US5021405A
Expired / Lapsed
US
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Emollient durability enhancing siloxanes
Assignee: Dow Silicones Corp
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Filing: 1990-03-05
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Granted: 1991-06-04
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Expires: 2010-03-05
Abstract
Abstract A method of enhancing the durability of an emollient material on a substrate by forming a mixture of an emollient material and an effective amount of an organosilicon compound, and applying the mixture to the substrate to be treated. The organosilicon compound is either an aminofunctional, amidofunctional, or carboxyfunctional, polysiloxane. A skin conditioning composition of enhanced durability is also disclosed which is a mixture of an emollient material and an effective amount of an organosilicon compound which is either an aminofunctional, amidofunctional, or carboxy functional, polysiloxane.
Inventors
- 👤 Helen M. Klimisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:45
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/84; A61K8/89; A61K8/896; A61K8/898; A61Q; A61Q19/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
202 words
A method of enhancing the durability of an emollient material on human skin comprising applying to human skin a mixture of an emollient material and an effective amount of an organosilicon compound, the organosilicon compound being an amidofunctional siloxane having an average of 50 to 1000 siloxane units per molecule with an average of 1 to 50 of the siloxane units per molecule being amide-containing siloxane units bearing a substituent of the formula ##STR8## wherein n is 0 or 1, R' denotes an alkylene radical of 3 to 6 carbon atoms, and R'' denotes a hydrogen radical or an alkyl radical of 1 to 6 carbon atoms, X denotes an acyl radical of the formula ##STR9## X' denotes a hydrogen radical or X, and R''' denotes an alkyl radical of 1 to 4 carbon atoms and substantially all other organic substituents in the polysiloxane being methyl groups, the emollient material being selected from the group consisting of (i) straight, branched, and cyclic hydroxy compounds containing 1 to 30 carbon atoms, (ii) straight, branched, and cyclic carboxylic acids containing 1 to 31 carbon atoms, (iii) alkanes of the formula H--(CH 2 ) n --H wherein n is 5 to 30, and (iv) siloxanes.
Claim 2
Independent Claim
202 words
A method of enhancing the durability of an emollient material on human skin comprising applying to human skin a mixture of an emollient material and an effective amount of an organosilicon compound, the organosilicon compound being an amidofunctional siloxane having an average of 50 to 1000 siloxane units per molecule with an average of 1 to 50 of the siloxane units per molecule being amide-containing siloxane units bearing a substituent of the formula ##STR8## wherein n is 0 or 1, R' denotes an alkylene radical of 3 to 6 carbon atoms, and R'' denotes a hydrogen radical or an alkyl radical of 1 to 6 carbon atoms, X denotes an acyl radical of the formula ##STR9## X' denotes a hydrogen radical or X, and R''' denotes an alkyl radical of 1 to 4 carbon atoms and substantially all other organic substituents in the polysiloxane being methyl groups, the emollient material being selected from the group consisting of (i) straight, branched, and cyclic hydroxy compounds containing 1 to 30 carbon atoms, (ii) straight, branched, and cyclic carboxylic acids containing 1 to 31 carbon atoms, (iii) alkanes of the formula H--(CH 2 ) n --H wherein n is 5 to 30, and (iv) siloxanes.
Claim 3
Dependent Claim
65 words
The method of claim 1 in which the amidofunctional polysiloxane is a compound having the formula Me 3 SiO(Me 2 SiO) x (MeRSiO) y SiMe 3 in which Me is methyl; R is the functional group --(C 4 H 8 )NH(CH 2 ) 2 NHCOCH 3 ; x is an integer from fifty to one thousand; and y is an integer from one to fifty.
Claim 4
Dependent Claim
24 words
The method of claim 2 in which the emollient and the polysiloxane are present in the mixture in the ratio of four to one.
Claim 5
Dependent Claim
24 words
The method of claim 2 in which the emollient and the polysiloxane are present in the mixture in the ratio of two to one.
Claim 6
Dependent Claim
21 words
The method of claim 3 in which the mixture of the emollient and the polysiloxane includes a volatile cyclic siloxane solvent.
Claim 7
Dependent Claim
17 words
The method of claim 5 in which the volatile cyclic siloxane is a low viscosity polydimethylcyclosiloxane fluid.
Claim 8
Dependent Claim
31 words
The method of claim 6 in which the polydimethylcyclosiloxane fluid is a mixture of cyclic tetramers and pentamers and has a viscosity of about 2.5 centistokes measured at twenty-five degrees Centigrade.
