Conductive polymeric material

Patent metadata

Field	Value
Publication number	US-10763004-B2
Application number	US-201515124776-A
Country	US
Kind code	B2
Filing date	Mar 12, 2015
Priority date	Mar 12, 2014
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

Abstract

A melt-processable conductive material including a first continuous phase, a second continuous phase and a non-continuous phase. The first continuous phase includes a first polymer, the second continuous phase includes a second polymer, and the non-continuous phase includes a third polymer. The second continuous phase is co-continuous with the first continuous phase and the non-continuous phase is substantially contained within the first continuous phase. A plurality of conductive particles is distributed in the first polymer or at a boundary between the first continuous phase and the second continuous phase. The conductive particles form a conductive network.

First claim

What is claimed is:

1. A conductive material, comprising:
a first continuous phase comprising a first polymer composition;
a second continuous phase comprising a second polymer composition different from the first polymer composition, the second continuous phase co-continuous with the first continuous phase;
a non-continuous phase comprising a third polymer composition different from the first polymer composition and different from the second polymer composition, the non-continuous phase substantially contained within the first continuous phase; and
a plurality of conductive particles distributed in the first polymer composition or at a boundary between the first continuous phase and the second continuous phase,
wherein the conductive particles form a conductive network and wherein the conductive material is melt-processable.

2. The conductive material of claim 1 , wherein the conductive particles are distributed in the first polymer composition.

3. The conductive material of claim 1 , wherein the conductive particles are distributed at the boundary between the first continuous phase and the second continuous phase.

4. The conductive material of claim 1 , wherein the conductive particles are spherical particles, rod-shaped particles, flakes, platelets or a combination thereof.

5. The conductive material of claim 1 , wherein the conductive particles comprise particles selected from the group consisting of carbon black, carbon nanotubes, graphene particles, carbon fibers, silver flakes, and silver nanoparticles.

6. The conductive material of claim 1 , wherein the conductive material has a shear modulus less than about 100 MPa.

7. The conductive material of claim 6 , wherein the conductive material has a shear modulus less than about 10 MPa.

8. The conductive material of claim 1 , wherein the conductive material is extrudable.

9. The conductive material of claim 1 , wherein the conductive material has a bulk conductivity of at least 0.1 S/m.

10. The conductive material of claim 9 , wherein the conductive material has a bulk conductivity of at least 1 S/m.

11. A film comprising the conductive material of claim 1 .

12. The film of claim 11 , wherein the film comprises a plurality of layers and wherein at least one of the plurality of layers comprises the conductive material and at least one of the plurality of layers comprises an insulating material.

13. The conductive material of claim 1 , wherein the second polymer composition comprises a silicone-based polymer.

14. A method of making an article, comprising the steps of:
selecting a first polymer composition, a second polymer composition and a third polymer composition such that the first polymer composition, the second polymer composition and the third polymer composition are mutually immiscible;
forming a polymer composite by mixing the first polymer composition with a plurality of conductive particles;
blending the polymer composite, the second polymer composition and the third polymer composition to form a conductive material; and
extruding the conductive material;
wherein the conductive material comprises:
a first continuous phase comprising the first polymer composition;
a second continuous phase comprising the second polymer composition, the second continuous phase co-continuous with the first continuous phase; and
a non-continuous phase comprising the third polymer composition;

and wherein the conductive particles form a conductive network.

15. The method of claim 14 , wherein the non-continuous phase is substantially contained within the first continuous phase.

16. The method of claim 14 , wherein the plurality of conductive particles are distributed in the first polymer composition or at a boundary between the first continuous phase and the second continuous phase.

17. The method of claim 14 , wherein the extruding step comprises co-extruding a plurality of layers and at least one of the plurality of layers comprises the conductive material and at least one of the plurality of layers comprises an insulating material.

18. The method of claim 14 , wherein the extruding step comprises co-extruding a plurality of horizontal planar layers.

19. The method of claim 14 , wherein the extruding step comprises co-extruding a plurality of vertical planar layers.

20. The method of claim 14 , wherein the extruding step comprises extruding or co-extruding at least one non-planar layer.

Assignees

• 3M Innovative Properties Co

Inventors

• Yust David T
• Yordem Onur Sinan

Classifications

• H01B1/24 Primary

  the conductive material comprising carbon-silicon compounds, carbon or silicon · CPC title

• C08L83/10

  Block- or graft-copolymers containing polysiloxane sequences (obtained by polymerising a compound having a carbon-to-carbon double bond on to a polysiloxane C08L51/08, C08L53/00) · CPC title

• C08L83/04 Primary

  Polysiloxanes · CPC title

• C08L23/04

  Homopolymers or copolymers of ethene · CPC title

• C08K2201/001

  Conductive additives · CPC title