Retarded anionic polymerization of vinyl aromatic monomers using insoluble or heterogeneous retardants
US7351777B2 · kind B2 · utility
12Cited by
4References
19Claims
0Family size
Inventors
Key dates
| Filing date | Mar 29, 2006 |
| Grant date | Apr 1, 2008 |
| Priority date | — |
| Expiry date | Jul 14, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F12/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention is a process to manufacture high quality vinyl aromatic polymer that is essentially free of unreacted vinyl aromatic monomer using retarded anionic polymerization wherein the retardant is insoluble and can be removed from the polymerization at an intermediate stage so that the polymerization can be carried to completion in the absence of the retardant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.