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Polymeric compositions containing nanotubes

A technology of polymers and compositions, applied in the direction of carbon nanotubes, single-walled carbon nanotubes, multi-walled carbon nanotubes, etc., can solve the problems of unsatisfactory practical applications, decreased mechanical strength and impact strength, and difficulty in obtaining sheets with satisfactory properties. Materials and other issues

Inactive Publication Date: 2008-10-08
CABOT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in poor fluidity during the extrusion molding step, making it difficult to obtain a sheet with satisfactory properties
In addition, the mechanical strength (particularly impact strength) of the obtained sheet decreased to such an extent that it was not satisfactory for practical use

Method used

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  • Polymeric compositions containing nanotubes
  • Polymeric compositions containing nanotubes
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Examples

Experimental program
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Effect test

Embodiment 1

[0133] The compounding equipment was a high shear internal mixer Haake Rheocord 90 equipped with a mixing chamber with two counter-rotating Brabender-shaped blades. For each compound, the following method was used. The granular polymer is first introduced into the mixing chamber. Carbon black (Vulcan XC-500 carbon black) or thin thick multi-walled carbon nanotubes (MWNTs) are introduced into the mixing chamber.

[0134] At the end of the mixing cycle (1 minute at 40RPM / 40RPM to 200RPM in 3 minutes / 2 minutes at 200RPM), the compound was removed from the mixer and passed between two Mylar sheets on a hydraulic press Press down and flatten. The material was then cut into small pieces for a second mixing cycle to ensure good filler dispersion and a uniform compound.

[0135] Several compounds were prepared at different loadings (wt%) in EEA LE5861 obtained from Borealis with a nominal MFI of 6 g / 10 min at 190°C / 2.16 kg:

[0136] Carbon black: 35-30-25-20-17.5-15-12.5-10%

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Abstract

A polymeric composition containing at least one polymer and carbon nanotubes is described. The polymeric composition can have carbon nanotubes that are multi-wall carbon nanotubes and / or single-wall carbon nanotubes. The compositions can also contain carbon black. Also described are various articles made from the polymeric compositions including cables and other articles.

Description

Background technique [0001] This application claims priority under 35 U.S.C § 119(e) to US Provisional Patent Application No. 60 / 706,469 filed August 8, 2005, the entire contents of which are hereby incorporated by reference. [0002] The present invention relates to carbon nanotubes in various compositions, and further to their use in wire and cable compounds (eg, shielding compositions). The present invention also relates to the incorporation of blends of carbon nanotubes and carbon black into wire and cable compounds and obtaining certain properties through the use of such blends. [0003] Insulated cables are widely used in the transmission and distribution of electrical energy. Two-component cables may contain conductive carbon black, a strand shield and an insulating shield. Use semiconducting materials to form equipotential surfaces between conductors and insulators. [0004] Conductive fillers can be incorporated into polymer compositions by a variety of mixing tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/04C08K7/06C08L23/08H01B1/24C08J5/00
CPCY10T428/1352C08K7/24H01B3/441B82Y30/00C08L23/0869C08J2323/08C08K3/04C08J5/005C08K3/041C08L23/08C01B32/17C01B32/159C01B2202/06C01B2202/02
Inventor 桑迪普·巴特琼-米歇尔·庞塞利特文森佐·陶米纳
Owner CABOT CORP
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