Fluorinated polymers and copolymers containing perfluoropolyethers blocks
US4946936A · kind A · utility
24Cited by
2References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1988 |
| Grant date | Aug 7, 1990 |
| Priority date | — |
| Expiry date | Dec 8, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F283/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
By means of radicalic starters, fluoroolefins are polymerized in the presence of perfluoropolyethers containing, at one or at both ends, a bromine atom, in such amounts that the weight ratio between the perfluoropolyethers and the fluorinated olefins in the resulting product ranges from 4/1 to 1/50. The bromine-containing perfluoropolyethers utilized in the process have a molecular weight from 400 to 10,000, and preferably from 600 to 8,000. The resulting polymeric products comprise sequences of perfluoroolefinic units and perfluoropolyether blocks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.