Compositions and methods of making a thin film and applications thereof
US12195638B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2019 |
| Grant date | Jan 14, 2025 |
| Priority date | — |
| Expiry date | Feb 12, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/755
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
In some embodiments, a film forming composition described herein comprises an aliphatic polyisocyanate; an aliphatic polyfunctional nucleophile; a chain extender; a first solvent; and a second solvent, wherein an evaporation rate of the first solvent and an evaporation rate of the second solvent are within 150% of each other, the percentage being based on the larger value. In some embodiments, a method of forming a film on a substrate is described herein, the method comprising combining a polyisocyanate with a polyol to form a polyurethane pre-polymer; combining the polyurethane pre-polymer with a chain extender to form a polymer; and applying the polymer to the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.