Novel compositions and process
AssigneeThe Upjohn Company
InventorsWoodrow Carroll, Thomas R. McClellan
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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.
Claims18
A composite panel comprising:
- an inner core layer of scrap plastic in particulate form of a size such that the majority of the particles pass through a 10 U.S. mesh sieve;
- said inner core layer being sandwiched between outer layers of particles of cellulosic material capable of being compacted under pressure;
- said inner and outer layers and the particles in said layers being bonded together using a binder which comprises an organic polyisocyanate.
A composite panel comprising:
- an inner core layer of scrap plastic in particulate form of a size such that the majority of the particles pass through a 10 U.S. mesh sieve;
- said inner core layer being sandwiched between outer layers of wood particles;
- said inner and outer layers and the particles in said layers being bonded together using an organic polyisocyanate binder.
Dependencies are inferred from the claim text.