US5236994A
Expired / Lapsed
US
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Process for sealing and/or priming concrete with aqueous polyisocyanate dispersions and the concrete obtained by this process
Assignee: Bayer Corp
•
Filing: 1991-03-28
•
Granted: 1993-08-17
•
Expires: 2011-03-28
Abstract
Abstract The present invention is directed to a process for sealing and/or priming concrete by applying to concrete an aqueous polyisocyanate dispersion which has an isocyanate content of at least 0.5% by weight, based on the weight of the polyisocyanate, and is prepared by a) dispersing in water a polyisocyanate which has an isocyanate content of at least 12% by weight and b) optionally reacting the dispersed polyisocyanate with i) a primary or secondary monoamine containing at least one hydroxyl group in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0:1.0 to 0.7:1.0 and/or ii) a polyamine having primary and/or secondary amino groups and a molecular weight of 400 or less in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0:1.0 to 0.4:1.0, provided that when components i) and ii) are both reacted with the dispersed polyisocyanate, component i) is mixed with the dispersed polyisocyanate either before or during the mixing of component ii) and the equivalent ratio of amino groups from both components i) and ii) does not exceed 0.95:1.0. The present invention is also directed to the primed and sealed concrete obtained in accordance with this process.
Inventors
- 👤 Peter H. Markusch
- 👤 William Cibulas
- 👤 Robin E. Tirpak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:36
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/46; C04B41/48; C04B41/488; C04B41/4884; C04B41/60; C04B41/61; C04B41/62; C04B41/63; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/2805; C08G18/2815; C08G18/283; C08G18/70; C08G18/703; C08G18/705; C08G18/706; C08G18/72; C08G18/80; C08G18/8003; C08G18/8006; C08G18/8038; C08G18/8041; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31598
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
183 words
A process for sealing an/or priming concrete which comprises applying to concrete an aqueous polyisocyanate dispersion which has an isocyanate content of at least 0.5% by weight, based on the weight of the polyisocyanate, and is prepared by a process which comprises a) dispersing in water a polyisocyanate which has an isocyanate content of at least 12% by weight and b) optionally reacting the dispersed polyisocyanate with i) a primary or secondary monoamine containing one or two hydroxyl groups in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0:1.0 to 0.7:1.0 and/or ii) a polyamine having primary and/or secondary amino groups and a molecular weight of 400 or less in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0:1.0 to 0.4:1.0, provided that when components i) and ii) are both reacted with the dispersed polyisocyanate, component i) is mixed with the dispersed polyisocyanate either before or during the mixing of component ii) and the equivalent ratio of amino groups from both components i) and ii) does not exceed 0.95:1.0.
Claim 2
Dependent Claim
183 words
A process for sealing an/or priming concrete which comprises applying to concrete an aqueous polyisocyanate dispersion which has an isocyanate content of at least 0.5% by weight, based on the weight of the polyisocyanate, and is prepared by a process which comprises a) dispersing in water a polyisocyanate which has an isocyanate content of at least 12% by weight and b) optionally reacting the dispersed polyisocyanate with i) a primary or secondary monoamine containing one or two hydroxyl groups in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0:1.0 to 0.7:1.0 and/or ii) a polyamine having primary and/or secondary amino groups and a molecular weight of 400 or less in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0:1.0 to 0.4:1.0, provided that when components i) and ii) are both reacted with the dispersed polyisocyanate, component i) is mixed with the dispersed polyisocyanate either before or during the mixing of component ii) and the equivalent ratio of amino groups from both components i) and ii) does not exceed 0.95:1.0.
Claim 3
Dependent Claim
25 words
The process of claim 1 wherein said dispersed polyisocyanate is rendered hydrophilic by reaction with a compound containing a lateral or terminal nonionic hydrophilic group.
Claim 4
Dependent Claim
61 words
The process of claim 1 wherein said primary or secondary monoamine corresponds to the formula ##STR3## wherein R 1 represents hydrogen or an alkyl, cycloalkyl, araliphatic or aromatic group having up to 15 carbon atoms, R 2 is an optionally branched alkylene group containing 1 to 12 carbon atoms, m represents 0 or 1, n represents 1 or 2 and m+n=2.
Claim 5
Dependent Claim
33 words
The process of claim 3 wherein R 1 is an alkyl group containing 1 to 6 carbon atoms and R 2 is an optionally branched alkylene group containing 1 to 4 carbon atoms.
Claim 6
Dependent Claim
11 words
The process of claim 1 wherein said concrete is green concrete.
Claim 7
Dependent Claim
29 words
The process of claim 1 wherein said monoamine is present in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0.1:1.0 to 0.7:1.0.
