Oligocarbonate polyols obtained from dianhydrohexitol dialkylcarbonate or a dimer of dianhydrohexitol carbonate, method for the production thereof and uses thereof
US11299585B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2018 |
| Grant date | Apr 12, 2022 |
| Priority date | — |
| Expiry date | Dec 12, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/403
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Provided is a method for producing an oligocarbonate polyol devoid of aromatic groups and phenolic functions, comprising a step of polycondensation by transesterification of monomers (A1) and/or dimers (A2) and of diol monomers (B1) and/or of triol monomers (B2), in a particular molar ratio, in order to obtain an oligocarbonate polyol having a molar mass of less than 5000 g/mol and at least two hydroxyl-type chain ends, the monomer (A1) corresponding to the following formula: (A1) and the dimer (A2) corresponding to the following formula: (A2) as well as the oligocarbonate polyol that can be obtained by this method and the polycarbonate that can be obtained by reacting this oligocarbonate with a polyisocyanate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.