US4798682A
Expired / Lapsed
US
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Oil-in-water emulsions with increased viscosity under shear stress
Assignee: Henkel AG and Co KGaA
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Filing: 1986-06-06
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Granted: 1989-01-17
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Expires: 2006-06-06
Abstract
Abstract Oil-in-water emulsions show improved viscosity behavior, more especially an increased viscosity under shear stress, when the continuous aqueous phase contains a combinations of hydrocolloids comprising: (a) at least one water-soluble nonionic cellulose ether; and (b) a cross-linked acrylic acid polymer or copolymer having a weight average molecular weight of from 1,000,000 to 5,000,000; in the form of a water-soluble salt in a quantitative ratio a:b of from 9:1 to 1:9. Cosmetic O/W-creams according to the invention show more "body" when applied to and spread over the skin.
Inventors
- 👤 Achim Ansmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:42
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0014; A61K47/00; A61K47/30; A61K47/32; A61K47/36; A61K47/38; A61K8/00; A61K8/02; A61K8/04; A61K8/06; A61K8/062; A61K8/18; A61K8/72; A61K8/73; A61K8/731; A61K8/81; A61K8/8141; A61K8/8147; A61Q; A61Q19/00; C; C09; C09K; C09K23/00; C09K23/017; C09K23/018; A61K2800/00; A61K2800/40; A61K2800/59; A61K2800/594; A61Q19/10
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
80 words
An oil-in-water emulsion having increased viscosity under shear stress comprising a continuous aqueous phase and a discontinuous oil phase, wherein said continuous aqueous phase contains a combination of hydrocolloids consisting essentially of: (a) at least one water-soluble nonionic cellulose ether; and (b) at least on water-soluble salt of a crosslinked acrylic acid polymer or acrylic acid copolymer having a weight average molecular weight of about 1,000,000 to 5,000,000, in a ratio a:b by weight of about 9:1 to about 1:9.
Claim 2
Dependent Claim
80 words
An oil-in-water emulsion having increased viscosity under shear stress comprising a continuous aqueous phase and a discontinuous oil phase, wherein said continuous aqueous phase contains a combination of hydrocolloids consisting essentially of: (a) at least one water-soluble nonionic cellulose ether; and (b) at least on water-soluble salt of a crosslinked acrylic acid polymer or acrylic acid copolymer having a weight average molecular weight of about 1,000,000 to 5,000,000, in a ratio a:b by weight of about 9:1 to about 1:9.
Claim 3
Dependent Claim
42 words
The emulsion of claim 1 wherein: (a) has a viscosity, when in the form of a 2% by weight aqueous solution, of from about 40 to about 40,000 mPas at 20° C., as measured on a Brookfield rotational viscometer at 30 r.p.m.
Claim 4
Dependent Claim
20 words
The emulsion of claim 1 wherein: (a) is at least one methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, or methylhydroxypropyl cellulose.
Claim 5
Dependent Claim
16 words
The emulsion of claim 1 wherein: (a) is at least one hydroxypropyl cellulose, or methylhydroxypropyl cellulose.
Claim 6
Dependent Claim
51 words
The emulsion of claim 1 wherein: (b) is at least one copolymerization reaction product of acrylic acid with about 0.1 to about 4.0% by weight based on the copolymer weight of a polyalkenyl polyether of a polyhydric alcohol containing more than one alkenylether moiety in the molecule as a crosslinking agent.
Claim 7
Dependent Claim
13 words
The emulsion of claim 5 wherein said crosslinking agent is a polyallyl sucrose.
Claim 8
Dependent Claim
27 words
The emulsion of claim 1 wherein: (b) is a salt of: sodium hydroxide, potassium hydroxide, ammonia, a low molecular weight amine or a low molecular weight alkanolamine.
Claim 9
Dependent Claim
27 words
The emulsion of claim 5 wherein: (b) is a salt of: sodium hydroxide, potassium hydroxide, ammonia, a low molecular weight amine or a low molecular weight alkanolamine.
Claim 10
Dependent Claim
51 words
The emulsion of claim 2 wherein: (b) is at least one copolymerization reaction product of acrylic acid with about 0.1 to about 4.0% by weight based on the coplymer weight of a polyalkenyl polyether of a polyhydric alcohol containing more than one alkenylether moiety in the molecule as a crosslinking agent.
Claim 11
Dependent Claim
51 words
The emulsion of claim 3 wherein: (b) is at least one copolymerization reaction product of acrylic acid with about 0.1 to about 4.0% by weight based on the copolymer weight of a polyalkenyl polyether of a polyhydric alcohol containing more than one alkenylether moiety in the molecule as a crosslinking agent.
Claim 12
Dependent Claim
51 words
The emulsion of claim 4 wherein: (b) is at least one copolymerization reaction product of acrylic acid with about 0.1 to about 4.0% by weight based on the copolymer weight of a polyalkenyl polyether of a polyhydric alcohol containing more than one alkenylether moiety in the molecule as a crosslinking agent.
Claim 13
Dependent Claim
14 words
The emulsion of claim 1 wherein the ratio a:b is about 1:3 to 3:1.
Claim 14
Dependent Claim
12 words
The emulsion of claim 1 wherein the ratio a:b is about 1:1.
Claim 15
Dependent Claim
14 words
The emulsion of claim 11 wherein the ratio a:b is about 1:3 to 3:1.
Claim 16
Dependent Claim
32 words
The emulsion of claim 1 wherein said combinatin of hydrocolloids is present in a total amount of about 0.2 to about 2% by weight, based upon the total weight of the emulsion.
Claim 17
Dependent Claim
32 words
The emulsion of claim 14 wherein said combination of hydrocolloids is present in a total amount of about 0.2 to about 2% by weight, based upon the total weight of the emulsion.
Claim 18
Dependent Claim
32 words
The emulsion of claim 1 wherein said combination of hydrocolloids is present in a total amount of about 0.3 to about 1% by weight, based upon the total weight of the emulsion.
Claim 19
Dependent Claim
32 words
The emulsion of claim 14 wherein said combination of hydrocolloids is present in a total amount of about 0.3 to about 1% by weight, based upon the total weight of the emulsion.
Claim 20
Dependent Claim
27 words
The emulsion of claim 1 wherein said discontinuous oil phase and said continuous aqueous phase are present in a weight ratio of about 1:9 to about 4:6.
Claim 21
Dependent Claim
27 words
The emulsion of claim 18 wherein said discontinuous oil phase and said continuous aqueous phase are present in a weight ratio of about 1:9 to about 4:6.
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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) | 1992-01-17 | 1992-07-18 | 1993-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-17 | 1996-07-18 | 1997-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-17 | 2000-07-18 | 2001-01-17 | $7700.00 | Window Closed / Lapsed |