US6951836B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microcapsule preparations and detergents and cleaning agents containing microcapsules
Assignee: BASF SE
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Filing: 2001-01-04
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Granted: 2005-10-04
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Expires: 2021-01-04
Abstract
Abstract Described are microcapsule formulations comprising microcapsules having a core of a hydrophobic material, which encloses at least one fragrance or perfume, and a capsule shell which is obtainable by either i) free-radical polymerization of ethylenically unsaturated monomers comprising: from 30 to 100% by weight of one or more C 1 -C 24 alkyl esters of acrylic and/or methacrylic acid, from 0 to 70% by weight of a bi- or polyfunctional monomer, from 0 to 40% by weight of other monomers; or ii) acid-induced condensation of melamine-formaldehyde precondensates and/or their C 1 -C 4 alkyl ethers. Also described are laundry detergent or cleaning product compositions which comprise the microcapsules.
Inventors
- 👤 Ekkehard Jahns
- 👤 Dieter Boeckh
- 👤 Werner Bertleff
- 👤 Peter Neumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:55
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/0039; C11D3/00; C11D3/16; C11D3/37; C11D3/3703; C11D3/3746; C11D3/3757; C11D3/50; C11D3/502; C11D3/505
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
194 words
A microcapsule formulation comprising: microcapsules having a core of a hydrophobic material, at least one fragrance or perfume, which is contained in the core of hydrophobic material, and a capsule shell, wherein the ratio of the capsule shell thickness to the diameter of the microcapsules is in the range of 0.005 to 0.1; wherein said microcapsule formulation is obtained by: a) dissolving an ethylenically unsaturated monomer comprising: from 30 to 100% by weight of one or more C 1 -C 24 alkyl esters of acrylic and/or methacrylic acid, from 0 to 70% by weight of a bi- or polyfunctional monomer, from 0 to 40% by weight of other monomers; and a polymerization initiator in the hydrophobic material, b) emulsifying the resulting solution in an aqueous medium to obtain an oil-in-water emulsion; c) heating the emulsion to the decomposition temperature of the polymerization initiator, thereby inducing free-radical polymerization of the monomer to produce a polymer which is soluble neither in the oil phase nor in the water phase of the oil-in-water-emulsion and which migrates to the interphase between the oil droplets in the water phase and ultimately encases the hydrophobic material core of the microcapsules.
Claim 2
Dependent Claim
194 words
A microcapsule formulation comprising: microcapsules having a core of a hydrophobic material, at least one fragrance or perfume, which is contained in the core of hydrophobic material, and a capsule shell, wherein the ratio of the capsule shell thickness to the diameter of the microcapsules is in the range of 0.005 to 0.1; wherein said microcapsule formulation is obtained by: a) dissolving an ethylenically unsaturated monomer comprising: from 30 to 100% by weight of one or more C 1 -C 24 alkyl esters of acrylic and/or methacrylic acid, from 0 to 70% by weight of a bi- or polyfunctional monomer, from 0 to 40% by weight of other monomers; and a polymerization initiator in the hydrophobic material, b) emulsifying the resulting solution in an aqueous medium to obtain an oil-in-water emulsion; c) heating the emulsion to the decomposition temperature of the polymerization initiator, thereby inducing free-radical polymerization of the monomer to produce a polymer which is soluble neither in the oil phase nor in the water phase of the oil-in-water-emulsion and which migrates to the interphase between the oil droplets in the water phase and ultimately encases the hydrophobic material core of the microcapsules.
Claim 3
Dependent Claim
16 words
The microcapsule formulation of claim 1 , wherein the hydrophobic material is liquid at 20° C.
Claim 4
Dependent Claim
18 words
The microcapsule formulation of claim 1 , wherein the hydrophobic material is an oil, paraffin, chloroparaffin, or fluorocarbon.
Claim 5
Dependent Claim
60 words
The microcapsule formulation of claim 1 , wherein the hydrophobic material is selected from the group consisting of at least one sunflower oil, rapeseed oil, olive oil, peanut oil, soybean oil, kerosene, benzene, toluene, butane, pentane, hexane, cyclohexane, chloroform, tetrachiorocarbon, chlorinated phenyl, silicone oil, diethyl phthalate, dibutyl phthalate, diisohexyl phthalate, dioctyl phthalate, alkyl naphthalene, dodecylbenzene, terphenyl, and partially hydrogenated terphenyl.
