Polyurethane gel and production method thereof
US11254791B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | Jul 8, 2016 |
| Grant date | Feb 22, 2022 |
| Priority date | — |
| Expiry date | Jul 8, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2201/56
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
In a polyurethane gel 1 including a gel layer 2 and a coat layer 3 covering the gel layer 2, the gel layer 2 is produced by allowing at least aliphatic polyisocyanate having an average functionality of more than 2.0 to react with polyol having an average functionality of 3.0 or less, and the coat layer 3 is produced by allowing at least aliphatic diisocyanate and/or alicyclic diisocyanate to react with bifunctional active hydrogen compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.