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US4338377A
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Sulfonato-organosilanol compounds and aqueous solutions thereof
Assignee: 3M Co
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Filing: 1980-08-18
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Granted: 1982-07-06
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Expires: 2000-08-18
Abstract
Abstract Sulfonato-organosilanol compounds and aqueous solutions and compositions thereof are provided which have at least one sulfonato-organic substituent therein. The weight percentage of oxygen in the compounds is at least about 30% and the weight percentage of silicon in the compounds is not greater than about 15%, these percentages being taken with reference to the water-free acid form of the compounds. Hydrophilic siliceous surfaces and processes for imparting hydrophilicity to such surfaces are also provided.
Inventors
- 👤 Boyd R. Beck
- 👤 Frank T. Sher
- 👤 George V. D. Tiers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:28
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/28; C03C17/30; C04; C04B; C04B41/00; C04B41/45; C04B41/46; C04B41/49; C04B41/4905; C04B41/4922; C04B41/4938; C04B41/4944; C04B41/495; C04B41/4961; C04B41/4966; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0836; C09; C09C; C09C1/00; C09C1/28; C09C1/30; C09C1/3081; C01; C01P; C01P2004/00; C01P2004/80; C01P2006/00; C01P2006/90; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31652; Y10T428/31663; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
105 words
An article having a durable hydrophilic surface thereon, said article comprising (a) a substrate having a siliceous surface and (b) a reversibly hydrophilic layer thereon, said layer comprising a sulfonato-organosilicon compound bound to said substrate, said compound having at least one sulfonato organic substituent therein wherein said sulfonato-organosilicon compound is a sulfonato-organosilanol compound having at least one sulfonato-organic substituent wherein the weight percentage of oxygen in said silanol compound is at least about 30%, and the weight percentage of silicon in said silanol compound is not greater than about 15%, said percentages being taken with reference to the water-free acid form of said silanol compound.
Claim 2
Dependent Claim
105 words
An article having a durable hydrophilic surface thereon, said article comprising (a) a substrate having a siliceous surface and (b) a reversibly hydrophilic layer thereon, said layer comprising a sulfonato-organosilicon compound bound to said substrate, said compound having at least one sulfonato organic substituent therein wherein said sulfonato-organosilicon compound is a sulfonato-organosilanol compound having at least one sulfonato-organic substituent wherein the weight percentage of oxygen in said silanol compound is at least about 30%, and the weight percentage of silicon in said silanol compound is not greater than about 15%, said percentages being taken with reference to the water-free acid form of said silanol compound.
Claim 3
Dependent Claim
14 words
An article in accordance with claim 1 wherein said hydrophilic layer is optically transparent.
Claim 4
Dependent Claim
32 words
An article in accordance with claim 1 wherein said hydrophilic layer binds at least 50% by weight more methylene blue dye expressed as the chloride than does the respective normal siliceous surface.
Claim 5
Dependent Claim
54 words
An article in accordance with claim 1 wherein said sulfonato-organosilicon compound has the formula ##STR17## wherein Q is selected from hydroxyl, alkyl groups containing from 1 to about 4 carbon atoms and alkoxy groups containing from about 1 to 4 carbon atoms; X is an organic linking group; and n is 1 or 2.
Claim 6
Dependent Claim
17 words
An article in accordance with claim 1 wherein said layer is less than about 100 nanometers thick.
Claim 7
Dependent Claim
26 words
An article in accordance with claim 1 wherein said hydrophilic layer has a Spreading Water Drop Test area of at least about 10 mm 2 .
Claim 8
Dependent Claim
178 words
An article in accordance with claim 1 wherein said sulfonato-organosilanol compound has the formula ##STR18## wherein Q is selected from hydroxyl, alkyl groups containing from 1 to about 4 carbon atoms and alkoxy groups containing from 1 to about 4 carbon atoms; M is selected from hydrogen, alkali metals and organic cations of strong organic bases having a number average molecular weight of less than about 150 and a pK a of greater than about 11; X is a organic linking group; Y is selected from hydrogen, alkaline earth metals, cations or protonated weak bases having an average molecular weight of less than about 200 and a pK a of less than about 11, alkali metals and organic cations of strong organic bases having an average molecular weight of less than about 150 and a pK a of greater than about 11, provided that M is hydrogen when Y is selected from hydrogen, alkaline earth metals and organic cations of said protonated weak base; r is equal to the valence of Y; and n is 1 or 2.
References Cited (Backward Citations)
US3187033A
Cited
US3337351A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1985-07-05 | 1986-01-04 | 1986-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-05 | 1990-01-04 | 1990-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-05 | 1994-01-04 | 1994-07-06 | $7700.00 | Window Closed / Lapsed |