I) [M′ D n ] 3 T (I), where M′=QSiY 2 O 1/2 D=SiY 2 O 2/2 T=SiZO 3/2 are useful as softeners for wovens, nonwovens and/or fibers composed of natural and/or synthetic raw materials.
1. A process for preparing a polysiloxane of the general formula
[M′ D n ] 3 T (I),
where
M′=QSiY 2 O 1/2
D=SiY 2 O 2/2
T=SiZO 3/2
Q=identical or different organic radicals bearing ammonium functions,
Y=identical or different radicals from the group consisting of alkyl, aryl or alkaryl having 1 to 30 carbon atoms, preferably methyl or phenyl, in particular methyl,
Z=identical or different radicals from the group consisting of alkyl, aryl or alkaryl having 1 to 30 carbon atoms, preferably methyl or phenyl, in particular phenyl,
n=5 to 250,
which comprises applying conventional conditions to equilibrate phenyltris(dimethylsiloxy)silane with cyclic siloxanes in a first stage and
subsequently to hydrosilylate these in a second stage with epoxides comprising double bonds and
to react the epoxysilanes thus obtained with tertiary amines in a third stage to give the corresponding ammonio-bearing siloxanes.
2. A formulation comprising 5% to 50% by weight of the polysiloxanes prepared according to claim 1 .