Claim 8
Dependent Claim
29 words
The process of claim 1 wherein said polyamine is present in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0.1:1.0 to 0.4:1.0.
Claim 9
Dependent Claim
29 words
The process of claim 7 wherein said polyamine is present in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0.1:1.0 to 0.4:1.0.
Claim 10
Dependent Claim
210 words
A process for sealing and/or priming concrete which comprises applying to concrete an aqueous polyisocyanate dispersion which has a functionality of at least 2 and an isocyanate content of at least 0.5% by weight, based on the weight of the polyisocyanate, and is prepared by a process which comprises a) dispersing in water a polyisocyanate which has an isocyanate content of at least 12% by weight and is rendered hydrophilic by reaction with a compound containing a lateral or terminal nonionic hydrophilic group and b) reacting the dispersed polyisocyanate with at least one of i) a primary or secondary monoamine containing one or two hydroxyl groups in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0.1:1.0 to 0.7:1.0 and ii) a polyamine having primary and/or secondary amino groups and a molecular weight of 400 or less in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0.1:1.0 to 0.4:1.0, provided that when components i) and ii) are both reacted with the dispersed polyisocyanate, component i) is mixed with the dispersed polyisocyanate either before or during the mixing of component ii) and the equivalent ratio of amino groups from both components i) and ii) does not exceed 0.95:1.0.
Claim 11
Dependent Claim
210 words
A process for sealing and/or priming concrete which comprises applying to concrete an aqueous polyisocyanate dispersion which has a functionality of at least 2 and an isocyanate content of at least 0.5% by weight, based on the weight of the polyisocyanate, and is prepared by a process which comprises a) dispersing in water a polyisocyanate which has an isocyanate content of at least 12% by weight and is rendered hydrophilic by reaction with a compound containing a lateral or terminal nonionic hydrophilic group and b) reacting the dispersed polyisocyanate with at least one of i) a primary or secondary monoamine containing one or two hydroxyl groups in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0.1:1.0 to 0.7:1.0 and ii) a polyamine having primary and/or secondary amino groups and a molecular weight of 400 or less in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0.1:1.0 to 0.4:1.0, provided that when components i) and ii) are both reacted with the dispersed polyisocyanate, component i) is mixed with the dispersed polyisocyanate either before or during the mixing of component ii) and the equivalent ratio of amino groups from both components i) and ii) does not exceed 0.95:1.0.
Claim 12
Dependent Claim
61 words
The process of claim 9 wherein said primary or secondary monoamine corresponds to the formula ##STR4## wherein R 1 represents hydrogen or an alkyl, cycloalkyl, araliphatic or aromatic group having up to 15 carbon atoms, R 2 is an optionally branched alkylene group containing 1 to 12 carbon atoms, m represents 0 or 1, n represents 1 or 2 and m+n=2.
Claim 13
Dependent Claim
33 words
The process of claim 10 wherein R 1 is an alkyl group containing 1 to 6 carbon atoms and R 2 is an optionally branched alkylene group containing 1 to 4 carbon atoms.
Claim 14
Dependent Claim
11 words
The process of claim 9 wherein said concrete is green concrete.
Claim 15
Dependent Claim
182 words
Sealed and/or primed concrete which is prepared by applying to concrete an aqueous polyisocyanate dispersion which has an isocyanate content of at least 0.5% by weight, based on the weight of the polyisocyanate, and is prepared by a process which comprises a) dispersing in water a polyisocyanate which has an isocyanate content of at least 12% by weight and b) optionally reacting the dispersing polyisocyanate with i) a primary or secondary monoamine containing one or two hydroxyl groups in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0:1.0 to 0.7:1.0 and/or ii) a polyamine having primary and/or secondary amino groups and a molecular weight of 400 or less in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0:1.0 to 0.4:1.0, provided that when components i) and ii) are both reacted with the dispersed polyisocyanate, component i) is mixed with the dispersed polyisocyanate either before or during the mixing of component ii) and the equivalent ratio of amino groups from both components i) and ii) does not exceed 0.95:1.0.
Claim 16
Dependent Claim
182 words
Sealed and/or primed concrete which is prepared by applying to concrete an aqueous polyisocyanate dispersion which has an isocyanate content of at least 0.5% by weight, based on the weight of the polyisocyanate, and is prepared by a process which comprises a) dispersing in water a polyisocyanate which has an isocyanate content of at least 12% by weight and b) optionally reacting the dispersing polyisocyanate with i) a primary or secondary monoamine containing one or two hydroxyl groups in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0:1.0 to 0.7:1.0 and/or ii) a polyamine having primary and/or secondary amino groups and a molecular weight of 400 or less in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0:1.0 to 0.4:1.0, provided that when components i) and ii) are both reacted with the dispersed polyisocyanate, component i) is mixed with the dispersed polyisocyanate either before or during the mixing of component ii) and the equivalent ratio of amino groups from both components i) and ii) does not exceed 0.95:1.0.
