EP0303461A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Skin treatment composition
Assignee: Unilever PLC
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Filing: 1988-08-10
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Granted: —
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Expires: 2008-08-10
Abstract
Abstract An alcoholic composition containing no more than 3% by weight of water, which is suitable for topical application to human skin comprises moisture-sensitive capsules and an alcohol chosen from C₂₋₆ alkanols and mixtures thereof the moisture sensitive capsules having an average particle size of not greater than 100µm, and comprising a non-aqueous substance encapsulated by a polymer, the capsules being: (a) resistant to extraction with alcohol such that not more than 15% by weight of the non-aqueous substance originally present in the capsules is leached from the capsules during continuous extraction of the intact capsules for a period of 30 days at 20°C with ethanol containing not more than 1% by weight of water; and (b) sensitive to moisture such that on contact with water at the skin surface, the capsules release the encapsulated non-aqueous substance.
Inventors
- 👤 Gordon Robert Wight
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 08:34
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/02; A61K8/11; A61Q; A61Q13/00; A61Q15/00; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
153 words
An alcoholic composition suitable for topical application to human skin, which comprises: (i) from 0.1 to 20% by weight of moisture-sensitive casules; and (ii) from 10 to 99.9% by weight of an alcohol chosen from C₂₋₆ alkanols and mixtures thereof; the composition comprising no more than 3% by weight of water; the moisture sensitive capsules having an average particle size of not greater than 100µm, and comprising a non-aqueous substance encapsulated by a polymer, the capsules being: (a) resistant to extraction with alcohol such that not more than 15% by weight of the non-aqueous substance originally present in the capsules is leached from the capsules during continuous extraction of the intact capsules for a period of 30 days at 20°C with ethanol containing not more than 1% by weight of water; and (b) sensitive to moisture such that on contact with water at the skin surface, the capsules release the encapsulated non-aqueous substance.
Claim 2
Dependent Claim
153 words
An alcoholic composition suitable for topical application to human skin, which comprises: (i) from 0.1 to 20% by weight of moisture-sensitive casules; and (ii) from 10 to 99.9% by weight of an alcohol chosen from C₂₋₆ alkanols and mixtures thereof; the composition comprising no more than 3% by weight of water; the moisture sensitive capsules having an average particle size of not greater than 100µm, and comprising a non-aqueous substance encapsulated by a polymer, the capsules being: (a) resistant to extraction with alcohol such that not more than 15% by weight of the non-aqueous substance originally present in the capsules is leached from the capsules during continuous extraction of the intact capsules for a period of 30 days at 20°C with ethanol containing not more than 1% by weight of water; and (b) sensitive to moisture such that on contact with water at the skin surface, the capsules release the encapsulated non-aqueous substance.
Claim 3
Dependent Claim
35 words
A composition according to claim 1, in which the polymer is characterised by resistance to extraction with alcohol such that not more than 10% by weight of the non-aqueous substance is leached from the capsules.
Claim 4
Dependent Claim
15 words
A composition according to claim 1 or 2, in which the polymer is a polysaccharide.
Claim 5
Dependent Claim
16 words
A composition according to claim 1, 2 or 3, in which the polymer is a dextrin.
Claim 6
Dependent Claim
46 words
A composition according to claim 4, in which the dextrin is one which, as a 50% dispersion in water has a viscosity at 25°C, using a Brookfield Viscometer fitted with an "A" type T-bar rotating at 20 rpm in helical mode, of 330 ± 20 mPas.
Claim 7
Dependent Claim
16 words
A composition according to claim 1, 2 or 3, in which the polymer is gum acacia.
Claim 8
Dependent Claim
16 words
A composition according to any preceding claim, in which the encapsulated non-aqueous substance is a perfume.
Claim 9
Dependent Claim
14 words
A composition according to claim 7, in which the perfume is a deodorant perfume.
Claim 10
Dependent Claim
19 words
A composition according to any of claims 1 to 6, in which the encapsulated non-aqueous substance is a coolant.
Claim 11
Dependent Claim
16 words
A composition according to claim 9, in which the coolant is menthol or a derivative thereof.
Claim 12
Dependent Claim
27 words
A composition according to any preceding claim, in which the non-aqueous substance is chosen from emollients, deodorants other than perfume, antiperspirant actives, anticholinergic actives and mixtures thereof.
Claim 13
Dependent Claim
22 words
A composition according to any preceding claim, in which the moisture-sensitive capsules form from 0.2 to 15% by weight of the composition.
Claim 14
Dependent Claim
19 words
A composition according to any preceding claim, in which the alkanol is chosen from ethanol, isopropanol and mixtures thereof.
Claim 15
Dependent Claim
12 words
A composition according to any preceding claim, further comprising a suspending agent.
Claim 16
Dependent Claim
15 words
A composition according to claim 14, in which the suspending agent is a hydrophobically-treated clay.
Claim 17
Dependent Claim
13 words
A composition according to claim 14, in which the suspending agent is hydroxypropylcellulose.
Claim 18
Dependent Claim
13 words
A composition according to claim 14, in which the suspending agent is dibenzylsorbitol.
Claim 19
Dependent Claim
21 words
A composition according to any preceding claim further comprising an antiperspirant astringent metallic salt, in addition to the moisture sensitive capsules.
Claim 20
Dependent Claim
18 words
A composition according to claim 18, in which the astringent metallic salt is an aluminium and/or zirconium salt.
Claim 21
Dependent Claim
17 words
A composition according to any preceding claim further comprising a bactericide, in addition to the moisture-sensitive capsules.
Claim 22
Dependent Claim
19 words
A composition according to any preceding claim further comprising an anticholinergic active, in addition to the moisture sensitive capsules.
Claim 23
Dependent Claim
54 words
A process for preparing an alcoholic composition according to any preceding claim, which comprises the step of suspending the moisture-sensitive capsules in an alcohol chosen from ethanol, isopropanol or a mixture thereof together with a suspending agent, said composition comprising no more than 3% by weight water, and subsequently packaging the composition so obtained.
References Cited (Backward Citations)
FR2033294A1
Cited
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