Process for manufacturing polycarbonate from derivatives of dianhydrohexitols bearing two alkyl carbonate functions
US8871895B2 · kind B2 · utility
1Cited by
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15Claims
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Key dates
| Filing date | Apr 5, 2012 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Apr 5, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/1608
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for manufacturing polycarbonate includes:—a step (1) of introducing into a reactor a particular composition (A) of at least one dianhydrohexitol carbonate bearing two alkyl carbonate functions; a step (2) of introducing a diol or a mixture of diols (B); a subsequent step (3) of polycondensation by transesterification of the mixture of monomers including (A) and (B); a step (4) of recovering the polycarbonate formed during step (3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.