US4663070A
Expired / Lapsed
US
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Process for preparing soap-acyl isethionate toilet bars
Assignee: Lever Brothers Co
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Filing: 1985-01-25
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Granted: 1987-05-05
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Expires: 2005-01-25
Abstract
Abstract A process is disclosed for preparing a toilet bar composition whose components comprise a fatty acid soap and a C 10 -C 16 acyl isethionate salt in the ratio of about 20:1 to 1:0.98, respectively. The blend is charged with an initial amount of water from 12 to 30% by weight of the composition. Heating and mixing are terminated after the blend has passed a second peak in viscosity, termination occurring between about 500 and 6,000 centipoise at 35 sec -1 shear rate at 210°-218° F. The final moisture content of the blend must be between 8.5 to 20% water.
Inventors
- 👤 Mark S. Dobrovolny
- 👤 James J. Corr
- 👤 William R. Narath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:34
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/0047; C11D17/006; C11D10/00; C11D10/04; C11D10/042; C11D1/00; C11D1/02; C11D1/12; C11D1/126
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
146 words
A process for preparing a toilet bar composition comprising: (i) blending components comprising: (a) an alkali metal, ammonium or C 1 -C 4 alkyl or hydroxyalkyl substituted ammonium fatty acid soap in an amount greater than 25%; (b) a C 10 -C 16 acyl isethionate salt the ratio of soap to acyl isethionate salt ranging from about 20:1 to 1:0.98; and (c) from 12 to 30% initial water based on the weight of the total charge; (ii) heating and mixing the component blend; and (iii) terminating mixing after the blend passes a second peak in viscosity, any peaks due solely to introduction of reactants not being counted as a peak in viscosity, termination occurring at a blend viscosity between about 500 and 6,000 centipoise at 35 sec -1 shear rate at 210°-218° F., the final moisture content of the blend being between 8.5 to 20% water.
Claim 2
Dependent Claim
146 words
A process for preparing a toilet bar composition comprising: (i) blending components comprising: (a) an alkali metal, ammonium or C 1 -C 4 alkyl or hydroxyalkyl substituted ammonium fatty acid soap in an amount greater than 25%; (b) a C 10 -C 16 acyl isethionate salt the ratio of soap to acyl isethionate salt ranging from about 20:1 to 1:0.98; and (c) from 12 to 30% initial water based on the weight of the total charge; (ii) heating and mixing the component blend; and (iii) terminating mixing after the blend passes a second peak in viscosity, any peaks due solely to introduction of reactants not being counted as a peak in viscosity, termination occurring at a blend viscosity between about 500 and 6,000 centipoise at 35 sec -1 shear rate at 210°-218° F., the final moisture content of the blend being between 8.5 to 20% water.
Claim 3
Dependent Claim
20 words
A process according to claim 1 wherein the ratio of soap to acyl isethionate ranges from about 10:1 to 1:0.98.
Claim 4
Dependent Claim
20 words
A process according to claim 1 wherein the ratio of soap to acyl isethionate ranges from about 4:1 to 1.5:1.
Claim 5
Dependent Claim
34 words
A process according to claim 1 wherein the mixing temperature ranges from above about 200° to 250° F. at atmospheric pressure or from 80° to 200° F. below atmospheric to about 10 mm pressure.
Claim 6
Dependent Claim
18 words
A process according to claim 4 wherein the temperature ranges from 200° to 230° F. at atmospheric pressure.
Claim 7
Dependent Claim
17 words
A process according to claim 1 wherein the reaction time ranges from about 60 to 100 minutes.
Claim 8
Dependent Claim
17 words
A process according to claim 1 wherein the initial water content ranges from about 20 to 22%.
Claim 9
Dependent Claim
17 words
A process according to claim 1 wherein the final moisture content ranges from about 9.5 to 14%.
Claim 10
Dependent Claim
19 words
A process according to claim 1 wherein the soap is present in an amount from about 30% to 95.2%.
Claim 11
Dependent Claim
16 words
A process according to claim 1 wherein the soap is present from about 50 to 70%.
Claim 12
Dependent Claim
19 words
A process according to claim 1 wherein the alkali metal of the fatty acid soap is sodium or potassium.
Claim 13
Dependent Claim
24 words
A process according to claim 1 wherein the acyl isethionate salt is present from about 5 to 45% by weight of the total composition.
Claim 14
Dependent Claim
24 words
A process according to claim 1 wherein the acyl isethionate salt is present from about 10 to 30% by weight of the total composition.
Claim 15
Dependent Claim
17 words
A process according to claim 1 wherein the acyl isethionate salt is a sodium or potassium salt.
Claim 16
Dependent Claim
21 words
A process according to claim 1 further comprising from about 0.5 to 30% sodium isethionate by weight of the total composition.
Claim 17
Dependent Claim
21 words
A process according to claim 1 further comprising from about 2.5 to 15% sodium isethionate by weight of the total composition.
Claim 18
Dependent Claim
21 words
A process according to claim 1 further comprising from about 1% to about 30% C 10 -C 18 free fatty acid.
Claim 19
Dependent Claim
16 words
A process according to claim 17 wherein the fatty acid is stearic or coconut fatty acid.
Claim 20
Dependent Claim
31 words
A process according to claim 1 wherein mixing is terminated after the blend reaches a viscosity between about 2,000 and 4,000 centipoise at 35 sec -1 shear rate at 210°-218° F.
Claim 21
Independent Claim
176 words
A method for identifying the end-point of a toilet bar composition reaction process wherein the end-point is identified by the attainment of a second peak in viscosity, any peaks due solely to introduction of reactants not being counted as a peak in viscosity, of a formulation comprising: (i) blending components comprising: (a) an alkali metal, ammonium or C 1 -C 4 alkyl or hydroxyalkyl substituted ammonium fatty acid soap in an amount greater than 25%; (b) a C 10 -C 16 acyl isethionate salt, the ratio of soap to acyl isethionate salt ranging from about 20:1 to 1:0.98; and (c) from 12 to 30% initial water; (ii) heating and mixing the component blend; and (iii) terminating mixing after the blend passes a second peak in viscosity, any peaks due solely to introduction of reactants not being counted as a peak in viscosity, termination occurring at a blend viscosity between about 500 and 6,000 centipoise at 35 sec -1 shear rate at 210°-218° F., the final moisture content of the blend being between 8.5 to 20% water.
Claim 22
Independent Claim
176 words
A method for identifying the end-point of a toilet bar composition reaction process wherein the end-point is identified by the attainment of a second peak in viscosity, any peaks due solely to introduction of reactants not being counted as a peak in viscosity, of a formulation comprising: (i) blending components comprising: (a) an alkali metal, ammonium or C 1 -C 4 alkyl or hydroxyalkyl substituted ammonium fatty acid soap in an amount greater than 25%; (b) a C 10 -C 16 acyl isethionate salt, the ratio of soap to acyl isethionate salt ranging from about 20:1 to 1:0.98; and (c) from 12 to 30% initial water; (ii) heating and mixing the component blend; and (iii) terminating mixing after the blend passes a second peak in viscosity, any peaks due solely to introduction of reactants not being counted as a peak in viscosity, termination occurring at a blend viscosity between about 500 and 6,000 centipoise at 35 sec -1 shear rate at 210°-218° F., the final moisture content of the blend being between 8.5 to 20% water.
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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) | 1990-05-04 | 1990-11-03 | 1991-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-04 | 1994-11-03 | 1995-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-04 | 1998-11-03 | 1999-05-05 | $7700.00 | Window Closed / Lapsed |