Liquid pavement marking compositions

Abstract

A pavement marking composition, methods of applying, and pavement markings produced therefrom. The composition is a two-part coating composition having an amine component including one or more aspartic ester amines and optionally one or more amine-functional coreactants, an isocyanate component including one or more polyisocyanates, and material selected from the group of fillers, extenders, pigments, and combinations thereof.

1. A pavement marking comprising:
 a binder having polyurea groups, wherein the binder is prepared from a coating composition comprising: 
 one or more aliphatic secondary amines;  
 one or more polyisocyanates;  
 material selected from the group consisting of fillers, extenders, pigments, and combinations thereof; and  
 reflective elements;  
   
       wherein the coating composition has a minimum application temperature of at least about 7° C. 
     
     
       2. A pavement marking comprising:
 a binder having polyurea groups, wherein the binder is prepared from a coating composition comprising: 
 one or more aliphatic secondary amines;  
 one or more polyisocyanates;  
 material selected from the group consisting of fillers, extenders, pigments, and combinations thereof; and  
 reflective elements;  
 
 
       wherein the coating composition has a track-free time of no greater than about 5 minutes. 
     
     
       3. A pavement marking comprising:
 a binder having polyurea groups, wherein the binder is prepared from a coating composition comprising: 
 one or more aliphatic secondary amines;  
 one or more polyisocyanates;  
 material selected from the group consisting of fillers, extenders, pigments, and combinations thereof; and  
 reflective elements;  
 
 
       wherein the pavement marking has an open time of at least 30 seconds and a retained reflectivity of at least 100 mcd/m 2 /lux after at least 2 years in use as longitudinal traffic markings as measured according to ASTM E 1710-95. 
     
     
       4. A pavement marking comprising:
 a binder having polyurea groups, wherein the binder is prepared from a coating composition comprising: 
 one or more aliphatic secondary amines;  
 one or more polyisocyanates;  
 material selected from the group consisting of fillers, extenders, pigments, and combinations thereof; and  
 reflective elements;  
 
 
       wherein the coating has an open time of at least 30 seconds and a minimum application temperature of at least about 7° C. 
     
     
       5. A pavement marking comprising:
 a binder having polyurea groups, wherein the binder is prepared from a coating composition comprising: 
 one or more aliphatic secondary amines;  
 one or more polyisocyanates;  
 material selected from the group consisting of fillers, extenders, pigments, and combinations thereof; and  
 reflective elements;  
 
 
       wherein the coating has an open time of at least 30 seconds and a track-free time of no greater than about 5 minutes. 
     
     
       6. A pavement marking comprising:
 a binder having polyurea groups, wherein the binder is prepared from a coating composition comprising: 
 one or more aliphatic secondary amines;  
 one or more polyisocyanates;  
 material selected from the group consisting of fillers, extenders, pigments, and combinations thereof; and  
 reflective elements;  
 
 
       wherein the coating has a minimum application temperature of at least about 7° C. and a retained reflectivity of at least 100 mcd/m 2 /lux after at least 2 years in use as longitudinal traffic markings as measured according to ASTM E 1710-95. 
     
     
       7. A pavement marking comprising:
 a binder having polyurea groups, wherein the binder is prepared from a coating composition comprising: 
 one or more aliphatic secondary amines;  
 one or more polyisocyanates;  
 material selected from the group consisting of fillers, extenders, pigments, and combinations thereof; and  
 reflective elements;  
 
 
       wherein the coating has a track-free time of no greater than about 5 minutes and a retained reflectivity of at least 100 mcd/m 2 /lux after at least 2 years in use as longitudinal traffic markings as measured according to ASTM E 1710-95. 
     
     
       8. A pavement marking comprising:
 a binder having polyurea groups, wherein the binder is prepared from a coating composition comprising: 
 one or more aliphatic secondary amines comprising an aspartic ester amine;  
 one or more polyisocyanates;  
 material selected from the group consisting of fillers, extenders, pigments, and combinations thereof; and  
 reflective elements;  
 
 
       wherein a retained reflectivity of at least 100 mcd/m 2 /lux after at least 2 years in use as longitudinal traffic markings as measured according to ASTM E 1710-95. 
     
     
       9. A pavement marking comprising:
 a binder having polyurea groups, wherein the binder is prepared from a coating composition comprising 
 one or more aliphatic secondary amines comprising an aspartic ester amine;  
 one or more polyisocyanates;  
 material selected from the group consisting of fillers, extenders, pigments, and combinations thereof; and  
 reflective elements;  
   
       wherein the coating has a minimum application temperature of at least about 7° C. 
     
     
       10. A pavement marking comprising:
 a binder having polyurea groups, wherein the binder is prepared from a coating composition comprising 
 one or more aliphatic secondary amines comprising an aspartic ester amine;  
 one or more polyisocyanates;  
 material selected from the group consisting of fillers, extenders, pigments, and combinations thereof; and  
 reflective elements;  
 
 
       wherein the coating has a track-free time of no greater than about 5 minutes. 
     
     
       11. The pavement marking of  claim 3  wherein the pavement marking has a retained reflectivity of at least about  150  mcd/m 2   /lux.   
     
     
       12. The pavement marking of  claim 6  wherein the pavement marking has a retained reflectivity of at least about  150  mcd/m 2   /lux.   
     
     
       13. The pavement marking of  claim 7  wherein the pavement marking has a retained reflectivity of at least about  150  mcd/m 2   /lux.   
     
     
       14. The pavement marking of  claim 8  wherein the pavement marking has a retained reflectivity of at least about  150  mcd/m 2   /lux.