Super absorbent polymer recycling to pressure sensitive adhesives
US11781045B2 · kind B2 · utility
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2References
19Claims
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Assignee
Inventors
Key dates
| Filing date | Aug 24, 2020 |
| Grant date | Oct 10, 2023 |
| Priority date | — |
| Expiry date | Feb 13, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Methods for upcycling crosslinked sodium polyacrylate to pressure sensitive adhesives via (a) mechanochemical chain-shortening and esterification or (b) esterifying with high conversion with a Fischer esterification process are disclosed. Also disclosed is a pressure sensitive adhesive prepared by the disclosed methods and articles comprising the pressure sensitive adhesive, including, but not limited to, pressure sensitive tape, a bandage, a label, note pads, a decal, a stamp, an envelope, a sticker, packaging, automobile trim, and a film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.