IP Library › Granted Patent US 6,933,333
Granted Patent B2
US 6,933,333 · App. 10/458,038 · Granted Aug 23, 2005

Conductive adhesive sealant for bipolar fuel cell separator plate assemblies

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Quick Facts
Patent No.
US 6,933,333
App. No.
10/458,038
Granted
Aug 23, 2005
Kind
B2
Abstract

A conductive adhesive sealant comprising vinyl ester resin or polyester resin, graphite powder, peroxide free-radical initiator, milled carbon fiber, and a quinone-based inhibitor such as para benzoquinone.

Claims (22)

1. a liquid conductive adhesive sealant for bipolar fuel cell separator plate assemblies, comprising:

(a) approximately 35% to 80% by weight of thermosetting vinyl ester resin,

(b) approximately 10% to 35% by weight of graphite powder,

(c) approximately 0.1% to 10% by weight of a peroxide free-radical initiator based on the weight of said thermosetting resin,

(d) approximately 2% to 20% by weight of milled carbon fiber based on the weight of said thermosetting resin.

2. A conductive adhesive sealant according to claim 1 , wherein:

(e) said thermosetting resin has a viscosity less than 20,000 cps as measured with a Brookfield viscometer using a T-bar “B” at 20 rpm.

3. A conductive adhesive sealant according to claim 1 , wherein:

(e) said graphite powder has a median particle size less than 100 microns.

4. A conductive adhesive sealant according to claim 1 , wherein:

(e) said milled carbon fiber has a median length less than ¼ inch.

5. A liquid conductive adhesive sealant for bipolar fuel cell separator plate assemblies, comprising:

(a) approximately 66% by weight of thermosetting vinyl ester resin,

(b) approximately 25% by weight of graphite powder,

(c) approximately 2% by weight of peroxide free-radical initiator,

(d) approximately 6% by weight of milled carbon fiber.

6. A conductive adhesive sealant according to claim 5 , wherein:

(e) said thermosetting resin has a viscosity less than 20,000 cps as measured with a Brookfield viscometer using a T-bar “B” at 20 rpm.

7. A conductive adhesive sealant according to claim 5 , wherein:

(e) said graphite powder has a median particle size less than 100 microns.

8. A conductive adhesive sealant according to claim 5 , wherein:

(e) said milled carbon fiber has a median length less than ¼ inch.

Assignments (5)
RELEASE OF SECURITY INTEREST Recorded Aug 21, 2018
From: JPMORGAN CHASE BANK, N.A.
To: A. SCHULMAN, INC.; PREMIX, INC.; BULK MOLDING COMPOUNDS, INC.; QUANTUM COMPOSITES, INC.
Reel/Frame 046883/0607 →
SECURITY AGREEMENT Recorded Jun 2, 2015
From: A. SCHULMAN, INC.; BULK MOLDING COMPOUNDS, INC.
To: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
Reel/Frame 035808/0027 →
RELEASE OF SECURITY INTEREST Recorded Jun 1, 2015
From: GENERAL ELECTRIC CAPITAL CORPORATION, AS AGENT
To: CITADEL PLASTICS HOLDINGS, INC.; CITADEL INTERMEDIATE HOLDINGS, LLC; THE MATRIXX GROUP, INCORPORATED; BULK MOLDING COMPOUNDS, INC.; HGGC CITADEL PLASTICS INTERMEDIATE HOLDINGS, INC.; PREMIX, INC.; QUANTUM COMPOSITES, INC.
Reel/Frame 035756/0526 →
RELEASE OF SECURITY INTEREST Recorded Jun 1, 2015
From: GENERAL ELECTRIC CAPITAL CORPORATION, AS AGENT
To: BULK MOLDING COMPOUNDS, INC.; PREMIX, INC.; QUANTUM COMPOSITES, INC.
Reel/Frame 035756/0985 →
SECURITY INTEREST Recorded Nov 26, 2014
From: BULK MOLDING COMPOUNDS, INC.; PREMIX, INC.; QUANTUM COMPOSITES, INC.
To: GENERAL ELECTRIC CAPITAL CORPORATION, AS AGENT
Reel/Frame 034478/0787 →