CA2047635A1 - Two-component aqueous polyurethane dispersions - Google Patents
Two-component aqueous polyurethane dispersionsInfo
- Publication number
- CA2047635A1 CA2047635A1 CA 2047635 CA2047635A CA2047635A1 CA 2047635 A1 CA2047635 A1 CA 2047635A1 CA 2047635 CA2047635 CA 2047635 CA 2047635 A CA2047635 A CA 2047635A CA 2047635 A1 CA2047635 A1 CA 2047635A1
- Authority
- CA
- Canada
- Prior art keywords
- weight
- polyisocyanate
- polyurethane
- groups
- present
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Polyurethanes Or Polyureas (AREA)
- Paints Or Removers (AREA)
Abstract
The present invention relates to a two-component, aqueous polyurethane coating composition which may be cured at ambient temperature and which contains I) a first component based on an aqueously dispersed poly-urethane wherein the polyurethane has a) an average hydroxy functionality of at least 1.8 b) a total content of urethane and urea groups, calculated as -NH-C-O-, of 9 to 20% by weight, based on the weight of the polyurethane, and c) sufficient chemically incorporated anionic groups and d) ethylene oxide units incorporated within terminal and/or lateral polyether chains to maintain the polyurethane stably dispersed in water, and II) a second component based on a water dispersible polyisocyanate wherein the polyisocyanate has a) an isocyanate content of 2 to 30% by weight, based on the weight of the polyisocyanate, b) an average functionality of at least 1.8 and c) sufficient chemically incorporated anionic groups and d) ethylene oxide units incorporated within terminal and/or lateral polyether chains to maintain the polyisocyanate stably dispersed in water, and components I and II are present in an amount sufficient to provide an equivalent ratio of isocyanate groups to hydroxyl groups of 0.8:1 to 6:1.
The present invention is also directed to the coatings prepared from these coating compositions.
The present invention is also directed to the coatings prepared from these coating compositions.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US55980590A | 1990-07-30 | 1990-07-30 | |
US07/559,805 | 1990-07-30 | ||
US64418091A | 1991-01-22 | 1991-01-22 | |
US07/644,180 | 1991-01-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2047635A1 true CA2047635A1 (en) | 1992-01-31 |
CA2047635C CA2047635C (en) | 2003-09-30 |
Family
ID=27072167
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA 2047635 Expired - Lifetime CA2047635C (en) | 1990-07-30 | 1991-07-23 | Two-component aqueous polyurethane dispersions |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA2047635C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5723518A (en) * | 1994-06-03 | 1998-03-03 | Bayer Aktiengesellschaft | Aqueous two-component polyurethane coating compositions and a method for their preparation |
US5741849A (en) * | 1995-06-26 | 1998-04-21 | Bayer Aktiengesellschaft | Aqueous binder compositions having a long processing time and their use in coating compositions |
CN111868131A (en) * | 2018-03-23 | 2020-10-30 | 科思创德国股份有限公司 | Uretdione-containing polyurethane dispersions containing hydrophilic groups |
-
1991
- 1991-07-23 CA CA 2047635 patent/CA2047635C/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5723518A (en) * | 1994-06-03 | 1998-03-03 | Bayer Aktiengesellschaft | Aqueous two-component polyurethane coating compositions and a method for their preparation |
US5741849A (en) * | 1995-06-26 | 1998-04-21 | Bayer Aktiengesellschaft | Aqueous binder compositions having a long processing time and their use in coating compositions |
CN111868131A (en) * | 2018-03-23 | 2020-10-30 | 科思创德国股份有限公司 | Uretdione-containing polyurethane dispersions containing hydrophilic groups |
Also Published As
Publication number | Publication date |
---|---|
CA2047635C (en) | 2003-09-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |