James A Leacock

US Patent:

7566749, Jul 28, 2009

Filed:

Aug 31, 2005

Appl. No.:

11/218209

Inventors:

Alan Fischer - Cambridge MA, US
Timothy Jozokos - Pelham NH, US
James Leacock - Boston MA, US
Andrew Rich - Hanover MA, US

Assignee:

Hyperion Catalysis International, Inc. - Cambridge MA

International Classification:

C08K 3/04

US Classification:

524496, 524495

Abstract:

Methods of preparing conductive thermoset precursors containing carbon nanotubes is provided. Also provided is a method of preparing conductive thermosets containing carbon nanotubes. The carbon nanotubes may in individual form or in the form of aggregates having a macromorpology resembling the shape of a cotton candy, bird nest, combed yarn or open net. Preferred multiwalled carbon nanotubes have diameters no greater than 1 micron and preferred single walled carbon nanotubes have diameters less than 5 nm. Carbon nanotubes may be adequately dispersed in a thermoset precursor by using a extrusion process generally reserved for thermoplastics. The thermoset precursor may be a precursor for epoxy, phenolic, polyimide, urethane, polyester, vinyl ester or silicone. A preferred thermoset precursor is a bisphenol A derivative.

US Patent:

7910650, Mar 22, 2011

Filed:

Aug 20, 2007

Appl. No.:

11/841596

Inventors:

Alan Fischer - Cambridge MA, US
Timothy Jozokos - Pelham NH, US
James Leacock - Boston MA, US
Andrew Rich - Hanover MA, US

Assignee:

Hyperion Catalysis International, Inc. - Cambridge MA

International Classification:

C08K 3/04

US Classification:

524495, 524496

Abstract:

Methods of preparing conductive thermoset precursors containing carbon nanotubes is provided. Also provided is a method of preparing conductive thermosets containing carbon nanotubes. The carbon nanotubes may in individual form or in the form of aggregates having a macromorpology resembling the shape of a cotton candy, bird nest, combed yarn or open net. Preferred multiwalled carbon nanotubes have diameters no greater than 1 micron and preferred single walled carbon nanotubes have diameters less than 5 nm. Carbon nanotubes may be adequately dispersed in a thermoset precursor by using a extrusion process generally reserved for thermoplastics. The thermoset precursor may be a precursor for epoxy, phenolic, polyimide, urethane, polyester, vinyl ester or silicone. A preferred thermoset precursor is a bisphenol A derivative.

US Patent:

8163831, Apr 24, 2012

Filed:

Feb 8, 2011

Appl. No.:

13/023095

Inventors:

Alan Fischer - Cambridge MA, US
Timothy Jozokos - Pelham NH, US
James Leacock - Boston MA, US
Andrew Rich - Hanover MA, US

Assignee:

Hyperion Catalysis International, Inc. - Cambridge MA

International Classification:

C08K 3/04

US Classification:

524495, 524496

Abstract:

Methods of preparing conductive thermoset precursors containing carbon nanotubes is provided. Also provided is a method of preparing conductive thermosets containing carbon nanotubes. The carbon nanotubes may in individual form or in the form of aggregates having a macromorpology resembling the shape of a cotton candy, bird nest, combed yarn or open net. Preferred multiwalled carbon nanotubes have diameters no greater than 1 micron and preferred single walled carbon nanotubes have diameters less than 5 nm. Carbon nanotubes may be adequately dispersed in a thermoset precursor by using a extrusion process generally reserved for thermoplastics. The thermoset precursor may be a precursor for epoxy, phenolic, polyimide, urethane, polyester, vinyl ester or silicone. A preferred thermoset precursor is a bisphenol A derivative.