Patent US4877654A successfully refreshed from Google Patents.
US4877654A
Expired / Lapsed
US
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Buffered silane emulsions for rendering porous substrates water repellent
Assignee: Construction Research and Technology GmbH
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Filing: 1988-05-02
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Granted: 1989-10-31
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Expires: 2008-05-02
Abstract
Abstract There are provided aqueous emulsions useful for rendering porous substrates water repellent comprising (a) a hydrolyzable silane having a determinable pH-stable range, (b) an emulsifying agent having an HLB value of from 2 to 20, an effective amount of (c) a buffering compound to maintain the composition within the pH-stable range; and (d) water. Such buffered compositions are stable on long term storage and maintain high effective levels of active silane content even when they include biocides which may accelerate the hydrolysis of aqueous silane-containing compositions.
Inventors
- 👤 Michael E. Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:32
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/46; C04B41/49; C04B41/4905; C04B41/4922; C04B41/60; C04B41/61; C04B41/62; C04B41/64; C08; C08L; C08L97/00; C08L97/02; C09; C09K; C09K3/00; C09K3/18; B; B27; B27K; B27K2240/00; B27K2240/70; B27K3/00; B27K3/02; B27K3/15; C04B2111/00; C04B2111/00034; C04B2111/00112; C08L83/00; C08L83/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 51
Claim 1
Independent Claim
61 words
A buffered aqueous silane emulsion composition comprising: effective amounts of (a) a hydrolyzable silane essentially hydrolytically stable within a determinable pH range; (b) an emulsifier or mixture of emulsifiers having an HLB value of from about 1.5 to about 20; (c) at least one compound for buffering the pH of said composition within said determinable pH stable range; and (d) water.
Claim 2
Dependent Claim
61 words
A buffered aqueous silane emulsion composition comprising: effective amounts of (a) a hydrolyzable silane essentially hydrolytically stable within a determinable pH range; (b) an emulsifier or mixture of emulsifiers having an HLB value of from about 1.5 to about 20; (c) at least one compound for buffering the pH of said composition within said determinable pH stable range; and (d) water.
Claim 3
Dependent Claim
79 words
A composition as defined in claim 1 wherein said hydrolyzable silane (a) comprises from about 1 to about 60 percent by weight of the composition; said emulsifier (b) comprises from about 0.5 to about 50 percent by weight based on (a); said compound for buffering (c) comprises from about 0.01 to about 5 percent by weight based on (a), (b), (c) and (d) combined; and water (d) is present in an amount sufficient to provide 100 percent by weight.
Claim 4
Dependent Claim
72 words
A composition as defined in claim 1 wherein said hydrolyzable silane has a molecular weight of up to about 600 and comprises a compound of the general formula R.sub.n --Si--(R.sup.1).sub.4-n wherein R is C 1 -C 30 hydrocarbyl or halogenated hydrocarbyl, R 1 is C 1 -C 6 alkoxy, halide, amino carboxyl or a mixture of any of the foregoing and n is 1 or 2, or an oligomer of said compound.
Claim 5
Dependent Claim
13 words
A composition as defined in claim 3 wherein said silane comprises an alkylalkoxysilane.
Claim 6
Dependent Claim
13 words
A composition as defined in claim 4 wherein said silane comprises an alkyltrialkoxysilane.
Claim 7
Dependent Claim
31 words
A composition as defined in claim 3 wherein R comprises a C 1 -C 10 alkyl group, R 1 comprises a C 1 -C 3 alkoxy group and n is 1.
Claim 8
Dependent Claim
18 words
A composition as defined in claim 1 which also includes (e) a small, effective amount of a biocide.
Claim 9
Dependent Claim
12 words
A composition as defined in claim 1 wherein said silane comprises octyltriethoxysilane.
Claim 10
Dependent Claim
27 words
A composition as defined in claim 2 wherein the concentration of said silane (a) comprises from about 10 to about 50 percent by weight of said composition.
Claim 11
Dependent Claim
22 words
A composition as defined in claim 1 wherein said emulsifier (b) has an HLB value of from about 4 to about 17.
Claim 12
Dependent Claim
18 words
A composition as defined in claim 1 wherein said emulsifier (b) comprises at least one nonionic emulsifying agent.
Claim 13
Dependent Claim
17 words
A composition as defined in claim 11 wherein said emulsifier (b) comprises at least one alkylphenol polyethyleneoxyethanol.
Claim 14
Dependent Claim
17 words
A composition as defined in claim 12 wherein said emulsifier (b) comprises at least one octylphenol polyethyleneoxyethanol.
Claim 15
Dependent Claim
28 words
A composition as defined in claim 2 wherein the concentration of said emulsifier (b) comprises from about 1 to about 8 percent by weight based on silane (a).
Claim 16
Dependent Claim
69 words
A composition as defined in claim 1 wherein said compound for buffering (c) comprises a mono- or poly-alkali metal, alkaline earth metal or amine salt of carbonic acid, phosphoric acid, sulfuric acid, hydrosulfuric acid, a C 1 -C 6 organo-, mono- or poly-carboxylic acid, or a C 2 -C 30 alkyleneiminopoly carboxylic acid, ammonia, a C 1 -C 30 organic base, or a mixture of any of the foregoing.
Claim 17
Dependent Claim
24 words
A composition as defined in claim 15 wherein said compound for buffering (c) comprises an alkali metal carbonate or -bicarbonate, or -phosphate or ammonia.
Claim 18
Dependent Claim
16 words
A composition as defined in claim 16 wherein said compound for buffering (c) comprises sodium bicarbonate.
Claim 19
Dependent Claim
26 words
A composition as defined in claim 1 wherein the said buffering compound (c) provides a pH in the range of from about 6 to about 8.
Claim 20
Dependent Claim
18 words
A composition as defined in claim 18 wherein said buffering compound (c) provides a pH of about 7.5.
Claim 21
Dependent Claim
94 words
A process for increasing the resistance to penetration by aqueous media of a porous substrate, said process comprising: (i) applying to the surface of said substrate a buffered aqueous silane emulsion composition comprising effective amounts of (a) a hydrolyzable silane essentially hydrolytically stable within a determinable pH range; (b) an emulsifier or mixture of emulsifiers having an HLB value of from about 1.5 to about 20; (c) at least one compound for buffering the pH of said composition within said determinable pH stable range; and (d) water; and (ii) allowing said composition to cure.
Claim 22
Dependent Claim
94 words
A process for increasing the resistance to penetration by aqueous media of a porous substrate, said process comprising: (i) applying to the surface of said substrate a buffered aqueous silane emulsion composition comprising effective amounts of (a) a hydrolyzable silane essentially hydrolytically stable within a determinable pH range; (b) an emulsifier or mixture of emulsifiers having an HLB value of from about 1.5 to about 20; (c) at least one compound for buffering the pH of said composition within said determinable pH stable range; and (d) water; and (ii) allowing said composition to cure.
Claim 23
Dependent Claim
15 words
A process as defined in claim 20 wherein said porous substrate comprises masonry or wood.
Claim 24
Dependent Claim
73 words
A process as defined in claim 20 wherein said hydrolyzable silane (a) comprises from 1 to about 60 percent by weight; said emulsifier (b) comprises from about 0.5 to about 50 percent by weight based on (a); said compound for buffering (c) comprises from about 0.01 to about 5 percent by weight based on (a), (b), (c) and (d) combined; and water (d) in an amount sufficient to provide 100 percent by weight.
Claim 25
Dependent Claim
73 words
A process as defined in claim 20 wherein said hydrolyzable silane has a molecular weight of up to about 600 and comprises a compound of the general formula R.sub.n --Si--(R.sup.1).sub.4-n wherein R is C 1 -C 30 hydrocarbyl or halogenate hydrocarbyl group, R 1 is C 1 -C 6 alkoxy, halide, amino carboxyl or a mixture of any of the foregoing and n is 1 or 2, or an oligomer of said compound.
Claim 26
Dependent Claim
14 words
A process as defined in claim 23 wherein said hydrolyzable silane comprises an alkylalkoxysilane.
Claim 27
Dependent Claim
14 words
A process as defined in claim 23 wherein said hydrolyzable silane comprises an alkyltrialkoxysilane.
Claim 28
Dependent Claim
33 words
A process as defined in claim 23 wherein said hydrolyzable silane comprises a C 1 -C 10 alkyl group, R 1 comprises a C 1 -C 3 alkoxy group and n is 1.
