US4447349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suds suppressing granules for use in detergent compositions
Assignee: Lever Brothers Co
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Filing: 1982-09-13
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Granted: 1984-05-08
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Expires: 2002-09-13
Abstract
Abstract Silicone-containing microgranules are formed by a coating process using a substantially spherical or cylindrical core material such as a sucrose bead, or an enzyme-containing prill or marume. In a preferred process the core is impregnated with an absorbent such as titanium dioxide, the absorbent is impregnated with a mixture of silicone oil and hydrophobic silica and the coated granule is then coated with wax. The granules are used in detergent compositions.
Inventors
- 👤 Louis H. T. Tai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:34
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3703; C11D3/373; C11D17/00; C11D17/0039; C11D3/0005; C11D3/0026; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
53 words
Suds-suppressing granules suitable for use in detergent compositions comprising from about 25% to 80% by weight of a substantially spherical or cylindrical core material of sucrose and one or more coatings, at least one coating comprising from about 5% to 30% based on the weight of the granules of a silicone oil mixture.
Claim 2
Dependent Claim
53 words
Suds-suppressing granules suitable for use in detergent compositions comprising from about 25% to 80% by weight of a substantially spherical or cylindrical core material of sucrose and one or more coatings, at least one coating comprising from about 5% to 30% based on the weight of the granules of a silicone oil mixture.
Claim 3
Dependent Claim
30 words
Granules according to claim 1, wherein one of the coatings comprises from about 15% to 40% by weight of the granules of an absorbent impregnated with the silicone oil mixture.
Claim 4
Dependent Claim
11 words
Granules according to claim 2, wherein the absorbent comprises titanium dioxide.
Claim 5
Dependent Claim
11 words
Granules according to claim 1 comprising an outer coating of wax.
Claim 6
Dependent Claim
22 words
Granules according to claim 3, wherein the wax is a paraffin wax having a melting point of from 35° to 65° C.
Claim 7
Dependent Claim
23 words
Granules according to claim 1, wherein the core material is substantially spherical and has an average diameter of from 0.1 to 3 millimeters.
Claim 8
Dependent Claim
23 words
Granules according to claim 1, 2, 3, 4, or 5, wherein the core material is formed from molten sucrose by a spray-cooling process.
Claim 9
Dependent Claim
14 words
A detergent composition comprising a detergent active compound and granules according to claim 1.
Claim 10
Dependent Claim
20 words
A detergent composition according to claim 8, comprising the granules in an amount of from 0.3 to 5% by weight.
Claim 11
Dependent Claim
54 words
A process for the manufacture of granules in accordance with any one of claims 1 to 6 which comprises the steps of (i) granulating substantially spherical core material with a particulate absorbent to form a coating of the absorbent on the surface of the cores; and (ii) impregnating the absorbent with a silicone oil.
Claim 12
Dependent Claim
19 words
A process in accordance with claim 10, wherein the granulation step is carried out in an inclined pan granulator.
Claim 13
Dependent Claim
26 words
A process in accordance with claim 10, wherein the silicone oil is dissolved in an organic solvent and the resulting solution is sprayed onto the absorbent.
Claim 14
Dependent Claim
39 words
A process according to claim 10 for the manufacture of granules in accordance with claim 4, wherein as a final step a solution of wax in an organic solvent is sprayed onto silicone-impregnated cores, and the solvent is evaporated.
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) | 1987-05-08 | 1987-11-07 | 1988-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-08 | 1991-11-07 | 1992-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-08 | 1995-11-07 | 1996-05-08 | $7700.00 | Window Closed / Lapsed |