US5707613A
Expired / Lapsed
US
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Spontaneously formed clear silicone microemulsions
Assignee: Dow Silicones Corp
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Filing: 1996-08-09
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Granted: 1998-01-13
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Expires: 2016-08-09
Abstract
Abstract A method of spontaneously forming a highly stable clear microemulsion by combining (i) water; (ii) a volatile cyclic methyl siloxane or volatile linear methyl siloxane; and (iii) a silicone polyether surfactant. The amounts of each component are such that the composition is in the form of a microemulsion. The volatile methyl siloxane is present in the microemulsion in the form of particles having an average diameter of less than about 100 nanometers. The microemulsion is useful in personal care products.
Inventors
- 👤 Randal Myron Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:47
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/02; A; A61; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/84; A61K8/89; A61K8/891; A61K8/894; A61K8/02; A61K8/04; A61K8/06; A61K8/068; A61K8/30; A61K8/58; A61K8/585; A61Q; A61Q15/00; A61Q19/00; A61Q5/00; B82; B82Y; B82Y5/00; C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/14; C08; C08J; C08J3/00; C08J3/02; C08J3/03; A61K2800/00; A61K2800/20; A61K2800/26; A61K2800/262; A61K2800/40; A61K2800/41; A61K2800/413; A61Q5/12; C08J2383/00; C08J2383/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
145 words
A method of treating hair or skin comprising applying to hair or skin a microemulsion formed by combining (i) water; (ii) a cyclic methyl siloxane of the formula {(CH 3 ) 2 SiO} p or a linear methyl siloxane of the formula (CH 3 ) 3 SiO{(CH 3 ) 2 SiO} q Si(CH 3 ) 3 where p is 3-6 and q is 0-5; and (iii) a silicone polyether with a formula selected from the group consisting of ##STR8## where R1 is an alkyl group containing 1-6 carbon atoms; R2 is the radical --(CH 2 ) a O(C 2 H 4 O) b (C 3 H 6 O) c R3; x is 0-3; y is 1-3; z is 0-2; m is 3-5; n is one; a is 3-6; b is 4-20; c is 0-5; and R3 is hydrogen, a methyl radical, or an acyl radical.
Claim 2
Independent Claim
145 words
A method of treating hair or skin comprising applying to hair or skin a microemulsion formed by combining (i) water; (ii) a cyclic methyl siloxane of the formula {(CH 3 ) 2 SiO} p or a linear methyl siloxane of the formula (CH 3 ) 3 SiO{(CH 3 ) 2 SiO} q Si(CH 3 ) 3 where p is 3-6 and q is 0-5; and (iii) a silicone polyether with a formula selected from the group consisting of ##STR8## where R1 is an alkyl group containing 1-6 carbon atoms; R2 is the radical --(CH 2 ) a O(C 2 H 4 O) b (C 3 H 6 O) c R3; x is 0-3; y is 1-3; z is 0-2; m is 3-5; n is one; a is 3-6; b is 4-20; c is 0-5; and R3 is hydrogen, a methyl radical, or an acyl radical.
Claim 3
Dependent Claim
27 words
A method according to claim 1 in which the methyl siloxane is present in the microemulsion as droplets with an average diameter of less than 100 nanometers.
Claim 4
Dependent Claim
13 words
A method according to claim 1 in which the methyl siloxane is octamethylcyclotetrasiloxane.
Claim 5
Dependent Claim
13 words
A method according to claim 1 in which the methyl siloxane is decamethylcyclopentasiloxane.
Claim 6
Independent Claim
202 words
A method of treating hair or skin comprising applying to hair or skin a microemulsion comprising (i) water; (ii) a methyl siloxane selected from the group consisting of cyclic methyl siloxanes of the formula {(CH 3 ) 2 SiO} p where p is 3-6, linear methyl siloxanes of the formula (CH 3 ) 3 SiO{(CH 3 ) 2 SiO} q Si(CH 3 ) 3 where q is 0-5, branched cyclic volatile methyl siloxanes containing difunctional units (CH 3 ) 2 SiO 2/2 and trifunctional units CH 3 SiO 3/2 , and branched linear volatile methyl siloxanes containing monofunctional units (CH 3 ) 3 SiO 1/2 , difunctional units (CH 3 ) 2 SiO 2/2 , and tetrafunctional units SiO 4/2 ; and (iii) a silicone polyether with a formula selected from the group consisting of ##STR9## where R1 is an alkyl group of 1-6 carbon atoms; R2 is the radical --(CH 2 ) a O(C 2 H 4 O) b (C 3 H 6 O) c R3; x is 0-3; y is 1-3; z is 0-2; m is 3-5; n is one; a is 3-6; b is 4-20; c is 0-5; and R3 is hydrogen, a methyl radical, or an acyl radical.