Claim 9
Dependent Claim
29 words
The method of claim 7 in which the mixture contains about five to ten percent by weight of the emollient and the polysiloxane in the volatile cyclic siloxane solvent.
Claim 10
Dependent Claim
26 words
The method of claim 1 in which the emollient is a material selected from the group consisting of mineral oil, mink oil, lanolin oil, and petrolatum.
Claim 11
Dependent Claim
191 words
A skin conditioning composition of enhanced durability comprising a mixture of an emollient and an effective amount of an organosilicon compound, the organosilicon compound being an amidofunctional polysiloxane having an average of 50 to 1000 siloxane units per molecule with an average of 1 to 50 of the siloxane units per molecule being amide-containing siloxane units bearing a substituent of the formula ##STR10## wherein n is 0 or 1, R' denotes an alkylene radical of 3 to 6 carbon atoms, and R'' denotes a hydrogen radical or an alkyl radical of 1 to 6 carbon atoms, X denotes an acyl radical of the formula ##STR11## X' denotes a hydrogen radical or X, and R''' denotes an alkyl radical of 1 to 4 carbon atoms and substantially all other organic substituents in the polysiloxane being methyl groups, the emollient material being selected from the group consisting of (i) straight, branched, and cyclic hydroxy compounds containing 1 to 30 carbon atoms, (ii) straight, branched, and cyclic carboxylic acids containing 1 to 31 carbon atoms, (iii) alkanes of the formula H--(CH 2 ) n --H wherein n is 5 to 30, and (iv) siloxanes.
Claim 12
Dependent Claim
191 words
A skin conditioning composition of enhanced durability comprising a mixture of an emollient and an effective amount of an organosilicon compound, the organosilicon compound being an amidofunctional polysiloxane having an average of 50 to 1000 siloxane units per molecule with an average of 1 to 50 of the siloxane units per molecule being amide-containing siloxane units bearing a substituent of the formula ##STR10## wherein n is 0 or 1, R' denotes an alkylene radical of 3 to 6 carbon atoms, and R'' denotes a hydrogen radical or an alkyl radical of 1 to 6 carbon atoms, X denotes an acyl radical of the formula ##STR11## X' denotes a hydrogen radical or X, and R''' denotes an alkyl radical of 1 to 4 carbon atoms and substantially all other organic substituents in the polysiloxane being methyl groups, the emollient material being selected from the group consisting of (i) straight, branched, and cyclic hydroxy compounds containing 1 to 30 carbon atoms, (ii) straight, branched, and cyclic carboxylic acids containing 1 to 31 carbon atoms, (iii) alkanes of the formula H--(CH 2 ) n --H wherein n is 5 to 30, and (iv) siloxanes.
Claim 13
Dependent Claim
63 words
The composition of claim 10 in which the amidofunctional polysiloxane is a compound having the formula Me 3 SiO(Me 2 SiO) x (MeRSiO) y SiMe 3 in which Me is methyl; R is the functional group --(C 4 H 8 )NH(CH 2 ) 2 ; x is an integer from fifty to one thousand; and y is an integer from one to fifty.
Claim 14
Dependent Claim
24 words
The composition of claim 11 in which the emollient and the polysiloxane are present in the mixture in the ratio of four to one.
Claim 15
Dependent Claim
24 words
The composition of claim 11 in which the emollient and the polysiloxane are present in the mixture in the ratio of two to one.
Claim 16
Dependent Claim
21 words
The composition of claim 12 in which the mixture of the emollient and the polysiloxane includes a volatile cyclic siloxane solvent.
Claim 17
Dependent Claim
17 words
The composition of claim 14 in which the volatile cyclic siloxane is a low viscosity polydimethylcyclosiloxane fluid.
Claim 18
Dependent Claim
31 words
The composition of claim 15 in which the polydimethylcyclosiloxane fluid is a mixture of cyclic tetramers and pentamers and has a viscosity of about 2.5 centistokes measured at twenty-five degrees Centigrade.
Claim 19
Dependent Claim
29 words
The composition of claim 16 in which the mixture contains about five to ten percent by weight of the emollient and the polysiloxane in the volatile cyclic siloxane solvent.
Claim 20
Dependent Claim
26 words
The composition of claim 10 in which the emollient is a material selected from the group consisting of mineral oil, mink oil, lanolin oil, and petrolatum.
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
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| 3.5 Years (Year 4) | 1994-06-03 | 1994-12-03 | 1995-06-04 | $2000.00 | Window Closed / Lapsed |
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