Viscoelastic foam with slow recovery time
US12060506B2 · kind B2 · utility
0Cited by
5References
14Claims
0Family size
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Key dates
| Filing date | Mar 8, 2019 |
| Grant date | Aug 13, 2024 |
| Priority date | — |
| Expiry date | Dec 1, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J2475/006
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Recovery times of flexible polyurethane foams are increased by treatment with a pressure sensitive adhesive. An emulsion or dispersion of the adhesive in an aqueous carrier liquid is impregnated into the foam, with subsequent removal of the carrier. This invention is of special interest when the glass transition temperature of the starting foam is 16° C. or lower.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.