IP Library › Granted Patent US 7,211,204
Granted Patent B2
US 7,211,204 · App. 10/735,424 · Granted May 1, 2007

Additives to stop copper attack by alkaline etching agents such as ammonia and monoethanol amine (MEA)

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Quick Facts
Patent No.
US 7,211,204
App. No.
10/735,424
Granted
May 1, 2007
Kind
B2
Abstract

A corrosive composition, such as an alkaline aqueous carbon dispersion, a cleaner, a cleaner conditioner, or a conditioner, comprises a corrosion inhibitor, e.g., benzotriazole. The corrosion inhibitor is present in an amount effective to reduce or stop the dissolution of metal from a metallic surface, such as a printed circuit board, in contact with the composition. A method to reduce or stop the dissolution of metal from a metallic surface in contact with a corrosive composition, and a method to stabilize or recover a corrosive composition containing metal contaminants by adding an effective amount of a corrosion inhibitor to the corrosive composition.

Claims (12)

1. A composition comprising:

A. from about 0.1 to about 25% by weight of graphite;

B. from about 0.01 to about 10% by weight of a water dispersible binding agent for binding to said graphite, wherein said water dispersible binding agent is selected from the group consisting of monosaccharides, polysaccharide, and combinations thereof; and

C. a corrosion inhibitor, wherein said corrosion inhibitor is present in an amount effective to reduce the dissolution of metal from a metallic surface in contact with said composition, wherein said graphite and corrosion inhibitor are dispersed in water.

2. The composition of claim 1 , further comprising carbon black.

3. The composition of claim 1 wherein said corrosion inhibitor is present in an amount effective to prevent the dissolution of metal from said metallic surface in contact with said composition.

4. The composition of claim 1 wherein said amount of said corrosion inhibitor is from about 1 ppm to about 1% by weight.

5. The composition of claim 1 wherein said amount of said corrosion inhibitor is from about 50 ppm to about 4000 ppm.

6. The composition of claim 1 wherein said amount of said corrosion inhibitor is from about 200 ppm to about 600 ppm.

7. The composition of claim 1 wherein said corrosion inhibitor is at least one of an imidazole, a triazole, an indole, an azole, a thiazole, or a tetrazole.

8. The composition of claim 1 wherein said corrosion inhibitor is benzotriazole or tolyltriazole.

9. The composition of claim 1 wherein said metal is copper.

Assignments (12)
MERGER Recorded Jan 19, 2021
From: MACDERMID ENTHONE AMERICA LLC
To: MACDERMID, INCORPORATED
Reel/Frame 054951/0889 →
CHANGE OF NAME Recorded Feb 15, 2019
From: OMG ELECTRONIC CHEMICALS, LLC
To: MACDERMID ENTHONE AMERICA LLC
Reel/Frame 048356/0593 →
PATENT SECURITY AGREEMENT Recorded Feb 1, 2016
From: OMG ELECTRONIC CHEMICALS, LLC
To: BARCLAYS BANK PLC, AS COLLATERAL AGENT
Reel/Frame 037662/0086 →
TERMINATION AND RELEASE OF SECURITY INTEREST IN PATENTS Recorded Oct 28, 2015
From: PNC BANK
To: OMG ELECTRONIC CHEMICALS, LLC
Reel/Frame 036985/0566 →
SECURITY AGREEMENT Recorded Sep 12, 2013
From: OM GROUP, INC.; OMG ELECTRONIC CHEMICALS, LLC; OMG AMERICAS, INC.; EAGLEPICHER TECHNOLOGIES, LLC; EAGLEPICHER MEDICAL POWER, LLC
To: PNC BANK
Reel/Frame 031208/0876 →
RELEASE OF SECURITY INTEREST Recorded Sep 5, 2013
From: BANK OF AMERICA, N.A.
To: OM GROUP, INC.; EAGLEPICHER TECHNOLOGIES, LLC; EAGLEPICHER MEDICAL POWER, LLC; OMG AMERICAS, INC.; OMG ELECTRONIC CHEMICALS, LLC
Reel/Frame 031169/0976 →
SECURITY AGREEMENT Recorded Aug 12, 2011
From: OM GROUP, INC., A DELAWARE CORPORATION; COMPUGRAPHICS U.S.A. INC., A DELAWARE CORPORATION; CYANTEK CORPORATION, A DELAWARE CORPORATION; OMG AMERICAS, INC., A OHIO CORPORATION; OMG ELECTRONIC CHEMICALS, LLC, A DELAWARE LIMITED LIABILITY COMPANY; OMG ENERGY HOLDINGS, INC., A DELAWARE CORPORATION; OMG HARKO HOLDINGS, LLC, A DELAWARE LIMITED LIABILITY COMPANY; EAGLEPICHER MEDICAL POWER, LLC, A DELAWARE LIMITED LIABILITY COMPANY; EAGLEPICHER TECHNOLOGIES, LLC, A DELAWARE LIMITED LIABILITY COMPANY; EPEP HOLDING COMPANY, LLC, A DELAWARE LIMITED LIABILITY COMPANY
To: BANK OF AMERICA, N.A., AS COLLATERAL AGENT
Reel/Frame 026740/0353 →
PATENT RELEASE AGREEMENT Recorded Aug 10, 2011
From: PNC BANK, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT
To: OM GROUP, INC., A DELAWARE CORPORATION; OMG AMERICAS, INC., A OHIO CORPORATION; OMG ELECTRONIC CHEMICALS, INC., A DELAWARE LIMITED LIABILITY COMPANY; COMPUGRAPHICS U.S.A. INC., A DELAWARE CORPORATION; OMG ENERGY HOLDINGS, INC., A DELAWARE CORPORATION; EAGLEPICHER TECHNOLOGIES, LLC, A DELAWARE LIMITED LIABILITY COMPANY; EPEP HOLDING COMPANY, LLC, A DELAWARE LIMITED LIABILITY COMPANY; EAGLEPICHER MEDICAL POWER, LLC, A DELAWARE LIMITED LIABILITY COMPANY
Reel/Frame 026727/0485 →
CHANGE OF NAME Recorded Aug 11, 2010
From: OMG ELECTRONIC CHEMICALS, INC.
To: OMG ELECTRONIC CHEMICALS, LLC
Reel/Frame 024812/0920 →
SECURITY AGREEMENT Recorded Mar 11, 2010
From: OM GROUP, INC.; OMG AMERICAS, INC.; OMG ELECTRONIC CHEMICALS, INC.; COMPUGRAPHICS U.S.A. INC.; OM HOLDINGS, INC.; OMG ENERGY HOLDINGS, INC.; EAGLEPICHER TECHNOLOGIES, LLC; EPEP HOLDING COMPANY, LLC; EAGLEPICHER MEDICAL POWER, LLC
To: PNC BANK, NATIONAL ASSOCIATION
Reel/Frame 024066/0130 →
MERGER Recorded Jan 14, 2009
From: ELECTROCHEMICALS INC.; OMG FIDELITY, INC.
To: OMG ELECTRONIC CHEMICALS, INC.
Reel/Frame 022102/0711 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 12, 2003
From: BERNARDS, ROGER FRANCIS; LAFAYETTE, BETH ANN; PHAM, THAO
To: ELECTROCHEMICALS, INC.
Reel/Frame 014800/0305 →