US4474912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable water-in-oil emulsions containing polyoxyalkylene block copolymers
Assignee: BASF Corp
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Filing: 1983-08-29
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Granted: 1984-10-02
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Expires: 2003-08-29
Abstract
Abstract The instant invention relates to water-in-oil emulsions which are non-irritating to the skin, low in toxicity, colorless and easy to wash off, which contain as the emulsifying agent a polyoxyalkylene compound of the formula: Y(A).sub.m --(B).sub.n H wherein Y is the residue formed by the removal of one atom of active hydrogen from a suitable initiator, A is a hydrophobic, heteric mixture of an oxytetramethylene radical, derived from tetramethylene oxide and a vicinal alkylene oxide radical derived from propylene oxide; B is primarily C 2 H 4 O; m is an integer such that the total molecular weight of the hydrophobe is about 500 to 2000 and n is an integer such that B is about 20 to 50 percent of the total weight of the compound.
Inventors
- 👤 Ahmet C. Ozmeral
- 👤 Irving R. Schmolka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:29
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/90; A01; A01N; A01N25/00; A01N25/02; A01N25/04; A61K47/00; A61K47/06; A61K47/08; A61K47/10; A61K8/02; A61K8/04; A61K8/06; A61K8/064; A61K9/00; A61K9/0012; A61K9/0014; A61K9/10; A61K9/107; A61Q; A61Q19/00; C; C09; C09K; C09K23/00; C09K23/42
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
133 words
A water-in-oil emulsion comprising water, mineral oil, and an emulsifying amount of a polyoxyalkylene compound having the formula Y(A).sub.m --(B).sub.n H wherein Y is the residue formed by the removal of one atom of active hydrogen from a monofunctional initiator, A is a hydrophobic, heteric mixture of an oxytetramethylene radical, derived from tetramethylene oxide and a vicinal alkylene oxide radical derived from propylene oxide, said A being derived from the reaction of said oxides in the molar ratio of tetramethylene oxide:vicinal alkylene oxide of 3:1 to 1:3; B is C 2 H 4 O; n is an integer such that B is about 30 to 50 percent of the total weight of the compound and m is an integer such that the total molecular weight of the hydrophobe is about 500 to 2000.
Claim 2
Dependent Claim
133 words
A water-in-oil emulsion comprising water, mineral oil, and an emulsifying amount of a polyoxyalkylene compound having the formula Y(A).sub.m --(B).sub.n H wherein Y is the residue formed by the removal of one atom of active hydrogen from a monofunctional initiator, A is a hydrophobic, heteric mixture of an oxytetramethylene radical, derived from tetramethylene oxide and a vicinal alkylene oxide radical derived from propylene oxide, said A being derived from the reaction of said oxides in the molar ratio of tetramethylene oxide:vicinal alkylene oxide of 3:1 to 1:3; B is C 2 H 4 O; n is an integer such that B is about 30 to 50 percent of the total weight of the compound and m is an integer such that the total molecular weight of the hydrophobe is about 500 to 2000.
Claim 3
Dependent Claim
26 words
The water-in-oil emulsion of claim 1 wherein the value of m is such that the total molecular weight of the hydrophobe is about 750 to 1500.
Claim 4
Dependent Claim
40 words
The water-in-oil emulsion of claim 1 wherein the ratio of water to oil is from about 15:85 to 45:55 and the amount of said emulsifier is from about 1 to 15 percent of the total weight of the emulsion composition.
Claim 5
Dependent Claim
28 words
The oil-in-water emulsion of claim 3 including at least one primary treatment agent in amount of about 1 to 10 percent of the total weight of the composition.
Claim 6
Dependent Claim
26 words
The water-in-oil emulsion of claim 4 including at least one adjuvant in amount of about 1 to 25 percent of the total weight of the composition.
Claim 7
Dependent Claim
61 words
The water-in-oil emulsion of claim 5 wherein the primary treatment agent is selected from the group consisting of: deodorants, antiperspirants, astringents, antiseptics, pesticides, materials for treating planters warts and athelete's foot, antipsoriasis drugs and vitamins and the adjuvant is selected from the group consisting of: proteins, amino acids, electrolytes, humectants, silicone oils, skin fresheners, dipelargonate ethers and esters, dyes and perfumes.
Claim 8
Independent Claim
144 words
A method of producing stable water-in-mineral oil emulsions comprising adding thereto an emulsifying amount of a polyoxyalkylene compound having the formula Y(A).sub.m --(B).sub.n H wherein Y is the residue formed by the removal of one atom of active hydrogen from a monofunctional initiator, A is a hydrophobic, heteric mixture of an oxytetramethylene radical, derived from tetramethylene oxide and vicinal alkylene oxide radical derived from propylene oxide, said A being derived from the reaction of said oxides in the molar ratio of tetramethylene oxide:vicinal alkylene oxide of 3:1 to 1:3; B is C 2 H 4 O; n is an integer such that the total weight of said B is about 30 to 50 percent by weight of the total oxyalkylene residue weight of the compound and m is an integer such that the total molecular weight of the hydrophobe is about 500 to 2000.
Claim 9
Independent Claim
144 words
A method of producing stable water-in-mineral oil emulsions comprising adding thereto an emulsifying amount of a polyoxyalkylene compound having the formula Y(A).sub.m --(B).sub.n H wherein Y is the residue formed by the removal of one atom of active hydrogen from a monofunctional initiator, A is a hydrophobic, heteric mixture of an oxytetramethylene radical, derived from tetramethylene oxide and vicinal alkylene oxide radical derived from propylene oxide, said A being derived from the reaction of said oxides in the molar ratio of tetramethylene oxide:vicinal alkylene oxide of 3:1 to 1:3; B is C 2 H 4 O; n is an integer such that the total weight of said B is about 30 to 50 percent by weight of the total oxyalkylene residue weight of the compound and m is an integer such that the total molecular weight of the hydrophobe is about 500 to 2000.
Claim 10
Dependent Claim
25 words
The method of claim 7 wherein the value of m is such that the total molecular weight of the hydrophobe is about 750 to 1500.
Claim 11
Dependent Claim
37 words
The method of claim 7 wherein the ratio of water to oil is from 15:85 to 45:55 and the amount of said emulsifier is from about 1 to 15 percent of the total weight of the composition.
Claim 12
Dependent Claim
30 words
The method of claim 9 wherein said emulsion includes at least one primary treatment agent in amount of about 1 to 10 percent of the total weight of the composition.
Claim 13
Dependent Claim
28 words
The method of claim 10 wherein said emulsion includes at least one adjuvant in amount of about 1 to 25 percent of the total weight of the composition.
Claim 14
Dependent Claim
60 words
The method of claim 11 wherein the primary treatment agent is selected from the group consisting of: deodorants, antiperspirants, astringents, antiseptics, pesticides, materials for treating planters warts and athlete's foot, antipsoriasis drugs and vitamins and the adjuvant is selected from the group consisting of: proteins, amino acids, electrolytes, humectants, silicone oils, skin fresheners, dipelargonate ethers and esters, dyes and perfumes.
References Cited (Backward Citations)
US2828345A
Cited
US3062721A
Cited
US3846546A
Cited
US3776857A
Cited
US4115314A
Cited
US4022736A
Cited
US4183821A
Cited
US4384974A
Cited
US4357353A
Cited
US4370319A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-02 | 1988-04-02 | 1988-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-02 | 1992-04-02 | 1992-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-02 | 1996-04-02 | 1996-10-02 | $7700.00 | Window Closed / Lapsed |