Hyperion Catalysis

Hyperion Catalysis International, US 4663230, H.G. Tennent, 1986, Carbon Fibrils, Method for Producing Same, and Compositions Containing Same... 

HONAM PETROCHEMICAL CORP HONEYWELL INTERNATIONAL INC HOUGHTON INTERNATIONAL INC HUNTSMAN CORPORATION HYPERION CATALYSIS INTERNATIONAL ICC INDUSTRIES ICO INC... 

Hyperion Catalysis International, Cambridge, MA, USA Hollow carbon fibrils... 

Hyperion Catalysis International developed a new technology to produce hollow carbon fibrils. The patented technology produces hollow fibrils of very small diameter in a catalytic process using ethylene gas as the raw material. The fibril structure is given in Figure 2.78. The striking feature of these fibrils is... 

Figure 2.79. Hollow graphite fibrils (left) and fibrils mixed with carbon black (right). Courtesy of Hyperion Catalysis International, Cambridge, MA, USA.

Hyperion Catalysis International, 38 Smith Place, Cambridge, MA 02138, USA IH Polymeric Products, Ltd., Meopham Triding Estate, Meopham, Gravesend, Kent DAI3 OLT, England... 

Hyperion Catalysis International markets its nanombes under the name Fibril . Adding 5% to polycarbonate transforms its volume resistivity from lO to 10 ohm-cm and, unlike some particulate additives, only reduces the tensile strength by 11%, while increasing the flexural modulus by 18%. One important application is the polyamide fuel lines in vehicles, and another is the production of the conductive thermoplastic fenders used for in-line electrostatic painting. In the case of fuel lines, the compounding system must produce highly homogeneous compositions to rule out local static build up. Less than one per cent of nanotubes is sufficient. 

In a first example, a masterhatch with 15 wt% MWCNTs (Hyperion Catalysis, Inc., Cambridge, USA) has been diluted to obtain composites with 0.875 wt% filler content. For this purpose, a DACA microcompounder (DACA Instruments, USA) has been employed. Two samples have been prepared at 250 and 300 °C mixing temperature, whereby the mixing time and speed were 15 min and 50 rpm, respectively. LM indicated almost complete nanotube dispersion at both mixing temperatures 1) Significant differences in the... 

The Tokyo University of Technology reports another CNT application in which they are dispersed with rubber materials in order to make them electrically conductive. The materials produced exhibit excellent volume resistivity. Potential applications include electrode materials, EMI shielding materials and antistatic agents. In the US, Hyperion Catalysis International has modified fluoropolymers with CNT to make them conductive. 

Ma, Jun Chishti, Asif Ngaw, Lein Fischer, Allen Braden, Robert/Hyperion Catalysis International Inc. 

Tanahashi, Masakazu Igaki, Emiko/Matsushita Electric Industrial Co., Ltd., Japan 20030030963 (11/20/1997) Tennent, Howard Moy, David Niu, Chun-ming/ Hyperion Catalysis International, Inc., U.S. 

Two types of PET were used in this study one was neat PET and the other the CNT-filled PET. The latter was obtained from Hyperion Catalysis International, Inc. and prefilled with 15 wt% (i.e., 12 vol%) carbon nanotubes through a twin-screw extruder. The CNT-filled PET came in a cylindrical pellet form with sizes of 3 mm in diameter and 2.5 nun in height. The CNTs used to prepare master batches of the CNT-filled PET peUets were hollow, multi-walled tubes with 8-15 walls and a graphitic miCTostructure. The outside diameter of the tube was approximately 10-15 nm, whereas the inside diameter was about 5 nm. The tube had a very large aspect ratio with the tube length in the range of 10-15 pm. 

Fig. 12.5 Complex viscosity of polycarbonate with and without CNTs as a function of angular frequency. (Courtesy of Hyperion Catalysis International, Inc.)...

Hyperion Catalysis International. PlastAdd. Comp. September 2001,... 

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