The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 29, 2013
Filed:
Jan. 22, 2009
Valentina Mitina, Tarrytown, NY (US);
Michael Chin, Oakland Gardens, NY (US);
Keqing Fa, Ardsley, NY (US);
Thomas Giesenberg, Oberwil, CH;
Valentina Mitina, Tarrytown, NY (US);
Michael Chin, Oakland Gardens, NY (US);
Keqing Fa, Ardsley, NY (US);
Thomas Giesenberg, Oberwil, CH;
BASF SE, Ludwigshafen, DE;
Abstract
A method is provided for preparing on the surface of a substrate a superhydrophilic layer containing at least one metal oxide which method comprises calcining at elevated temperatures a cross-linked precursor film in which film the metal oxide is evenly distributed and immobilized. The precursor film is prepared by sequentially applying to the surface of the substrate a polyamine or other cationic polymer, a suspension of metal oxide and then a suitable cross linking agent. The superhydrophilic layer can be applied as a coating to a variety of substrates including metal, glass and ceramic and provides excellent dirt resistance, scratch resistance and antifogging effect. Multi-layer systems are also available using the inventive process.