Novel compositions and process
US4382108A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1981 |
| Grant date | May 3, 1983 |
| Priority date | — |
| Expiry date | Dec 21, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31591
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Composite panels are disclosed which comprise outer layers derived from cellulosic and like material conventionally employed in particle boards and an inner layer which is comminuted scrap plastic material, the various layers and the particles in them being bonded together using an organic polyisocyanate binder. Optionally the binder contains an internal release agent. The composites, in addition to representing a valuable way in which to utilize scrap plastic, also possess improved properties compared with the corresponding panels which lack the inner core. In a particular embodiment the scrap plastic used is derived from junked automobiles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.