University of California

Dow Global Technolgoies LLC

Rohm and Haas Company

Centre National De La Recherche Scientifique

University of Michigan

Joseph Jankolovits

James Charles Bohling

Alexander S Katz

John Anderson Roper, Iii

Oz M Gazit

Antony Keith Van Dyk

Svetlana V Eliseeva

Ivana Martinic

Vincent L Pecoraro

Clayton J Radke

Stephane Petoud

Evan R Trivedi

Alexandra Foucault-Collet

John A Roper Iii

John A Iii Roper

The present invention is a multilayered composite comprising porous metal oxide particles that are covalently bonded by way of inorganic ether groups to one or more sites of a first polyhydroxyl-functionalized polymer. This first polymer is in turn covalently bonded by way of inorganic ether groups to one or more sites of a second polyhydroxyl-functionalized polymer. The multilayered composites can be prepared by contacting porous inorganic-oxide particles with a sufficient amount of OH-reactive crosslinking agent to form metal oxide particles imbibed with the crosslinking agent, and then contacting the inorganic-oxide particles with a solution of polyhydroxyl-functionalized polymer under reactive conditions.

Metal oxide particles with uniform multi-layer polymer coatings

A metallacrown complex has the formula: Ln(III)[12-MC-4]2[24-MC-8], wherein MC is a metallacrown macrocycle with a repeating sub-unit consisting of a transition metal (M(II)) and a hydroxamic acid (HA) ligand that produces a ligand-based charge transfer state when incorporated into the metallacrown complex. In an example of a method for making the metallacrown complex, a hydroxamic acid (HA) ligand that is to produce a ligand-based charge transfer state when incorporated into the metallacrown complex, a transition metal salt, and a rare-earth salt are dissolved in a solvent to form a solution. A base is added to the solution. The solution is stirred at a predetermined temperature for a predetermined time. The solution is exposed to a purification method to produce crystals of the metallacrown complex.

Metallacrown complexes and methods of making the same

The present invention relates to a composition comprising a) a stable aqueous dispersion of inorganic pigment particles hydrophobically modified with covalently bonded polysiloxane or silyl groups; and b) a polymeric anionic dispersant; wherein the hydrophobically modified inorganic pigment particles have an average particle size in the range of from 200 nm to 10 &#x3bc;m, and the solids content of the hydrophobically modified inorganic pigment particles is from 10 to 80 weight percent, based on the weight of inorganic pigment particles and water. The composition of the present invention provides a way to improve water resistance in coatings formulations.

Aqueous dispersion of hydrophobically modified pigment particles

Metal oxide particles with uniform multilayer polymer coatings

Growing community of inventors

Berkeley, CA, United States of America

Joseph Jankolovits