Use of polysilazane for the production of hydrophobically and oleophobically modified surfaces
AssigneeClariant Produkte (Deutschland) GmbH
InventorsUwe Falk, Hendrik Ahrens
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Abstract
The invention relates to the use of a polysilazane solution which comprises a polysilazane of the formula 1 where n has been adjusted so that the polysilazane has a number-average molar mass of from 150 to 150 000 g/mol, and also comprises a solvent and a catalyst, as a primer for the coating of a surface with fluorosilanes or with fluorine-containing condensates.
Claims8
A process for coating a surface with fluorosilanes or fluorosilane containing condensates, said process comprising
- a) in a first step disposing on said surface a polysilazane solution which comprises a polysilazane of the formula 1
- where n has been adjusted so that the polysilazane has a number-average molar mass of from 150 to 150 000 g/mol, and a solvent and a catalyst,
- b) in a second step disposing on said surface fluorosilanes or fluorosilane containing condensates to provide a coated surface.
A process for producing a surface coated with fluorosilanes or with fluorosilane-containing condensates, by, in a first step, bringing the uncoated surface into contact with a composition which comprises a polysilazane of the formula 1,
- where n has been adjusted so that the polysilazane has a number-average molar mass of from 150 to 150 000 g/mol, a solvent and a catalyst, and then, in a second step, bringing the surface obtained in the first step in contact with a fluorosilane compound or fluorosilane-containing condensate, and curing the composition to provide said coated surface.
Dependencies are inferred from the claim text.