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:
May. 13, 2025
Filed:
Oct. 01, 2020
The Regents of the University of California, Oakland, CA (US);
Dow Global Technologies Llc, Midland, MI (US);
Rohm and Haas Company, Collegeville, PA (US);
David G. Barton, Midland, MI (US);
James C. Bohling, Collegeville, PA (US);
Juan F. Callejas, Collegeville, PA (US);
Amrita Chakravarty, Berkeley, CA (US);
Alexander Katz, Richmond, CA (US);
Manish K. Mishra, Berkeley, CA (US);
Clayton J. Radke, El Cerrito, CA (US);
Antony K. Van Dyk, Blue Bell, PA (US);
The Regents of the University of California, Oakland, CA (US);
Dow Global Technologies LLC, Midland, MI (US);
Rohm and Haas Company, Collegeville, PA (US);
Abstract
The present invention is a composition comprising an aqueous dispersion of metal oxide pigment particles coated with an organosilane polymer comprising structural units of an alkyltrihydroxysilane or a salt thereof, a dialkyldihydroxysilane or a salt thereof, and an ancillary alkylsilane triol. The composition of the present invention provides hydrophobicity to pigment particles, thereby imparting water resistance, and allows for high loadings of pigment in water without increased viscosity. The dispersion is further useful for providing stain and corrosion resistance in coatings arising from paints.