US4404114A
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Acrylate/silicate corrosion inhibitor
Assignee: Prestone Products Corp USA
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Filing: 1982-06-17
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Granted: 1983-09-13
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Expires: 2002-06-17
Abstract
Abstract An aluminum corrosion inhibitor composition comprising an aqueous and/or alcohol solution of a polymerizable-acid graft copolymer plus at least one organic and/or inorganic silicate, together with a method for using such composition.
Inventors
- 👤 Paul H. Mohr
- 👤 William N. Matulewicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:10
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/20; C23; C23F; C23F11/00; C23F11/08; C23F11/10; Y; Y10; Y10S; Y10S62/00; Y10S62/20
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
226 words
An aluminum corrosion inhibitor composition concentrate comprising; (a) alcohol or water or mixtures thereof; (b) a polymerizable-acid graft copolymer comprising an unsaturated grafting acid and having a percent acid graft of up to about 60% and a base polymer consisting of a poly(oxyalkylene) compound of the formula: R"((OC n H 2n ) z OR') a wherein R' is a member selected from the group consisting of a hydrocarbon radical, a hydrogen atom, or an acyl radical and R" is a member selected from the group consisting of a hydrocarbon radical, a hydrogen atom, an amine-containing radical, or an acyl radical, a is an integer having a value of 1 to about 4, n has a value of 2 to 4 inclusive, z is an integer having a value of from 4 to 2300 inclusive, said base polymer having a number average molecular weight of between about 200 and about 100,000, and (c) a silicate selected from the group consisting of organic silicates, inorganic silicates, and mixtures thereof, and wherein the amount of component (b) is between greater than about 0.01 wt. % and about 20 wt % based on the total amount of component (a) plus component (b) in said concentrate, and wherein the weight ratio of component (b) to component (c) ranges from 8000:1 to 1:20 based on the amount of silicon in component (c).
Claim 2
Dependent Claim
226 words
An aluminum corrosion inhibitor composition concentrate comprising; (a) alcohol or water or mixtures thereof; (b) a polymerizable-acid graft copolymer comprising an unsaturated grafting acid and having a percent acid graft of up to about 60% and a base polymer consisting of a poly(oxyalkylene) compound of the formula: R"((OC n H 2n ) z OR') a wherein R' is a member selected from the group consisting of a hydrocarbon radical, a hydrogen atom, or an acyl radical and R" is a member selected from the group consisting of a hydrocarbon radical, a hydrogen atom, an amine-containing radical, or an acyl radical, a is an integer having a value of 1 to about 4, n has a value of 2 to 4 inclusive, z is an integer having a value of from 4 to 2300 inclusive, said base polymer having a number average molecular weight of between about 200 and about 100,000, and (c) a silicate selected from the group consisting of organic silicates, inorganic silicates, and mixtures thereof, and wherein the amount of component (b) is between greater than about 0.01 wt. % and about 20 wt % based on the total amount of component (a) plus component (b) in said concentrate, and wherein the weight ratio of component (b) to component (c) ranges from 8000:1 to 1:20 based on the amount of silicon in component (c).
Claim 3
Dependent Claim
26 words
The concentrate of claim 1 to which additionally is added: (d) ammonium hydroxide, alkali metal hydroxides, or alkaline earth metal hydroxides; or amines, or mixtures thereof.
Claim 4
Dependent Claim
18 words
The concentrate of claim 2 wherein component (d) is sodium or potassium hydroxide or triethanolamine, or mixtures thereof.
Claim 5
Dependent Claim
30 words
The concentrate of claim 1 wherein component (b) is soluble in component (a) to the extent of at least about 0.01 weight percent based on the weight of the concentrate.
Claim 6
Dependent Claim
11 words
The concentrate of claim 4 wherein component (a) is ethylene glycol.
Claim 7
Dependent Claim
37 words
The concentrate of claim 2 wherein the reaction product of component (b) and component (d) is soluble in component (a) to the extent of at least about 0.01 weight percent based on the weight of the concentrate.
Claim 8
Dependent Claim
20 words
The concentrate of claim 2 wherein the reaction product of component (b) and component (d) is insoluble in component (a).
Claim 9
Dependent Claim
13 words
The concentrate of claim 1 wherein component (b) is insoluble in component (a).
Claim 10
Dependent Claim
44 words
The concentrate of claim 4 wherein component (a) is ethylene glycol, said base polymer is a poly(oxyethylene-oxypropylene) compound having a number average molecular weight between 400 and 10,000, component (d) is sodium hydroxide, and said percent graft is between about 5% and about 20%.
