Process for incorporating an ion-conducting polymer into a polymeric article to achieve anti-static behavior
AssigneeBayer MaterialScience AG
InventorsRobert A. Pyles, Ronald C. Hedden
Life of this patent
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Abstract
A process for endowing a polymeric article with a surface layer of an ion-conducting polymer to yield electrical surface resistivity sufficiently low for electrostatic discharge applications is provided. The polymeric article contains one or more immobilized, polymeric components having amine functional groups. The presence of the ion-conducting polymer in the surface layer lowers the surface electrical resistivity into the range suitable for electrostatic discharge applications, between about 1×105 and about 1×1012Ω/□. Plastic electrostatic dissipation materials produced by the inventive process may find use in the optical, electronics, automotive, entertainment, sporting goods, and medical sectors.
Claims10
A process comprising contacting at least a part of a surface of a polymeric article with a solvent mixture for a time and at a temperature sufficient to infuse at least a portion of the solvent mixture into the article, the solvent mixture containing;
- (a) water,
- (b) a carrier conforming to
- R1-[O—(CH2)n]mOR2
- wherein R1 and R2 independently denote a radical selected from the group consisting of linear and branched C1-18 alkyl, benzyl, benzoyl, phenyl and H,
- wherein n is 2 or 3, and m is 1-35, and
- (c) an acid H+X—, wherein X— represents a halide anion selected from the group consisting of F—, Cl—, Br—, or I—,
- optionally,
- (d) a surface leveling agent,
- wherein the polymeric article comprises a host polymer and an immobilized amine functional species wherein a monomer of a pendant moiety of the amine functional species is capable of reacting with the acid H+X−, and wherein the resulting article has a treated surface layer containing a polyamine hydrohalide and a surface resistivity between about 1×105Ω/□ and about 1×1012Ω/□.
A process for producing an electrostatic discharge material comprising, contacting at least a part of a surface of a polymeric article with a solvent mixture for a time and at a temperature sufficient to infuse at least a portion of the solvent mixture into the article, the solvent mixture containing;
- (a) water,
- (b) a carrier conforming to
- R1-[O—(CH2)n]mOR2
- wherein R1 and R2 independently denote a radical selected from the group consisting of linear and branched C1-18 alkyl, benzyl, benzoyl, phenyl and H,
- wherein n is 2 or 3, and m is 1-35, and
- (c) an acid H+X−, wherein X— represents a halide anion selected from the group consisting of F—, Cl—, Br—, or I—,
- optionally,
- (d) a surface leveling agent,
- wherein the polymeric article comprises a host polymer and an immobilized amine functional species wherein a monomer of a pendant moiety of the amine functional species is capable of reacting with the acid H+X−, and wherein the resulting electrostatic discharge material has a treated surface layer containing a polyamine hydrohalide and a surface resistivity between about 1×105Ω/□ and about 1×1012Ω/□.
Dependencies are inferred from the claim text.