US4990377A
Expired / Lapsed
US
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Buffered silane emulsions having low volatile organic compounds when cured
Assignee: Construction Research and Technology GmbH
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Filing: 1989-08-10
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Granted: 1991-02-05
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Expires: 2009-08-10
Abstract
Abstract There are provided aqueous emulsions useful for rendering porous substrates water repellent having low volatile organic compound content when cured comprising effective amounts of (a) a hydrolyzable silane having a determinable pH-stable range, (b) an emulsifying agent having an HLB value of from 2 to 20, (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
2026-11-08 06:47
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/45; C04B41/46; C04B41/49; C04B41/4905; C04B41/4922; C04B41/60; C04B41/61; C04B41/62; C04B41/64; C09; C09D; C09D4/00; C09K; C09K3/00; C09K3/18; B; B27; B27K; B27K2240/00; B27K2240/70; B27K3/00; B27K3/02; B27K3/15; B27K3/34; B27K3/36; C04B2111/00; C04B2111/00034; C04B2111/00112; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 76
Claim 1
Independent Claim
75 words
A buffered aqueous silane emulsion composition having a volatile organic compound content of less than about 400 g/l after curing 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
75 words
A buffered aqueous silane emulsion composition having a volatile organic compound content of less than about 400 g/l after curing 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
22 words
A composition as defined in claim 1 wherein said composition has a volatile organic compound content of less than about 350 g/l.
Claim 4
Dependent Claim
22 words
A composition as defined in claim 2 wherein said composition has a volatile organic compound content of less than about 300 g/l.
Claim 5
Dependent Claim
22 words
A composition as defined in claim 3 wherein said composition has a volatile organic compound content of less than about 250 g/l.
Claim 6
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 7
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 8
Dependent Claim
18 words
A composition as defined in claim 6 wherein R is C 6 -C 30 hydrocarbyl or halogenated hydrocarbyl.
Claim 9
Dependent Claim
18 words
A composition as defined in claim 7 wherein R is C 8 -C 30 hydrocarbyl or halogenated hydrocarbyl.
Claim 10
Dependent Claim
13 words
A composition as defined in claim 6 wherein said silane comprises an alkylalkoxysilane.
Claim 11
Dependent Claim
13 words
A composition as defined in claim 9 wherein said silane comprises an alkyltrialkoxysilane.
Claim 12
Dependent Claim
31 words
A composition as defined in claim 6 wherein R comprises a C 4 -C 12 alkyl group, R 1 comprises a C 1 -C 3 alkoxy group and n is 1.
Claim 13
Dependent Claim
17 words
A composition as defined in claim 6 wherein R comprises a C 6 -C 12 alkyl group.
Claim 14
Dependent Claim
12 words
A composition as defined in claim 1 wherein said silane comprises octyltriethoxysilane.
Claim 15
Dependent Claim
12 words
A composition as defined in claim 1 wherein said silane comprises isobutyltrimethoxysilane.
Claim 16
Dependent Claim
13 words
A composition as defined in claim 1 wherein said silane comprises bis(octyldiethoxysilane) dimer.
Claim 17
Dependent Claim
12 words
A composition as defined in claim 1 wherein said silane comprises octyltrimethoxysilane.
Claim 18
Dependent Claim
12 words
A composition as defined in claim 1 wherein said silane comprises decyltriethoxysilane.
Claim 19
Dependent Claim
12 words
A composition as defined in claim 1 wherein said silane comprises dodecyltriethoxysilane.
Claim 20
Dependent Claim
12 words
A composition as defined in claim 1 wherein said silane comprises bis(dodecyldiethoxysiloxane)dimer.
Claim 21
Dependent Claim
12 words
A composition as defined in claim 1 wherein said silane comprises tetradecyltriethoxysilane.
Claim 22
Dependent Claim
12 words
A composition as defined in claim 1 wherein said silane comprises hexadecyltriethoxysilane.
Claim 23
Dependent Claim
12 words
A composition as defined in claim 1 wherein said silane comprises octadecyltriethoxysilane.
Claim 24
Dependent Claim
12 words
A composition as defined in claim 1 wherein said silane comprises octadecyltrimethoxysilane.
Claim 25
Dependent Claim
12 words
A composition as defined in claim 1 wherein said silane comprises 1,3-diethoxyhexamethyltrisiloxane.
Claim 26
Dependent Claim
27 words
A composition as defined in claim 5 wherein the concentration of said silane (a) comprises from about 10 to about 50 percent by weight of said composition.
Claim 27
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 28
Dependent Claim
18 words
A composition as defined in claim 1 wherein said emulsifier (b) comprises at least one nonionic emulsifying agent.
Claim 29
Dependent Claim
17 words
A composition as defined in claim 27 wherein said emulsifier (b) comprises at least one alkylphenol polyethyleneoxyethanol.
Claim 30
Dependent Claim
17 words
A composition as defined in claim 28 wherein said emulsifier (b) comprises at least one octylphenol polyethyleneoxyethanol.
Claim 31
Dependent Claim
28 words
A composition as defined in claim 5 wherein the concentration of said emulsifier (b) comprises from about 1 to about 8 percent by weight based on silane (a).
Claim 32
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 33
Dependent Claim
24 words
A composition as defined in claim 31 wherein said compound for buffering (c) comprises an alkali metal carbonate or -bicarbonate, or -phosphate or ammonia.
Claim 34
Dependent Claim
16 words
A composition as defined in claim 32 wherein said compound for buffering (c) comprises sodium bicarbonate.
Claim 35
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 36
Dependent Claim
18 words
A composition as defined in claim 34 wherein said buffering compound (c) provides a pH of about 7.5.
Claim 37
Dependent Claim
18 words
A composition as defined in claim 1 which also includes (e) a small, effective amount of a biocide.
Claim 38
Dependent Claim
108 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 having a volatile organic compound content of less than about 400 g/l when cured 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 39
Dependent Claim
108 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 having a volatile organic compound content of less than about 400 g/l when cured 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 40
Dependent Claim
22 words
A process as defined in claim 37 wherein said composition has a volatile organic compound content of less than about 350 g/l.
Claim 41
Dependent Claim
22 words
A process as defined in claim 38 wherein said composition has a volatile organic compound content of less than about 300 g/l.
Claim 42
Dependent Claim
22 words
A process as defined in claim 39 wherein said composition has a volatile organic compound content of less than about 250 g/l.
Claim 43
Dependent Claim
18 words
A process as defined in claim 39 wherein said porous substrate comprises masonry, cement, expanded perlite or wood.
Claim 44
Dependent Claim
74 words
A process as defined in claim 37 wherein said hydrolyzable silane (a) comprises from about 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 45
Dependent Claim
73 words
A process as defined in claim 37 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 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 46
Dependent Claim
19 words
A process as defined in claim 43 wherein R is a C 6 -C 30 hydrocarbyl or halogenated hydrocarbyl.
Claim 47
Dependent Claim
18 words
A process as defined in claim 44 wherein R is C 8 -C 30 hydrocarbyl or halogenated hydrocarbyl.
Claim 48
Dependent Claim
14 words
A process as defined in claim 43 wherein said hydrolyzable silane comprises an alkylalkoxysilane.
Claim 49
Dependent Claim
14 words
A process as defined in claim 43 wherein said hydrolyzable silane comprises an alkyltrialkoxysilane.
Claim 50
Dependent Claim
33 words
A process as defined in claim 43 wherein said hydrolyzable silane comprises a C 4 -C 12 alkyl group, R 1 comprises a C 1 -C 3 alkoxy group and n is 1.
Claim 51
Dependent Claim
19 words
A process as defined in claim 43 wherein said hydrolyzable silane comprises a C 6 -C 12 alkyl group.
Claim 52
Dependent Claim
13 words
A process as defined in claim 43 wherein said hydrolyzable silane comprises octyltriethoxysilane.
Claim 53
Dependent Claim
12 words
A process as defined in claim 37 wherein said silane comprises isobutyltrimethoxysilane.
Claim 54
Dependent Claim
12 words
A process as defined in claim 37 wherein said silane comprises bis(octyldiethoxysiloxane)dimer.
Claim 55
Dependent Claim
12 words
A process as defined in claim 37 wherein said silane comprises octyltrimethoxysilane.
Claim 56
Dependent Claim
12 words
A process as defined in claim 37 wherein said silane comprises decyltriethoxysilane.
Claim 57
Dependent Claim
12 words
A process as defined in claim 37 wherein said silane comprises dodecyltriethoxysilane.
Claim 58
Dependent Claim
12 words
A process as defined in claim 37 wherein said silane comprises bis(dodecyldiethoxysiloxane)dimer.
Claim 59
Dependent Claim
12 words
A process as defined in claim 37 wherein said silane comprises tetradecyltriethoxysilane.
Claim 60
Dependent Claim
12 words
A process as defined in claim 37 wherein said silane comprises hexadecyltriethoxysilane.
Claim 61
Dependent Claim
12 words
A process as defined in claim 37 wherein said silane comprises octadecyltriethoxysilane.
Claim 62
Dependent Claim
12 words
A process as defined in claim 37 wherein said silane comprises octadecyltrimethoxysilane.
Claim 63
Dependent Claim
12 words
A process as defined in claim 37 wherein said silane comprises 1,3-diethoxyhexamethyltrisiloxane.
Claim 64
Dependent Claim
27 words
A process as defined in claim 37 wherein the concentration of said hydrolyzable silane comprises from about 10 to about 50 percent by weight of said composition.
Claim 65
Dependent Claim
22 words
A process as defined in claim 37 wherein said emulsifier (b) has an HLB value of from about 4 to about 17.
Claim 66
Dependent Claim
18 words
A process as defined in claim 37 wherein said emulsifier (b) comprises at least one nonionic emulsifying agent.
Claim 67
Dependent Claim
17 words
A process as defined in claim 37 wherein said emulsifier (b) comprises at least one alkylphenol polyethyleneoxyethanol.
Claim 68
Dependent Claim
17 words
A process as defined in claim 37 wherein said emulsifier (b) comprises at least one octylphenol polyethyleneoxyethanol.
Claim 69
Dependent Claim
25 words
A process as defined in claim 37 wherein said emulsifier (b) comprises from about 1 to about 8 percent by weight based on silane (a).
Claim 70
Dependent Claim
67 words
A process as defined in claim 37 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 71
Dependent Claim
24 words
A process as defined in claim 37 wherein said compound for buffering (c) comprises an alkali metal carbonate or -bicarbonate, or -phosphate, or ammonia.
Claim 72
Dependent Claim
16 words
A process as defined in claim 37 wherein said compound for buffering (c) comprises sodium bicarbonate.
Claim 73
Dependent Claim
26 words
A process as defined in claim 37 wherein said compound for buffering (c) provides a pH in the range of from about 6 to about 8.
Claim 74
Dependent Claim
19 words
A process as defined in claim 37 wherein said compound for buffering (c) provides a pH of about 7.5.
Claim 75
Dependent Claim
19 words
A process as defined in claim 37 wherein said composition includes. (e) a small, effective amount of a biocide.
Claim 76
Dependent Claim
34 words
A process as defined in claim 37 wherein curing step (ii) is carried out at a temperature of from about 5° to about 50° C. for from about 4 hours to about 350 hours.
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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) | 1994-02-04 | 1994-08-06 | 1995-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-04 | 1998-08-06 | 1999-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-04 | 2002-08-06 | 2003-02-05 | $7700.00 | Window Closed / Lapsed |