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Composite material with EMI shielding properties and process to produce it

專利號
US11889671B2
公開日期
2024-01-30
申請人
TOTALENERGIES ONETECH; CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS); UNIVERSITé CLAUDE BERNARD LYON 1 (UCBL)(FR Courbevoie FR Paris FR Villeurbanne)
發(fā)明人
Olivier Lhost; Yves Trolez; Anatoli Serghei; Hubert Lecocq; Philippe Cassagnau
IPC分類
H05K9/00; C08J3/20; C08K5/09; C08K5/20; C08K9/02
技術(shù)領(lǐng)域
wt,resin,composite,fibres,at,mi2,from,min,shielding,polymer
地域: Courbevoie

摘要

The disclosure provides for a composite material suitable for use as EMI shielding material, remarkable in that it comprises a component A being a polymer resin being at least one amorphous polymer resin and/or at least one semi-crystalline polymer resin selected from polyethylene resin and/or polypropylene resin; from 15.0 to 60.0 wt. % of component B being at least one metal-coated particle based on the total weight of the composite material; and from 0.5 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; wherein the blend of components A, B and C shows a density ranging from 0.8 to 2.0 g/cc. A process to produce such composite material is also described as well as an EMI shield article made from such composite material and the use of such composite material in an EMO shield article.

說明書

FIG. 15 is the shielding as a function of incident wave frequency in the high frequency 8-18 GHz range for PP 7060—silver glass fibers 10% vol and different stearic acid concentrations. Thickness 1 mm.

FIG. 16 is the shielding as a function of incident wave frequency in the high frequency 8-18 GHz range for PP 7060—silver glass fibers 15% vol and different stearic acid concentrations. Thickness 1 mm.

DETAILED DESCRIPTION

When describing the polymers, composite materials, uses and processes of the disclosure, the terms employed are to be construed by the following definitions, unless a context dictates otherwise. For the disclosure, the following definitions are given:

As used herein, the term “catalyst” refers to a substance that causes a change in the rate of a polymerization reaction. In the present disclosure, it is especially applicable to catalysts suitable for the polymerization of propylene to polypropylene.

As used herein, a “polymer” is a polymeric compound prepared by polymerizing monomers, whether of the same or of a different type. The generic term polymer thus embraces the term homopolymer, usually employed to refer to polymers prepared from only one type of monomer, and the terms copolymer and interpolymer as defined below.

As used herein, a “copolymer”, “interpolymer” and like terms mean a polymer prepared by the polymerization of at least two different types of monomers. These generic terms include polymers prepared from two or more different types of monomer, e.g. terpolymers, tetrapolymers, etc.

權(quán)利要求

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