US4711735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coolant additive with corrosion inhibitive and scale preventative properties
Assignee: Individual
•
Filing: 1986-09-12
•
Granted: 1987-12-08
•
Expires: 2006-09-12
Abstract
Abstract Disclosed herein is an improved coolant additive having corrosion inhibitive and scale preventative properties. In particular, the inventive additive in its various embodiments is specifically designed to avoid the use of silicates which, as is well known, form deposits which coat the surfaces and passageways of heavy duty diesel and other cooling systems, resulting in shortened life and reduced efficiency thereof. The inventive additive includes sodium hydroxide and/or alkal metal carbonate, ricinoleic acid, Reomet 41, Thiotax, various forms of SMA copolymers, sodium benzoate, sodium nitrate, chelant(s), antifoam agents, dye/pH indicator and soft water (composition solvent), mixed together in predetermined proportions with the various embodiments of the inventive additive including other constituent substances.
Inventors
- 👤 Harold J. Gulley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:35
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/12; C02F5/125; C09; C09K; C09K5/00; C09K5/20; C23; C23F; C23F11/00; C23F11/08
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
109 words
An additive for addition to a fluid mixture comprising the coolant fluid for an engine comprising, by weight: from about 0.017 to about 0.42 percent ricinoleic acid, from about 0.007 to about 0.083 percent moiety of benzotriazole, from about 0.50 to about 1.5 percent mercaptobenzothiazole, from about 0.17 to about 4 percent styrene maleic anhydride with a molecular weight of between 200 and 3500, from about 0.42 to 2 percent benzoic acid, from about 0.42 to about 4.0 percent benzoate ion, from about 0.33 to about 3.3 percent nitrite ion, from about 0.37 to about 3.7 percent nitrate ion and from about 0.42 to about 3 percent carboxymethylmercaptosuccinic acid.
Claim 2
Dependent Claim
109 words
An additive for addition to a fluid mixture comprising the coolant fluid for an engine comprising, by weight: from about 0.017 to about 0.42 percent ricinoleic acid, from about 0.007 to about 0.083 percent moiety of benzotriazole, from about 0.50 to about 1.5 percent mercaptobenzothiazole, from about 0.17 to about 4 percent styrene maleic anhydride with a molecular weight of between 200 and 3500, from about 0.42 to 2 percent benzoic acid, from about 0.42 to about 4.0 percent benzoate ion, from about 0.33 to about 3.3 percent nitrite ion, from about 0.37 to about 3.7 percent nitrate ion and from about 0.42 to about 3 percent carboxymethylmercaptosuccinic acid.
Claim 3
Dependent Claim
117 words
An additive for addition to a fluid mixture comprising the coolant fluid for an engine comprising, by weight: about 2 percent sebacic acid, practical, about 0.2 percent ethoxylated nonylphenol, about 0.5 percent styrene maleic anhydride with a molecular weight of between 200 and 3500, about 0.1 percent polyoxyalkylene glycol, about 0.05 percent polypropylene glycol 1025, about 1.25 percent disodium tetraborate, 5 Mol. H 2 O, about 7.05 percent sodium hydroxide 50%, and 0.6 percent ricinoleic acid, practical, about 1 percent mercaptobenzothiazole, dry 2-MBT (Azole), about 1.5 percent sodium benzoate, about 0.23 percent moiety of benzotriazole, about 2 percent sodium sarcosine, about 1.5 percent sodium nitrate, about 0.02 percent, about 0.8 percent N-benzylethanolamine and about 0.05 percent phenolphthalein.