Claim 7
Independent Claim
202 words
A method of treating hair or skin comprising applying to hair or skin a microemulsion comprising (i) water; (ii) a methyl siloxane selected from the group consisting of cyclic methyl siloxanes of the formula {(CH 3 ) 2 SiO} p where p is 3-6, linear methyl siloxanes of the formula (CH 3 ) 3 SiO{(CH 3 ) 2 SiO} q Si(CH 3 ) 3 where q is 0-5, branched cyclic volatile methyl siloxanes containing difunctional units (CH 3 ) 2 SiO 2/2 and trifunctional units CH 3 SiO 3/2 , and branched linear volatile methyl siloxanes containing monofunctional units (CH 3 ) 3 SiO 1/2 , difunctional units (CH 3 ) 2 SiO 2/2 , and tetrafunctional units SiO 4/2 ; and (iii) a silicone polyether with a formula selected from the group consisting of ##STR9## where R1 is an alkyl group of 1-6 carbon atoms; R2 is the radical --(CH 2 ) a O(C 2 H 4 O) b (C 3 H 6 O) c R3; x is 0-3; y is 1-3; z is 0-2; m is 3-5; n is one; a is 3-6; b is 4-20; c is 0-5; and R3 is hydrogen, a methyl radical, or an acyl radical.
Claim 8
Dependent Claim
30 words
A method according to claim 5 in which the microemulsion contains 15-30% by weight of the silicone polyether, the proportions of methyl siloxane and water being between 40:60 to 80:20.
Claim 9
Independent Claim
148 words
A method of treating hair or skin comprising applying to hair or skin a composition containing a microemulsion formed by combining (i) water; (ii) a cyclic methyl siloxane of the formula {(CH 3 ) 2 SiO} p or a linear methyl siloxane of the formula (CH 3 ) 3 SiO{(CH 3 ) 2 SiO} q Si(CH 3 ) 3 where p is 3-6 and q is 0-5; and (iii) a silicone polyether with a formula selected from the group consisting of ##STR10## where R1 is an alkyl group of 1-6 carbon atoms; R2 is the radical --(CH 2 ) a O(C 2 H 4 O) b (C 3 H 6 O) c R3; x is 0-3; y is 1-3; z is 0-2; m is 3-5; n is one; a is 3-6; b is 6-12; c is 0-5; and R3 is hydrogen, a methyl radical, or an acyl radical.
Claim 10
Independent Claim
148 words
A method of treating hair or skin comprising applying to hair or skin a composition containing a microemulsion formed by combining (i) water; (ii) a cyclic methyl siloxane of the formula {(CH 3 ) 2 SiO} p or a linear methyl siloxane of the formula (CH 3 ) 3 SiO{(CH 3 ) 2 SiO} q Si(CH 3 ) 3 where p is 3-6 and q is 0-5; and (iii) a silicone polyether with a formula selected from the group consisting of ##STR10## where R1 is an alkyl group of 1-6 carbon atoms; R2 is the radical --(CH 2 ) a O(C 2 H 4 O) b (C 3 H 6 O) c R3; x is 0-3; y is 1-3; z is 0-2; m is 3-5; n is one; a is 3-6; b is 6-12; c is 0-5; and R3 is hydrogen, a methyl radical, or an acyl radical.
Claim 11
Dependent Claim
27 words
A method according to claim 7 in which the methyl siloxane is present in the microemulsion as droplets with an average diameter of less than 100 nanometers.
Claim 12
Dependent Claim
15 words
A method according to claim 7 in which the methyl siloxane is octamethylcyclotetrasiloxane or decamethylcyclopentasiloxane.
Claim 13
Dependent Claim
27 words
A method according to claim 7 in which the microemulsion has a composition defined by and within the shaded area depicted in the annexed sole FIG. 1.
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 2001-01-12 | 2001-07-14 | 2002-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-01-12 | 2005-07-14 | 2006-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-01-12 | 2009-07-14 | 2010-01-13 | $7700.00 | Window Closed / Lapsed |