Barrier coating of a mixture of cured and uncured elastomeric polymers and a dispersed layered filler in a liquid carrier and coated articles
US7119138B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2003 |
| Grant date | Oct 10, 2006 |
| Priority date | — |
| Expiry date | Dec 13, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K9/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Barrier coating mixtures include (a) a mixture of pre-vulcanized and non-vulcanized elastomeric polymers; (b) an acid or base treated dispersed, substantially exfoliated silicate filler material that has not been functionalized with organic cations having an aspect ratio greater than 25; and (c) at least one additive, wherein the total solids content is less than 30% and the amount of filler is between 5% to about 60% of the total solids content. The coating retains its permeability properties under strain and has a strain to first damage of at least 10% biaxial elongation at 0% RH.Coated articles, free standing films and membranes, which are flexible and elastomeric, are produced using the barrier coating mixtures. Methods of manufacturing of such coated products are also encompassed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.