Curable aqueous polyurethane dispersions
First Claim
Patent Images
1. A curable aqueous polyurethane dispersion, comprising:
- a) at least one compound having at least two free isocyanate groups, at least one allophanate group and at least one C═
C double bond capable of free radical polymerization, wherein a carbonyl group or an oxygen atom in the form of an ether function is bonded directly to the double bond,b) at least one compound having at least one group reactive toward isocyanate groups and having a C═
C double bond capable of free-radical polymerization,c) optionally at least one compound having at least two groups reactive toward isocyanate groups and selected from the group consisting of hydroxyl, mercapto, primary secondary amino groups, and combinations thereof,d) at least one compound having at least one group reactive toward isocyanate groups and having at least one acid group,e) at least one basic compound for neutralizing or partially neutralizing the acid groups of the compound d),f) optionally at least one compound different from b), d) and e) and having only one group reactive toward isocyanate groups,g) optionally at least one polyisocyanate different from a),h) at least one thermal initiator,i) optionally, one or more further additives selected from the group consisting of reactive diluents, photoinitiators and conventional coating additives, andk) water.
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Abstract
A curable aqueous polyurethane dispersion substantially comprises
- a) at least one compound having two free isocyanate groups, at least one allophanate group and at least one C═C double bond capable of free radical polymerization, a carbonyl group or an oxygen atom in the form of an ether function being bonded directly to the double bond,
- b) at least one compound having at least one group reactive toward isocyanate groups and having a C═C double bond capable of free-radical polymerization,
- c) if required, at least one compound having at least two groups reactive towards isocyanate groups and selected from hydroxyl, mercapto, primary and/or secondary amino groups,
- d) at least one compound having at least one group reactive towards isocyanate groups and having at least one acid group,
- e) at least one basic compound for neutralizing or partially neutralizing the acid groups of the compounds d),
- and a thermal initiator and is used for coating substrates.
20 Citations
18 Claims
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1. A curable aqueous polyurethane dispersion, comprising:
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a) at least one compound having at least two free isocyanate groups, at least one allophanate group and at least one C═
C double bond capable of free radical polymerization, wherein a carbonyl group or an oxygen atom in the form of an ether function is bonded directly to the double bond,b) at least one compound having at least one group reactive toward isocyanate groups and having a C═
C double bond capable of free-radical polymerization,c) optionally at least one compound having at least two groups reactive toward isocyanate groups and selected from the group consisting of hydroxyl, mercapto, primary secondary amino groups, and combinations thereof, d) at least one compound having at least one group reactive toward isocyanate groups and having at least one acid group, e) at least one basic compound for neutralizing or partially neutralizing the acid groups of the compound d), f) optionally at least one compound different from b), d) and e) and having only one group reactive toward isocyanate groups, g) optionally at least one polyisocyanate different from a), h) at least one thermal initiator, i) optionally, one or more further additives selected from the group consisting of reactive diluents, photoinitiators and conventional coating additives, and k) water. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A curable aqueous polyurethane dispersion, comprising:
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a) at least one compound having at least two free isocyanate groups, at least one allophanate group, and at least one C═
C double bond capable of free radical polymerization,a carbonyl group or an oxygen atom in the form of an ether function directly bonded to the double bond, b) at least one compound having at least one group reactive toward isocyanate groups and having a C═
C double bond capable of free-radical polymerization,c) optionally at least one compound having at least two groups reactive toward isocyanate groups and selected from the group consisting of hydroxyl, mercapto, primary secondary amino groups, and combinations thereof, d) at least one compound having at least one group reactive toward isocyanate groups and having at least one acid group, e) at least one basic compound for neutralizing or partially neutralizing the acid groups of the compound d), f) optionally at least one compound different from b), d) and e) and having only one group reactive toward isocyanate groups, g) optionally at least one polyisocyanate different from a), h) at least one thermal initiator, i) optionally, one or more further additives selected from the group consisting of reactive diluents, photoinitiators and conventional coating additives, and k) water.
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Specification