Patent US4657693A successfully refreshed from Google Patents.
US4657693A
Expired / Lapsed
US
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Spray-dried granular detergent compositions containing tripolyphosphate detergent builder, polyethylene glycol and polyacrylate
Assignee: Procter and Gamble Co
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Filing: 1985-12-23
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Granted: 1987-04-14
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Expires: 2005-12-23
Abstract
Abstract Detergent compositions comprising a mixture of polyethylene glycol and polyacrylate of specified molecular weight for improved physical properties and cold water dispersion are disclosed.
Inventors
- 👤 Rodney M. Wise
- 👤 Robert R. Ziek, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:28
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3757; C11D3/3761; C11D11/00; C11D11/02; C11D3/3703; C11D3/3707
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
102 words
A spray-dried granular detergent composition comprising: (a) from about 5% to about 50% of a nonsoap anionic surfactant or mixtures thereof; (b) from about 20% to about 60% of an alkali metal tripolyphosphate builder or mixtures thereof; (c) from about 1% to about 10% of a mixture of polyethylene glycol and a polyacrylate, said mixture having a polyethylene glycol to polyacrylate weight ratio of from about 1:3 to about 3:1, said polyethylene glycol having a weight average molecular weight of from about 1,000 to about 50,000, and said polyacrylate having a weight average molecular weight of from about 1,000 to about 20,000.
Claim 2
Dependent Claim
102 words
A spray-dried granular detergent composition comprising: (a) from about 5% to about 50% of a nonsoap anionic surfactant or mixtures thereof; (b) from about 20% to about 60% of an alkali metal tripolyphosphate builder or mixtures thereof; (c) from about 1% to about 10% of a mixture of polyethylene glycol and a polyacrylate, said mixture having a polyethylene glycol to polyacrylate weight ratio of from about 1:3 to about 3:1, said polyethylene glycol having a weight average molecular weight of from about 1,000 to about 50,000, and said polyacrylate having a weight average molecular weight of from about 1,000 to about 20,000.
Claim 3
Dependent Claim
23 words
The composition of claim 1 wherein the mixture of polyethylene glycol and polyacrylate comprises from about 1% to about 3% of the composition.
Claim 4
Dependent Claim
21 words
The composition of claim 2 wherein the polyacrylate has a weight average molecular weight of from about 2,000 to about 10,000.
Claim 5
Dependent Claim
36 words
The composition of claim 3 wherein the polyethylene glycol has a weight average of from about 4,000 to about 20,000, and the polyacrylate has a weight average molecular weight of from about 3,000 to about 8,000.
Claim 6
Dependent Claim
11 words
The composition of claim 4 wherein the polyacrylate is sodium polyacrylate.
Claim 7
Dependent Claim
26 words
The composition of claim 1 wherein the mixture of polyethylene glycol and polyacrylate are present in a weight ratio of from about 1:3 to about 3:1.
Claim 8
Dependent Claim
38 words
The composition of claim 1 wherein the polyacrylate has a weight average molecular weight of from about 3,000 to about 8,000, and the polyethylene glycol has a weight average molecular weight of from about 4,000 to about 20,000.
Claim 9
Dependent Claim
11 words
The composition of claim 1 wherein the polyacrylate is sodium polyacrylate.
Claim 10
Dependent Claim
14 words
The composition of claim 1 wherein the alkali metal tripolyphosphate builder is sodium tripolyphosphate.
Claim 11
Dependent Claim
50 words
The composition of claim 9 wherein the nonsoap anionic surfactant comprises a surfactant selected from the group consisting of alkali metal salts of C 11-13 alkylbenzene sulfonates, C 14-18 alkyl sulfates, C 14-18 alkyl polyethoxy sulfates containing from about 1 to about 4 moles of ethylene oxide and mixtures thereof.
Claim 12
Dependent Claim
17 words
The composition of claim 10 comprising from about 10% to about 30% of the nonsoap anionic surfactant.
Claim 13
Dependent Claim
31 words
The composition of claim 9 additionally comprising from about 1% to about 8% by weight of an alkali metal silicate having a molar ratio of from about 1.6 to about 2.4.
Claim 14
Dependent Claim
73 words
The composition of claim 12 comprising from about 1% to about 3% of a mixture of a polyethylene glycol and sodium polyacrylate, said mixture having a polyethylene glycol to sodium polyacrylate weight ratio of from about 1:3 to about 3:1, said polyethylene glycol having a weight average molecular weight of from about 4,000 to about 20,000 and said sodium polyacrylate having a weight average molecular weight of from about 3,000 to about 8,000.
Claim 15
Dependent Claim
128 words
A process for spray drying a granular detergent composition comprising: (a) from about 5% to about 50% of a nonsoap anionic surfactant or mixtures thereof; (b) from about 20% to about 60% of an alkali metal tripolyphosphate builder or mixtures thereof; (c) from about 1% to about 10% of a mixture of polyethylene glycol and a polyacrylate wherein the polyethylene glycol and polyacrylate are present in a weight ratio of from about 1:3 to about 3:1 and, wherein the components are mixed in the crutcher along with enough additional water so that the water content of the crutcher paste is from about 25% to about 50% and then spray dried with an inlet air temperature of from about 400° F. (204° C.) to about 800° F. (427° C.).
Claim 16
Dependent Claim
128 words
A process for spray drying a granular detergent composition comprising: (a) from about 5% to about 50% of a nonsoap anionic surfactant or mixtures thereof; (b) from about 20% to about 60% of an alkali metal tripolyphosphate builder or mixtures thereof; (c) from about 1% to about 10% of a mixture of polyethylene glycol and a polyacrylate wherein the polyethylene glycol and polyacrylate are present in a weight ratio of from about 1:3 to about 3:1 and, wherein the components are mixed in the crutcher along with enough additional water so that the water content of the crutcher paste is from about 25% to about 50% and then spray dried with an inlet air temperature of from about 400° F. (204° C.) to about 800° F. (427° C.).
Claim 17
Dependent Claim
42 words
The process of claim 14 wherein the water content of the crutcher paste is from about 28% to about 40% and the inlet air temperature in the spray tower is from about 500° F. (260° C.) to about 700° F. (371° C.).
Claim 18
Dependent Claim
10 words
A granular composition prepared by the process of claim 14.
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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) | 1990-04-13 | 1990-10-13 | 1991-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-13 | 1994-10-13 | 1995-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-13 | 1998-10-13 | 1999-04-14 | $7700.00 | Window Closed / Lapsed |