Andrew F Myers

US Patent:

6887517, May 3, 2005

Filed:

Jun 12, 2002

Appl. No.:

10/171422

Inventors:

Ronald Lee Cook - Lakewood CO, US
Brian John Elliott - Superior CO, US
Silvia DeVito Luebben - Golden CO, US
Andrew William Myers - Arvada CO, US
Bryan Matthew Smith - Boulder CO, US

Assignee:

TDA Research - Wheat Ridge CO

International Classification:

B05D001/36
B32B001/00

US Classification:

427214, 427215, 427220, 428402, 428403, 428404, 428407

Abstract:

A new class of surface modified particles and a multi-step Michael-type addition surface modification process for the preparation of the same is provided. The multi-step Michael-type addition surface modification process involves two or more reactions to compatibilize particles with various host systems and/or to provide the particles with particular chemical reactivities. The initial step comprises the attachment of a small organic compound to the surface of the inorganic particle. The subsequent steps attach additional compounds to the previously attached organic compounds through reactive organic linking groups. Specifically, these reactive groups are activated carbon—carbon pi bonds and carbon and non-carbon nucleophiles that react via Michael or Michael-type additions.

US Patent:

6986943, Jan 17, 2006

Filed:

Jun 12, 2002

Appl. No.:

10/171402

Inventors:

Ronald Lee Cook - Lakewood CO, US
Brian John Elliott - Superior CO, US
Silvia DeVito Luebben - Golden CO, US
Andrew William Myers - Arvada CO, US
Bryan Matthew Smith - Boulder CO, US

Assignee:

TDA Research, Inc. - Wheat Ridge CO

International Classification:

B05D 1/36
B32B 1/00

US Classification:

428402, 428403, 428404, 427214, 427215

Abstract:

The present invention relates to a new class of surface modified particles and to a multi-step surface modification process for the preparation of the same. The multi-step surface functionalization process involves two or more reactions to produce particles that are compatible with various host systems and/or to provide the particles with particular chemical reactivities. The initial step comprises the attachment of a small organic compound to the surface of the inorganic particle. The subsequent steps attach additional compounds to the previously attached organic compounds through organic linking groups.

US Patent:

7244498, Jul 17, 2007

Filed:

May 3, 2005

Appl. No.:

11/120650

Inventors:

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

Assignee:

TDA Research, Inc. - Wheat Ridge CO

International Classification:

B32B 5/66

US Classification:

428402, 428403, 428404, 428405, 428407, 427214, 427215, 427220, 556179

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.