Modified styrenic resins through hydrogenation
US12344698B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Jul 13, 2023 |
| Grant date | Jul 1, 2025 |
| Priority date | — |
| Expiry date | Jul 13, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F112/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Methods for the hydrogenation of aromatic-containing polymers are described. A method includes hydrogenation of polymers by contacting a polymer solution that includes an aromatic-containing polymer and a mixture of a non-polar solvent and a polar solvent having a dielectric constant greater than 7.6 at 25° C. and a non-polar solvent having a dielectric constant of 5 or less at 25° C. with a hydrogenation catalyst to produce polymer composition that includes at least one hydrogenated and/or at least one partially hydrogenated aromatic ring. The polar to non-polar solvent volume ratio ranges from 10:90 to 80:20.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.