Compositions comprising polysiloxanes and further polymers
View Patent ↗Aqueous dispersions comprising polyorganosiloxanes having relatively long alkyl groups and having aromatic groups and also polymers having perfluoroalkyl groups or fluorine-free polyurethanes are useful for treating textile fabrics.
1. A composition comprising the following components:
A) a dispersant or a mixture of dispersants,
B) an unbranched polyorganosiloxane which contains no epoxy groups and no olefinic carbon-carbon double bonds and no carbon-carbon triple bonds, which is terminated, at both ends of the polysiloxane chain, by units of the formula
R 3 Si—O—
and which contains, within the polysiloxane chain, units of the formulae (I), (II) and optionally (III)
—SiRR 1 —O— (I)
—SiRR 2 —O— (II)
—SiR 2 —O— (III)
which units of the formulae (I) to (III) may be randomly distributed along the chain,
where each R radical is independently of the other R radicals a branched or unbranched alkyl radical of 1 to 4 carbon atoms,
each R 1 radical is independently of the other R 1 radicals a branched or unbranched alkyl radical of 6 to 24 carbon atoms,
and each R 2 radical is independently of the other R 2 radicals a radical of the formula (IV)
—R 3 -Ph (IV)
where R 3 is a divalent branched or unbranched alkylene radical of 2 to 6 carbon atoms and Ph is an unsubstituted phenyl radical or is a phenyl radical substituted by one or more branched or unbranched alkyl groups of 1 to 4 carbon atoms, and
C) a polymer selected from the group consisting of polymers containing perfluoroalkyl (R F ) groups (component C1) and fluorine-free polyurethanes (component C2).
2. A composition according to claim 1 , characterized in that each R in component B) is methyl.
3. A composition according to claim 1 , characterized in that each R 1 radical in component B) is independently of other R 1 radicals an unbranched alkyl radical of 10 to 18 carbon atoms.
4. A composition according to claim 1 , characterized in that each R 2 radical in component B) is
—CH 2 —CHR 4 -Ph
where R 4 is hydrogen or a methyl group and Ph is unsubstituted phenyl.
5. A composition according to claim 1 , characterized in that, in component B), the number of units of the formula (II) is 4 to 30% of the number of units of the formula (I) and the number of units of the formula (III) is 0 to 5 000% of the number of units of the formula (I).
6. A composition according to claim 1 , characterized in that component B) contains 20 to 1 000 silicon atoms.
7. A composition according to claim 1 , characterized in that it comprises 0.5 to 10% by weight of component A), 0.5 to 30% by weight of component B), 3 to 30% by weight of component C) and 30 to 96% by weight of water.
8. A composition according to claim 1 , characterized in that component A) consists exclusively of nonionic compounds.
9. A composition according to claim 1 , characterized in that component C) comprises either only one or more of components C1) or only one or more components C2).
10. A composition according to claim 1 , characterized in that component C1) is a polyester, a polyurethane or a polyacrylate which contains R F groups.
11. A composition according to claim 1 , characterized in that C2) is a polyester urethane.
12. composition according to claim 1 , characterized in that it is an aqueous dispersion.
13. A method of treating fiber materials which comprises applying a dispersion according to claim 12 thereto.
14. The method according to claim 13 , characterized in that the fiber materials are textile fabrics in the form of wovens or knits.