Metal oxide particles with uniform multilayer polymer coatings
US9796793B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 5, 2014 |
| Grant date | Oct 24, 2017 |
| Priority date | — |
| Expiry date | Mar 30, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.