Patent JPS61243518A successfully refreshed from Google Patents.
US5328683A
Expired / Lapsed
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Water repellent and method of preparation
Assignee: DuPont Toray Specialty Materials KK
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Filing: 1993-07-06
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Granted: 1994-07-12
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Expires: 2013-07-06
Abstract
Abstract A water repellent powdered material and a method of making the powder in which the powdered material is mixed with an organic solvent solution of a triorganosiloxysilicic acid having the formula (R3SiO1/2)2nSiO2 in which R is a monovalent hydrocarbon radical such as alkyl, aryl, and alkenyl; and n is an integer having a value of one to five; with the acid being present in an amount of from 0.1 to 20 parts by weight per one hundred parts by weight of the powdered material. The powder can be used to formulate cosmetic foundations.
Inventors
- 👤 Asao Harashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:19
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/02; A61K8/0241; A61K8/18; A61K8/30; A61K8/58; A61K8/585; A61Q; A61Q1/00; A61Q1/02; A61Q1/12; B; B82; B82Y; B82Y30/00; C; C09; C09C; C09C1/00; C09C1/36; C09C1/3607; C09C1/3684; C09C3/00; C09C3/12; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412; A61K2800/60; A61K2800/61; A61K2800/62; A61K2800/621; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2004/62; C01P2004/64; C01P2004/80; C01P2004/82; C01P2004/84; C01P2006/00; C01P2006/20; C01P2006/90
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
130 words
A cosmetic foundation comprising a wax, a liquid paraffin, a dimethylpolysiloxane, and a water repellent powder made by (i) mixing a powdered material with an organic solvent solution of a triorganosiloxy silicic acid having the formula (R 3 SiO 178 ) 2 nSiO 2 in which R is a monovalent hydrocarbon radical selected from the group consisting of alkyl, aryl, and alkenyl; and n is an integer having a value of one to five; the triorganosiloxy silicic acid being present in an amount of from 0.1 to 20 parts by weight per one hundred parts by weight of the powdered material; the triorganosiloxy silicic acid being prepared by reacting water glass and a hexaorganodisilizane with heating in an aromatic solvent/water mixture followed by extractive drying; and (ii) removing the solvent.
Claim 2
Dependent Claim
130 words
A cosmetic foundation comprising a wax, a liquid paraffin, a dimethylpolysiloxane, and a water repellent powder made by (i) mixing a powdered material with an organic solvent solution of a triorganosiloxy silicic acid having the formula (R 3 SiO 178 ) 2 nSiO 2 in which R is a monovalent hydrocarbon radical selected from the group consisting of alkyl, aryl, and alkenyl; and n is an integer having a value of one to five; the triorganosiloxy silicic acid being present in an amount of from 0.1 to 20 parts by weight per one hundred parts by weight of the powdered material; the triorganosiloxy silicic acid being prepared by reacting water glass and a hexaorganodisilizane with heating in an aromatic solvent/water mixture followed by extractive drying; and (ii) removing the solvent.
Claim 3
Dependent Claim
24 words
A cosmetic according to claim 1 in which the powdered material has an average particle size in the range of 0.05 to 500 micrometers.
Claim 4
Dependent Claim
23 words
A cosmetic according to claim 1 in which the triorganosiloxy silicic acid has a molecular weight in the range of 500 to 10,000.
Claim 5
Dependent Claim
29 words
A cosmetic according to claim 3 in which the triorganosiloxy silicic acid (R 3 SiO 1/2 ) units and SiO 2 units in a ratio of 1.0 to 1.1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-07-11 | 1998-01-10 | 1998-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-11 | 2002-01-10 | 2002-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-11 | 2006-01-10 | 2006-07-12 | $7700.00 | Window Closed / Lapsed |