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US3558882A
Expired / Lapsed
US
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Water miscible penetrant remover
Assignee: Magnaflux Corp
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Filing: 1968-12-31
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Granted: 1971-01-26
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Expires: 1988-12-31
Abstract
Abstract A liquid composition for the removal of residual films of an oil-based colored penetrant, especially a fluorescent penetrant, from the surface of a workpiece undergoing tests for surface discontinuities. The composition is effective in a 75 to 100 percent concentrated form when used in a dip, or dip and drain, or a static form of application to the residual penetrant film by dissolving or emulsifying the penetrant so that it can be flushed off with water alone. When the concentrate is diluted with water to a range of between 15 and 75 percent vigorous agitation is required, while spray applications are recommended for concentrations as low as 0.2 percent, or preferably from 0.5 to 15 percent. Spraying causes the removal of the residual penetrant as a result of impingement, turbulence and displacement. Warm or hot water is used in diluting the concentrate to bring the temperature of the diluted composition to between about 100* and 140* F., and preferably between 100* and 120* F., to facilitate the substantially complete removal of any residual film of a fluorescent penetrant, especially from rough surfaces. My composition, as a concentrate consists essentially of a liquid, water-soluble nonionic surfactant, or mixture of surfactants; a water-immiscible aromatic hydrocarbon solvent having a KB value of at least 70; and a normally liquid, water-miscible glycolether type of coupler. The resulting homogeneous clear liquid composition is preferably one that is infinitely miscible with water at between 40* and 140* F. without exhibiting a cloud effect within those temperature limits.
Inventors
- 👤 Adolf Mlot-Fijalkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:51
CPC Classifications
C; C23; C23G; C23G5/00; C23G5/06; C09; C09D; C09D9/00; C09D9/04; C11; C11D; C11D1/00; C11D1/66; C11D1/72; C11D1/825; C11D1/8255; C11D3/00; C11D3/43; Y; Y10; Y10S; Y10S252/00; Y10S252/96
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
120 words
A composition as defined by claim 1, wherein: said surfactant is selected from the group consisting of: alkylphenoxy polyethoxylated ethanols, polyethoxylated straight chain primary C12-C15 12-C 15 alcohols containing from 6.5 to 15.5 ethylene oxide groups per molecule, polyethoxylated lauroyl amides containing from 5 to 15 ethylene oxide groups per molecule, biodegradable alcohol-ethylene oxide adducts and mixtures thereof, and is present within the range of about 5 to 85 percent, said aromatic hydrocarbon solvent is present within the range of about 5 to 20 percent, and said glycol type of coupler is an alkylene glycol-ether and is present within the range of about 15 to 90 percent, all percentages being by weight of the total nonaqueous portion of the composition.
Claim 2
Dependent Claim
50 words
A composition as defined by claim 2, wherein there are two surfactants, one having about 9.5 ethylene oxide groups and the other having about 15 ethylene oxide groups per molecule of alkylphenoxy polyethoxylated ethanol and the total of said surfactants is within the range of about 20 to 50 percent.
Claim 3
Dependent Claim
71 words
A composition as defined by claim 2, wherein: the surfactant content is within the range of from 20 to 50 percent; the aromatic hydrocarbon solvent is present within the range of from 12 to 18; the glycol-ether is present within the range of from 30 to 50 percent; and said composition being a clear homogeneous liquid having infinite miscibility with water at temperatures between 100* and 140* F. without cloud formation.
Claim 4
Dependent Claim
142 words
A composition as defined by claim 2, wherein: said components are indicated and present in substantially the following percentages: 18 percent of an alkylphenoxy polyethoxylated ethanol having about 15 ethylene oxide groups per molecule; 25 percent of an alkylphenoxy polyethoxylated ethanol having about 9.5 ethylene oxide groups per molecule; 15 percent of an aromatic hydrocarbon solvent having a KB value of about 70; and 42 percent of an ethylene glycol monobutyl ether; said composition having good penetrant-removing capability when diluted with water to the concentrations indicated below and used in accordance with the indicated techniques: from 0.2 to 15 percent concentration when used as a vigorously turbulent spray against the workpiece; from 15 to 75 percent concentration when used as a dip with agitation relative to the workpiece; and from 75 to 100 percent concentration when used as a dip without agitation.
Claim 5
Dependent Claim
148 words
In the method of detecting surface discontinuities in a workpiece by the liquid penetrant technique in which an oily-type liquid penetrant is applied to the surface of the workpiece, the excess of penetrant is removed from said surface withouT substantial removal of the penetrant residue entrapped in any surface discontinuity and said surface is thereafter inspected under conditions suitable for revealing the presence of surface discontinuities, the improvement which comprises: removing said excess of penetrant by the application to said surface of a composition which, as a concentrate, consists essentially of: at least one liquid, water-miscible, nonionic surfactant; a water-immiscible aromatic hydrocarbon solvent having a KB value of at least about 70; and a normally liquid, water-miscible glycol-type coupler; and establishing substantially static contact between said concentrate and said excess of penetrant to effect a sufficient emulsification of said penetrant to facilitate removal of said excess of penetrant.
