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US 10,703,867 B2Granted
Thermal treatment of irradiated material solids using a heat transfer liquid
AssigneeE-Beam Services, Inc.
InventorsPaul R. Minbiole, Daniel F. Yasenchak
Life of this patent
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Abstract
Irradiated material solids are thermally treated using a heat transfer liquid to improve the physical, chemical, mechanical and/or biochemical properties of the irradiated material solids.
Claims9
A method of increasing the melt strength of polypropylene or copolymers thereof comprising:
- irradiating bulk polymer particles of substantially linear polypropylene polymer or copolymers thereof to form long-chain branched propylene polymers or copolymers,
- directly contacting said irradiated bulk polymer particles with a heat transfer liquid comprising water or an aqueous composition at a temperature to form heat-treated bulk polymer particles to facilitate long-chain branching and to subsequently deactivate all free radicals present in the irradiated bulk polymer particles, whereby the melt strength of the polypropylene or copolymers thereof is increased.
Dependencies are inferred from the claim text.