US5280019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Skin treatment with carboxyfunctional siloxanes
Assignee: Dow Silicones Corp
•
Filing: 1991-04-11
•
Granted: 1994-01-18
•
Expires: 2011-04-11
Abstract
Abstract A method of treating human skin to enhance the ability of skin in the absorption and retention of moisture in order to retard skin moisture loss. There is applied to skin an organosilicon compound exhibiting humectant-like characteristics which is a carboxylic acid salt functional polysiloxane. An alternate method treats human skin to reduce the transepidermal water loss of skin in order to enhance skin softness. There is applied to skin an occlusive film forming organosilicon compound which is a carboxyfunctional polysiloxane or its metal carboxylate salt.
Inventors
- 👤 Helen M. Klimisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:14
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/84; A61K8/89; A61K8/891; A61K8/893; A61Q; A61Q19/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
102 words
A method of treating human skin comprising applying to skin an organosilicon compound exhibiting humectant-like characteristics, the organosilicon compound being a carboxylic acid salt functional polysiloxane having the formula QMe.sub.2 SiO(Me.sub.2 SiO).sub.x (MeRSiO).sub.y SiMe.sub.2 Q in which Me is methyl; Q is R, Me or OH; x has a value of 1-1000; y has a value of 1-100; R is a carboxylic acid salt group having the formula --R'COOM in which R' is a divalent organic group having from 2-10 carbon atoms; and M is a cation selected from the group consisting of Na + , K + and Li + .
Claim 2
Independent Claim
102 words
A method of treating human skin comprising applying to skin an organosilicon compound exhibiting humectant-like characteristics, the organosilicon compound being a carboxylic acid salt functional polysiloxane having the formula QMe.sub.2 SiO(Me.sub.2 SiO).sub.x (MeRSiO).sub.y SiMe.sub.2 Q in which Me is methyl; Q is R, Me or OH; x has a value of 1-1000; y has a value of 1-100; R is a carboxylic acid salt group having the formula --R'COOM in which R' is a divalent organic group having from 2-10 carbon atoms; and M is a cation selected from the group consisting of Na + , K + and Li + .
Claim 3
Dependent Claim
22 words
The method of claim 1 in which R' is selected from the group consisting of alkylene, alkylenearylene and sulfur containing alkylene groups.
Claim 4
Dependent Claim
75 words
The method of claim 2 in which R' is --CH 2 CH 2-- , --CH 2 CH 2 CH 2 --, --CH 2 CH 2 CH 2 CH 2 --, --CH 2 CH(CH 3 )CH 2 --, --(CH 2 ) 2 C 6 H 4 --, --CH 2 CH 2 S--, --CH 2 CH 2 SCH 2 --, --CH 2 CH 2 CH 2 SCH 2 --, or --CH 2 CH(CH 3 )CH 2 S--.
Claim 5
Dependent Claim
16 words
The method of claim 3 in which R' is --CH 2 CH 2 SCH 2 --.
Claim 6
Dependent Claim
12 words
The method of claim 4 in which M is Na + .
Claim 7
Dependent Claim
12 words
The method of claim 4 in which M is K + .
Claim 8
Independent Claim
159 words
A method of treating human skin comprising applying to skin an occlusive film forming organosilicon compound, the organosilicon compound being selected from the group consisting of a carboxyfunctional polysiloxane having the formula QMe.sub.2 SiO(Me.sub.2 SiO).sub.x (MeRSiO).sub.y SiMe.sub.2 Q wherein Me is methyl; Q is R, Me or OH; x has a value of 1-1000; y has a value of 1-100; R is a carboxyfunctional substituent selected from the group consisting of carboxyalkyl radicals and carboxythioalkyl radicals; and a carboxylic acid salt functional polysiloxane having the formula QMe.sub.2 SiO(Me.sub.2 SiO).sub.x (MeRSiO).sub.y SiMe.sub.2 Q in which Me is methyl; Q is R, Me or OH; x has a value of 1-1000; y has a value of 1-100; R is a carboxylic acid salt group having the formula --R'COOM in which R' is a divalent organic group having from 2-10 carbon atoms; and M is a cation selected from the group consisting of Na + , K + and Li + .
Claim 9
Independent Claim
159 words
A method of treating human skin comprising applying to skin an occlusive film forming organosilicon compound, the organosilicon compound being selected from the group consisting of a carboxyfunctional polysiloxane having the formula QMe.sub.2 SiO(Me.sub.2 SiO).sub.x (MeRSiO).sub.y SiMe.sub.2 Q wherein Me is methyl; Q is R, Me or OH; x has a value of 1-1000; y has a value of 1-100; R is a carboxyfunctional substituent selected from the group consisting of carboxyalkyl radicals and carboxythioalkyl radicals; and a carboxylic acid salt functional polysiloxane having the formula QMe.sub.2 SiO(Me.sub.2 SiO).sub.x (MeRSiO).sub.y SiMe.sub.2 Q in which Me is methyl; Q is R, Me or OH; x has a value of 1-1000; y has a value of 1-100; R is a carboxylic acid salt group having the formula --R'COOM in which R' is a divalent organic group having from 2-10 carbon atoms; and M is a cation selected from the group consisting of Na + , K + and Li + .
Claim 10
Dependent Claim
21 words
The method of claim 7 wherein the occlusive film forming organosilicon compound is applied to the skin as a formulated product.
Claim 11
Dependent Claim
21 words
The method of claim 7 wherein the occlusive film forming organosilicon compound is applied to the skin as a formulated product.
Claim 12
Dependent Claim
13 words
The method of claim 7 wherein R is --CH(CH 3 ) 2 COOH.
Claim 13
Dependent Claim
20 words
The method of claim 7 wherein x is less than about three hundred and y is less than about ten.
Claim 14
Dependent Claim
22 words
The method of claim 7 wherein the average reduction in the rate of transepidermal water loss is at least about twenty percent.
Claim 15
Dependent Claim
22 words
The method of claim 7 in which R' is selected from the group consisting of alkylene, alkylenearylene and sulfur containing alkylene groups.
Claim 16
Dependent Claim
75 words
The method of claim 13 in which R' is --CH 2 CH 2 --, --CH 2 CH 2 CH 2 --, --CH 2 CH 2 CH 2 CH 2 --, --CH 2 CH(CH 3 )CH 2 --, --(CH 2 ) 2 C 6 H 4 --, --CH 2 CH 2 S--, --CH 2 CH 2 SCH 2 --, --CH 2 CH 2 CH 2 SCH 2 --, or --CH 2 CH(CH 3 )CH 2 S--.
Claim 17
Dependent Claim
16 words
The method of claim 14 in which R' is --CH 2 CH 2 SCH 2 --.
Claim 18
Dependent Claim
12 words
The method of claim 15 in which M is Na + .
Claim 19
Dependent Claim
12 words
The method of claim 15 in which M is K + .
References Cited (Backward Citations)
US3818105A
Cited
US3852075A
Cited
US4246285A
Cited
US4113677A
Cited
US4271215A
Cited
US4563347A
Cited
US4477514A
Cited
US4559227A
Cited
US4810253A
Cited
US4848981A
Cited
US4749732A
Cited
US4857212A
Cited
US4844888A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-01-17 | 1997-07-19 | 1998-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-17 | 2001-07-19 | 2002-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-17 | 2005-07-19 | 2006-01-18 | $7700.00 | Window Closed / Lapsed |