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US5212230A
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US
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Aqueous polyurea dispersions prepared by an emulsion polymerization process
Assignee: Bayer Corp
•
Filing: 1991-03-28
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Granted: 1993-05-18
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Expires: 2011-03-28
Abstract
Abstract The present invention is directed to a process for the preparation of an aqueous polyurea dispersion by a) dispersing in water at an NCO:NH equivalent ratio of 0.5:1.0 to 2.0:1.0 i) a polyisocyanate which has an average functionality of 1.5 to 4.0 and an isocyanate content of at least 12% by weight and ii) a polyamine having at least two primary and/or secondary amino groups and a molecular weight of at least at an NCO:OH equivalent ratio of 0.5:1.0 to 2.0:1.01000 and b) allowing the polyisocyanate and polyamine to react to form an aqueous polyurea dispersion. The present invention is also directed to the aqueous polyurea dispersion prepared by this process.
Inventors
- 👤 Robin E. Tirpak
- 👤 Peter H. Markusch
- 👤 Ashok M. Sarpeshkar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:55
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5024; C08G18/08; C08G18/0838; C08G18/0842; C08G18/0861; C08G18/0866; C08G18/5036; C08G18/5048
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
83 words
A process for the preparation of an aqueous polyurea dispersion which comprises a) dispersing in water at an NCO:NH equivalent ratio of 0.5:1.0 to 2.0:1.0 i) a polyisocyanate which has an average functionality of 1.5 to 4.0 and an isocyanate content of at least 12% by weight and ii) a polyamine having at least two primary and/or secondary amino groups and a molecular weight of at least 1000 and b) allowing the polyisocyanate and polyamine to react to form an aqueous polyurea dispersion.
Claim 2
Dependent Claim
83 words
A process for the preparation of an aqueous polyurea dispersion which comprises a) dispersing in water at an NCO:NH equivalent ratio of 0.5:1.0 to 2.0:1.0 i) a polyisocyanate which has an average functionality of 1.5 to 4.0 and an isocyanate content of at least 12% by weight and ii) a polyamine having at least two primary and/or secondary amino groups and a molecular weight of at least 1000 and b) allowing the polyisocyanate and polyamine to react to form an aqueous polyurea dispersion.
Claim 3
Dependent Claim
25 words
The process of claim 1 wherein said dispersed polyisocyanate was rendered hydrophilic by reaction with a compound containing a lateral or terminal nonionic hydrophilic group.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein said polyamine comprises an aminated polyether.
Claim 5
Dependent Claim
12 words
The process of claim 2 wherein said polyamine comprises an aminated polyether.
Claim 6
Dependent Claim
83 words
A process for the preparation of an aqueous polyurea dispersion which comprises a) dispersing in water at an NCO:NH equivalent ratio of 0.5:1.0 to 2.0:1.0 i) a polyisocyanate which has an average functionality of 1.5 to 2.5 and an isocyanate content of at least 12% by weight and ii) a polyamine having at least two primary and/or secondary amino groups and a molecular weight of at least 1000 and b) allowing the polyisocyanate and polyamine to react to form an aqueous polyurea dispersion.
Claim 7
Dependent Claim
83 words
A process for the preparation of an aqueous polyurea dispersion which comprises a) dispersing in water at an NCO:NH equivalent ratio of 0.5:1.0 to 2.0:1.0 i) a polyisocyanate which has an average functionality of 1.5 to 2.5 and an isocyanate content of at least 12% by weight and ii) a polyamine having at least two primary and/or secondary amino groups and a molecular weight of at least 1000 and b) allowing the polyisocyanate and polyamine to react to form an aqueous polyurea dispersion.
Claim 8
Dependent Claim
25 words
The process of claim 5 wherein said dispersed polyisocyanate was rendered hydrophilic by reaction with a compound containing a lateral or terminal nonionic hydrophilic group.
Claim 9
Dependent Claim
12 words
The process of claim 5 wherein said polyamine comprises an aminated polyether.
Claim 10
Dependent Claim
12 words
The process of claim 6 wherein said polyamine comprises an aminated polyether.
Claim 11
Dependent Claim
83 words
An aqueous polyurea dispersion which is prepared by a process which comprises a) dispersing in water at an NCO:NH equivalent ratio of 0.5:1.0 to 2.0:1.0 i) a polyisocyanate which has an average functionality of 1.5 to 4.0 and an isocyanate content of at least 12% by weight and ii) a polyamine having at least two primary and/or secondary amino groups and a molecular weight of at least 1000 and b) allowing the polyisocyanate and polyamine to react to form an aqueous polyurea dispersion.
Claim 12
Dependent Claim
83 words
An aqueous polyurea dispersion which is prepared by a process which comprises a) dispersing in water at an NCO:NH equivalent ratio of 0.5:1.0 to 2.0:1.0 i) a polyisocyanate which has an average functionality of 1.5 to 4.0 and an isocyanate content of at least 12% by weight and ii) a polyamine having at least two primary and/or secondary amino groups and a molecular weight of at least 1000 and b) allowing the polyisocyanate and polyamine to react to form an aqueous polyurea dispersion.
Claim 13
Dependent Claim
25 words
The dispersion of claim 9 wherein said dispersed polyisocyanate was rendered hydrophilic by reaction with a compound containing a lateral or terminal nonionic hydrophilic group.
Claim 14
Dependent Claim
12 words
The dispersion of claim 9 wherein said polyamine comprises an aminated polyether.
Claim 15
Dependent Claim
12 words
The dispersion of claim 10 wherein said polyamine comprises an aminated polyether.
Claim 16
Dependent Claim
83 words
An aqueous polyurea dispersion which is prepared by a process which comprises a) dispersing in water at an NCO:NH equivalent ratio of 0.5:1.0 to 2.0:1.0 i) a polyisocyanate which has an average functionality of 1.5 to 2.5 and an isocyanate content of at least 12% by weight and ii) a polyamine having at least two primary and/or secondary amino groups and a molecular weight of at least 1000 and b) allowing the polyisocyanate and polyamine to react to form an aqueous polyurea dispersion.
Claim 17
Dependent Claim
83 words
An aqueous polyurea dispersion which is prepared by a process which comprises a) dispersing in water at an NCO:NH equivalent ratio of 0.5:1.0 to 2.0:1.0 i) a polyisocyanate which has an average functionality of 1.5 to 2.5 and an isocyanate content of at least 12% by weight and ii) a polyamine having at least two primary and/or secondary amino groups and a molecular weight of at least 1000 and b) allowing the polyisocyanate and polyamine to react to form an aqueous polyurea dispersion.
Claim 18
Dependent Claim
25 words
The dispersion of claim 13 wherein said dispersed polyisocyanate was rendered hydrophilic by reaction with a compound containing a lateral or terminal nonionic hydrophilic group.
Claim 19
Dependent Claim
12 words
The dispersion of claim 13 wherein said polyamine comprises an aminated polyether.
Claim 20
Dependent Claim
12 words
The dispersion of claim 14 wherein said polyamine comprises an aminated polyether.
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) | 1996-05-17 | 1996-11-16 | 1997-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-17 | 2000-11-16 | 2001-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-17 | 2004-11-16 | 2005-05-18 | $7700.00 | Window Closed / Lapsed |