Method for improving the melt flow rate of polystyrene
US4782134A · kind A · utility
0Cited by
16References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1986 |
| Grant date | Nov 1, 1988 |
| Priority date | — |
| Expiry date | Oct 20, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F6/26
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The specification discloses a method for assuring consistent and, if desired, increased melt flow rate in a vinyl aromatic based polymer by controlling the degree of absorption of carbon dioxide, oxygen and/or argon for a substantial period of time immediately prior to introduction of the polymer into a molding machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.