CARBON FIBER AGGLOMERATES AND PROCESS FOR PRODUCTION OF SAME

Title:

CARBON FIBER AGGLOMERATES AND PROCESS FOR PRODUCTION OF SAME

Document Type and Number:

WIPO Patent Application WO/2010/101215

Kind Code:

A1

Abstract:

Provided is a process for the production of carbon fiber agglomerates by bringing a carbon-containing compound into contact with a catalyst in a heated zone, wherein the catalyst is a supported catalyst which is prepared by heat-treating aluminum hydroxide which has a BET specific surface area of 1m2/g or less and a cumulative 50% volume particle diameter of 10 to 300μm until the BET specific surface area reaches to 50 to 200m2/g, and then making either a metal catalyst or a catalyst metal precursor supported on the carrier obtained by the above heat treatment. Also provided are carbon fiber agglomerates produced by the process, which comprise cocoon-shaped agglomerates that are each composed of secondary agglomerate fibers and that have long/short ratios of 5 or higher. The secondary agglomerate fibers are non-linear agglomerates which are each composed of non-linear primary carbon fibers and which have diameters of 1μm or longer and lengths of 5μm or longer. The non-linear primary carbon fibers have diameters of 5 to 100nm and aspect ratios of 5 to 1000, and contain graphite layers which extend approximately parallel to the fiber axis. Additionally provided is a resin composite material containing the carbon fiber agglomerates. Thus, the invention provides carbon fiber agglomerates useful as a filler which can impart electrical conductivity to a resin composite material even when added in a small amount.

Inventors:

KAMBARA EIJI (JP)

Application Number:

PCT/JP2010/053546

Publication Date:

September 10, 2010

Filing Date:

March 04, 2010

Export Citation:

Click for automatic bibliography generation Help

Assignee:

SHOWA DENKO KK (JP)
KAMBARA EIJI (JP)

International Classes:

C01B31/02; B01J23/745; C08K3/04; C08L101/00; D01F9/127

Domestic Patent References:

WO1995031281A1	1995-11-23
WO2006079186A1	2006-08-03
WO2006050903A2	2006-05-18
WO1995031281A1	1995-11-23
WO2006079186A1	2006-08-03

Foreign References:

JP2007091482A	2007-04-12
JP2008174442A	2008-07-31
US5726116A	1998-03-10
EP1797950A1	2007-06-20
JPS52107329A	1977-09-08
JP2008174442A	2008-07-31
JP2003095645A	2003-04-03

Other References: