Process for incorporating an ion-conducting polymer into a polymeric article to achieve anti-static behavior
View Patent ↗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 1×10 5 and about 1×10 12 Ω/□. Plastic electrostatic dissipation materials produced by the inventive process may find use in the optical, electronics, automotive, entertainment, sporting goods, and medical sectors.
1. A treated polymeric article produced by 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
R 1 —[—O—(CH 2 ) n ] m OR 2
wherein R 1 and R 2 independently denote a radical selected from the group consisting of linear and branched C 1-18 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 treated polymeric article has a treated surface layer containing a polyamine hydrohalide and a surface resistivity between about 1×10 5 Ω/□ and about 1×10 12 Ω/□.
2. The treated polymeric article according to claim 1 , wherein the amine functional species is an amine-functional co-monomer.
3. The treated polymeric article according to claim 2 , wherein the polymeric article comprises at least one component selected from the group consisting of polyurethane, polyester, polyamide, polystyrene, polyetherimide, polymethylmethacrylate and acrylonitrile butadiene styrene.
4. The treated polymeric article according to claim 2 , wherein the acid is a member selected from the group consisting of HF, HCl, HBr, or HI.
5. The treated polymeric article according to claim 2 , wherein the contacting is one selected from the group consisting of immersion, spraying and flow coating.
6. The article according to claim 1 , wherein the amine functional species is present as a co-monomer in the host polymer.
7. The article according to claim 1 , wherein the amine functional species is a linear or branched homo- or co-polymer blended into the host polymer.
8. The article according to claim 1 , wherein the amine functional species is present as an interpenetrating network or semi-interpenetrating network infused into the host polymer.
9. An electrostatic discharge material produced by 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
R 1 —[—O—(CH 2 ) n ] m OR 2
wherein R 1 and R 2 independently denote a radical selected from the group consisting of linear and branched Cl 1-18 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 1×10 5 Ω/□ and about 1×10 12 Ω/□.
10. The electrostatic discharge material according to claim 9 , wherein the amine functional species is an amine-functional co-monomer.
11. The electrostatic discharge material according to claim 10 , wherein the polymeric article comprises at least one component selected from the group consisting of polyurethane, polyester, polyamide, polystyrene, polyetherimide, polymethylmethacrylate and acrylonitrile butadiene styrene.
12. The electrostatic discharge material according to claim 10 , wherein the acid is a member selected from the group consisting of HF, HCl, HBr, or HI.
13. The electrostatic discharge material according to claim 10 , wherein the contacting is one selected from the group consisting of immersion, spraying and flow coating.
14. The electrostatic discharge material according to claim 9 , wherein the amine functional species is present as a co-monomer in the host polymer.
15. The electrostatic discharge material according to claim 9 , wherein the amine functional species is a linear or branched homo- or co-polymer blended into the host polymer.
16. The electrostatic discharge material according to claim 9 , wherein the amine functional species is present as an interpenetrating network or semi-interpenetrating network infused into the host polymer.