Use of sequential polyperoxides to produce polystyrene with high grafting
US6703460B1 · kind B1 · utility
2Cited by
6References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2003 |
| Grant date | Mar 9, 2004 |
| Priority date | — |
| Expiry date | Mar 4, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F279/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
It has been discovered that sequential polyperoxides can be beneficially used as initiators for vinylaromatic/diene copolymers to give high grafting values and reasonable molecular weights. A new cyclic diperoxide did not give these same results. The sequential polyperoxide initiators can be used as the only initiators or together with other conventional peroxide initiators to advantage. The polymerization rate can also be increased using these sequential polyperoxide initiators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.