Polyurethane urea-containing adipic acid dihydrazide coating where active hydrogens react with the glycidol epoxy group to form a diol
US11421129B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 4, 2020 |
| Grant date | Aug 23, 2022 |
| Priority date | — |
| Expiry date | Dec 4, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/7671
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A coating composition containing added diol functionality to a urethane, a urea, or polyurethane urea functional resin where an adipic acid dihydrazide chain extender, or free adipic acid dihydrazide active hydrogens react with the oxirane group found in glycidol is described. The combination of diisocyanate, a polyether segment, optionally at least one polyester diol segment, optionally at least one poly(tetrahydrofuran) diol segment, optionally and at least one dimethylol propionic acid diol segment, at least one dihydrazide segment and glycidol compound introduces an increased hydrophilic structure, by diol addition, in compositions that are usable as coatings, on for example, medical devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.