Claim 4
Dependent Claim
117 words
An additive for addition to a fluid mixture comprising the coolant fluid for an engine comprising, by weight: about 2 percent sebacic acid, practical, about 0.2 percent ethoxylated nonylphenol, about 0.5 percent styrene maleic anhydride with a molecular weight of between 200 and 3500, about 0.1 percent polyoxyalkylene glycol, about 0.05 percent polypropylene glycol 1025, about 1.25 percent disodium tetraborate, 5 Mol. H 2 O, about 7.05 percent sodium hydroxide 50%, and 0.6 percent ricinoleic acid, practical, about 1 percent mercaptobenzothiazole, dry 2-MBT (Azole), about 1.5 percent sodium benzoate, about 0.23 percent moiety of benzotriazole, about 2 percent sodium sarcosine, about 1.5 percent sodium nitrate, about 0.02 percent, about 0.8 percent N-benzylethanolamine and about 0.05 percent phenolphthalein.
Claim 5
Dependent Claim
103 words
An additive for addition to a fluid mixture comprising the coolant fluid for an engine comprising, by weight: about 0.2 percent ricinoleic acid, practical, about 0.15 percent moiety of benzotriazole, about 6.9 percent sodium hydroxide, about 1 percent mercaptobenzothiazole, about 0.2 percent ethoxylated surfactant, about 0.5 percent styrene maleic anhydride with a molecular weight of between 200 and 3500, about 0.4 percent sodium dodecylbenzene sulfonate, about 1.5 percent benzoic acid, about 2.50 percent sodium benzoate, about 0.4 percent sodium nitrite, about 4 percent sodium nitrate, abut 4.25 percent carboxymethylmercaptosuccinic acid, about 0.8 percent N-benzylethanolamine, about 0.1 percent polyoxyalkylene glycol, about 0.05 percent phenolphthalein.
Claim 6
Dependent Claim
103 words
An additive for addition to a fluid mixture comprising the coolant fluid for an engine comprising, by weight: about 0.2 percent ricinoleic acid, practical, about 0.15 percent moiety of benzotriazole, about 6.9 percent sodium hydroxide, about 1 percent mercaptobenzothiazole, about 0.2 percent ethoxylated surfactant, about 0.5 percent styrene maleic anhydride with a molecular weight of between 200 and 3500, about 0.4 percent sodium dodecylbenzene sulfonate, about 1.5 percent benzoic acid, about 2.50 percent sodium benzoate, about 0.4 percent sodium nitrite, about 4 percent sodium nitrate, abut 4.25 percent carboxymethylmercaptosuccinic acid, about 0.8 percent N-benzylethanolamine, about 0.1 percent polyoxyalkylene glycol, about 0.05 percent phenolphthalein.
Claim 7
Dependent Claim
112 words
A scale preventive, deposition resistant, aqueous composition comprising a scale preventive system, said preventive system including in weight percent based on said aqueous composition: from about 0.170 to about 4.0 percent Styrene Maleic Anhydride-copolymer having a molecular weight of from 200 to 3500, modified amide/imide; further including a corrosion inhibitor system including, in weight percent based on an aqueous composition, from about 0.170 to about 0.420 percent ricinoleic acid and/or its derivatives, from about 0.007 to about 0.083 percent triazole moiety of benzotriazole, from about 0.50 to about 1.50 percent thiazole or mercaptobenzothiazole, from about 0.42 to about 4.0 percent benzoate ion and from about 0.33 to about 3.30 percent nitrate ion.
Claim 8
Dependent Claim
112 words
A scale preventive, deposition resistant, aqueous composition comprising a scale preventive system, said preventive system including in weight percent based on said aqueous composition: from about 0.170 to about 4.0 percent Styrene Maleic Anhydride-copolymer having a molecular weight of from 200 to 3500, modified amide/imide; further including a corrosion inhibitor system including, in weight percent based on an aqueous composition, from about 0.170 to about 0.420 percent ricinoleic acid and/or its derivatives, from about 0.007 to about 0.083 percent triazole moiety of benzotriazole, from about 0.50 to about 1.50 percent thiazole or mercaptobenzothiazole, from about 0.42 to about 4.0 percent benzoate ion and from about 0.33 to about 3.30 percent nitrate ion.
