US3979546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkoxysiloxanol modified surfaces
Assignee: Wacker Chemical Corp
•
Filing: 1974-01-21
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Granted: 1976-09-07
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Expires: 1994-01-21
Abstract
Abstract Surfaces of inorganic materials are rendered hydrophobic by treating the inorganic materials with alpha-alkoxy-omega-siloxanols which are obtained from the reaction of cyclic siloxanes with alcohols under mild conditions.
Inventors
- 👤 Richard Newton Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:57
CPC Classifications
C; C09; C09C; C09C3/00; C09C3/12; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/40; C08; C08G; C08G77/00; C08G77/04; C08G77/045; C08L; C08L83/00; C08L83/04; C01; C01P; C01P2004/00; C01P2004/10; C01P2006/00; C01P2006/90; C08G77/14; C08G77/16; C08G77/18; C08G77/22; C08G77/24; C08G77/26; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2995
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
101 words
A method of modifying the surfaces of reinforcing agents, selected from the group consisting of siliceous fillers and fibrous materials which comprises contacting the surfaces of said reinforcing agents wih an alpha-alkoxyomega-siloxanol of the formula R'O(R 2 SiO) x H, in which R is selected from the group consisting of hydrocarbon radicals, halogenated hydrocarbon radicals and cyanoalkyl radicals having up to 8 carbon atoms, R' is the radical of an alcohol having up to 20 carbon atoms and x is an integer of from 2 to 10 and thereafter heating the reinforcing agents to a temperature of from 50° to 200°C.
Claim 2
Independent Claim
101 words
A method of modifying the surfaces of reinforcing agents, selected from the group consisting of siliceous fillers and fibrous materials which comprises contacting the surfaces of said reinforcing agents wih an alpha-alkoxyomega-siloxanol of the formula R'O(R 2 SiO) x H, in which R is selected from the group consisting of hydrocarbon radicals, halogenated hydrocarbon radicals and cyanoalkyl radicals having up to 8 carbon atoms, R' is the radical of an alcohol having up to 20 carbon atoms and x is an integer of from 2 to 10 and thereafter heating the reinforcing agents to a temperature of from 50° to 200°C.
Claim 3
Dependent Claim
15 words
Inorganic reinforcing agents whose surface has been rendered hydrophobic by the method of claim 1.
Claim 4
Dependent Claim
15 words
The reinforcing agents of claim 1 in which the siliceous fillers are finely divided silicas.
Claim 5
Dependent Claim
14 words
The reinforcing agents of claim 1 in which the fibrous materials are glass fibers.
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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) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |