Patent ID: 11889671
Assignee: UNIVERSITE CLAUDE BERNARD LYON I
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 13:
14. A process to produce a composite material suitable for use as EMI shielding material of claim 1, the process is characterised in that it comprises a step of blending
a component A being a polymer resin which is at least one amorphous polymer resins or at least one semi-crystalline polymer resin selected from polyethylene resin and/or polypropylene resin;
from 22.0 to 50.0 wt. % of component B being at least one metal-coated particle based on the total weight of the composite material, wherein the at least one metal-coated particle of component B is metal-coated fibres with an average length of at least 150 μm, and wherein component B has a density of less than 4.0 g/c; and
from 1.0 to 5.0 wt. % of component C being one or more dispersants based on the total weight of the composite material; wherein one or more dispersants are selected from fatty acids, fatty acid derivatives, ethylene bis stearamide, functionalized waxes, maleic anhydride-grafted polymers, and any mixture thereof;
to form a composite material in which the blend of components A, B and C has a density ranging from 0.8 to 2.0 g/cc as determined according to ISO 1183.