Maro Publications

Conductive Plastics

Patents with Abstracts

*1/10/2013

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Patents with Abstracts

6. 8,344,053 
Highly conductive composites 

Xu et al of Pixelligent Technologies, LLC, Maryland, improved conductivity of nanocrystal composites by domain segregation of polymer blends or block copolymers.  This separation leads to preferential placement of conductive filler promoting the self-assembly of a thermal and/or electrical conducting pathway composed of high aspect ratio filler. The self-assembly of such thermal and/or electrical conducting pathway effectively enhances the thermal and/or electrical conductivity of the composite with significantly less amount of filler.  (RDC 1/10/2013)

5. 8,277,690 
Conducting copolymer ferromagnetic composite and a process for the preparation thereof
 
Dhawan et al of the Council of Scientific & Industrial Research, India, produced a conducting and magnetic copolymer ferromagnetic composite by in-situ polymerization with ferrite particles such as a copolymer of aniline and ethylene-dioxy thiophene containing ferrite particles. The present invention also provides insitu polymerization of aniline and ethylene-dioxy thiophene in the presence of ferrite particles and suitable surfactant medium. This conducting copolymer ferromagnetic composite can be used for the dissipation of electrostatic charge, for the shielding of electromagnetic interference and as absorbing of electromagnetic waves in the microwave region. (RDC 10/4/2012)

4. 8,241,752 
Transparent conductive articles and methods of making same
 
Bright of 3M, Minnesota, developed a lightweight, coated, flexible, plastic substrate for OLED displays.  The layer has both a low enough resistance to function as an electrode for the display, and low oxygen and moisture permeability.  The display is thereby protected from oxygen and moisture degradation.  The barrier material includes at least one of a thin metallic film, an organic polymer, a thin transparent dielectric, a thin transparent metal nitride, and a thin transparent conductive oxide. The conductive material includes at least one of a thin transparent conductive oxide, a thin transparent metallic film, and a thin transparent metal nitride. Preferably, a multilayer polymer base coat is deposited over the substrate to exclude moisture and atmospheric gases. (RDC 8/24/2012)

3. 8,216,492 
Conductive masterbatches and conductive monofilaments
 
Cheng of the Taiwan Textile Research Institute, Taiwan, developed a polyester matrix powder comprising a polybutylene terephthalate, a homogeneously dispersed carbon nanotube powder, a dispersant and a chain extender; to a conductive masterbatch with homogeneous and smooth surface; to a process for the preparation of the conductive masterbatch; to a conductive monofilament prepared from the conductive masterbatch; to a process for the preparation of the conductive monofilament; and to a fabric article prepared from the monofilament. The present invention is characterized in the preparation of carbon nanotube-containing fiber materials with higher conductivity and the improvement of the spinning property of the conductive masterbatches to avoid blocking and yarn breakage during the spinning process. (RDC 7/24/2012)

2. 8,188,212 
Method of enhancing conductivity of conductive polymer product
 
Osada, Fukuzawa and Nagai of Nikkiso Co., Japan, enhanced the conductivity of various conductive polymer products, such as a conductive polymer product obtained by polymerizing 3,4-ethylenedioxythiophene in an aqueous solution of polystyrenesulfonic acid.  The method of enhancing the conductivity of a conductive polymer product includes placing a conductive polymer product, water, an organic solvent compatible with the conductive polymer product, and carbon dioxide gas in a pressure vessel; and applying heat and pressure to an interior of the pressure vessel to bring the carbon dioxide into a supercritical state. (RDC 6/8/2012)

1. 8,128,844 
Electroconductive thermoplastic resin composition and plastic article including the same
 
Kim, Lee and Chang of Cheil Industries, South Korea, developed a conductive plaatic consisting of 80 to 99 wt%  thermoplastic resin, 0.1 to 10 wt% carbon nanotubes and 0.1 to 10 wt% organo nanoclay.  During injection or extrusion  the organo nanoclay prevents the carbon nanotubes from being oriented and promtes uniform dispersion. In addition, the relatively reduced content of carbon nanotubes can inhibit deterioration of the basic mechanical properties of the thermoplastic resin caused by the inclusion of excessive carbon nanotubes. (RDC 4/18/2012)

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Roger D. Corneliussen
Editor
www.maropolymeronline.com

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Tel: 610 363 9920
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E-Mail: cornelrd@bee.net  

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Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
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* Date of latest addition; date of first entry is 4/18/2012.