US4469611A
Expired / Lapsed
US
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Water-based hydraulic fluids
Assignee: Dow Chemical Co
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Filing: 1982-11-01
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Granted: 1984-09-04
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Expires: 2002-11-01
Abstract
Abstract Substantially oil-free aqueous industrial fluids possess superior lubricating and wear preventing characteristics and are useful as hydraulic fluids and metalworking compositions. Fluids of the invention comprise (1) an aqueous liquid and (2) a water-soluble synthetic addition copolymer of (a) an ethylenically unsaturated polyalkyleneoxy containing monomer, (b) an ethylenically unsaturated water-soluble monomer and, optionally, (c) an ethylenically unsaturated water-insoluble monomer. The industrial fluids exhibit good Newtonian behavior and mechanical stability at higher shear.
Inventors
- 👤 Kenneth L. Snyder, Jr.
- 👤 William H. Keskey
- 👤 Nitis Sarkar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:32
CPC Classifications
C; C10; C10M; C10M173/00; C10M173/02; C10M145/00; C10M145/02; C10M147/00; C10M149/00; C10M149/02; C10M151/00; C10M151/02; C10M2209/00; C10M2209/02; C10M2213/00; C10M2213/02; C10M2213/06; C10M2213/062; C10M2217/00; C10M2217/02; C10M2221/00; C10M2221/02
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
72 words
A substantially oil-free hydraulic fluid or metalworking composition which maintains an essentially Newtonian and shear stable viscosity comprising an aqueous liquid and a thickening amount of a water-soluble synthetic addition copolymer consisting essentially of the reaction product of an ethylenically unsaturated polyalkyleneoxy containing monomer, a water-soluble ethylenically unsaturated monomer and a water-insoluble ethylenically unsaturated monomer such that the visocisty of said composition approaches that of an oil-based hydraulic fluid or metalworking composition.
Claim 2
Dependent Claim
72 words
A substantially oil-free hydraulic fluid or metalworking composition which maintains an essentially Newtonian and shear stable viscosity comprising an aqueous liquid and a thickening amount of a water-soluble synthetic addition copolymer consisting essentially of the reaction product of an ethylenically unsaturated polyalkyleneoxy containing monomer, a water-soluble ethylenically unsaturated monomer and a water-insoluble ethylenically unsaturated monomer such that the visocisty of said composition approaches that of an oil-based hydraulic fluid or metalworking composition.
Claim 3
Dependent Claim
67 words
A substantially oil-free hydraulic fluid or metalworking composition which maintains an essentially Newtonian and shear stable visocisty comprising an aqueous liquid and a thickening amount of a water-soluble synthetic addition copolymer consisting essentially of the reaction product of an ethylenically unsaturated polyalkyleneoxy containing monomer and a water-soluble ethylenically unsaturated monomer such that the viscosity of said composition approaches that of an oil-based hydrualic fluid or metalworking composition.
Claim 4
Dependent Claim
67 words
A substantially oil-free hydraulic fluid or metalworking composition which maintains an essentially Newtonian and shear stable visocisty comprising an aqueous liquid and a thickening amount of a water-soluble synthetic addition copolymer consisting essentially of the reaction product of an ethylenically unsaturated polyalkyleneoxy containing monomer and a water-soluble ethylenically unsaturated monomer such that the viscosity of said composition approaches that of an oil-based hydrualic fluid or metalworking composition.
Claim 5
Dependent Claim
83 words
A substantially oil-free hydraulic fluid or metalworking composition of claim 1 comprising about 80 to 90 weight percent of an aqueous liquid and about 1 to about 20 weight percent of a water-soluble synthetic addition copolymer consisting essentially of (1) about 5 to about 25 weight percent of an ethylenically unsaturated, polyalkyleneoxy containing monomer, (2) about 35 to about 94 weight percent of a water-soluble ethylenically unsaturated monomer and (3) about 1 to about 55 weight percent of an ethylenically unsaturated water-insoluble monomer.
Claim 6
Dependent Claim
67 words
A substantially oil-free hydraulic fluid or metalworking composition of claim 2 comprising about 80 to about 99 weight percent aqueous liquid and about 1 to about 20 weight percent of a water-soluble synthetic addition copolymer consisting of (1) about 5 to about 40 weight percent of an ethylenically unsaturated polyalkyleneoxy containing monomer and (2) about 60 to about 95 weight percent of an ethylenically unsaturated water-soluble monomer.
Claim 7
Dependent Claim
19 words
A hydraulic fluid or metalworking composition of claim 3 comprising about 90 to about 99 weight percent aqueous liquid.
Claim 8
Dependent Claim
19 words
A hydraulic fluid or metalworking composition of claim 4 comprising about 90 to about 99 weight percent aqueous liquid.
Claim 9
Dependent Claim
55 words
A hydraulic fluid or metalworking composition of claim 3 comprising a water-soluble synthetic addition copolymer consisting essentially of (1) about 10 to about 20 weight percent ethylenically unsaturated, polyalkyleneoxy containing (2) about 35 to about 60 weight percent water-soluble ethylenically unsaturated monomer and (3) about 20 to about 55 weight percent ethylenically unsaturated water-insoluble monomer.
Claim 10
Dependent Claim
44 words
A hydraulic fluid or metalworking composition of claim 4 comprising a water-soluble addition copolymer consisting essentially of (1) about 10 to about 20 weight percent ethylenically unsaturated, polyalkyleneoxy containing surfactant monomer and (2) about 80 to about 90 weight percent water-soluble ethylenically unsaturated monomer.
