US4623476A
Expired / Lapsed
US
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Stable suspension of pigments in aqueous hypochlorite bleach compositions
Assignee: Procter and Gamble Co
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Filing: 1985-07-02
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Granted: 1986-11-18
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Expires: 2005-07-02
Abstract
Abstract Aqueous hypochlorite laundry bleach compositions containing a suspension of a bleach stable (e.g., Ultramarine Blue) pigment, optical brightener 4,4'-bis(4-phenyl-2H-1,2,3-triazol-2-yl)-2,2'-stilbenedisulfonate, and a certain alkylaryl sulfonate surfactant. Preferred compositions contain a bleach stable organic material having a density of from 0.8 to 1.05 g/cc, which organic material is preferably a perfume, and a bleach stable buffering agent to maintain pH and physical stability.
Inventors
- 👤 Bala C. Nayar
- 👤 Kathleen G. Baier
- 👤 David A. O'Brien
- 👤 Edward M. Sawicki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:54
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/395; C11D3/3956; C11D3/40; C11D3/42
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
196 words
An aqueous laundry composition comprising: (a) from about 3% to about 10% sodium hypochlorite; (b) from about 0.01% to about 0.3% of a bleach stable pigment selected from the group consisting of Ultramarine Blue, chlorinated indanthrone and their equivalents; (c) from about 0.025% to about 0.2% of an optical brightener having the formula: ##STR10## or the equivalent derivative salts thereof; (d) from about 0.05% to about 2% of a surfactant selected from the group consisting of alkylaryl sulfonates having the formulas: ##STR11## wherein R 1 is a C 8 -C 20 alkyl group, R 2 and R 3 are C 10 -C 16 alkyl groups, M is alkali metal and n is 0 or 1; (e) from 0% to about 0.5% of a relatively bleach stable organic oil having a density of 0.8 to about 1.05 g/cc; (f) from about 0% to about 10% of bleach stable buffering agent capable of maintaining the bleach pH between 10.5 and 13.5; and (g) at least about 80% water; wherein the pigment is uniformly dispersed in an aqueous system of said brightener and said surfactant; and wherein the said compositions is made by a process comprising the steps of:
Claim 2
Dependent Claim
196 words
An aqueous laundry composition comprising: (a) from about 3% to about 10% sodium hypochlorite; (b) from about 0.01% to about 0.3% of a bleach stable pigment selected from the group consisting of Ultramarine Blue, chlorinated indanthrone and their equivalents; (c) from about 0.025% to about 0.2% of an optical brightener having the formula: ##STR10## or the equivalent derivative salts thereof; (d) from about 0.05% to about 2% of a surfactant selected from the group consisting of alkylaryl sulfonates having the formulas: ##STR11## wherein R 1 is a C 8 -C 20 alkyl group, R 2 and R 3 are C 10 -C 16 alkyl groups, M is alkali metal and n is 0 or 1; (e) from 0% to about 0.5% of a relatively bleach stable organic oil having a density of 0.8 to about 1.05 g/cc; (f) from about 0% to about 10% of bleach stable buffering agent capable of maintaining the bleach pH between 10.5 and 13.5; and (g) at least about 80% water; wherein the pigment is uniformly dispersed in an aqueous system of said brightener and said surfactant; and wherein the said compositions is made by a process comprising the steps of:
Claim 3
Dependent Claim
102 words
preparing an aqueous system containing said pigment, said optical brightener, said surfactant, and said bleach stable organic oil; 2. adding slowly, and with low shear mixing, to the system of Step 1, a sufficient amount of aqueous sodium hypochlorite to produce a final composition comprising from about 3% to about 10% sodium hypochlorite, from about 0.01% to about 0.3% of pigment, from about 0.025% to about 0.2% optical brightener, from about 0.05% to about 2% surfactant, and from 0% to about 0.5% of said bleach stable organic oil; 3. Adding the buffering agent at the desired level to produce the final composition.
Claim 4
Dependent Claim
102 words
preparing an aqueous system containing said pigment, said optical brightener, said surfactant, and said bleach stable organic oil; 2. adding slowly, and with low shear mixing, to the system of Step 1, a sufficient amount of aqueous sodium hypochlorite to produce a final composition comprising from about 3% to about 10% sodium hypochlorite, from about 0.01% to about 0.3% of pigment, from about 0.025% to about 0.2% optical brightener, from about 0.05% to about 2% surfactant, and from 0% to about 0.5% of said bleach stable organic oil; 3. Adding the buffering agent at the desired level to produce the final composition.
Claim 5
Dependent Claim
26 words
The composition of claim 1 wherein said organic oil is added to the aqueous system of Step 1 after the surfactant and brightener have been mixed.
Claim 6
Dependent Claim
20 words
The composition of claim 1 wherein the amount of pigment in the finished composition is from 0.01% to about 0.1%.
Claim 7
Dependent Claim
22 words
The composition of claim 1 wherein the amount of sodium hypochlorite in the finished composition is from about 4% to about 6%.
Claim 8
Dependent Claim
22 words
The composition of claim 1 wherein the amount of optical brightener in the finished composition is from about 0.05% to about 0.075%.
Claim 9
Dependent Claim
21 words
The composition of claim 1 wherein the amount of surfactant in the finished composition is from about 0.2% to about 1%.
Claim 10
Dependent Claim
22 words
The composition of claim 1 wherein the amount of organic oil in the finished composition is from about 0.05% to about 0.3%.
Claim 11
Dependent Claim
29 words
The composition of claim 1 wherein the buffering agent is a salt of a carbonate, silicate, orthophosphate, or tetraborate, and is present at a level of 0.2% to 10%.
