Polyurethane coating systems
View Patent ↗The present invention relates to novel one-component polyurethane systems including one or more organic and/or inorganic compounds of vanadium in which the vanadium has an oxidation state of at least +4, to their preparation and use for preparing paints, inks and adhesives.
1. Aqueous, one-component baking systems comprising a blocked polyisocyanate, a polymer having isocyanate-reactive groups, water and one or more organic and/or inorganic compounds of vanadium in which the vanadium has an oxidation state of at least +4.
2. The systems according to claim 1 , wherein the vanadium compounds comprise a member selected from the group consisting of ammonium, lithium, sodium and potassium vanadate, lithium, sodium and potassium orthovanadate, magnesium vanadate, calcium vanadate, vanadyl(IV) acetylacetonate (VO(C 5 H 7 O 5 ) 2 ), vanadyl bistetramethylheptadionate VO(TMHD) 2 and vanadic acid.
3. The systems according to claim 1 , wherein the vanadium compounds comprise a member selected from the group consisting of lithium vanadate Li 3 VO 4 , sodium vanadate Na 3 VO 4 , potassium vanadate K 3 VO 4 , lithium metavanadate LiVO 3 , sodium metavanadate NaVO 3 and potassium metavanadate KVO 3 .
4. The systems according to claim 1 , wherein the vanadium compounds comprise lithium or sodium vanadate.
5. The systems according to claim 1 wherein the systems comprise
(a) one or more blocked polyisocyanates,
(b) one or more polymers having polyisocyanate-reactive groups,
(c) one or more organic and/or inorganic compounds of vanadium in which the vanadium has an oxidation state of at least +4,
(d) water and optionally one or more organic solvents or solvent mixtures and
(e) optionally further additives and auxiliaries,
the amounts of (a)+(b) being from 20 to 89.9 parts by weight, (c) from 0.01 to 5 parts by weight, (d) from 10 to 70 parts by weight and (e) from 0 to 10 parts by weight and the sum of the parts by weight of components (a) to (e) being 100, based on the weight of components (a) to (e).
6. The systems according to claim 5 , wherein blocked polyisocyanates (a) comprise one or more aliphatic isocyanates.
7. The systems according to claim 5 , wherein blocked polyisocyanates (a) comprise one or more aromatic isocyanates.
8. The systems according to claim 5 , wherein blocked polyisocyanates (a) comprise hexamethylene diisocyanate, isophorone diisocyanate, 4,4′-diisocyanatodicyclohexylmethane, their derivatives and/or mixtures.
9. The systems according to claim 5 , wherein the polyisocyanates (a) are hydrophilic.
10. The systems according to claim 5 , wherein component (c) comprises one or more salts of vanadic acid or condensation products thereof.
11. The systems according to claim 5 , wherein component (c) comprises lithium, sodium or potassium ortho- or metavanadate.
12. A process for preparing the systems according to claim 5 , comprising introducing component (c) into components (a) and/or (b) prior to the dispersing or dissolution thereof in component (d).
13. A process for preparing the systems according to claim 5 , comprising introducing component (c) into component (d) prior to the dispersing or dissolution of component (a) and/or (b) in the same.
14. A process for preparing an aqueous or water-dispersible system according to claim 5 , comprising adding component (c) to one or more of components (a), (b), (d) and/or (e) before adding a dispersing quantity of water.
15. A method for preparing paints, inks and adhesives comprising adding one or more additives selected from the group consisting of pigments, fillers, levelling agents, defoamers, and catalysts other than (c) to the systems according to claim 5 .
16. The systems according to claim 2 wherein the systems comprise
(a) one or more blocked polyisocyanates,
(b) one or more polymers having polyisocyanate-reactive groups,
(c) one or more organic and/or inorganic compounds of vanadium in which the vanadium has an oxidation state of at least +4,
(d) water and optionally one or more organic solvents or solvent mixtures and
(e) optionally further additives and auxiliaries,
the amounts of (a)+(b) being from 20 to 89.9 parts by weight, (c) from 0.01 to 5 parts by weight, (d) from 10 to 70 parts by weight and (e) from 0 to 10 parts by weight and the sum of the parts by weight of components (a) to (e) being 100, based on the weight of components (a) to (e).
17. The systems according to claim 3 wherein the systems comprise
(a) one or more blocked polyisocyanates,
(b) one or more polymers having polyisocyanate-reactive groups,
(c) one or more organic and/or inorganic compounds of vanadium in which the vanadium has an oxidation state of at feast +4,
(d) water and optionally one or more organic solvents or solvent mixtures and
(e) optionally further additives and auxiliaries,
the amounts of (a)+(b) being from 20 to 89.9 parts by weight, (c) from 0.01 to 5 parts by weight, (d) from 10 to 70 parts by weight and (e) from 0 to 10 parts by weight and the sum of the parts by weight of components (a) to (e) being 100, based on the weight of components (a) to (e).
18. The systems according to claim 4 wherein the systems comprise
(a) one or more blocked polyisocyanates,
(b) one or more polymers having polyisocyanate-reactive groups,
(c) one or more organic and/or inorganic compounds of vanadium in which the vanadium has an oxidation state of at least +4,
(d) water and optionally one or more organic solvents or solvent mixtures and
(e) optionally further additives and auxiliaries,
the amounts of (a)+(b) being from 20 to 89.9 parts by weight, (c) from 0.01 to 5 parts by weight, (d) from 10 to 70 parts by weight and (e) from 0 to 10 parts by weight and the sum of the parts by weight of components (a) to (e) being 100, based on the weight of components (a) to (e).