Claim 11
Dependent Claim
16 words
A hydraulic fluid or metalworking composition of claim 1 having a pH of at least 7.
Claim 12
Dependent Claim
44 words
A hydraulic fluid or metalworking composition of claim 1 wherein said ethylenically unsaturated polyalkyleneoxy containing monomer is selected from a member of the group consisting of an alkylphenoxypoly(ethyleneoxy)methacrylate, an alkoxypoly(ethyleneoxy)methacrylate, a poly(ethyleneoxy)alkylmethacrylate, an alkoxy poly(ethyleneoxy) vinyl benzyl ether and an alkylphenoxypoly(ethyleneoxy) vinyl benzyl ether.
Claim 13
Dependent Claim
44 words
A hydraulic fluid or metalworking composition of claim 2 wherein said ethylenically unsaturated polyalkyleneoxy containing monomer is selected from a member of the group consisting of an alkylphenoxypoly(ethyleneoxy)methacrylate, an alkoxypoly(ethyleneoxy)methacrylate, a poly(ethyleneoxy)alkylmethacrylate, an alkoxy poly(ethyleneoxy) vinyl benzyl ether and an alkylphenoxypoly(ethyleneoxy) vinyl benzyl ether.
Claim 14
Dependent Claim
35 words
A hydraulic fluid or metalworking composition of claim 1 wherein said water-soluble monomer is selected from a member of the group consisting of acrylic acid, methacrylic acid, acrylamide, maleic anhydride, methacrylamide and dimethyl aminoethyl methacrylate.
Claim 15
Dependent Claim
35 words
A hydraulic fluid or metalworking composition of claim 2 wherein said water-soluble monomer is selected from a member of the group consisting of acrylic acid, methacrylic acid, acrylamide, maleic anhydride, methacrylamide and dimethyl aminoethyl methacrylate.
Claim 16
Dependent Claim
37 words
A hydraulic fluid or metalworking composition of claim 1 wherein said water-insoluble ethylenically unsaturated monomer is selected from the group consisting of styrene, α-methyl styrene, methylacrylate, butylacrylate, ethylacrylate, methylmethacrylate, ethylmethacrylate, acrylonitrile, methacrylonitrile, vinyl chloride and vinylidene chloride.
Claim 17
Dependent Claim
36 words
A hydraulic fluid or metalworking composition of claim 1 wherein said copolymer comprises (1) about 15 weight percent nonyloxypoly(ethyleneoxy) 39 ethyl methacrylate, (2) about 44.5 weight percent ethylacrylate and (3) about 40.5 weight percent methacrylic acid.
Claim 18
Dependent Claim
36 words
A hydraulic fluid or metalworking composition of claim 1 wherein said copolymer comprises (1) about 15 weight percent nonyloxypoly(ethyleneoxy) 9 ethyl methacrylate, (2) about 44.5 weight percent ethylacrylate and (3) about 40.5 weight percent methacrylic acid.
Claim 19
Dependent Claim
17 words
A hydraulic fluid or metalworking composition of claim 1 wherein said aqueous liquid contains an anti-foaming agent.
Claim 20
Dependent Claim
17 words
A hydraulic fluid or metalworking composition of claim 2 wherein said aqueous liquid contains an anti-foaming agent.
Claim 21
Dependent Claim
17 words
A hydraulic fluid or metalworking composition of claim 1 wherein said aqueous liquid contains a lubricity aid.
Claim 22
Dependent Claim
17 words
A hydraulic fluid or metalworking composition of claim 2 wherein said aqueous liquid contains a lubricity acid.
Claim 23
Dependent Claim
17 words
A hydraulic fluid or metalworking composition of claim 1 wherein said aqueous liquid contains a corrosion inhibitor.
Claim 24
Dependent Claim
17 words
A hydraulic fluid or metalworking composition of claim 2 wherein said aqeous liquid contains a corrosion inhibitor.
Claim 25
Dependent Claim
44 words
A composition of claim 1 wherein said polyalkyleneoxy containing monomer is represented by the formulae: ##STR11## wherein R 1 is hydrogen or methyl, n is from 0 to 100, and R 4 is hydrogen or alkyl containing from 1 to about 9 carbon atoms.
Claim 26
Dependent Claim
15 words
A composition of claim 23 comprising about 90 to about 99 weight percent aqueous liquid.
Claim 27
Dependent Claim
44 words
A composition of claim 2 wherein said polyalkyleneoxy containing monomer is represented by the formulae: ##STR12## wherein R 1 is hydrogen or methyl, n is from 0 to 100, and R 4 is hydrogen or alkyl containing from 1 to about 9 carbon atoms.
Claim 28
Dependent Claim
15 words
A composition of claim 25 comprising about 90 to about 99 weight percent aqueous liquid.
Claim 29
Dependent Claim
44 words
A composition of claim 3 wherein said polyalkyleneoxy containing monomer is represented by the formulae: ##STR13## wherein R 1 is hydrogen or methyl, n is from 0 to 100, and R 4 is hydrogen or alkyl containing from 1 to about 9 carbon atoms.
Claim 30
Dependent Claim
44 words
A composition of claim 4 wherein said polyalkyleneoxy containing monomer is represented by the formulae: ##STR14## wherein R 1 is hydrogen or methyl, n is from 0 to 100, and R 4 is hydrogen or alkyl containing from 1 to about 9 carbon atoms.
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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) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |