Coating composition comprising an acetal-functional binder
First Claim
1. A coating composition comprising:
- a) an acetal-functional binder, and b) a thiol-functional cross-linker, wherein the acetal-functional binder is represented by formula II wherein P is a binder backbone, A is oxygen, sulphur or NRVII, wherein RVII is hydrogen or an alkyl group with 1 to 4 carbon atoms, K is a divalent and/or trivalent organic moiety having 1 to 30 carbon atoms, optionally comprising hydrogen, oxygen, nitrogen and/or sulphur atoms, and having one link to the binder backbone when K is divalent and two links to the binder backbone when K is trivalent, and the individual moieties K1 to Km may be the same or different, m is an integer from 1 to 50, n is an integer from 1 to 10, and R and R′
may be the same or different and represent alkyl groups with 1 to 4 carbon atoms.
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Abstract
The invention relates to a coating composition comprising an acetal-functional binder and a thiol-functional cross-linker, wherein the acetal-functional binder is represented by the following formula
wherein P is a binder backbone, K is a divalent and/or trivalent organic moiety having 1 to 30 carbon atoms and having one or two links to the binder backbone, A is selected from oxygen, sulphur, and NRVII, wherein RVII is hydrogen or an alkyl group with 1 to 4 carbon atoms, m is an integer from 1 to 50, n is an integer from 1 to 10, and R and R′ may be the same or different and represent alkyl groups with 1 to 4 carbon atoms. In a further aspect, the invention relates to acetal-functional binders, acetal-functional monomers, a process for the preparation of said monomers, coating compositions comprising said acetal-functional binders, and to a process for the preparation of a coating composition comprising an acetal-functional polyurethane dispersion and a thiol-functional cross-linker.
13 Citations
34 Claims
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1. A coating composition comprising:
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a) an acetal-functional binder, and b) a thiol-functional cross-linker, wherein the acetal-functional binder is represented by formula II wherein P is a binder backbone, A is oxygen, sulphur or NRVII, wherein RVII is hydrogen or an alkyl group with 1 to 4 carbon atoms, K is a divalent and/or trivalent organic moiety having 1 to 30 carbon atoms, optionally comprising hydrogen, oxygen, nitrogen and/or sulphur atoms, and having one link to the binder backbone when K is divalent and two links to the binder backbone when K is trivalent, and the individual moieties K1 to Km may be the same or different, m is an integer from 1 to 50, n is an integer from 1 to 10, and R and R′
may be the same or different and represent alkyl groups with 1 to 4 carbon atoms. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 14, 16, 18, 20, 22, 24, 31)
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- 10. A coating composition comprising an acetal-functional binder, wherein the acetal-functional binder is prepared from acetal-functional intermediates according to formulae Va and/or Vb
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26. An adhesive composition comprising:
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a) an acetal-functional binder, and b) a thiol-functional cross-linker, wherein the acetal-functional binder is represented by formula II wherein P is a binder backbone, K is a divalent and/or trivalent organic moiety having 1 to 30 carbon atoms, optionally comprising hydrogen, oxygen, nitrogen or sulphur atoms, having one link to the binder backbone when K is divalent and two links to the binder backbone when K is trivalent, and the individual moieties K1 to Km may be the same or different, A is oxygen, sulphur or NRVII, wherein RVII is hydrogen or an alkyl group with 1 to 4 carbon atoms, m is an integer from 1 to 50, n is an integer from 1 to 10, and R and R″
may be the same or different and represent alkyl groups with 1 to 4 carbon atoms. - View Dependent Claims (28)
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27. An acetal-functional ethylenically unsaturated polymerizable monomer which is (i) an ethylenically unsaturated monomer represented by the structure of formula VIIIa, (ii) an ethylenically unsaturated monomer represented by the structure of formula VIIIb or (iii) a mixture of the ethylenically unsaturated monomers represented by the structures of formulae VIIIa and VIIIb,
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29. An ethylenically unsaturated monomer obtainable by reacting a hydroxyl-functional aminoacetal derivative according to formulae Va and/or Vb
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30. An acetal-functional binder, wherein it is prepared from acetal-functional intermediates according to formulae Va and/or Vb
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32. A liquid acetal functional binder according to formula X
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33. A process for the preparation of a coating composition comprising an acetal-functional polyurethane dispersion and a thiol-functional cross-linker, wherein an acetal-functional polyurethane dispersion is added, with stirring, to a thiol-functional cross-linker.
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34. A process for the preparation of a coating composition comprising an acetal-functional polyurethane dispersion and a thiol-functional cross-linker, wherein it comprises the steps of
a) mixing an acetal-functional polyurethane binder and a thiol-functional cross-linker in a substantially non-aqueous medium, and b) forming an aqueous dispersion of the mixture.
Specification