Method for trapping a residual monomer with epoxide function in a thermoplastic composition
AssigneeArkema Inc.
InventorThierry Senninger
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Abstract
For trapping a residual monomer containing an expoxide function that has not reacted by copolymerization or by grafting, in a thermoplastic composition based on a copolymer of ethylene and/or propylene, a sufficient amount of an acidic trapping additive is added to remove the residual monomer. The trapping additive is preferably a porous zeolite with a pore diameter of between 2 and 10 angstroms. Improved compositions and blends are thereby obtained.
Claims40
A process for trapping an unreacted residual monomer comprising at least one epoxide function, in a thermoplastic composition comprising a copolymer of ethylene and/or propylene with at least one monomer comprising at least one epoxide function, said process comprising the following steps:
- preparing a melt of said thermoplastic composition comprising said unreacted residual monomer comprising an epoxide function,
- adding to said melt a sufficient amount of a trapping additive having Lewis or Brönsted acid sites so as to trap said unreacted residual monomer.
Dependencies are inferred from the claim text.