Claim 11
Dependent Claim
31 words
The concentrate of any of claims 1 to 9 wherein component (c) is selected from the group consisting of hydrocarbon orthosilicates, alkali metal salts of silicates and alkanolamine salts of silicates.
Claim 12
Dependent Claim
221 words
An aluminum corrosion inhibitor composition comprising: (a) alcohol, water, and mixtures thereof, (b) a polymerizable-acid graft copolymer comprising an unsaturated grafting acid and having a percent acid graft of up to about 60% and a base polymer consisting of a poly(oxyalkylene) compound of the formula: R"((OC n H 2n ) z OR') a wherein R' is a member selected from the group consisting of a hydrocarbon, a hydrogen atom, or an acyl radical and R" is a member selected from the group consisting of a hydrocarbon a hydrogen atom, an amine-containing, or an acyl radical, a is an integer having a value of 1 to about 4, n has a value of 2 to 4 inclusive, z is an integer having a value of from 4 to 2300 inclusive, said base polymer having a number average molecular weight of between about 200 and about 100,000 and (c) a silicate selected from the group consisting of organic silicates, inorganic silicates, and mixtures thereof, and wherein the amount of component (b) is between greater than about 0.01 wt. % and about 15 wt. % based on the total amount of component (a) plus component (b) in said composition, and wherein the weight ratio of component (b) to component (c) ranges from 8000:1 to 1:20 based on the amount of silicon in component (c).
Claim 13
Dependent Claim
221 words
An aluminum corrosion inhibitor composition comprising: (a) alcohol, water, and mixtures thereof, (b) a polymerizable-acid graft copolymer comprising an unsaturated grafting acid and having a percent acid graft of up to about 60% and a base polymer consisting of a poly(oxyalkylene) compound of the formula: R"((OC n H 2n ) z OR') a wherein R' is a member selected from the group consisting of a hydrocarbon, a hydrogen atom, or an acyl radical and R" is a member selected from the group consisting of a hydrocarbon a hydrogen atom, an amine-containing, or an acyl radical, a is an integer having a value of 1 to about 4, n has a value of 2 to 4 inclusive, z is an integer having a value of from 4 to 2300 inclusive, said base polymer having a number average molecular weight of between about 200 and about 100,000 and (c) a silicate selected from the group consisting of organic silicates, inorganic silicates, and mixtures thereof, and wherein the amount of component (b) is between greater than about 0.01 wt. % and about 15 wt. % based on the total amount of component (a) plus component (b) in said composition, and wherein the weight ratio of component (b) to component (c) ranges from 8000:1 to 1:20 based on the amount of silicon in component (c).
Claim 14
Dependent Claim
23 words
The composition of claim 11 to which additionally is added: (d) ammonium hydroxide, alkali metal hydroxides, or alkaline earth metal hydroxides; or amines.
Claim 15
Dependent Claim
15 words
The composition of claim 12 wherein component (d) is sodium or potassium hydroxide or triethanolamine.
Claim 16
Dependent Claim
29 words
The composition of claim 11 wherein component (b) is soluble in component (a) to the extent at least about 0.01 weight percent based on the weight of the composition.
Claim 17
Dependent Claim
11 words
The composition of claim 14 wherein component (a) is ethylene glycol.
Claim 18
Dependent Claim
37 words
The composition of claim 12 wherein the reaction product of component (b) and component (d) is soluble in component (a) to the extent of at least about 0.01 weight percent based on the weight of the composition.
Claim 19
Dependent Claim
20 words
The composition of claim 12 wherein the reaction product of component (b) and component (d) is insoluble in component (a).
Claim 20
Dependent Claim
13 words
The composition of claim 11 wherein component (b) is insoluble in component (a).
Claim 21
Dependent Claim
44 words
The composition of claim 14 wherein component (a) is ethylene glycol, component (c) is sodium hydroxide, said base polymer is a poly(oxyethylene-oxypropylene) compound having a number average molecular weight between 400 and 10,000, and said percent graft is between about 5% and about 20%.
Claim 22
Dependent Claim
31 words
The concentrate of any of claims 1 to 9 wherein component (c) is selected from the group consisting of hydrocarbon orthosilicates, alkali metal salts of silicates and alkanolamine salts of silicates.
