Patent US4451387A successfully refreshed from Google Patents.
US4451387A
Expired / Lapsed
US
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Suds control agents and detergent compositions containing them
Assignee: Lever Brothers Co
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Filing: 1982-08-19
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Granted: 1984-05-29
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Expires: 2002-08-19
Abstract
Abstract Suds control agents for addition to detergent compositions are prepared by a granulation process. In the process core particles of gelatinised starch are granulated with a silicone oil admixed with hydrophobic silica. The granules are then coated with wax by spraying from a solution in an organic solvent. Typically the granules produced contain 45-55%, silicone oil compound 35-50% and wax 7-15% gelatinized starch.
Inventors
- 👤 Loui H. T. Tai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:18
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/0005; C11D3/0026; C11D17/00; C11D17/0039; C11D3/16; C11D3/18; C11D3/20; C11D3/22; C11D3/222; C11D3/37; C11D3/3703; C11D3/373
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
96 words
A detergent composition comprising an anionic surfactant and an effective amount of a suds control agent, characterized in that the sud control agent comprises: (i) a core of gelatinized starch, in an amount from about 45 to 55%; (ii) a silicon oil composition, in an amount from about 35 to 50%, sorbed thereon, the silicone oil composition being a mixture of silicone oil and hydrophobic silica; and (iii) the silicone sorbed core coated with a wax in an amount of from about 7 to 15%; the percentage being based on the total weight of the agent.
Claim 2
Dependent Claim
96 words
A detergent composition comprising an anionic surfactant and an effective amount of a suds control agent, characterized in that the sud control agent comprises: (i) a core of gelatinized starch, in an amount from about 45 to 55%; (ii) a silicon oil composition, in an amount from about 35 to 50%, sorbed thereon, the silicone oil composition being a mixture of silicone oil and hydrophobic silica; and (iii) the silicone sorbed core coated with a wax in an amount of from about 7 to 15%; the percentage being based on the total weight of the agent.
Claim 3
Dependent Claim
26 words
A detergent composition according to claim 1, further characterised in that the particle size of the core of gelatinised starch is from 50 to 500 microns.
Claim 4
Dependent Claim
30 words
A detergent composition according to claim 1, further characterized in that the suds control agent is present in an amount of from 0.1 to 1% by weight of the composition.
Claim 5
Dependent Claim
19 words
A detergent composition according to claim 1, further characterized in that the gelatinised starch is a nonionic gelatinised starch.
Claim 6
Dependent Claim
22 words
A detergent composition according to claim 1, further characterized in that the pH of the gelatinised starch is from 5.5 to 9.
Claim 7
Dependent Claim
86 words
A process for making a detergent composition according to claim 1, 2, 3, 4 or 5, characterised by the steps (a) granulating a gelatinised starch with a silicone oil compound to form granules having an average particle size of from 200 to 1000 microns and having the silicone oil compound adsorbed thereon; (b) spraying the resultant granules with a solution of a wax in an organic solvent; (c) subsequently evaporating the organic solvent; and (d) admixing the resultant suds-control agent with the remainder of the composition.
References Cited (Backward Citations)
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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) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |