US4648904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous systems containing silanes for rendering masonry surfaces water repellant
Assignee: Construction Research and Technology GmbH
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Filing: 1986-02-14
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Granted: 1987-03-10
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Expires: 2006-02-14
Abstract
Abstract There is provided an aqueous emulsion of (a) a hydrolyzable silane having the general formula: Rn-Si-(R')4-n wherein R is a hydrocarbyl group containing from 1 to 20 carbon atoms, R' is a hydrolyzable group and n is 1 or 2, and oligomers thereof, e.g., dimers and trimers, and other oligomers, (b) an emulsifying agent having an HLB value of from 4 to 15, and (c) water.
Inventors
- 👤 Ralph J. DePasquale
- 👤 Michael E. Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:12
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/46; C04B41/49; C04B41/4905; C04B41/4922; C04B41/4944; C04B41/495; C04B41/4977; C04B41/80; C04B41/81; C04B41/82; C04B41/84
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
102 words
An aqueous silane emulsion composition useful to render a porous ceramic material water repellant which consists essentially of (a) from 1% to 40% by weight of hydrolyzable silane having a molecular weight up to about 500 and the general formula: R.sub.n --Si--(R').sub.4-n wherein R is a C 1 -C 20 hydrocarbyl or halogenated hydrocarbyl group, R' is C 1 -C 3 alkoxy or halide or amino or carboxyl group, and n is 1 or 2, or oligomers thereof, (b) from 0.5 to 50% by weight of the silane component of an emulsifier having an HLB value of from 4-15, and (c) water.
Claim 2
Dependent Claim
102 words
An aqueous silane emulsion composition useful to render a porous ceramic material water repellant which consists essentially of (a) from 1% to 40% by weight of hydrolyzable silane having a molecular weight up to about 500 and the general formula: R.sub.n --Si--(R').sub.4-n wherein R is a C 1 -C 20 hydrocarbyl or halogenated hydrocarbyl group, R' is C 1 -C 3 alkoxy or halide or amino or carboxyl group, and n is 1 or 2, or oligomers thereof, (b) from 0.5 to 50% by weight of the silane component of an emulsifier having an HLB value of from 4-15, and (c) water.
Claim 3
Dependent Claim
15 words
An aqueous silane emulsion as defined in claim 1 wherein the silane is an alkylalkoxysilane.
Claim 4
Dependent Claim
15 words
An aqueous silane emulsion as defined in claim 1 wherein the silane is an alkyltrialkoxysilane.
Claim 5
Dependent Claim
32 words
An aqueous silane emulsion as defined in claim 1 wherein R is a C 1 -C 10 alkyl group, R' is a C 1 -C 3 alkoxy group and n is 1.
Claim 6
Dependent Claim
19 words
An aqueous silane emulsion as defined in claim 1 wherein R is a C 4 -C 10 alkyl group.
Claim 7
Dependent Claim
14 words
An aqueous silane emulsion as defined in claim 1 wherein the silane is octyltriethoxysilane.
Claim 8
Dependent Claim
22 words
An aqueous silane emulsion as defined in claim 1 wherein the concentration of the silane is from 10% to 20% by weight.
Claim 9
Dependent Claim
17 words
An aqueous silane emulsion as defined in claim 1 wherein the emulsifier is a nonionic emulsifying agent.
Claim 10
Dependent Claim
17 words
An aqueous silane emulsion as defined in claim 1 wherein the emulsifier is a nonionic polyhydroxy compound.
Claim 11
Dependent Claim
18 words
An aqueous silane emulsion as defined in claim 1 wherein the emulsifier is a sorbitan fatty acid ester.
Claim 12
Dependent Claim
19 words
An aqueous silane emulsion as defined in claim 1 wherein the emulsifier is a polyoxyethylene sorbitan fatty acid ester.
Claim 13
Dependent Claim
14 words
An aqueous silane emulsion as defined in claim 1 wherein the silane is isobutyltrimethoxysilane.
Claim 14
Dependent Claim
14 words
An aqueous silane emulsion as defined in claim 1 wherein the silane is octadecyltriethoxysilane.
Claim 15
Dependent Claim
14 words
An aqueous silane emulsion as defined in claim 1 wherein the silane is 4R-triethoxysilylmenthene-1.
Claim 16
Dependent Claim
108 words
A process for increasing the resistance to penetration by aqueous media of masonry which comprises applying to the surface thereof an aqueous silane emulsion which consists essentially of (a) from 1% to 40% by weight of hydrolyzable silane having a molecular weight up to about 500 and the general formula: R.sub.n --Si--(R').sub.4-n wherein R is a C 1 -C 20 hydrocarbyl or halogenated hydrocarbyl group, R' is C 1 -C 3 alkoxy, halide, amino, carboxylate, and n is 1 or 2, or oligomers thereof, (b) from 0.5 to 50% by weight of the silane component of an emulsifier having an HLB value of from 4-15, and (c) water.
Claim 17
Dependent Claim
108 words
A process for increasing the resistance to penetration by aqueous media of masonry which comprises applying to the surface thereof an aqueous silane emulsion which consists essentially of (a) from 1% to 40% by weight of hydrolyzable silane having a molecular weight up to about 500 and the general formula: R.sub.n --Si--(R').sub.4-n wherein R is a C 1 -C 20 hydrocarbyl or halogenated hydrocarbyl group, R' is C 1 -C 3 alkoxy, halide, amino, carboxylate, and n is 1 or 2, or oligomers thereof, (b) from 0.5 to 50% by weight of the silane component of an emulsifier having an HLB value of from 4-15, and (c) water.
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) | 1990-03-09 | 1990-09-08 | 1991-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-09 | 1994-09-08 | 1995-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-09 | 1998-09-08 | 1999-03-10 | $7700.00 | Window Closed / Lapsed |