Claim 29
Dependent Claim
13 words
A process as defined in claim 23 wherein said hydrolyzable silane comprises octyltriethoxysilane.
Claim 30
Dependent Claim
27 words
A process as defined in claim 20 wherein the concentration of said hydrolyzable silane comprises from about 10 to about 50 percent by weight of said composition.
Claim 31
Dependent Claim
22 words
A process as defined in claim 20 wherein said emulsifier (b) has an HLB value of from about 4 to about 17.
Claim 32
Dependent Claim
18 words
A process as defined in claim 20 wherein said emulsifier (b) comprises at least one nonionic emulsifying agent.
Claim 33
Dependent Claim
17 words
A process as defined in claim 20 wherein said emulsifier (b) comprises at least one alkylphenol polyethyleneoxyethanol.
Claim 34
Dependent Claim
17 words
A process as defined in claim 20 wherein said emulsifier (b) comprises at lesat one octylphenol polyethyleneoxyethanol.
Claim 35
Dependent Claim
25 words
A process as defined in claim 20 wherein said emulsifier (b) comprises from about 1 to about 8 percent by weight based on silane (a).
Claim 36
Dependent Claim
67 words
A process as defined in claim 20 wherein said compound for buffering comprises a mono- or poly-alkali metal, alkaline earth metal or amine salt of carbonic acid, phosphoric acid, sulfuric acid, hydrosulfuric acid, a C 1 -C 6 organo-, mono-, or polycarboxylic acid, or a C 2 -C 30 alkyleneiminopolycarboxylic acid, ammonia, a C 1 -C 30 organic base, or a mixture of any of the foregoing.
Claim 37
Dependent Claim
22 words
A process as defined in claim 20 wherein said compound for buffering (c) comprise metal carbonate or -bicarbonate, or -phosphate, or ammonia.
Claim 38
Dependent Claim
16 words
A process as defined in claim 20 wherein said compound for buffering (c) comprises sodium bicarbonate.
Claim 39
Dependent Claim
26 words
A process as defined in claim 21 wherein said compound for buffering (c) provides a pH in the range of from about 6 to about 8.
Claim 40
Dependent Claim
19 words
A process as defined in claim 20 wherein said compound for buffering (c) provides a pH of about 7.5.
Claim 41
Dependent Claim
19 words
A process as defined in claim 20 wherein said composition includes (e) a small, effective amount of a biocide.
Claim 42
Dependent Claim
32 words
A process as defined in claim 20 wherein curing step (ii) is carried out at a temperature about 5° to about 50° C. for from about 4 hours to about 350 hours.
Claim 43
Dependent Claim
125 words
A buffered aqueous silane emulsion composition comprising: effective amounts of (a) a hydrolyzable silane essentially hydrolytically stable within a determinable pH range, wherein said hydrolyzable silane has a molecular weight of up to about 600 and comprises a compound of the general formula R.sub.n --Si--(R.sup.1).sub.4-n wherein R comprises a C 4 -C 10 alkyl group, R 1 is C 1 -C 6 alkoxy, halide, amino, carboxyl or a mixture of any of the foregoing and n is 1 or 2, or an oligomer of said compound; (b) an emulsifier or mixture of emulsifiers having an HLB value of from about 1.5 to about 20; (c) at least one compound for buffering the pH of said composition within said determinable pH stable range; and (d) water.
Claim 44
Dependent Claim
125 words
A buffered aqueous silane emulsion composition comprising: effective amounts of (a) a hydrolyzable silane essentially hydrolytically stable within a determinable pH range, wherein said hydrolyzable silane has a molecular weight of up to about 600 and comprises a compound of the general formula R.sub.n --Si--(R.sup.1).sub.4-n wherein R comprises a C 4 -C 10 alkyl group, R 1 is C 1 -C 6 alkoxy, halide, amino, carboxyl or a mixture of any of the foregoing and n is 1 or 2, or an oligomer of said compound; (b) an emulsifier or mixture of emulsifiers having an HLB value of from about 1.5 to about 20; (c) at least one compound for buffering the pH of said composition within said determinable pH stable range; and (d) water.
