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US4782095A
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Water-in-volatile silicone emulsifier concentrates
Assignee: Witco Corp
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Filing: 1986-01-21
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Granted: 1988-11-01
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Expires: 2006-01-21
Abstract
Abstract Water-in-volatile silicone emulsifier concentrates containing 2 to 30 wt. % water in the internal phase, 40 to 90 wt. % of a volatile cyclic silicone liquid such as the octamethylsiloxane cyclic tetramer, decamethylsiloxane cyclic pentamer or the dodecamethylsiloxane cyclic hexamer and 5 to 40 wt. % of a polyoxyalkylene substituted silicone containing per molecule 5 to 100 dialkylsiloxy units, two trialkylsiloxy end blocking units and 1 to 16 polyoxyalkylene substituted alkylsiloxy units of the average formula: ##STR1## in which R is an alkyl group having 1 to 4 carbon atoms and R can individually be the same or different, wherein R° is a terminal group selected from the class consisting of hydrogen, alkyl, aryl, aralkyl and acyl radicals, n is an integer of 2 to 8, a is a number of 5 to 20 and b is 2 or 3. Said emulsifier concentrates are highly useful in preparing water-in-silicone personal-care emulsions by simply mixing same with desired personal-care components soluble therein followed by mixing with water in which water soluble personal-care components may be mixed. The personal-care components include the well known materials such as emollients, film formers, sun screen agents, moisture barriers, anti-perspirants and the like. Processes are also described for preparing the water-in-silicone emulsifier concentrates and emulsions mentioned above.
Inventors
- 👤 Mary L. Gum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:34
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/84; A61K8/89; A61K8/891; A61K8/894; A61K8/02; A61K8/04; A61K8/06; A61K8/064; A61K8/30; A61K8/58; A61K8/585; A61Q; A61Q15/00; A61Q17/00; A61Q17/04; A61Q19/00; A61Q5/00; A61Q5/12; C; C08; C08K; C08K5/00; C08K5/54; C08K5/549
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
246 words
A water-in-silicone emulsifier concentrate providing greater than 90% light transmittance and which concentrate is used for mixing with water to form a water-in-silicone emulsion, said concentrate comprising: (a) 2 to 10 wt.% of water in an internal phase; (b) 45 to 74 wt.% of a volatile cyclic silicone liquid in an external phase, said cyclic silicone liquid having a normal boiling point of less than 250° C. and having the formula: [R.sub.2 Sio].sub.x wherein R is alkyl having 1 to 4 carbon atoms and R can individually be the same or different and x is an integer of 4 to 6; and (c) 16 to 40 wt.% of a polyoxyalkylene substituted and silicone having the average formula: MD y D° z M wherein M is a trialkylsiloxy unit having the formula R 3 Sio 0 .5, D is a dialkylsiloxy unit of the formula R 2 SiO, D° is a polyoxyalkylene substituted alkylsiloxy unit of the average formula: ##STR7## R is an alkyl group having 1 to 4 carbon atoms, R° is a terminal groups selected from the group consisting of alkyl, aryl, aralkyl and acyl radicals, n is an integer of 2 to 8, a is a number of 5 to 12, b is 2, y is a number of 10 to 100, z is a number of 1 to 16, said percentages being based on the total weight of (a), (b) and (c) wherein the polyoxyalkylene chain has a molecular weight less than 1000.
Claim 2
Dependent Claim
246 words
A water-in-silicone emulsifier concentrate providing greater than 90% light transmittance and which concentrate is used for mixing with water to form a water-in-silicone emulsion, said concentrate comprising: (a) 2 to 10 wt.% of water in an internal phase; (b) 45 to 74 wt.% of a volatile cyclic silicone liquid in an external phase, said cyclic silicone liquid having a normal boiling point of less than 250° C. and having the formula: [R.sub.2 Sio].sub.x wherein R is alkyl having 1 to 4 carbon atoms and R can individually be the same or different and x is an integer of 4 to 6; and (c) 16 to 40 wt.% of a polyoxyalkylene substituted and silicone having the average formula: MD y D° z M wherein M is a trialkylsiloxy unit having the formula R 3 Sio 0 .5, D is a dialkylsiloxy unit of the formula R 2 SiO, D° is a polyoxyalkylene substituted alkylsiloxy unit of the average formula: ##STR7## R is an alkyl group having 1 to 4 carbon atoms, R° is a terminal groups selected from the group consisting of alkyl, aryl, aralkyl and acyl radicals, n is an integer of 2 to 8, a is a number of 5 to 12, b is 2, y is a number of 10 to 100, z is a number of 1 to 16, said percentages being based on the total weight of (a), (b) and (c) wherein the polyoxyalkylene chain has a molecular weight less than 1000.
Claim 3
Dependent Claim
69 words
Water-in-silicone emulsifier concentrate as claimed in claim 1 wherein the polyoxyalkylene chain, (OC b H 2b ) a , of said polyoxyalkylene substituted silicone contains an average of at least 50 wt. % polyoxyethylene units, the amount of water is 2 to 10 wt. %, the amount of cyclic silicone is 50 to 74 wt. % and the amount of polyoxyalkylene substituted silicone is 16 to 30 wt. %.
Claim 4
Dependent Claim
43 words
Water-in-silicone emulsifier concentrate as claimed in claim 2 wherein the amount of water is 2 to 10 wt. %, the amount of cyclic silicone is 60 to 74 wt. % and the amount of polyoxyalkylene substituted silicone is 16 to 28 wt. %.
Claim 5
Dependent Claim
37 words
Water-in-silicone emulsifier concentrate as claimed in claim 2 wherein said cyclic silicone liquid is octamethyltetrasiloxane and said polyoxyalkylene substituted silicone has the average formula: ##STR8## wherein y, z, b and a are as defined in claim 1.
Claim 6
Dependent Claim
18 words
Water-in-silicone emulsifier concentrate as claimed in claim 4 wherein said polyoxyalkylene substituted silicone has the average formula: ##STR9##
Claim 7
Dependent Claim
31 words
Water-in-silicone emulsifier concentrate as claimed in claim 5 containing about 10 wt. % water, about 74 wt. % dimethylsiloxane cyclic tetramer and about 16 wt. % of said polyoxyalkylene substituted silicone.
Claim 8
Dependent Claim
37 words
Water-in-silicone emulsifier concentrate as claimed in claim 2 wherein said cyclic silicone liquid is decamethylpentasiloxane and said polyoxyalkylene substituted silicone has the average formula: ##STR10## wherein y, z, b and a are as defined in claim 1.
Claim 9
Dependent Claim
43 words
Water-in-silicone emulsifier concentrate as claimed in claim 7 wherein said polyoxyalkylene substituted silicone has the average formula: ##STR11## and concentrate containing about 10 wt. % water, about 74 wt. % dimethylsiloxane cyclic pentamer and about 16 wt. % of said polyoxyalkylene substituted silicone.
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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) | 1991-11-01 | 1992-05-02 | 1992-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-01 | 1996-05-02 | 1996-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-01 | 2000-05-02 | 2000-11-01 | $7700.00 | Window Closed / Lapsed |