Iodination process
US6573410B2 · kind B2 · utility
7Cited by
1References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 9, 2002 |
| Grant date | Jun 3, 2003 |
| Priority date | — |
| Expiry date | May 9, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/323
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A synthetic process of perfluoropolyether iodides, by reaction with LiI of monoacyl- or diacyl-halides of perfluoropolyethers, having number average molecular weight from 200 to 3,000, and having the following structure:XCO—CF2O[(CF2O)n(CF2CF2O)m]pCF2—Q  (II)wherein:m/n=0.5-10; p=0-20;X=Cl, F;Q=H, CF3, X as above defined or COX′, wherein X′ is Cl, F with the proviso that X′=X;said process being characterized in that the iodination reaction is carried out operating at a temperature from 180° C. to 260° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.