Methods for preparing open-celled polyurethane foams, systems for use therein, and open-celled polyurethane foams produced thereby
US10494498B2 · kind B2 · utility
0Cited by
12References
11Claims
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Assignee
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Key dates
| Filing date | Dec 12, 2018 |
| Grant date | Dec 3, 2019 |
| Priority date | — |
| Expiry date | Dec 12, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disclosed are methods and systems for preparing open-celled polyurethane foams by a discontinuous box foam process in which (a) a polyurethane foam-forming composition is deposited into a container having a gas-permeable base and (b) the polyurethane-foam forming composition is allowed to form an open-celled polyurethane foam in the container. In these methods and systems, the gas-permeable base is heated before, during, and/or after step (a) and heating is continued during at least a portion of step (b).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.