Pavement marking comprising modified isocyanate
Composition useful for pavement markings comprising a binder and material selected from the group of fillers, extenders, pigments and combinations thereof; and retroreflective elements. The binder comprising a first component comprising the reaction product of an excess of at least one polyisocyanate and at least one hydroxy group-containing material, and a second component comprising at least one polyamine.
1. A pavement marking composition comprising:
a binder comprising
a first component comprising the reaction product of an excess of at least one polyisocyanate and at least one hydroxyl group-containing material that comprises at least 6 carbon atoms for each oxygen atom, and
a second component comprising at least one polyamine;
material selected from the group of fillers, extenders, pigments and combinations thereof and retroreflective elements.
2. The pavement marking composition of claim 1 wherein the hydroxyl group-containing material is a polyester polyol prepared from the group consisting of dimer acid, dimer diol, and mixtures thereof.
3. The pavement marking composition of claim 2 wherein the hydroxyl group-containing material is a diol.
4. The pavement marking composition of claim 1 wherein the hydroxyl group-containing material comprises a number average molecular weight of at least 300 g/mole.
5. The pavement marking composition of claim 1 wherein the hydroxyl group-containing material comprises about 5 wt-% to about 50 wt-% of the first component.
6. The pavement marking composition of claim 1 wherein the polyisocyanate comprises isocyanurate groups.
7. The pavement marking composition of claim 1 wherein the polyamine is a secondary amine.
8. The pavement marking composition of claim 1 wherein the polyamine is an aspartic ester amine.
9. The pavement marking composition of claim 1 wherein the first component and second component are reacted at a stoichiometric ratio of about 1:1.
10. The pavement marking composition of claim 1 wherein the binder comprises at least about 5 wt-% of material selected from the group of fillers, extenders, pigments.
11. The pavement marking composition of claim 10 wherein the binder comprises at least about 15 wt-% of material selected from the group of fillers, extenders, pigments.
12. The pavement marking of composition claim 10 wherein the binder comprises at least about 30 wt-% of material selected from the group of fillers, extenders, pigments.
13. The pavement marking of claim 10 wherein the composition comprises at least about 45 wt-% of material selected from the group consisting of fillers, extenders, pigments.
14. The pavement marking composition of claim 1 wherein the filler comprises hollow glass microspheres.
15. The pavement marking composition of claim 10 wherein the binder exhibits a shrinkage of less than 5%.
16. The pavement marking composition of claim 10 wherein the binder exhibits good adhesion to oil contaminated surfaces.
17. The pavement marking composition of claim 1 wherein the retroreflective elements comprise ceramic microspheres, ceramic reflective elements, and combinations thereof.
18. The pavement marking composition of claim 1 wherein the marking is substantially free of volatile organic components.
19. A traffic-bearing surface comprising the cured pavement marking composition of claim 1 .
20. A preformed pavement marking tape comprising a substrate and the cured pavement marking composition of claim 1 .
21. A method of marking a traffic-bearing surface comprising:
providing a two-component binder comprising
a first component comprising the reaction product of an excess of at least one polyisocyanate and at least one hydroxy group-containing material that comprises at least 6 carbon atoms for each oxygen atom, and
a second component comprising at least one polyamine, wherein at least one component comprises material selected from the group of fillers, extenders, pigments and combinations thereof;
combining the first component and second component of the binder; and
applying the binder onto a traffic bearing surface.
22. The method of claim 21 further comprising applying retroreflective elements to the binder.
23. The method of claim 21 wherein the binder is applied by spraying.
24. A coating composition comprising:
a binder comprising
a first component comprising the reaction product of an excess of at least one polyisocyanate and at least one hydroxy group-containing material that comprises at least 6 carbon atoms for each oxygen atom, and
a second component comprising at least one polyamine;
and about 15 wt-% to about 45 wt-% of material selected from the group of fillers, extenders, pigments and combinations thereof.
25. The coating composition of claim 24 wherein the composition comprises retroreflective elements.