Compositions – Electrically conductive or emissive compositions
Reexamination Certificate
2007-05-29
2008-08-19
Kopec, Mark (Department: 1796)
Compositions
Electrically conductive or emissive compositions
C429S249000, C429S254000, C252S510000, C252S511000
Reexamination Certificate
active
07413685
ABSTRACT:
A method and composition is disclosed for making conductive flow field separator plates having reduced resistivity, lower weight and lower cost. The plates are made by blending from about 0.5 wt % to about 40 wt %, preferably from about 1 wt % to about 30 wt %, most preferably from about 5 wt % to about 20 wt %, of the liquid crystal polymer; from about 0.5 wt % to about 40 wt %, preferably from about 1 wt % to about 30 wt %, most preferably from about 5 wt % to about 20 wt % of the poly(styrene-co-maleic anhydride); and from about 20 wt % to about 99 wt %, preferably from about 60 wt % to about 98 wt %, most preferably from about 70 wt % to about 90 wt % of the conductive filler. The blend is then moulded to form the conductive flow field separator plates.
REFERENCES:
patent: 4124747 (1978-11-01), Murer et al.
patent: 4169816 (1979-10-01), Tsien
patent: 4686072 (1987-08-01), Fukuda et al.
patent: 5563216 (1996-10-01), Niwano et al.
patent: 5798188 (1998-08-01), Mukohyama et al.
patent: 6180275 (2001-01-01), Braun et al.
patent: 6329450 (2001-12-01), Ogoe et al.
patent: 6727023 (2004-04-01), Ono
patent: 6815485 (2004-11-01), Kamo
patent: 7008991 (2006-03-01), Takagi et al.
patent: 36 33 883 (1995-01-01), None
patent: 0 279 287 (1988-08-01), None
patent: 2004-204004 (2004-07-01), None
G. Wu, T. Miura, S. Asai and M. Sumita, Carbon black-loading induced phase fluctuations in PVDF/PMMA miscible blends: dynamic percolation measurements, Polymer 42 (2001) 3271-3279.
C. del Rio and J. L. Acosta, Extrinsic conducting and superconducting polymer systems: 1. Analysis of the structure of PVDF/PS blends containing copper and carbon black filters, Polymer, vol. 35, No. 17, (1994).
C. del Rio, M. C. Ojeda and J. L. Acosta, Carbon black effect on the microstructure of incompatible polymer blends, European Polymer Journal 36 (2000) 1687-1695.
Available: http://www.polymerprocessing.com/polymers/SMA.html.
Available: http://www.matweb.com/SpecificMaterial.asp?bassnum=O4900&group=General.
Available: http:///www.amco.ws/plastics
ova/dylark.asp.
Available: http://www.amco.ws/plastics
ova/dylark/dylark—332.asp.
Available: http://www.power-technology.com/contractors/fuel/ticonia.
Available: http://www.plasticstechnology.com/articles/200111fa2.html.
Commercial Grades of SMA Resins, ATOFINA Chemicals Inc.
SMA Multi-Functional Resins, Sartomer, 2001 Product Bulletin.
NOVA Chemicals Bold Solutions, Dylark Engineering Resins.
Cai Yuqi
Chopra Divya
Fisher John
E.I. du Pont Canada Company
Kopec Mark
Thomas Jaison P
LandOfFree
Composition and method for making fuel cell collector plates... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Composition and method for making fuel cell collector plates..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Composition and method for making fuel cell collector plates... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4007649