Patent US3880054A successfully refreshed from Google Patents.
Patent CA513513A successfully refreshed from Google Patents.
Patent US4735742A successfully refreshed from Google Patents.
US4735742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Palmitate-stearate o/w emulsions and their preparation
Assignee: Henkel AG and Co KGaA
•
Filing: 1986-09-05
•
Granted: 1988-04-05
•
Expires: 2006-09-05
Abstract
Abstract An oil-in-water emulsion and method for forming same, containing as the primary emulsifier, a palmitic acid soap and a stearic acid soap, in a palmitic:stearic weight ratio of 1:025-0.67.
Inventors
- 👤 Achim Ansmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:00
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/02; A61K8/04; A61K8/06; A61K8/062; A61K8/18; A61K8/30; A61K8/33; A61K8/36; A61K8/361; A61K9/00; A61K9/10; A61K9/107; A61Q; A61Q19/00; C; C09; C09K; C09K23/00; C09K23/34
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
105 words
In an oil-in-water emulsion comprising: a discontinuous oil and oil-soluble-component phase (O); a continuous water and water-soluble-component phase (W) in an O:W weight ratio of about 1:1.5-9; and at least one emulsifier; the improvement of employing as one said emulsifier an emulsifier-effective amount of a combination of at least one palmitic acid soap and at least one stearic acid soap in a palmitic:stearic weight ratio of about 1:0.25-0.67, wherein the saponification base for each said palmitic acid soap and each said stearic acid soap is at least one of: sodium, potassium, ammonium, mono (C 2-4 -alkanol) amine, di(C 2-4 -alkanol)amine, or tri(C 2-4 -alkanol) amine.
Claim 2
Dependent Claim
105 words
In an oil-in-water emulsion comprising: a discontinuous oil and oil-soluble-component phase (O); a continuous water and water-soluble-component phase (W) in an O:W weight ratio of about 1:1.5-9; and at least one emulsifier; the improvement of employing as one said emulsifier an emulsifier-effective amount of a combination of at least one palmitic acid soap and at least one stearic acid soap in a palmitic:stearic weight ratio of about 1:0.25-0.67, wherein the saponification base for each said palmitic acid soap and each said stearic acid soap is at least one of: sodium, potassium, ammonium, mono (C 2-4 -alkanol) amine, di(C 2-4 -alkanol)amine, or tri(C 2-4 -alkanol) amine.
Claim 3
Dependent Claim
13 words
The emulsion of claim 1 wherein said palmitic:stearic weight ratio is about 1:0.33-0.53.
Claim 4
Dependent Claim
69 words
The emulsion of claim 2 wherein said water-soluble-component consists essentially of: propylene glycol, polyethylene glycol, hexylene glycol, glycerol, sorbitol, or a mixture thereof, present in about 1-30% by weight; and/or a polysaccharide, polysaccharide ether, acrylic acid polymer or copolymer which may be crosslinked, polyvinyl alcohol, polyvinyl pyrrolidone, or a mixture thereof, present in about 0.05-3% by weight; all percentages based upon the weight of the water and water-soluble-component phase.
Claim 5
Dependent Claim
13 words
The emulsion of claim 1 wherein said palmitic-stearic weight ratio is about 1:0.43.
Claim 6
Dependent Claim
14 words
The emulsion of claim 1 wherein the saponification base for said soaps is triethanolamine.
Claim 7
Dependent Claim
28 words
The emulsion of claim 1 wherein said at least one emulsifier is present in about 1-50% by weight, based upon the weight of said oil and oil-soluble-components phase.
Claim 8
Dependent Claim
49 words
The emulsion of claim 1 wherein said emulsifier is formed in situ by the saponification of at least part of said palmitic and stearic acids with at least one saponification base, the amount of formed emulsifier being determined by saponifying until said emulsion has a pH of about 4.5-8.5.
Claim 9
Dependent Claim
22 words
The emulsion of claim 7 wherein said palmitic and stearic acids are only partially saponified and wherein the unsaponified acids are oil-soluble-components.