Claim 6
Dependent Claim
150 words
In a method of detecting surface discontinuities in a workpiece by the liquid penetrant technique in which an oily-type liquid penetrant is applied to the surface of the workpiece, the excess of penetrant is removed from said surface without substantial removal of the penetrant residue entrapped in any surface discontinuity and said surface is thereafter inspected under conditions suitable for revealing the presence of surface discontinuities, the improvement which comprises: removing said excess of penetrant by the application to said surface of a water solution of from 0.2 percent to 15 percent by weight of a concentrate; said concentrate consisting essentially of: at least one liquid, water-miscible nonionic surfactant; a water-miscible aromatic hydrocarbon solvent having a KB value of at least 70; and a normally liquid, water-miscible glycol-type coupler; and said water solution being applied kinetically to said excess penetrant to effect the removal thereof by impingement, turbulence and displacement.
Claim 7
Dependent Claim
119 words
A method as defined by claim 6, in which said nonionic surfactant is selected from the group consisting of alkylphenoxy polyethoxylated ethanols, polyethoxylated straight chain primary C12-C15 alcohols containing from 6.5 to 15.5 ethylene oxide groups per molecule, polyethoxylated lauroyl amides containing from 5 to 15 ethylene oxide groups per molecule, biodegradable alcohol-ethylene oxide adducts and mixtures thereof, and is present within the range of about 5 to 85 percent said aromatic hydrocarbon solvent is present within the range of about 5 to 20 percent and said glycol-type of coupler is an alkylene glycol-ether and is present within the range of about 15 to 90 percent all percentages being by weight of the total nonaqueous portion of the composition.
Claim 8
Dependent Claim
155 words
In a method of detecting surface discontinuities in a workpiece by the liquid penetrant technique in which an oily-type liquid penetrant is applied to the surface of the workpiece, the excess of penetrant is removed from said surface without substantial removal of the penetrant residue entrapped in any surface discontinuity and said surface is thereafter inspected under conditions suitable for revealing the presence of surface discontinuities, the improvement which comprises: removing said excess of penetrant by the application to said surface of a composition, which consists essentially of: at least two liquid, water-miscible m nonionic surfactants, one having about 9.5 ethylene oxide groups and the other having about 15 ethylene oxide groups per molecule of alkylphenoxy polyethoxylated ethanol and the total of said surfactants is within the range of about 20 to 50 percent; a water-immiscible aromatic hydrocarbon solvent having a KB value of at least about 70; and a normally liquid, water-miscible glycol-type coupler.
Claim 9
Dependent Claim
232 words
In a method of detecting surface discontinuities in a workpiece by the liquid penetrant technique in which an oily-type liquid penetrant is applied to the surface of the workpiece, the excess of pEnetrant is removed from said surface without substantial removal of the penetrant residue entrapped in any surface discontinuity and said surface is thereafter inspected under conditions suitable for revealing the presence of surface discontinuities, the improvement which comprises: removing said excess of penetrant by the application to said surface of a composition consisting essentially of: at least one liquid, water-miscible nonionic surfactant selected from the group consisting of alkylphenoxy polyethoxylated ethanols, polyethoxylated straight chain primary C12-C15 alcohols containing from 6.5 to 15.5 ethylene oxide groups per molecule, polyethoxylated lauroyl amides containing from 5 to 15 ethylene oxide groups per molecule, biodegradable alcohol-ethylene oxide adducts and mixtures thereof, the selected surfactant being within the range of from 20 to 50 percent by weight of said composition; a water-immiscible aromatic hydrocarbon solvent having a KB value of at least about 70 present within the range of from 12 to 18 percent by weight of said composition; and a normally liquid, water-miscible glycol-ether as the coupler, present within the range of from 30 to 50 percent by weight of said composition, said composition being a clear homogeneous liquid having infinite miscibility with water at temperatures between 100* and 140* F. without cloud formation.
Claim 10
Dependent Claim
227 words
In the method of detecting surface discontinuities in a workpiece by the liquid penetrant technique in which an oily-type liquid penetrant is applied to the surface of the workpiece, the excess of penetrant is removed from said surface without substantial removal of the penetrant residue entrapped in any surface discontinuity and said surface is thereafter inspected under conditions suitable for revealing the presence of surface discontinuities, the improvement which comprises: spraying against said surface an aqueous solution containing from 0.2 to 15 percent of a concentrate consisting essentially of: a surfactant selected from the group consisting of: alkylphenoxy polyethoxylated ethanols, polyethoxylated straight chain primary C12-C15 alcohols containing from 6.5 to 15.5 ethylene oxide groups per molecule, polyethoxylated lauroyl amides containing from 5 to 15 ethylene oxide groups per molecule, biodegradable alcohol-ethylene oxide adducts and mixtures thereof, the selected surfactant being present within the range of about 5 to 85 percent by weight of said concentrate; a water-immiscible aromatic hydrocarbon solvent having a KB value of at least 70 present within the range of about 5 to 20 percent by weight of said concentrate; an alkylene glycol-ether type coupler present within the range of about 15 to 90 percent by weight of said concentrate; the balance of said composition being substantially water; and said aqueous solution being sprayed at a temperature between about 100* F. and 140* F.
References Cited (Backward Citations)
US3418078A
Cited
US3422670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |