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:
Jul. 17, 2007
Filed:
May. 03, 2005
Ronald Lee Cook, Lakewood, CO (US);
Silvia Devito Luebben, Golden, CO (US);
Andrew William Myers, Arvada, CO (US);
Bryan Matthew Smith, Boulder, CO (US);
Brian John Elliott, Superior, CO (US);
Cory Kreutzer, Brighton, CO (US);
Carolina Wilson, Arvada, CO (US);
Manfred Meiser, Aurora, CO (US);
Ronald Lee Cook, Lakewood, CO (US);
Silvia DeVito Luebben, Golden, CO (US);
Andrew William Myers, Arvada, CO (US);
Bryan Matthew Smith, Boulder, CO (US);
Brian John Elliott, Superior, CO (US);
Cory Kreutzer, Brighton, CO (US);
Carolina Wilson, Arvada, CO (US);
Manfred Meiser, Aurora, CO (US);
TDA Research, Inc., Wheat Ridge, CO (US);
Abstract
Surface-modified nanoparticles of boehmite, and methods for preparing the same. Aluminum oxyhydroxide nanoparticles are surface modified by reaction with selected amounts of organic acids. In particular, the nanoparticle surface is modified by reactions with two or more different carboxylic acids, at least one of which is an organic carboxylic acid. The product is a surface modified boehmite nanoparticle that has an inorganic aluminum oxyhydroxide core, or part aluminum oxyhydroxide core and a surface-bonded organic shell. Organic carboxylic acids of this invention contain at least one carboxylic acid group and one carbon-hydrogen bond. One embodiment of this invention provides boehmite nanoparticles that have been surface modified with two or more acids one of which additional carries at least one reactive functional group. Another embodiment of this invention provides boehmite nanoparticles that have been surface modified with multiple acids one of which has molecular weight or average molecular weight greater than or equal to 500 Daltons. Yet, another embodiment of this invention provides boehmite nanoparticles that are surface modified with two or more acids one of which is hydrophobic in nature and has solubility in water of less than 15 by weight. The products of the methods of this invention have specific useful properties when used in mixture with liquids, as filler in solids, or as stand-alone entities.