Patent US5746947A successfully refreshed from Google Patents.
US5746947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylbenzotriazole compositions and the use thereof as copper and copper alloy corrosion inhibitors
Assignee: ECC SPECIALTY CHEMICALS Inc
•
Filing: 1990-06-20
•
Granted: 1998-05-05
•
Expires: 2010-06-20
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
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:23
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/149
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
85 words
A method for inhibiting corrosion in an aqueous system comprising adding to said system an effective amount of a composition comprising: a) a compound having the following formula: ##STR2## 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, mercaptobenzothiazole, 1-phenyl-5-mercaptotetrazole, isomers of 1-phenyl-5-mercaptotetrazole, substituted phenyl mercaptotetrazole and salts thereof wherein the weight ratio of a):b) ranges from about 0.01:100 to about 100:1.
Claim 2
Independent Claim
85 words
A method for inhibiting corrosion in an aqueous system comprising adding to said system an effective amount of a composition comprising: a) a compound having the following formula: ##STR2## 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, mercaptobenzothiazole, 1-phenyl-5-mercaptotetrazole, isomers of 1-phenyl-5-mercaptotetrazole, substituted phenyl mercaptotetrazole and salts thereof wherein the weight ratio of a):b) ranges from about 0.01:100 to about 100:1.
Claim 3
Dependent Claim
17 words
The method of claim 1, wherein said aqueous system is in contact with a copper-containing metallic surface.
Claim 4
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 5
Dependent Claim
15 words
The method of claim 1, wherein said compound (b) is tolyltriazole or a salt thereof.
Claim 6
Dependent Claim
12 words
The method of claim 1, wherein said system contains high dissolved solids.
Claim 7
Dependent Claim
10 words
The method of claim 1, wherein said system contains chlorine.
Claim 8
Dependent Claim
13 words
The method of claim 1, wherein a) is butylbenzotriazole, or a salt thereof.
Claim 9
Dependent Claim
17 words
The method of claim 6, wherein said aqueous system is in contact with a copper-containing metallic surface.
Claim 10
Dependent Claim
13 words
The method of claim 3, wherein a) is butylbenzotriazole or a salt thereof.
Claim 11
Dependent Claim
18 words
The method of claim 7, wherein said aqueous system is in contact with a copper containing metallic surface.
Claim 12
Dependent Claim
12 words
The method of claim 8, wherein said system contains high dissolved solids.
Claim 13
Dependent Claim
12 words
The method of claim 10, wherein said system contains high dissolved solids.
Claim 14
Dependent Claim
10 words
The method of claim 8, wherein said system contains chlorine.
Claim 15
Dependent Claim
67 words
A composition comprising: a) a compound having the following formula: ##STR3## 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 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 16
Dependent Claim
67 words
A composition comprising: a) a compound having the following formula: ##STR3## 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 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 17
Dependent Claim
65 words
An aqueous system comprising: a) a compound having the following formula: ##STR4## 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 18
Dependent Claim
65 words
An aqueous system comprising: a) a compound having the following formula: ##STR4## 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 19
Dependent Claim
53 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 C 3 to C 12 alkylbenzotriazole or salt thereof.
Claim 20
Dependent Claim
53 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 C 3 to C 12 alkylbenzotriazole or salt thereof.
Claim 21
Dependent Claim
12 words
The composition of claim 16, wherein said alkyl benzotriazole is butyl benzotriazole.
Claim 22
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)
US2941953A
Cited
US2861078A
Cited
GB1065995A
Cited
US3413227A
Cited
US3342749A
Cited
GB1198312A
Cited
GB1347008A
Cited
US3887481A
Cited
US3803049A
Cited
DE2330340A1
Cited
US3985503A
Cited
US4060491A
Cited
US4188212A
Cited
US4149969A
Cited
US4128065A
Cited
US4219433A
Cited
US4338209A
Cited
US4184991A
Cited
JPS55846A
Cited
US4202796A
Cited
JPS5614287A
Cited
US4255395A
Cited
US4406811A
Cited
JPS5715247A
Cited
JPS5726175A
Cited
US4363913A
Cited
EP0173427A2
Cited
US4744950A
Cited
US4668474A
Cited
US4675158A
Cited
US4613481A
Cited
US4657785A
Cited
US4728452A
Cited
US4686059A
Cited
US4873139A
Cited
EP0462809A1
Cited
US5441563A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-05-04 | 2001-11-03 | 2002-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-04 | 2005-11-03 | 2006-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-04 | 2009-11-03 | 2010-05-05 | $7700.00 | Window Closed / Lapsed |