Polymerization in the presence of a stable free radical and of a free radical initiator
US6346589B1 · kind B1 · utility
0Cited by
16References
35Claims
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Inventors
Key dates
| Filing date | May 9, 1997 |
| Grant date | Feb 12, 2002 |
| Priority date | — |
| Expiry date | May 9, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F4/38
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a process comprising a stage of polymerization or copolymerization of at least one polymerizable or copolymerizable monomer by a radical mechanism in the presence of a stable free radical and of an initiator of formula:R1—O—O—R2wherein R1 and R2, which can be identical or different, represent an alkyl, aryl, alkylaryl or aralkyl radical comprising, for example, from 1 to 20 carbon atoms. The process is fast, allows the initiator to act more efficiently and results in polymers or copolymers exhibiting a low yellowing index.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.