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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

For example, the one or more dispersants are or comprise fatty acids being saturated fatty acids and/or unsaturated fatty acids. For example, the one or more dispersants are or comprise saturated fatty acids. For example, one or more dispersants are or comprise at least one fatty acid selected from stearic acid, palmitic acid, myristic acid, lauric acid, oleic acid, arachidic acid, erucic acid, behenic acid and any mixture thereof.

For example, the one or more dispersants are or comprise fatty acids having a number of carbon atoms ranging from 6 to 24, preferably from 12 to 22.

For example, the one or more dispersants are or comprise at least one fatty acid derivative selected from a salt of fatty acid, an ester of fatty acid, a carboxylate of fatty acid and any mixture thereof.

For example, the one or more dispersants are or comprise at least one fatty acid derivative selected from methyl stearate, lithium stearate, sodium stearate, magnesium stearate, calcium stearate, barium stearate, zinc stearate, aluminium stearate and any mixture thereof.

For example, the one or more dispersants are or comprise at least one fatty acid derivative being glycerol monostearate.

For example, the one or more dispersants are or comprise at least one functionalized wax selected from functionalized paraffin wax, functionalized polyethylene wax, functionalized polypropylene wax and mixtures thereof. For example, the functionalized waxes comprise an acid function or an anhydride function such as a maleic anhydride function.

For example, the one or more dispersants are or comprise at least ethylene bis stearamide (EBS—CAS Registry Number: 110-30-5) and/or its derivatives.

權(quán)利要求

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