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US 6,060,584 AGranted
Process for the degradation of polyolefins
AssigneeEastman Chemical Company
InventorsBrenda Linette Neely, James Houston Scott
Life of this patent
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Abstract
A novel process for the production of degraded polyolefin is described. The process involves introducing polyolefin into one end of a vented multi-screw extruder, in the substantial absence of free radical initiator and oxidizing agent, and removing degraded polyolefin from the opposite end of the extruder.
Claims18
A process for the degradation of polyolefin selected from the group consisting of polypropylene and a copolymer or terpolymer of propylene with at least one monomer copolymerizable therewith comprising:
- (a) introducing the selected polyolefin into one end of a multi-screw extruder,
- (b) degrading the polyolefin, in the substantial absence of free radical initiator and oxidizing agent, at a sufficient temperature and for a sufficient time to degrade the polyolefin,
- (c) venting the multi-screw extruder, and
- (d) removing the degraded polyolefin from the opposite end of the multi-screw extruder.
1 more element
Dependencies are inferred from the claim text.