Polymerization of fluoroolefins in presence of non-volatile polymeric seed
US5019632A · kind A · utility
3Cited by
10References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1989 |
| Grant date | May 28, 1991 |
| Priority date | — |
| Expiry date | Aug 28, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/919
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A free-radical initiated process for preparing fluorinated polymers wherein at least one gaseous fluoroolefin is polymerized in a stirred polymerizer, the improvement comprising preparing a non-volatile polymeric seed in a reaction zone separate from the polymerizer by decomposing initiator in the presence of fluoromonomer to form oligomeric free radicals and condensing said radicals onto previously prepared polymer; and conveying said non-volatile seed to the polymerizer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.