Claim 45
Dependent Claim
66 words
A buffered aqueous silane emulsion composition comprising: effective amounts of (a) a hydrolyzable silane essentially hydrolytically stable within a determinable pH range, said silane consisting of octyltriethoxysilane; (b) an emulsifier or mixture of emulsifiers having a HLB value of from about 1.5 to about 20; (c) at least one compound for buffering the pH of said composition within said determinable pH stable range; and (d) water.
Claim 46
Dependent Claim
66 words
A buffered aqueous silane emulsion composition comprising: effective amounts of (a) a hydrolyzable silane essentially hydrolytically stable within a determinable pH range, said silane consisting of octyltriethoxysilane; (b) an emulsifier or mixture of emulsifiers having a HLB value of from about 1.5 to about 20; (c) at least one compound for buffering the pH of said composition within said determinable pH stable range; and (d) water.
Claim 47
Dependent Claim
151 words
A process for increasing the resistance to penetration by aqueous media of a porous substrate, said process comprising: (i) applying to the surface of said substrate a buffered aqueous silane emulsion composition comprising effective amounts of: (a) a hydrolyzable silane essentially hydrolytically stable within a determinable pH range; wherein said silane has a molecular weight of up to about 600 and comprises a compound of the general formula R.sub.n --Si--(R.sup.1).sub.4-n wherein R comprises a C 4 -C 10 alkyl group, R 1 is a C 1 -C 6 alkoxy, halide, amino, carboxyl or a mixture of any of the foregoing and n is 1 or 2, or an oligomer of said compound; (b) an emulsifier or a mixture of emulsifiers having an HLB value of from about 1.5 to about 20; (c) at least one compound for buffering the pH of said composition within said determinable pH range; and (d) water.
Claim 48
Dependent Claim
151 words
A process for increasing the resistance to penetration by aqueous media of a porous substrate, said process comprising: (i) applying to the surface of said substrate a buffered aqueous silane emulsion composition comprising effective amounts of: (a) a hydrolyzable silane essentially hydrolytically stable within a determinable pH range; wherein said silane has a molecular weight of up to about 600 and comprises a compound of the general formula R.sub.n --Si--(R.sup.1).sub.4-n wherein R comprises a C 4 -C 10 alkyl group, R 1 is a C 1 -C 6 alkoxy, halide, amino, carboxyl or a mixture of any of the foregoing and n is 1 or 2, or an oligomer of said compound; (b) an emulsifier or a mixture of emulsifiers having an HLB value of from about 1.5 to about 20; (c) at least one compound for buffering the pH of said composition within said determinable pH range; and (d) water.
Claim 49
Dependent Claim
94 words
A process for increasing the resistance to penetration by aqueous media of a porous substrate, said process comprising: (i) applying to the surface of said substrate a buffered aqueous silane emulsion composition comprising effective amounts of: (a) a hydrolyzable silane essentially hydrolytically stable within a determinable pH range, said silane consisting of octyltriethoxysilane; ( b) an emulsifier or a mixture of emulsifiers having an HLB value of from about 1.5 to about 20; (c) of at least one compound for buffering the pH of said composition within said determinable pH range; and (d) water.
Claim 50
Dependent Claim
94 words
A process for increasing the resistance to penetration by aqueous media of a porous substrate, said process comprising: (i) applying to the surface of said substrate a buffered aqueous silane emulsion composition comprising effective amounts of: (a) a hydrolyzable silane essentially hydrolytically stable within a determinable pH range, said silane consisting of octyltriethoxysilane; ( b) an emulsifier or a mixture of emulsifiers having an HLB value of from about 1.5 to about 20; (c) of at least one compound for buffering the pH of said composition within said determinable pH range; and (d) water.
Claim 51
Dependent Claim
17 words
A composition as defined in claim 3 wherein R comprises a C 8 -C 30 hydrocarbyl group.
References Cited (Backward Citations)
US2683674A
Cited
US3772065A
Cited
US4228054A
Cited
US4175159A
Cited
US4476281A
Cited
US4433013A
Cited
US4342796A
Cited
US4517375A
Cited
US4552910A
Cited
US4525213A
Cited
US4648904A
Cited
US4648904B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-30 | 1993-05-01 | 1993-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-30 | 1997-05-01 | 1997-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-30 | 2001-05-01 | 2001-10-31 | $7700.00 | Window Closed / Lapsed |