Process for making antistatic or electrically conductive polymer compositions
AssigneeZipperling Kessler & Co. (GmbH & Co.)
InventorsBernhard Wessling, Merkle Holger, Susanne Blattner
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Abstract
Polymeric compositions rendered antistatic or electrically conductive showing increased conductivity are obtained by incorporating into a matrix polymer a combination of A. a first finely divided conductive material, namely conductive carbon black with a BET surface area of more than 80 m.sup.2 /g or an intrinsically conductive organic polymer in complexed form, and B. a second finely divided conductive material, namely graphite or an intrinsically conductive polymer in complexed form, which is different from the material used as material A, or a metal powder and/or C. a finely divided non conductive material having an average particle size below 50 microns.
Claims8
A method for preparing antistatic or electrically conductive polymer compositions having increased conductivity which comprises the step of mixing at least one non-conductive matrix polymer and two additives A and C, wherein the additives A and C are respectively selected from the group consisting of:
- A. at least one finely divided conductive material selected from the group consisting of conductive carbon black with a BET surface area of more than 80 m.sup.2 /g and an intrinsically conductive organic polymer in complexed form, and and
- C. a finely divided non-conductive material having an average particle size below 50 microns which is nonfusible under the processing conditions and insoluble in the matrix polymer.
A method for preparing antistatic or electrically conductive polymer compositions having increased conductivity which comprises the step of mixing at least one non-conductive matrix polymer and two additives A and C, wherein the additives A and C are respectively selected from the group consisting of:
- A. at least one finely divided conductive material selected from the group consisting of conductive carbon black with a BET surface area of more than 80 m.sup.2 /g and an intrinsically conductive organic polymer in complexed form, and
- C. at least one finely divided non-conductive material having an average particle size below 50 microns which is nonfusible under the processing conditions and insoluble in the matrix polymer,
- wherein the volume ratio between additives A and C is from about 20:1 to about 1:20.
A method for preparing antistatic or electrically conductive polymer compositions having increased conductivity which comprises the step of mixing at least one non-conductive matrix polymer and two additives A and C, wherein the additives A and C are respectively selected from the group consisting of:
- A. at least one finely divided conductive material selected from the group comprising conductive carbon black with a BET surface area of more than 80 m.sup.2 /g and an intrinsically conductive organic polymer in complexed form, and
- C. at least one finely divided non-conductive material having an average particle size below 50 microns which is nonfusible under the processing conditions and insoluble in the matrix polymer,
- wherein the volume ratio between additives A and C is from about 2:1 to about 10:1.
Dependencies are inferred from the claim text.