US3914185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing liquid detergent compositions
Assignee: Colgate Palmolive Co
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Filing: 1973-03-15
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Granted: 1975-10-21
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Expires: 1993-03-15
Abstract
Abstract Clear, liquid, heavy-duty detergents based on mixed surfactant systems with nitrilotriacetic acid salt builders can be prepared in the absence of heat without gel formation. The surfactant system is first dissolved in a suitable solvent. The optical brighteners are dissolved in an organic solvent and combined with the surfactant solution. This mixture is then added to a mixture of the remaining ingredients. The surfactants used can include nonionic surfactants, anionic surfactants, amine oxides, and mixtures thereof.
Inventors
- 👤 Jack Thomas Inamorato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:20
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/66; C11D1/72; C11D1/02; C11D1/12; C11D1/22; C11D1/29; C11D1/83; C11D11/00; C11D11/0094; C11D3/00; C11D3/16; C11D3/26; C11D3/33; C11D1/75; Y; Y10; Y10S; Y10S516/00; Y10S516/905; Y10S516/909; Y10S516/914; Y10S516/917; Y10S516/92
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
194 words
A METHOD OF PREPARING A CLEAR, HEAVY-DUTY LIQUID DETERGENT COMPOSITION FREE OF PHOSPHATES IN THE ABSENCE OF HEAT AND WITHOUT GEL FORMATION WHICH COMPRISES THE STEPS OF (A) MIXING A SYNTHETHIC ORGANIC DETERGENT SELECTED FROM THE GROUP CONSISTING OF ETHYLENE OXIDE CONDENSATE NONIONIC DETERGENTS, C10-C20 ALKYL POLYETHOXY SULFATES OF THE FORMULA RO(C2H4O)NSO3M WHEREIN N IS 2 TO 6 AND M IS SODIUM, POTASSIUM, AMMONIUM, LOWER AKYLAMINO OR LOWER ALKANOLAMINO, MIXTURES THEREOF, AND MIXTURES OF SAID NONIONIC DETERGENTS OR SAID ALKYL POLYETHOXY SULFATES WITH WATER-SOLUBLE C10-C16 ALKYL BENZENE SULFONATES OR AMINE OXIDES HAVING THE FORMULA R1R2R3N $ O WHEREIN R1 IS AN ALKYL OF 10 TO 16 CARBON ATOMS AND R2 AND R3 ARE EACH METHYL OR ETHYL, WITH AN ORGNIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF C2-C3 ALKANOLS AND ETHYLENE GLYCOL MONOETHYL ETHER TO FORM A FIRST SOLUTION, (B) FORMING A SOLUTION OF SODIUM OR POTASSIUM NITRILOTRIACETATE IN WATER, AND (C)ADMIXING THE FIRST SOLUTION WITH SAID NITRILOTRIACETATE SOLUTION TO FORM A CLEAR LIQUID DETERGENT CONSISTING ESSENTIALLY OF 5% TO 30% BY WEIGHT OF SAID DETERGENT, 2% TO 15% BY WEIGHT OF SAID SOLVENT, 5% BY WEIGHT OF SAID NITRILOTRIACETTE AND THE BALANCE WATER.
Claim 2
Independent Claim
194 words
A METHOD OF PREPARING A CLEAR, HEAVY-DUTY LIQUID DETERGENT COMPOSITION FREE OF PHOSPHATES IN THE ABSENCE OF HEAT AND WITHOUT GEL FORMATION WHICH COMPRISES THE STEPS OF (A) MIXING A SYNTHETHIC ORGANIC DETERGENT SELECTED FROM THE GROUP CONSISTING OF ETHYLENE OXIDE CONDENSATE NONIONIC DETERGENTS, C10-C20 ALKYL POLYETHOXY SULFATES OF THE FORMULA RO(C2H4O)NSO3M WHEREIN N IS 2 TO 6 AND M IS SODIUM, POTASSIUM, AMMONIUM, LOWER AKYLAMINO OR LOWER ALKANOLAMINO, MIXTURES THEREOF, AND MIXTURES OF SAID NONIONIC DETERGENTS OR SAID ALKYL POLYETHOXY SULFATES WITH WATER-SOLUBLE C10-C16 ALKYL BENZENE SULFONATES OR AMINE OXIDES HAVING THE FORMULA R1R2R3N $ O WHEREIN R1 IS AN ALKYL OF 10 TO 16 CARBON ATOMS AND R2 AND R3 ARE EACH METHYL OR ETHYL, WITH AN ORGNIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF C2-C3 ALKANOLS AND ETHYLENE GLYCOL MONOETHYL ETHER TO FORM A FIRST SOLUTION, (B) FORMING A SOLUTION OF SODIUM OR POTASSIUM NITRILOTRIACETATE IN WATER, AND (C)ADMIXING THE FIRST SOLUTION WITH SAID NITRILOTRIACETATE SOLUTION TO FORM A CLEAR LIQUID DETERGENT CONSISTING ESSENTIALLY OF 5% TO 30% BY WEIGHT OF SAID DETERGENT, 2% TO 15% BY WEIGHT OF SAID SOLVENT, 5% BY WEIGHT OF SAID NITRILOTRIACETTE AND THE BALANCE WATER.
Claim 3
Dependent Claim
37 words
A method according to claim 1 wherein optical brighteners soluble in said solvent are dissolved in said first solution, said brighteners being present in an amount of 0.2% to 2% by weight of said liquid detergent composition.
Claim 4
Dependent Claim
52 words
A method according to claim 2 wherein said optical brighteners are dissolved in an organic solvent selected from the group consisting of C2-C3alkanols and ethylene glycol monoethyl ether to form a second solution and said second solution is admixed with said first solution prior to being admixed with said aqueous nitrilotriacetate solution.
Claim 5
Dependent Claim
24 words
A method according to claim 1 wherein said detergent is a condensate of a C8-C22 alkanol with 6 to 30 moles of ethylene oxide.
Claim 6
Dependent Claim
55 words
A method according to claim 1 wherein said detergent is a mixture of a condensate of a C8-C22 alkanol with 6 to 30 moles of ethylene oxide and a second detergent selected from the group consisting of said alkyl polyethoxy sulfate, said alkyl benzene sulfonate and said amine oxide and said first solutions includes water.
Claim 7
Dependent Claim
29 words
A method according to claim 5 wherein said detergent is a mixture of said condensate and said polyethoxy sulfate, said detergents being present in approximately equal amounts by weight.
Claim 8
Dependent Claim
14 words
A method according to claim 1 wherein water is included in said first solution.
Claim 9
Dependent Claim
31 words
A method according to claim 7 wherein a water-soluble hydrotrope selected from the group consisting of C1-C3 alkyl substituted benzene sulfonates and C5-C6 alkyl sulfates is included in said first solution.
Claim 10
Dependent Claim
50 words
A method according to claim 3 wherein said solution of said nitrilotriacetate is prepared by adding nitrilotriacetic acid to an aqueous solution of water-soluble hydroxide to neutralize said acid and said first solution and said second solution is added to said nitriloacetate solution with agitation, thereby forming said liquid detergent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |