US5246918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing perfumed personal products
Assignee: Givaudan Nederland Services BV
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Filing: 1992-10-19
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Granted: 1993-09-21
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Expires: 2012-10-19
Abstract
Abstract The invention concerns a process for incorporating a perfume into a personal product, wherein the perfume is first combined with one or more non-ionic emulsifiers and an aqueous phase to form a structured emulsion containing liquid crystal structures, which surround the dispersed perfume, and thereafter this structured emulsion is dispersed into a personal product base. The invention also concerns the personal products thus obtained and the structured emulsions used in the process. The structured emulsions comprise 1-30% by weight of one or more non-ionic emulsifiers, 1-50% by weight of a perfume and 20-98% by weight of an aqueous phase. Preferably low shear mixing is used in preparing the emulsions.
Inventors
- 👤 John M. Behan
- 👤 Jeremy N. Ness
- 👤 Keith D. Perring
- 👤 William M. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:16
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/02; A61K8/0295; A61Q; A61Q13/00; C; C11; C11D; C11D3/00; C11D3/50
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
182 words
An opaque perfume-containing structured emulsion containing liquid crystal structures, said emulsion comprising 4-25% by weight of one or more non-ionic emulsifiers having an HLB above 10, 10-50% by weight of a perfume and at least 35% by weight of an aqueous phase, the non-ionic emulsifier being chosen from: i.a. (polyethoxylated) fatty alcohols of the formula: CH3--(CH2).sub.x --(CH═CH).sub.y --(CH2).sub.z --(O--CH2--CH2).sub.w --OH wherein: W ranges from 0-20; y is 0 or 1; x+z+2y=11-23; 1.b Branched (polyethoxylated) fatty alcohols of the formula: R--(O--CH2--CH2).sub.w --OH wherein: R is a branched alkyl group of 12-18 carbon atoms and w is as specified above; ii. Glycerol mono-fatty acid esters; iii. Fatty acid esters of polyethylene glycols of the formula: R1--(O--CH.sub.2 --CH.sub.2).sub.w --OH or R1--(O--CH.sub.2 --CH.sub.2).sub.w --O--R1 wherein: R1 is a stearoyl, lauroyl, oleoyl or palmitoyl residue; w ranges from 2-20; iv. Sorbitan fatty acid mono- and tri-esters of the formula: ##STR5## wherein: R1 is H or ##STR6## and w ranges from 10-16; v. Polyethoxylated sorbitan fatty acid esters, particularly those of the formula: ##STR7## wherein: R1 is H or ##STR8## u ranges from 10-16 and (w+x+y+z) is 2-20.
Claim 2
Dependent Claim
182 words
An opaque perfume-containing structured emulsion containing liquid crystal structures, said emulsion comprising 4-25% by weight of one or more non-ionic emulsifiers having an HLB above 10, 10-50% by weight of a perfume and at least 35% by weight of an aqueous phase, the non-ionic emulsifier being chosen from: i.a. (polyethoxylated) fatty alcohols of the formula: CH3--(CH2).sub.x --(CH═CH).sub.y --(CH2).sub.z --(O--CH2--CH2).sub.w --OH wherein: W ranges from 0-20; y is 0 or 1; x+z+2y=11-23; 1.b Branched (polyethoxylated) fatty alcohols of the formula: R--(O--CH2--CH2).sub.w --OH wherein: R is a branched alkyl group of 12-18 carbon atoms and w is as specified above; ii. Glycerol mono-fatty acid esters; iii. Fatty acid esters of polyethylene glycols of the formula: R1--(O--CH.sub.2 --CH.sub.2).sub.w --OH or R1--(O--CH.sub.2 --CH.sub.2).sub.w --O--R1 wherein: R1 is a stearoyl, lauroyl, oleoyl or palmitoyl residue; w ranges from 2-20; iv. Sorbitan fatty acid mono- and tri-esters of the formula: ##STR5## wherein: R1 is H or ##STR6## and w ranges from 10-16; v. Polyethoxylated sorbitan fatty acid esters, particularly those of the formula: ##STR7## wherein: R1 is H or ##STR8## u ranges from 10-16 and (w+x+y+z) is 2-20.
Claim 3
Dependent Claim
42 words
A structured emulsion according to claim 1 wherein the non-aqueous phase additionally comprises one or more structuring aids chosen from surfactants other than non-ionics in an amount of 0-50% and sterols in an amount of 0-100% by weight of the non-ionic emulsifier(s).
Claim 4
Dependent Claim
24 words
A structured emulsion according to claim 1 wherein the perfume contains hydrophobic adjuncts in an amount of 0-30% by weight of the non-aqueous phase.
Claim 5
Dependent Claim
25 words
A structured emulsion according to claim 1 wherein the aqueous phase contains hydrophilic adjuncts in an amount of 0-30% by weight of the aqueous phase.
Claim 6
Dependent Claim
57 words
A structured emulsion according to claim 1 comprising 10-20% by weight of non-ionic emulsifier(s) and 10-40% of perfume and wherein the weight ratio of total emulsifier, including optional structuring aids, to perfume lies within the range 1:3 to 3:1, and the weight ratio of non-aqueous phase to aqueous phase lies within the range of 1:2 to 4:3.
Claim 7
Dependent Claim
33 words
A structured emulsion according to claim 1 wherein the structuring aids are surfactants selected from the group consisting of cetyltrimethyl-ammonium bromide, cetyltrimethyl-ammonium chloride, sodium lauryl sulphate, sodium dodecylbenzenesulphonate, and the sterol is cholesterol.
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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) | 1996-09-20 | 1997-03-22 | 1997-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-20 | 2001-03-22 | 2001-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-20 | 2005-03-22 | 2005-09-21 | $7700.00 | Window Closed / Lapsed |