Filled-polystyrene laminates
US4101050A · kind A · utility
56Cited by
8References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1976 |
| Grant date | Jul 18, 1978 |
| Priority date | — |
| Expiry date | Sep 14, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31924
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Thermoplastic polystyrene laminates are disclosed, one of the layers of which comprises a filled polystyrene composition containing from about 5 to about 50 of filler, such as calcium carbonate, clay, asbestos, etc. The filled polystyrene composition is prepared from a filled polystyrene masterbatch of impact polystyrene, filler, rubber and mineral oil, cut back by mixing with other polystyrene, either crystal or impact polystyrene. Laminates may be prepared by coextrusion. The filled polystyrene layer may be foamed. The laminates may be used for making formed articles such as cups, containers, trays, plates, sheets, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.