Programmed addition of heavy ethers for microstructure control of diene polymers
US5795944A · kind A · utility
5Cited by
2References
5Claims
0Family size
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Key dates
| Filing date | Mar 12, 1997 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Mar 12, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F297/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the polymerization of dienes which comprises anionically polymerizing dienes in the presence of an anionic polymerization initiator and a microstructure control agent is improved by adding the control agent to the polymerization mixture in two or more doses to closely control the vinyl content of the polymer produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.