Claim 10
Dependent Claim
69 words
The emulsion of claim 8 wherein said water-soluble-component consists essentially of: propylene glycol, polyethylene glycol, hexylene glycol, glycerol, sorbitol, or a mixture thereof, present in about 1-30% by weight; and/or a polysaccharide, polysaccharide ether, acrylic acid polymer or copolymer which may be crosslinked, polyvinyl alcohol, polyvinyl pyrrolidone, or a mixture thereof, present in about 0.05-3% by weight; all percentages based upon the weight of the water and water-soluble-component phase.
Claim 11
Dependent Claim
19 words
The emulsion of claim 1 wherein said water-soluble-component consists essentially of at least one glycol, polyol, polymer, or copolymer.
Claim 12
Dependent Claim
69 words
The emulsion of claim 1 wherein said water-soluble-component consists essentially of: propylene glycol, polyethylene glycol, hexylene glycol, glycerol, sorbitol, or a mixture thereof, present in about 1-30% by weight; and/or a polysaccharide, polysaccharide ether, acrylic acid polymer or copolymer which may be crosslinked, polyvinyl alcohol, polyvinyl pyrrolidone, or a mixture thereof, present in about 0.05-3% by weight; all percentages based upon the weight of the water and water-soluble-component phase.
Claim 13
Independent Claim
153 words
A method for preparing an oil-in-water emulsion comprising a discontinuous oil and oil-soluble-components phase (O), a continuous water and water-soluble-components phase (W) in an O:W weight ratio of about 1:1.5-9, and an emulsifier-effective amount of at least one emulsifier consisting essentially of a palmitic acid soap and a stearic acid soap in a palmitic:stearic ratio of about 1:0.25-0.67, wherein said soaps are formed in situ during the emulsion formation by (a) including said palmitic acid and said stearic acid in said oil soluble-components, (b) including at least one water-soluble saponification base comprising sodium, potassium, ammonium, mono(C 2 -C 4 -alkanol) amine, di(C 2 -C 4 -alkanol) amine, or tri(C 2 -C 4 -alkanol)amine, in said water-soluble components, (c) combining said oil phase and said water phase accompanied by mixing and heating to effect saponification of said acids, and (d) continuing said saponification until an emulsion is formed having a pH of about 4.5-8.5.
Claim 14
Independent Claim
153 words
A method for preparing an oil-in-water emulsion comprising a discontinuous oil and oil-soluble-components phase (O), a continuous water and water-soluble-components phase (W) in an O:W weight ratio of about 1:1.5-9, and an emulsifier-effective amount of at least one emulsifier consisting essentially of a palmitic acid soap and a stearic acid soap in a palmitic:stearic ratio of about 1:0.25-0.67, wherein said soaps are formed in situ during the emulsion formation by (a) including said palmitic acid and said stearic acid in said oil soluble-components, (b) including at least one water-soluble saponification base comprising sodium, potassium, ammonium, mono(C 2 -C 4 -alkanol) amine, di(C 2 -C 4 -alkanol) amine, or tri(C 2 -C 4 -alkanol)amine, in said water-soluble components, (c) combining said oil phase and said water phase accompanied by mixing and heating to effect saponification of said acids, and (d) continuing said saponification until an emulsion is formed having a pH of about 4.5-8.5.
Claim 15
Dependent Claim
46 words
The method of claim 12 wherein: said palmitic acid and said stearic acid are added to said oil-soluble-components in a palmitic:stearic ratio of about 1:0.43; and the saponification of said acids is only partial, the unsaponified acids remaining in the discontinuous oil phase of said emulsion.
Claim 16
Dependent Claim
18 words
The method claim 13 wherein said saponification is continued until said emulsion has a pH of about 6.5-7.5.
Claim 17
Dependent Claim
18 words
The method claim 12 wherein said saponification is continued until said emulsion has a pH of about 6.5-7.5.
References Cited (Backward Citations)
CA775080A
Cited
GB145602A
Cited
US1930845A
Cited
US2207256A
Cited
FR907881A
Cited
US2573599A
Cited
US2684949A
Cited
US2798053A
Cited
GB780801A
Cited
US4234450A
Cited
EP0111895A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-05 | 1991-10-05 | 1992-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-05 | 1995-10-05 | 1996-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-05 | 1999-10-05 | 2000-04-05 | $7700.00 | Window Closed / Lapsed |