Sequential coupling in formation of resinous block copolymers
US5270396A · kind A · utility
10Cited by
4References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 18, 1992 |
| Grant date | Dec 14, 1993 |
| Priority date | — |
| Expiry date | May 18, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F297/044
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for preparing resinous copolymers by sequential charge copolymerization of at least two charges, at least one being a conjugated diene and at least one being a monovinylarene; followed by a charge of a polyfunctional coupling agent; and the final charge being an essentially difunctional coupling agent. The copolymer made by this method and articles made from this copolymer are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.