CA2047635A1 - Two-component aqueous polyurethane dispersions - Google Patents

Two-component aqueous polyurethane dispersions

Info

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
Application number
CA 2047635
Other languages
French (fr)
Other versions
CA2047635C (en
Inventor
Terry A. Potter
Patricia B. Jacobs
Peter H. Markusch
James W. Rosthauser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayer Corp
Original Assignee
Mobay Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mobay Corp filed Critical Mobay Corp
Publication of CA2047635A1 publication Critical patent/CA2047635A1/en
Application granted granted Critical
Publication of CA2047635C publication Critical patent/CA2047635C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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.
CA 2047635 1990-07-30 1991-07-23 Two-component aqueous polyurethane dispersions Expired - Lifetime CA2047635C (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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
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