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US 10,703,831 B2Granted
Methods for modifying the rheology of polymers
AssigneeLummus Novolen Technology GmbH
InventorsManfred Wittner, Angela Hilgers, Geoffrey Detavernier, Michael Neidhoefer
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Abstract
The disclosure relates to a method for modifying the rheology of a polymer and a polymeric composition obtained by the method. The composition comprises at least one organic peroxide and water in emulsion form. The polymer may comprise a polyolefin. The method comprises extruding a molten polymer and the composition and removing volatile compounds from the molten polymer.
Claims20
A method for modifying the rheology of a polymer, comprising:
- extruding a molten polymer and a composition consisting essentially of at least one organic peroxide, at least one emulsifier, and water in emulsion form;
- and
- removing volatile compounds from the molten polymer under extrusion conditions and under a predetermined vacuum,
- wherein the polymer comprises a polyolefin,
- wherein the volatile compounds comprise water and volatile organic compounds resulting from the degradation of at least one of the organic peroxide or the polymer, and
- wherein removing volatile compounds is performed by establishing the predetermined vacuum in at least one extruder venting zone.
3 more elements
A method for modifying the rheology of a polymer, comprising:
- extruding a molten polymer and a composition comprising at least one organic peroxide and water in emulsion form, wherein the composition does not include mineral oil;
- and
- removing volatile compounds from the molten polymer under extrusion conditions and under a vacuum,
- wherein the polymer comprises a polyolefin,
- wherein the volatile compounds comprise water and volatile organic compounds resulting from the degradation of at least one of the organic peroxide or the polymer, and
- wherein removing volatile compounds is performed by establishing the predetermined vacuum in at least one extruder venting zone.
3 more elements
Dependencies are inferred from the claim text.