Biodegradable omniphobic coated articles and method for making
US11155732B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2019 |
| Grant date | Oct 26, 2021 |
| Priority date | — |
| Expiry date | Aug 21, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The disclosure relates to omniphobic coatings, related articles including such coatings, and related method for forming such coatings or articles, for example biobased and/or biodegradable omniphobic coatings. The omniphobic coating includes a reaction product between an amino-functional polymer and an amino-reactive functionalized omniphobic polymer having a glass transition temperature (Tg) of 60° C. or less. The omniphobic coating has a weight ratio of amino-functional polymer relative to functionalized omniphobic polymer of at least 1 or 2. A corresponding omniphobic coated article can include the omniphobic coating on a porous substrate such as a cellulosic or paper substrate, for example to provide a water- and oil/fat/grease-resistant coating for a paper-based product. The omniphobic coating can be formed in a reaction medium before being applied to the substrate, or the omniphobic coating can be formed on the substrate with serial application of the amino-reactive functionalized omniphobic polymer and the amino-functional polymer thereon. This disclosure provides a closed loop circular economy approach for fluorine-free, water- and grease-resistant paper as the coating can …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.