Claim 17
Dependent Claim
25 words
The concrete of claim 13 wherein said dispersed polyisocyanate is rendered hydrophilic by reaction with a compound containing a lateral or terminal nonionic hydrophilic group.
Claim 18
Dependent Claim
61 words
The concrete of claim 13 wherein said primary or secondary monoamine corresponds to the formula ##STR5## wherein R 1 represents hydrogen or an alkyl, cycloalkyl, araliphatic or aromatic group having up to 15 carbon atoms, R 2 is an optionally branched alkylene group containing 1 to 12 carbon atoms, m represents 0 or 1, n represents 1 or 2 and m+n=2.
Claim 19
Dependent Claim
33 words
The concrete of claim 15 wherein R 1 is an alkyl group containing 1 to 6 carbon atoms and R 2 is an optionally branched alkylene group containing 1 to 4 carbon atoms.
Claim 20
Dependent Claim
11 words
The concrete of claim 13 wherein said concrete is green concrete.
Claim 21
Dependent Claim
29 words
The concrete of claim 13 wherein said monoamine is present in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0.1:1.0 to 0.7:1.0.
Claim 22
Dependent Claim
29 words
The concrete of claim 13 wherein said polyamine is present in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0.1:1.0 to 0.4:1.0.
Claim 23
Dependent Claim
29 words
The concrete of claim 19 wherein said polyamine is present in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0.1:1.0 to 0.4:1.0.
Claim 24
Dependent Claim
210 words
A sealed or primed concrete which is prepared by applying to concrete an aqueous polyisocyanate dispersion which has a functionality of at least 2 and an isocyanate content of at least 0.5% by weight, based on the weight of the polyisocyanate, and is prepared by a process which comprises a) dispersing in water a polyisocyanate which has an isocyanate content of at least 12% by weight and is rendered hydrophilic by reaction with a compound containing a lateral or terminal nonionic hydrophilic group and b) reacting the dispersed polyisocyanate with at least one of i) a primary or secondary monoamine containing one or two hydroxyl groups in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0.1:1.0 to 0.7:1.0 and ii) a polyamine having primary and/or secondary amino groups and a molecular weight of 400 or less in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0.1:1.0 to 0.4:1.0, provided that when components i) and ii) are both reacted with the dispersed polyisocyanate, component i) is mixed with the dispersed polyisocyanate either before or during the mixing of component ii) and the equivalent ratio of amino groups from both components i) and ii) does not exceed 0.95:1.0.
Claim 25
Dependent Claim
210 words
A sealed or primed concrete which is prepared by applying to concrete an aqueous polyisocyanate dispersion which has a functionality of at least 2 and an isocyanate content of at least 0.5% by weight, based on the weight of the polyisocyanate, and is prepared by a process which comprises a) dispersing in water a polyisocyanate which has an isocyanate content of at least 12% by weight and is rendered hydrophilic by reaction with a compound containing a lateral or terminal nonionic hydrophilic group and b) reacting the dispersed polyisocyanate with at least one of i) a primary or secondary monoamine containing one or two hydroxyl groups in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0.1:1.0 to 0.7:1.0 and ii) a polyamine having primary and/or secondary amino groups and a molecular weight of 400 or less in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0.1:1.0 to 0.4:1.0, provided that when components i) and ii) are both reacted with the dispersed polyisocyanate, component i) is mixed with the dispersed polyisocyanate either before or during the mixing of component ii) and the equivalent ratio of amino groups from both components i) and ii) does not exceed 0.95:1.0.
Claim 26
Dependent Claim
61 words
The concrete of claim 21 wherein said primary or secondary monoamine corresponds to the formula ##STR6## wherein R 1 represents hydrogen or an alkyl, cycloalkyl, araliphatic or aromatic group having up to 15 carbon atoms, R 2 is an optionally branched alkylene group containing 1 to 12 carbon atoms, m represents 0 or 1, n represents 1 or 2 and m+n=2.
Claim 27
Dependent Claim
33 words
The concrete of claim 22 wherein R 1 is an alkyl group containing 1 to 6 carbon atoms and R 2 is an optionally branched alkylene group containing 1 to 4 carbon atoms.
Claim 28
Dependent Claim
11 words
The concrete of claim 21 wherein said concrete is green concrete.
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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) | 1996-08-16 | 1997-02-15 | 1997-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-16 | 2001-02-15 | 2001-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-16 | 2005-02-15 | 2005-08-17 | $7700.00 | Window Closed / Lapsed |