Process for treating smectite clays to facilitate exfoliation
US6730719B2 · kind B2 · utility
19Cited by
187References
88Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 4, 2001 |
| Grant date | May 4, 2004 |
| Priority date | — |
| Expiry date | Jun 9, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K9/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
In the method for preparing a nanocomposite by intercalating a smectite clay with a quaternary ammonium ion, and exfoliating the intercalated clay into a polymer matrix; an improvement is disclosed which augments exfoliation. The smectite clay is edge treated with negatively charged organic molecules prior to the exfoliation. For these purposes a high charge density anionic polymer such as a polyacrylate may be used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.