Perfluoroalkylsulphonamidoalkoxysilanes
AssigneeBayer Aktiengesellschaft
InventorsStephan Kirchmeyer, Martin Richter
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Abstract
Novel perfluoroalkylsulphonamidoalkoxysilanes suitable as hydrophobing and oleophobing agents for textiles and stone materials of the formula ##STR1## wherein R.sup.f represents a monovalent perfluoroalkyl group with 4 to 20 carbon atoms, R represents a monovalent organic group which is inert towards isocyanate groups at temperatures below 100.degree. C., X,Y and Z represent identical or different organic groups which are inert towards isocyanate groups at temperatures below 100.degree. C., with the proviso that at least one of these groups is an alkoxy group, a is 1 or 2, b is 0 or 1, c is 3-a-b, but at least 1, and n is an integer from 2 to 4. and a process for their preparation.
Claims4
A fluorine-containing silane of the formula ##STR7## wherein R.sup.f represents a monovalent perfluoroalkyl group with 4 to 20 carbon atoms,
- R represents a monovalent organic group which is inert towards isocyanate groups at temperatures below 100.degree. C.,
- X, Y and Z represent identical or different organic groups which are inert towards isocyanate groups at temperatures below 100.degree. C., with the proviso that at leat one of these groups is an alkoxy group,
- a is 1 or 2,
- b is 0 or 1,
- c is 3-a-b, but at least 1, and
- n is an integer between 2 and 4.
Dependencies are inferred from the claim text.