Biobased aqueous polyurethane dispersions
US11530332B1 · kind B1 · utility
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Key dates
| Filing date | Jul 12, 2022 |
| Grant date | Dec 20, 2022 |
| Priority date | — |
| Expiry date | Jul 12, 2042 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06N2211/28
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An aqueous polyurethane dispersion includes particles of polyurethane in water, wherein the polyurethane is derived from an organic diisocyanate, a hydrophilic monomer, a neutralizer, a chain extender, and a polyester resin, the polyester resin being a random copolymer having randomly distributed subunits of formula 1: where: R is ethylene, octylene, or decylene, a is from about 40 to about 100 mole % of the polyester resin, b is from 0 to about 30 mole % of the polyester resin, c is from 0 to about 30 mole % of the polyester resin, and a+b+c=100 mole % of the polyester resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.