Preparation of branched polymers from vinyl aromatic monomer
US5700887A · kind A · utility
10Cited by
5References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 2, 1996 |
| Grant date | Dec 23, 1997 |
| Priority date | — |
| Expiry date | Feb 2, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F297/023
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for producing a branched polymer from a vinyl aromatic monomer comprising: PA1 A) contacting a vinyl aromatic monomer with a difunctional anionic initiator under conditions such that a dianion macromer is formed, PA1 B) contacting the dianion macromer with a multifunctional coupling agent having at least 3 reactive sites under polymerization conditions such that branches form during polymerization, and PA1 C) contacting the product of step B with a terminating agent under conditions such that the reactive sites are terminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.