US4433013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for imparting hydrophobicity to mineral substrates
Assignee: Dynamit Nobel AG
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Filing: 1981-06-08
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Granted: 1984-02-21
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Expires: 2001-06-08
Abstract
Abstract There is provided a process for imparting hydrophobicity to an inorganic porous mineral substrate which comprises mixing of a composition of at least one silane or condensation or hydrolysis product thereof and at least one deactivatable surfactant and optionally an organic alcohol with water or a water/organic alcohol mixture to form a dispersion of emulsion and applying the resulting dispersion or emulsion to the substrate.
Inventors
- 👤 Josef A. Puhringer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:38
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/46; C04B41/49; C04B41/4905; C04B41/4922; C04B41/495; C04B41/4961; C04B41/60; C04B41/61; C04B41/62; C04B41/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A process for imparting hydrophobicity to an inorganic porous mineral substrate comprising the steps of applying a composition comprising a dispersion or emulsion formed of a first component selected from the group consisting of a silane, a condensation product of silane, and a hydrolysis product of silane; a second component consisting of 0.01 to 1.0% by volume deactivatable surfactant; and a medium wherein these components are dispersed or emulsified, selected from the group consisting of water and a water-alcohol mixture, to the mineral substrate; and thereafter deactivating the surfactant by application thereto of liquid or gas containing a deactivating agent selected from the group consisting of alkaline, acid, reducing or oxidizing agents.
Claim 2
Dependent Claim
112 words
A process for imparting hydrophobicity to an inorganic porous mineral substrate comprising the steps of applying a composition comprising a dispersion or emulsion formed of a first component selected from the group consisting of a silane, a condensation product of silane, and a hydrolysis product of silane; a second component consisting of 0.01 to 1.0% by volume deactivatable surfactant; and a medium wherein these components are dispersed or emulsified, selected from the group consisting of water and a water-alcohol mixture, to the mineral substrate; and thereafter deactivating the surfactant by application thereto of liquid or gas containing a deactivating agent selected from the group consisting of alkaline, acid, reducing or oxidizing agents.
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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) | 1987-02-20 | 1987-08-22 | 1988-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-20 | 1991-08-22 | 1992-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-20 | 1995-08-22 | 1996-02-21 | $7700.00 | Window Closed / Lapsed |