Claim 6
Dependent Claim
40 words
The microcapsule formulation of claim 1 , wherein the fragrance is hexylcinnamaldehyde, 2-methyl-3-(tert-butylphenyl)-propionaldehyde, 7-acetyl-1,2,3,4,5,6,7,8-octahydro-1,1,6,7-tetramethylnaphthalene, benzyl salicylate, 7 -acetyl-1,1,3,4,4,6-hexamethyltetralin, para-tert-butylcyclohexyl acetate, methyl dihydrojasmonate, β-naphthol methyl ether, methyl β-naphthyl ketone, 1,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethylcyclopenta-γ-2-benzopyran, dodecahydro-3a,6,6,9a-tetramethylnaphthol[2,1b]furan, anisaldehyde, coumarin, cedrol, vanillin, cyclopentadecanolide, tricyclodecenyl acetate and tricyclodecenyl propionate.
Claim 7
Dependent Claim
49 words
The microcapsule formulation of claim 1 , wherein the fragrance comprises at least one fragrance selected from the group consisting of Peru balsam, olibanum resinoid, styrax, labdanum resin, nutmeg, cassia oil, benzoin resin, coriander, lavandin, phenylethyl alcohol, terpineol, linalool, linalyl acetate, geraniol, nerol, 2-(1,1-dimethylethyl)cyclohexanol acetate, benzyl acetate, and eugenol.
Claim 8
Dependent Claim
58 words
The microcapsule formulation of claim 1 , wherein the capsule shell is obtained by polymerizing from 30 to 95% by weight of one or more C 1 -C 24 alkyl esters of acrylic and/or methacrylic acid, from 5 to 40% by weight of a bi- or polyfunctional monomer, and from 0 to 30% by weight of other monomers.
Claim 9
Dependent Claim
19 words
The microcapsule formulation of claim 1 , wherein step b) is carried out in the presence of protective colloid.
Claim 10
Dependent Claim
29 words
The microcapsule formulation of claim 1 , wherein the ratio of the capsule shell thickness to the diameter of the microcapsules is in the range of 0.01 to 0.05.
Claim 11
Dependent Claim
23 words
The microcapsule formulation of claim 1 , wherein the average diameter of the microcapsules is in the range from 1 to 100 μm.
Claim 12
Dependent Claim
23 words
The microcapsule formulation of claim 1 , wherein the average diameter of the microcapsules is in the range from 3 to 50 μm.
Claim 13
Dependent Claim
17 words
A composition comprising the microcapsule formulation of claim 1 , and one or more surfactant(s) or builder(s).
Claim 14
Dependent Claim
18 words
A composition comprising the microcapsule formulation of claim 1 , and one or more bleach(es) or bleach activator(s).
Claim 15
Dependent Claim
45 words
A composition comprising the microcapsule formulation of claim 1 , and one or more stardardizing agent(s), complexing agent(s), phosphate(s), dye(s), corrosion inhibitor(s), grayness inhibitor(s), soil release polymer(s), color transfer inhibitor(s), bleach stabilizer(s), peroxide stabilizer(s), electrolyte(s), optical brightener(s), enzyme(s), foam regulator(s), pH regulator(s), or viscosity regulator(s).
Claim 16
Dependent Claim
23 words
A composition comprising the microcapsule formulation of claim 1 which is formulated as a laundry detergent or as a cleaning product for textiles.
Claim 17
Dependent Claim
19 words
A composition comprising the microcapsule formulation of claim 1 which is formulated as a cleaning product for non-textile surfaces.
Claim 18
Dependent Claim
93 words
A process for preparing the microcapsule formulation of claim 1 , comprising: emulsifing in water a hydrophobic material comprising at least one fragrance or perfume with ethylenically unsaturated monomers, which monomers comprise: from 30 to 100% by weight of one or more C 1 -C 24 alkyl esters of acrylic and/or methacrylic acid, from 0 to 70% by weight of a bi- or polyfunctional monomer, and from 0 to 40% by weight of other monomers, adding at least one polymerization initiator, and heating the mixture to the thermal decomposition of the polymerization initiator.
Claim 19
Dependent Claim
14 words
The process of claim 17 further comprising adding a protective colloid to said mixture.
Claim 20
Dependent Claim
43 words
The process of claim 17 , futher comprising adding a protective colloid to said mixture, wherein said protective colloid has a Fikentscher K value ranging from 100 to 170 or a viscosity ranging from 200 to 5,000 mPa·s at 489 s −1 .
Claim 21
Dependent Claim
16 words
The process of claim 17 , futher comprising adding at least one emulsifier to said mixture.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2008-10-03 | 2009-04-04 | 2009-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2012-10-03 | 2013-04-04 | 2013-10-04 | $3760.00 | Window Closed / Lapsed |
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