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US 4,404,114 AGranted
Acrylate/silicate corrosion inhibitor
AssigneeUnion Carbide Corporation
InventorsPaul H. Mohr, William N. Matulewicz
Life of this patent
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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.
Claims35
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.sub.n H.sub.2n).sub.z OR').sub.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).
1 more element
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.sub.n H.sub.2n).sub.z OR').sub.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).
1 more element
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.sub.n H.sub.2n).sub.z OR').sub.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).
1 more element
Dependencies are inferred from the claim text.