Polymer composition comprising carbon nanotubes

Patent metadata

Field	Value
Publication number	US-9384871-B2
Application number	US-201314372675-A
Country	US
Kind code	B2
Filing date	Jan 18, 2013
Priority date	Jan 20, 2012
Publication date	Jul 5, 2016
Grant date	Jul 5, 2016

Abstract

A composition can include polystyrene, modified-polystyrene, or a mixture thereof. The polystyrene, modified-polystyrene, or mixture thereof can include carbon nanotubes. The composition can also include a polyolefin. The composition can include at most 1.90% by weight of carbon nanotubes, based on a total weight of the composition. The composition can be made by melt blending the polystyrene, modified-polystyrene, or a mixture thereof with carbon nanotubes, and with the polyolefin. An article can be made from the composition.

First claim

The invention claimed is:

1. A composition comprising:
polystyrene, rubber modified-polystyrene, or a mixture thereof, said polystyrene, modified-polystyrene, or mixture thereof further comprising carbon nanotubes; and
a polyolefin;
wherein the composition comprises at least 0.65% by weight and at most 1.90% by weight of carbon nanotubes, based on a total weight of the composition, and wherein the rubber modified-polystyrene contains rubber in an amount ranging from 3 to 15 weight percent based on a total weight of the rubber modified-polystyrene.

2. The composition according to claim 1 , wherein the composition comprises at least 30% by weight of the polystyrene, the rubber modified-polystyrene, or the mixture thereof, based on the total weight of the composition.

3. The composition according to claim 2 , wherein the composition comprises at least 50% by weight of the polystyrene, the rubber modified-polystyrene, or the mixture thereof, based on the total weight of the composition.

4. The composition according to claim 1 , wherein the composition has a surface resistivity of at most 10 4 Ohm/sq.

5. The composition according to claim 1 , wherein the composition comprises at least 0.68% by weight of carbon nanotubes relative to the total weight of the composition.

6. The composition according to claim 1 , wherein the composition comprises at most 1.75% by weight of carbon nanotubes relative to the total weight of the composition.

7. The composition according to claim 1 , wherein the composition is free of any compatibilizer.

8. The composition according to claim 1 , wherein the composition comprises a polystyrene phase and a polyolefin phase;
wherein the polystyrene phase comprises the polystyrene, the rubber modified-polystyrene, or the mixture thereof;
wherein the polyolefin phase comprises the polyolefin; and
wherein the polystyrene phase comprises at least 50% by weight of carbon nanotubes, based on a total weight of the carbon nanotubes in the composition.

9. The composition according to claim 1 , wherein the composition comprises the rubber modified-polystyrene or the mixture of the rubber modified-polystyrene and the polystyrene.

10. The composition according to claim 1 , wherein the polyolefin is polyethylene, polypropylene, or a combination thereof.

11. The composition according to claim 1 , wherein the polyolefin is polyethylene.

12. The composition according to claim 1 , wherein the composition comprises at least 15% by weight of the polyolefin, based on the total weight of the composition.

13. A process for preparing a composition comprising:
(a) providing a masterbatch blend comprising a polystyrene, a modified-polystyrene, or a mixture thereof, and carbon nanotubes; and
(b) melt blending the masterbatch blend with a polystyrene, a modified-polystyrene, or a mixture thereof and with a polyolefin;
wherein the composition comprises at most 1.90% by weight of carbon nanotubes, based on a total weight of the composition.

14. The process according to claim 13 , wherein the masterbatch blend comprises at least 5% by weight of carbon nanotubes based on the total weight of the masterbatch blend.

15. The process according to claim 13 , wherein the masterbatch blend, the polyolefin, and the polystyrene, the modified-polystyrene, or the mixture thereof are blended in step (b) in amounts such that the composition comprises at least 30% by weight of the polystyrene, the modified-polystyrene, or the mixture thereof based on the total weight of the composition.

16. The process according to claim 13 , wherein the masterbatch blend, the polyolefin, and the polystyrene, the modified-polystyrene, or the mixture thereof are blended in step (b) in amounts such that the composition comprises at least 50% by weight of the polystyrene, the modified-polystyrene, or the mixture thereof based on the total weight of the composition.

17. The process according to claim 13 , wherein the masterbatch blend, the polyolefin, and the polystyrene, the modified-polystyrene, or the mixture thereof are blended in step (b) in amounts such that the composition comprises at most 1.90% by weight of carbon nanotubes, and at least 0.3% by weight of carbon nanotubes based on the total weight of the composition.

18. The process according to claim 13 , wherein the masterbatch blend, the polyolefin, and the polystyrene, the modified-polystyrene, or the mixture thereof are blended in step (b) in amounts such that the composition comprises at most 1.90% by weight of carbon nanotubes, and at least 0.5% by weight of carbon nanotubes based on the total weight of the composition.

19. An article made of the composition according to claim 1 .

20. The process according to claim 13 , wherein the modified-polystyrene is a rubber modified-polystyrene containing rubber in an amount ranging from 3 to 15 weight percent based on a total weight of the rubber modified-polystyrene, and wherein the composition comprises at least 0.65% by weight and at most 1.90% by weight of carbon nanotubes, based on the total weight of the composition.

21. The composition according to claim 1 , wherein the composition is free of any compatibilizer, and wherein the composition comprises a polystyrene phase and a polyolefin phase;
wherein the polystyrene phase comprises the polystyrene, the rubber modified-polystyrene, or the mixture thereof;
wherein the polyolefin phase comprises the polyolefin; and
wherein the polystyrene phase comprises at least 50% by weight of carbon nanotubes, based on a total weight of the carbon nanotubes in the composition.

22. The composition according to claim 1 , wherein the composition comprises a polystyrene phase and a polyolefin phase;
wherein the polystyrene phase comprises the rubber modified-polystyrene or the mixture of the rubber modified-polystyrene and the polystyrene;
wherein the polyolefin phase comprises the polyolefin; and
wherein the polystyrene phase comprises at least 50% by weight of carbon nanotubes, based on a total weight of the carbon nanotubes in the composition.

23. The composition according to claim 1 , wherein the polyolefin is polyethylene, and wherein the composition is free of any compatibilizer.

24. The composition according to claim 1 , wherein the polyolefin is polyethylene, and wherein the composition comprises the rubber modified-polystyrene or the mixture of the rubber modified-polystyrene and the polystyrene.

Assignees

• Total Res & Technology Feluy

Inventors

• Rousseaux Dimitri
• Duc Michel
• Lodefier Philippe
• Lhost Olivier

Classifications

• H01B3/442

  from aromatic vinyl compounds · CPC title

• C08K3/04

  Carbon · CPC title

• C08K7/24

  inorganic · CPC title

• H01B1/24 Primary

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

• H01B3/441

  from alkenes · CPC title