Crosslinking of reactive polyolefin prepolymers using a coreactant
AssigneeMcMaster University
InventorsDavid K. Potter, Tayyab Hameed
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Abstract
The present invention provides a cross linked polyolefin thermoset material, comprising maleic anhydride functionalized reactive polyolefin wax cross linked with a polyamine. The thermoset may be made by a method involving reaction of a maleic anhydride functionalized reactive polyolefin wax with a polyamine. The polyolefin may be polyethylene, polypropylene and their copolymers. The polyamine is a primary or secondary alkyl polyamines, alkyl ether polyamines, aryl polyamines. Polyols may be used instead of polyamines, for example alkyl polyols, alkyl ether polyols or aryl polyols.
Claims31
A cross-linked polyolefin thermoset material, comprising:
- maleic anhydride functionalized reactive polyolefin wax cross-linked with a polyamine, wherein said polyamine is present in said thermoset material in a range from about 25% by weight to about 75% by weight.
A method of synthesizing a cross-linked polyolefin thermoset product, comprising:
- a) simultaneously pumping at an elevated temperature a melt stream of maleic anhydride functionalized reactive polyolefin wax and a melt stream of polyamine through a static mixer, also maintained at an elevated temperature, to form a mixture;
- and
- b) dispensing the mixture from the static mixer and heating the mixture at a second temperature for a suitable period of time to induce a desired amount of crosslinking between the maleic anhydride functionalized reactive polyolefin wax and the polyamine to produce a crosslinked polyolefin thermoset product.
A method of synthesizing a cross-linkable polyolefin thermoset mixture, comprising:
- a) mixing a maleic anhydride functionalized reactive polyolefin wax and a polyamine at a first temperature at which both the anhydride functionalized reactive polyolefin wax and the polyamine are in a solvent free melt state to form a cross-linkable polyolefin thermoset mixture;
- and
- b) packaging the mixture in a package for distribution.
Dependencies are inferred from the claim text.