US5972508A
Expired / Lapsed
US
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Microcapsules containing bleaching aids
Assignee: BASF SE
•
Filing: 1997-10-31
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Granted: 1999-10-26
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Expires: 2017-10-31
Abstract
Abstract The microcapsules containing bleaching agents are obtainable by polymerizing monomer mixtures which comprise 5-100% by weight of at least one ethylenically unsaturated carboxylic anhydride (a), 0-95% by weight of at least one monoethylenically unsaturated monomer (b) different from the monomers of group (a), 0-80% by weight of crosslinking monomers (c) which have at least two nonconjugated monoethylenic double bonds in the molecule, and 0-20% by weight of water-soluble monoethylenically unsaturated monomers (d), where the total of components (a) to (d) is 100% by weight. The polymerization takes place in the oil phase of a stable oil-in-water emulsion in the presence of free-radical polymerization initiators, where the temperature of the polymerizing reaction mixture is, where appropriate, increased continuously or periodically during the polymerization. The oil phase contains or consists of the bleaching aid.
Inventors
- 👤 Dieter Boeckh
- 👤 Birgit Potthoff-Karl
- 👤 Werner Bertleff
- 👤 Peter Neumann
- 👤 Ekkehard Jahns
- 👤 Ralf Biastoch
- 👤 Thomas Wehlage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:48
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3902; C11D3/3905; C11D3/3935; B; B01; B01J; B01J13/00; B01J13/02; B01J13/06; B01J13/14; B01J13/18; C11D17/00; C11D17/0039; C11D3/16; C11D3/37; C11D3/3746; C11D3/3757; C11D3/3761; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987; Y10T428/2989
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
120 words
A microcapsule containing bleaching aids, obtainable by polymerizing monomer mixtures which comprise 5-100% by weight of at least one ethylenically unsaturated carboxylic anhydride (a), 0-95% by weight of at least one monoethylenically unsaturated monomer (b) different from the monomers of group (a), 0-80% by weight of crosslinking monomers (c) which have at least two nonconjugated monoethylenic double bonds in the molecule, and 0-20% by weight of water-soluble monoethylenically unsaturated monomers (d), where the total of components (a) to (d) is 100% by weight, in the oil phase of a stable oil-in-water emulsion in the presence of free-radical polymerization initiators, where the temperature of the polymerizing reaction mixture ranges from 20-100° C., and where the oil phase contains the bleaching aid.
Claim 2
Dependent Claim
120 words
A microcapsule containing bleaching aids, obtainable by polymerizing monomer mixtures which comprise 5-100% by weight of at least one ethylenically unsaturated carboxylic anhydride (a), 0-95% by weight of at least one monoethylenically unsaturated monomer (b) different from the monomers of group (a), 0-80% by weight of crosslinking monomers (c) which have at least two nonconjugated monoethylenic double bonds in the molecule, and 0-20% by weight of water-soluble monoethylenically unsaturated monomers (d), where the total of components (a) to (d) is 100% by weight, in the oil phase of a stable oil-in-water emulsion in the presence of free-radical polymerization initiators, where the temperature of the polymerizing reaction mixture ranges from 20-100° C., and where the oil phase contains the bleaching aid.
Claim 3
Dependent Claim
16 words
A microcapsule as claimed in claim 1, where the oil phase consists of the bleaching aid.
Claim 4
Dependent Claim
32 words
A microcapsule as claimed in claim 1, where the carboxylic anhydrides (a) are selected from internal anhydrides of ethylenically unsaturated dicarboxylic acids and anhydrides of ethylenically unsaturated monocarboxylic acids or mixtures thereof.
Claim 5
Dependent Claim
18 words
A microcapsule as claimed in claim 1, where the bleaching aid is a bleach activator and/or bleach catalyst.
Claim 6
Dependent Claim
123 words
A process for producing microcapsules containing bleaching aids, wherein monomer mixtures which comprise 5-100% by weight of at least one ethylenically unsaturated carboxylic anhydride (a), 0-95% by weight of at least one monoethylenically unsaturated monomer (b) different from the monomers of group (a), 0-80% by weight of crosslinking monomers (c) which have at least two nonconjugated monoethylenic double bonds in the molecule, and 0-20% by weight of water-soluble monoethylenically unsaturated monomers (d), where the total of components (a) to (d) is 100% by weight, are polymerized in the oil phase of a stable oil-in-water emulsion in the presence of free-radical polymerization initiators, where the temperature of the polymerizing reaction mixture ranges from 20-100° C., and where the oil phase contains the bleaching aid.
Claim 7
Dependent Claim
123 words
A process for producing microcapsules containing bleaching aids, wherein monomer mixtures which comprise 5-100% by weight of at least one ethylenically unsaturated carboxylic anhydride (a), 0-95% by weight of at least one monoethylenically unsaturated monomer (b) different from the monomers of group (a), 0-80% by weight of crosslinking monomers (c) which have at least two nonconjugated monoethylenic double bonds in the molecule, and 0-20% by weight of water-soluble monoethylenically unsaturated monomers (d), where the total of components (a) to (d) is 100% by weight, are polymerized in the oil phase of a stable oil-in-water emulsion in the presence of free-radical polymerization initiators, where the temperature of the polymerizing reaction mixture ranges from 20-100° C., and where the oil phase contains the bleaching aid.
Claim 8
Dependent Claim
20 words
A process as claimed in claim 5, wherein electrolytes are added to the aqueous phase for producing the oil-in-water emulsion.
Claim 9
Dependent Claim
19 words
A detergent or cleaner comprising 0.01-30% by weight of microcapsules as claimed in claim 1 and other conventional ingredients.
Claim 10
Dependent Claim
77 words
A detergent or cleaner as claimed in claim 7, comprising 0.5-50% by weight of at least one anionic and/or nonionic surfactant, 0.5-60% by weight of at least one inorganic builder, 0-20% by weight of at least one organic cobuilder, 0-35% by weight of perborate or percarbonate, 0.1-20% by weight of microcapsules as claimed in claim 1, 0-5% by weight of a polymeric color transfer inhibitor, 0-1.5% by weight of protease, 0-1.5% by weight of other detergent enzymes,
Claim 11
Dependent Claim
19 words
- 1. 5% by weight of a soil release polymer and/or antiredeposition agent, and 100% conventional auxiliaries and water.
Claim 12
Dependent Claim
19 words
- 1. 5% by weight of a soil release polymer and/or antiredeposition agent, and 100% conventional auxiliaries and water.
Claim 13
Dependent Claim
32 words
The method controlled releasing of bleaching aids present in the core material of the microcapsules as claimed in claim 1 by destruction of their shell resulting from the action of aqueous bases.
Claim 14
Dependent Claim
16 words
The microcapsule of claim 1, wherein said temperature is increased continuously within said range during polymerization.
Claim 15
Dependent Claim
16 words
The microcapsule of claim 1, wherein said temperature is periodically increased within said range during polymerization.
Claim 16
Dependent Claim
14 words
The microcapsule of claim 1, wherein the oil phase consists of the bleaching aid.
Claim 17
Dependent Claim
16 words
The process of claim 5, wherein said temperature during polymerization within said range is continuously increased.
Claim 18
Dependent Claim
16 words
The process of claim 5, wherein said temperature during polymerization within said range is periodically increased.
Claim 19
Dependent Claim
14 words
The process of claim 5, wherein the oil phase consists of the bleaching aid.
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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) | 2002-10-25 | 2003-04-26 | 2003-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-10-25 | 2007-04-26 | 2007-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-10-25 | 2011-04-26 | 2011-10-26 | $7700.00 | Window Closed / Lapsed |