Claim 12
Dependent Claim
20 words
The composition of claim 1 or 8 wherein the amount of buffering agent is from about 1.5% to about 5%.
Claim 13
Dependent Claim
186 words
An aqueous laundry composition comprising: (a) from about 3% to about 10% sodium hypochlorite; (b) from about 0.1% to about 0.3% of a bleach stable pigment selected from the group consisting of Ultramarine Blue, chlorinated indanthrone and their equivalents; (c) from about 0.025% to about 0.2% of an optical brightener having the formula: ##STR12## or the equivalent derivative salts thereof; (d) from about 0.05% to about 2% of a surfactant selected from the group consisting of alkylaryl sulfonates having the formulas: ##STR13## wherein R 1 is a C 8 -C 20 alkyl group, R 2 and R 3 are C 10 -C 16 alkyl groups, M is alkali metal and n is 0 or 1; (e) from 0% to about 0.5% of a relatively bleach stable organic oil having a density of 0.8 to about 1.05; (f) from about 0% to about 10% of a bleach stable buffering agent; and (g) at least about 80% water; wherein the pigment is uniformly dispersed in an aqueous system of said brightener and said surfactant; and wherein the said compositions is made by a process comprising the steps of:
Claim 14
Dependent Claim
186 words
An aqueous laundry composition comprising: (a) from about 3% to about 10% sodium hypochlorite; (b) from about 0.1% to about 0.3% of a bleach stable pigment selected from the group consisting of Ultramarine Blue, chlorinated indanthrone and their equivalents; (c) from about 0.025% to about 0.2% of an optical brightener having the formula: ##STR12## or the equivalent derivative salts thereof; (d) from about 0.05% to about 2% of a surfactant selected from the group consisting of alkylaryl sulfonates having the formulas: ##STR13## wherein R 1 is a C 8 -C 20 alkyl group, R 2 and R 3 are C 10 -C 16 alkyl groups, M is alkali metal and n is 0 or 1; (e) from 0% to about 0.5% of a relatively bleach stable organic oil having a density of 0.8 to about 1.05; (f) from about 0% to about 10% of a bleach stable buffering agent; and (g) at least about 80% water; wherein the pigment is uniformly dispersed in an aqueous system of said brightener and said surfactant; and wherein the said compositions is made by a process comprising the steps of:
Claim 15
Dependent Claim
107 words
preparing an aqueous system containing said optical brightener, said surfactant, and said bleach stable organic oil; 2. adding slowly, and with low shear mixing, to the system of Step 1, a sufficient amount of aqueous sodium hypochlorite and a sufficient amount of said pigment to produce a final composition comprising from about 3% to about 10% sodium hypochlorite, from about 0.01% to about 0.3% of pigment, from about 0.025% to about 0.2% optical brightener, from about 0.05% to about 2% surfactant, and from 0% to about 0.5% of said bleach stable organic oil; 3. adding the buffering agent at the desired level to produce the final composition.
Claim 16
Dependent Claim
107 words
preparing an aqueous system containing said optical brightener, said surfactant, and said bleach stable organic oil; 2. adding slowly, and with low shear mixing, to the system of Step 1, a sufficient amount of aqueous sodium hypochlorite and a sufficient amount of said pigment to produce a final composition comprising from about 3% to about 10% sodium hypochlorite, from about 0.01% to about 0.3% of pigment, from about 0.025% to about 0.2% optical brightener, from about 0.05% to about 2% surfactant, and from 0% to about 0.5% of said bleach stable organic oil; 3. adding the buffering agent at the desired level to produce the final composition.
Claim 17
Dependent Claim
43 words
The composition of claim 10 wherein a sufficient amount of said organic oil is added to the aqueous system of Step 1 after the surfactant and brightener have been mixed to provide a final composition comprising at least about 0.01% said organic oil.
Claim 18
Dependent Claim
20 words
The composition of claim 1 wherein the amount of pigment in the finished composition is from 0.01% to about 0.1%.
Claim 19
Dependent Claim
22 words
The composition of claim 10 wherein the amount of sodium hypochlorite in the finished composition is from about 4% to about 6%.
Claim 20
Dependent Claim
22 words
The composition of claim 10 wherein the amount of optical brightener in the finished composition is from about 0.05% to about 0.075%.
Claim 21
Dependent Claim
21 words
The composition of claim 10 wherein the amount of surfactant in the finished composition is from about 0.2% to about 1%.
Claim 22
Dependent Claim
22 words
The composition of claim 10 wherein the amount of organic oil in the finished composition is from about 0.05% to about 0.3%.
Claim 23
Dependent Claim
29 words
The composition of claim 10 wherein the buffering agent is a salt of a carbonate, silicate, orthophosphate, or tetraborate, and is present at a level of 0.2% to 10%.
Claim 24
Dependent Claim
20 words
The composition of claim 10 or 17 wherein the amount of bleach stable buffering agent is between 1.5% and 5%.
Claim 25
Dependent Claim
15 words
The composition of claims 1, 10 and 16 wherein said organic oil includes a perfume.
Claim 26
Dependent Claim
26 words
The composition of claims 1, 10 and 16 wherein said organic oil includes a linear alkyl benzene with a preferred chain length of 10-14 carbon atoms.
Claim 27
Dependent Claim
20 words
The composition of claim 20 wherein said linear alkyl benzene has an average chain length of about 12 carbon atoms.
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) | 1989-11-17 | 1990-05-19 | 1990-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-17 | 1994-05-19 | 1994-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-17 | 1998-05-19 | 1998-11-18 | $7700.00 | Window Closed / Lapsed |