Claim 9
Dependent Claim
25 words
A composition of claim 4 which further includes, in weight percent based on an aqueous composition, from about 0.420 to about 3.0 percent carboxymethylmercaptosuccinic acid.
Claim 10
Dependent Claim
21 words
A composition of claim 5 in which the alkali metal is taken from the group consisting of sodium, lithium and potassium.
Claim 11
Dependent Claim
16 words
A composition of claim 5 further including, from about 0.042 to about 2.0 percent benzoic acid.
Claim 12
Dependent Claim
80 words
A composition of claim 4 which further includes a corrosion inhibitor system including, in weight percent based on an aqueous composition; from about 0.17 to about 3.0 percent sebacic acid and/or alkali metal sebacate, from about 0.42 to about 3.0 percent alkali metal sarcosinate, from about 0.017 to about 0.42 percent ricinoleic acid, from about 0.007 to about 0.083 percent moiety of benzotriazole, from about 0.50 to about 1.50 percent mercaptobenzothiazole, from about 0.42 to about 4.0 percent benzoate ion.
Claim 13
Dependent Claim
23 words
A composition as claimed in claim 8 in which the alkali metal is taken from a group consisting of sodium, lithium and potassium.
Claim 14
Dependent Claim
21 words
A composition as claimed in claim 8 which further includes, from about 0.37 to about 3.70 percent alkali metal nitrate ion.
Claim 15
Dependent Claim
79 words
A composition of claim 4 which further includes a corrosion inhibitor system including, in weight percent based on an aqueous composition: from about 0.17 to about 3.0 percent sebacic acid and/or alkali metal sebacate, from about 0.42 to about 3.0 percent N-acylated Sarcosines, from about 0.017 to about 0.42 percent ricinoleic acid, from about 0.007 to about 0.083 percent Moiety of Benzotriazole, from about 0.50 to about 1.50 percent mercaptobenzothiazole, from about 0.42 to about 4.0 percent benzoate ion.
Claim 16
Dependent Claim
23 words
A composition as claimed in claim 11 in which the alkali metal is taken from the group consisting of sodium, lithium and potassium.
Claim 17
Dependent Claim
21 words
A composition as claimed in claim 12 which further includes, from about 0.37 to about 3.70 percent alkali metal nitrate ion.
Claim 18
Dependent Claim
91 words
A composition of claim 4 which further includes a corrosion inhibitor system including, in weight percent based on an aqueous composition: from about 0.42 to about 3.0 percent carboxymethylthiosuccinic acid, from about 0.017 to about 0.42 percent ricinoleic acid, from about 0.007 to about 0.83 percent Moiety of Benzotriazole, from about 0.50 to about 1.50 percent mercaptobenzothiazole, from about 0.42 to about 4.0 percent benzoate ion technical grade, from about 0.33 to about 3.3 percent Nitrite ion, from about 0.083 to about 3.0 percent alkyl benzene sulfonate/linear alkyl aryl sulfonic acid.
Claim 19
Dependent Claim
23 words
A composition as claimed in claim 14 in which the alkali metal is taken from the group consisting of sodium, lithium and potassium.
Claim 20
Dependent Claim
21 words
A composition as claimed in claim 15 which further includes, from about 0.37 to about 3.70 percent alkali metal nitrate ion.
Claim 21
Dependent Claim
19 words
A composition as claimed in claim 15 which further includes from about 0.042 to about 2.0 percent benzoic acid.
References Cited (Backward Citations)
US2386183A
Cited
US2723956A
Cited
US2972581A
Cited
US2937145A
Cited
US4105592A
Cited
US3959166A
Cited
US4382008A
Cited
US4446045A
Cited
US4495336A
Cited
US4495336B1
Cited
US4587028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-07 | 1991-06-08 | 1991-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-07 | 1995-06-08 | 1995-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-07 | 1999-06-08 | 1999-12-08 | $7700.00 | Window Closed / Lapsed |