Photometer-controlled anionic polymerization
US4396741A · kind A · utility
1Cited by
8References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 30, 1982 |
| Grant date | Aug 2, 1983 |
| Priority date | — |
| Expiry date | Mar 30, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F236/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Random monoalkenyl arene-conjugated diene copolymers are produced by controlling the continuous rate of addition of the conjugated diene monomer to a reactor containing the monoalkenyl arene monomer, organolithium initiator and solvent, the rate being adjusted in response to the photometer measured presence of an active chromophore comprising a lithium ion directly associated with a poly(monoalkenyl arene) carbanion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.