Process for the alkoxylation of (per) fluoropolyether alcohols
US9334213B2 · kind B2 · utility
4Cited by
14References
18Claims
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Key dates
| Filing date | Dec 4, 2013 |
| Grant date | May 10, 2016 |
| Priority date | — |
| Expiry date | Dec 4, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2650/48
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A convenient process for the manufacture of alkoxylated derivatives of PFPE alcohols is herein provided. The process envisages the use of a boron-based catalyst and an iodine source and is characterized in that a PFPE alkoxide is prepared separately, contacted with a boric acid triester of the same PFPE alcohol and finally submitted to alkoxylation in the presence of an iodine source. The process allows achieving an alkoxylation degree of at least 2 with high yields and under conditions that are convenient on an industrial scale.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.