Single-pot process for the production of polyester-co-carbonate polyols
US9181391B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Feb 4, 2013 |
| Grant date | Nov 10, 2015 |
| Priority date | — |
| Expiry date | Feb 4, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/64
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyester-co-carbonate polyols and methods for producing the same are provided. The method comprises reacting one or more alcohols having an OH functionality of two or more with one or more organic diacids to form a reaction mixture, adding a first amount of dialkyl carbonate to the reaction mixture to remove water remaining from the reaction mixture by azeotropic drying, adding a transesterification catalyst to the dialkyl carbonate containing reaction mixture and adding a second amount of dialkyl carbonate to the catalyst containing reaction mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.