Process for producing polystyrene foam
US5342857A · kind A · utility
12Cited by
7References
7Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jan 18, 1994 |
| Grant date | Aug 30, 1994 |
| Priority date | — |
| Expiry date | Jan 18, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2325/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a process to produce polystyrene foam comprising mixing a predetermined amount of masterbatch mix and a styrenic polymer, heating this mixture, injecting CO.sub.2 and/or nitrogen, in gas or liquid form, as a blowing agent and subsequently extruding, cooling and drying the resulting polystyrene foam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.