Process for preparation of diene-styrene-.alpha.-methylstyrene block polymers and polymers therefrom
US4427837A · kind A · utility
13Cited by
5References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1981 |
| Grant date | Jan 24, 1984 |
| Priority date | — |
| Expiry date | Aug 28, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F297/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Diene-styrene-.alpha.-methylstyrene block polymers are prepared by polymerization in excess .alpha.-methylstyrene with a lithium initiator wherein styrene-.alpha.-methylstyrene block is polymerized at a temperature from about 20.degree. centigrade to about 160.degree. centigrade with the ratio of styrene to .alpha.-methylstyrene being from about 50 to 1 to about 1 to 50.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.