Claim 23
Independent Claim
229 words
A method for providing aluminum-corrosion inhibition in an aluminum component heat transfer system which comprises filling said system with a composition comprising: (a) alcohol or water or mixtures thereof, and (b) a polymerizable-acid graft copolymer comprising an unsaturated grafting acid and having a percent acid graft of up to about 60% and a base polymer consisting of a poly(oxyalkylene) compound of the formula: R"((OC n H 2n ) z OR') a wherein R' is a member from the group consisting of a hydrocarbon radical, a hydrogen atom, or an acyl radical and R" is a member selected from the group consisting of a hydrocarbon radical, a hydrogen atom, an amine-containing radical, or an acyl radical, a is an integer having a value of 1 to about 4, n has a value of 2 to 4 inclusive, z is an integer having a value of from 4 to 2300 inclusive, said base polymer having a number average molecular weight of between about 200 and about 100,000 and (c) an organic or inorganic silicate and wherein the amount of component (b) is between about 0.01 wt. % and about 15 wt. % based on the total amount of component (a) plus component (b) in said composition, and wherein the weight ratio of component (b) to component (c) ranges from 8000:1 to 1:20 based on the amount of silicon in component (c).
Claim 24
Independent Claim
229 words
A method for providing aluminum-corrosion inhibition in an aluminum component heat transfer system which comprises filling said system with a composition comprising: (a) alcohol or water or mixtures thereof, and (b) a polymerizable-acid graft copolymer comprising an unsaturated grafting acid and having a percent acid graft of up to about 60% and a base polymer consisting of a poly(oxyalkylene) compound of the formula: R"((OC n H 2n ) z OR') a wherein R' is a member from the group consisting of a hydrocarbon radical, a hydrogen atom, or an acyl radical and R" is a member selected from the group consisting of a hydrocarbon radical, a hydrogen atom, an amine-containing radical, or an acyl radical, a is an integer having a value of 1 to about 4, n has a value of 2 to 4 inclusive, z is an integer having a value of from 4 to 2300 inclusive, said base polymer having a number average molecular weight of between about 200 and about 100,000 and (c) an organic or inorganic silicate and wherein the amount of component (b) is between about 0.01 wt. % and about 15 wt. % based on the total amount of component (a) plus component (b) in said composition, and wherein the weight ratio of component (b) to component (c) ranges from 8000:1 to 1:20 based on the amount of silicon in component (c).
Claim 25
Dependent Claim
28 words
The method of claim 21 which comprises the additional step of adding to said composition: (d) ammonium hydroxide, alkali metal hydroxides, or alkaline earth metal hydroxides; or amines.
Claim 26
Dependent Claim
15 words
The method of claim 22 wherein component (d) is sodium or potassium hydroxide or triethanolamine.
Claim 27
Dependent Claim
29 words
The method of claim 21 wherein component (b) is soluble in component (a) to the extent at least about 0.01 weight percent based on the weight of the composition.
Claim 28
Dependent Claim
11 words
The method of claim 24 wherein component (a) is ethylene glycol.
Claim 29
Dependent Claim
37 words
The method of claim 22 wherein the reaction product of component (b) and component (d) is soluble in component (a) to the extent of at least about 0.01 weight percent based on the weight of the composition.
Claim 30
Dependent Claim
20 words
The method of claim 22 wherein the reaction product of component (b) and component (d) is insoluble in component (a).
Claim 31
Dependent Claim
13 words
The method of claim 21 wherein component (b) is insoluble in component (a).
Claim 32
Dependent Claim
44 words
The method of claim 21 wherein component (a) is ethylene glycol, component (d) is sodium hydroxide, said base polymer is a poly(oxyethylene-oxypropylene) compound having a number average molecular weight between 400 and 10,000, and said percent graft is between about 5% and about 20%.
Claim 33
Independent Claim
31 words
The method of any of claims 21 to 29 wherein component (c) is selected from the group consisting of hydrocarbon orthosilicates, alkali metal salts of silicates and alkanolamine salts of silicates.
Claim 34
Dependent Claim
14 words
The method of claim 21 wherein said heat transfer system is a cooling system.
Claim 35
Dependent Claim
38 words
The concentrate of claim 1 wherein the amount of component (b) is between about 0.1 wt. % and about 15 wt. % and is based on the total amount of component (a) plus component (b) in said concentrate.
Claim 36
Dependent Claim
38 words
The method of claim 21 wherein the amount of component (b) is between about 0.1 wt. % and about 15 wt. % and is based on the total amount of component (a) plus component (b) in said composition.
Claim 37
Dependent Claim
29 words
The method of claim 21 wherein the weight ratio of component (b) to component (c) ranges from 200:1 to 1:1.5 based on the amount of silicon in component (c).
Claim 38
Dependent Claim
26 words
The concentrate of any of claims 1 to 9 which additionally contains a silicone stabilizer in an amount sufficient to stabilize component (c) in said concentrate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-12 | 1987-03-14 | 1987-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-12 | 1991-03-14 | 1991-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-12 | 1995-03-14 | 1995-09-13 | $7700.00 | Window Closed / Lapsed |