EP0462809A1
Expired / Lapsed
EP
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Method of inhibiting corrosion of copper and copper alloy with alkylbenzotriazole compositions
Assignee: Ecc Specialty Chemicals Inc english China Clays
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Filing: 1991-06-18
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Granted: —
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Expires: 2011-06-18
Abstract
Abstract An alkylbenzotriazole, in combination with mercaptobenzotriazole, tolyltriazole, benzotriazole and/or 1-phenyl-5-mercaptotetrazole, is used to inhibit the corrosion of metallic surfaces, particularly copper surfaces, in contact with an aqueous system. Systems and compositions are also claimed.
Inventors
- 👤 Daniel P. Vanderpool
- 👤 Charles Y. Cha
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 22:50
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/149
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
76 words
A method for inhibiting corrosion in an aqueous system which is in contact with a metallic surface, comprising adding to said system an effective amount of a composition comprising: a) a compound having the following formula: wherein n is greater than 3 and less than equal to 12; and b) a compound selected from the group consisting of tolyltriazole, benzotriazole, mercaptobenzotriazole, and 1-phenyl-5-mercaptotetrazole wherein the weight ratio of a):b) ranges from about 0.1:99.9 to about 99.9:0.1
Claim 2
Dependent Claim
32 words
The method of Claim 1, wherein at least about 0.1 ppm of said composition is added to said aqueous system, based on the total weight of the water in said aqueous system.
Claim 3
Dependent Claim
11 words
The method of Claim 1, wherein said compound (b) is tolyltriazole.
Claim 4
Dependent Claim
11 words
The method of Claim 1, wherein said system contains high solids.
Claim 5
Dependent Claim
13 words
The method of Claim 3, wherein a) is butylbenzotriazole or a salt thereof.
Claim 6
Dependent Claim
67 words
A composition comprising: a) a compound having the following formula: , or a salt thereof, wherein n is greater than or equal to 3 ant less than or equal to 12; and b) a compound selected from the group consisting of tolyltriazole, benzotriazole, mercaptobenzotriazole, 1-phenyl-5-mercaptotetrazole isomers of 1-phenyl-5-mercaptotetrazole, substituted phenyl mercaptotetrazoles and salts thereof, wherein the weight ratio of a):b) ranges from about 0.01:100 to about 100:1.
Claim 7
Dependent Claim
65 words
An aqueous system comprising: a) a compound having the following formula: , or a salt thereof, wherein n is greater than or equal to 3 and less than or equal to 12; and b) a compound selected from the group consisting of tolyltriazole, benzotriazole, mercaptobenzotriazole, 1-phenyl-5-mercaptotetrazole and salts thereof, wherein the weight ratio of a):b) ranges from about 0.01:100 to about 100:1 and c) water.
Claim 8
Dependent Claim
51 words
A composition comprising a copper corrosion inhibitor selected from the group consisting of tolyltriazole, benzotriazole, mercaptobenzothiazole, 1-phenyl-5-mercaptotetrazole, isomers of 1-phenyl-5-mercaptotetrazole, substituted phenyl mercaptotetrazoles, and salts thereof and an effective amount for the purpose of improving the effectiveness of said copper corrosion inhibitor of a C₃ to C₁₂ alkylbenzotriazole or salt thereof.
Claim 9
Dependent Claim
12 words
The composition of Claim 16, wherein said alkyl benzotriazole is butyl benzotriazole.
Claim 10
Dependent Claim
37 words
The composition of Claim 17, wherein said copper corrosion inhibitor is selected from the group consisting of tolyltriazole and salts thereof, and wherein said composition contains at least about 0.001 part butyl benzotriazole per part alkyl benzotriazole.
References Cited (Backward Citations)
FR2141817A1
Cited
EP0173427A2
Cited
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