US4707160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particles containing active halogen bleach in a diluted core
Assignee: Lever Brothers Co
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Filing: 1985-12-31
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Granted: 1987-11-17
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Expires: 2005-12-31
Abstract
Abstract A bleach particle is provided whose core is an intimately dispersed agglomerated mixture of a halogen bleaching agent, an inorganic phosphate salt and a binder with melting point 85° to 120° F. In the preferred composition there is present dichloroisocyanurate, sodium tripolyphosphate and lauric acid, respectively. These core particles have a uniform round shape, are of high strength and obtainable in good yields.
Inventors
- 👤 Kil Whan Chun
- 👤 Allan H. Gilbert
- 👤 David J. Lang
- 👤 Edward Santos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:56
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/0039; C11D3/00; C11D3/16; C11D3/20; C11D3/2075; C11D3/2079; C11D3/395; C11D3/3958
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
59 words
Hard spherical bleaching particles whose composition is an intimately dispersed agglomerated mixture comprising: (i) from about 1 to about 805 by weight of an alkali metal dichloroisocyanurate; (ii) from about 1 to about 80% of an alkali metal salt of tripolyphosphate; and (iii) from about 0.5 to about 60% of a binder with melting point 85° to 120° F.
Claim 2
Dependent Claim
59 words
Hard spherical bleaching particles whose composition is an intimately dispersed agglomerated mixture comprising: (i) from about 1 to about 805 by weight of an alkali metal dichloroisocyanurate; (ii) from about 1 to about 80% of an alkali metal salt of tripolyphosphate; and (iii) from about 0.5 to about 60% of a binder with melting point 85° to 120° F.
Claim 3
Dependent Claim
11 words
Particles according to claim 1 wherein the binder is lauric acid.
Claim 4
Dependent Claim
10 words
Particles according to claim 1 wherein the binder is soap.
Claim 5
Dependent Claim
20 words
Particles according to claim 1 wherein the oxidizing material is present in an amount from about 40 to about 60%.
Claim 6
Dependent Claim
13 words
Particles according to claim 1 wherein the inorganic phosphate salt is sodium tripolyphosphate.
Claim 7
Dependent Claim
16 words
Particles according to claim 5 wherein sodium tripolyphosphate is present from about 10 to about 50%.
Claim 8
Dependent Claim
16 words
Particles according to claim 1 wherein the binder is present from about 10 to about 30%.
Claim 9
Dependent Claim
9 words
Particles according to claim 1 encapsulated by a coating.
Claim 10
Dependent Claim
19 words
Particles according to claim 8 wherein the coating is soap in an amount from about 0.5 to about 50%.
Claim 11
Dependent Claim
46 words
A detergent composition comprising from about 0.5 to about 80% of hard spherical bleaching particles according to claim 1 and from about 2 to about 50% by weight of a surfactant selected from the group consisting of anionic, nonionic, zwitterionic, amphoteric, cationic surfactants and mixtures thereof.
Claim 12
Dependent Claim
21 words
A detergent according to claim 10 further comprising from about 2 to about 80% of an organic or inorganic builder salt.
Claim 13
Dependent Claim
23 words
A method for bleaching substrates comprising applying the hard spherical bleaching particles of claim 1 suspended in an aqueous medium to said substrate.
Claim 14
Dependent Claim
22 words
A method according to claim 12 wherein the substrate is selected from the group consisting of fabrics, dentures, metals, ceramics and wood.
Claim 15
Dependent Claim
105 words
A process for preparing hard spherical bleaching particles whose composition is an intimately dispersed agglomerated mixture comprising the steps of: (a) mixing a combination comprising: (i) from about 1 to about 80% by weight of an alkali metal dichloroisocyanurate (ii) from about 1 to about 80% of an alkali metal salt of tripolyphosphate; and (iii) from about 0.5 to about 60% of a binder with melting point 85° to 120° F.; (b) heating said combination during said mixing step to a temperature slightly above the melting point of said binder; (c) cooling the resultant agglomerated particles; and (d) separating particles of U.S. mesh size 18-25.
Claim 16
Dependent Claim
105 words
A process for preparing hard spherical bleaching particles whose composition is an intimately dispersed agglomerated mixture comprising the steps of: (a) mixing a combination comprising: (i) from about 1 to about 80% by weight of an alkali metal dichloroisocyanurate (ii) from about 1 to about 80% of an alkali metal salt of tripolyphosphate; and (iii) from about 0.5 to about 60% of a binder with melting point 85° to 120° F.; (b) heating said combination during said mixing step to a temperature slightly above the melting point of said binder; (c) cooling the resultant agglomerated particles; and (d) separating particles of U.S. mesh size 18-25.
Claim 17
Dependent Claim
23 words
A process according to claim 14 further comprising the step of spraying an aqueous soap solution onto the particles of U.S. mesh 18-25.
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) | 1990-11-16 | 1991-05-18 | 1991-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-16 | 1995-05-18 | 1995-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-16 | 1999-05-18 | 1999-11-17 | $7700.00 | Window Closed / Lapsed |