Continuous production of high impact polystyrene
US4777210A · kind A · utility
42Cited by
13References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 25, 1986 |
| Grant date | Oct 11, 1988 |
| Priority date | — |
| Expiry date | Jul 25, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F279/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a continuous flow process for producing polystyrene having discrete particles of rubber included therein. The process utilizes a pre-inversion reactor, in which a solution of styrene, polystyrene and rubber are mixed prior to being introduced into a second stirred tank reactor. The viscosity of the solutions in the pre-inversion reactor and in the second stirred tank reactor are closely controlled to produce desirable HIPS products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.