Method of applying traffic marking onto an oily road surface and traffic paints formulated therefor

Abstract

A method for applying a traffic marker to road beds consisting of using a traffic paint which contains a polymer having a low molecular weight and a Tg of from −25° C. to 25° C., wherein the polymer is polymerized from a monomer mixture in which from 10% to 99.9%, by weight of the total polymer solids, consists of at least one hydrophobic monomer having a Hansch π value of at least 3.5. The traffic paint of the present invention readily adheres to oily road surfaces.

We claim:  
     
         1 . A method for improving the adhesion of traffic markers on a road surface comprising applying onto said road surface a layer of an aqueous traffic paint comprising a low molecular weight polymer having a Tg of from −25° C. to 25° C., said polymer polymerized from a monomer mixture containing from 10% to 99.9%, by weight, based on the total weight of the polymer solids, of at least one hydrophobic monomer.  
     
     
         2 . The method of  claim 1  wherein when the Tg of the polymer is from −25° C. to 25° C., the hydrophobic monomer content of the polymer is from 10 to 99.9%, by weight, based on the total weight of the polymer.  
     
     
         3 . The method of  claim 2  wherein when the Tg of the polymer is from 5° C. to 25° C., the hydrophobic monomer content of the polymer is from 20 to 99.9%, by weight, based on the total weight of the polymer.  
     
     
         4 . The method of  claim 1  further comprising from 0.1% to 50% by weight, based on the total weight of the polymer, of at least one vinyl aromatic monomer.  
     
     
         5 . The method of  claim 1  further comprising contacting said layer with a drying agent.  
     
     
         6 . A method for improving the adhesion of traffic markers on an oily road surface comprising applying onto said oily road surface a layer of an aqueous traffic paint comprising a low molecular weight polymer having a Tg of from −25° C. to 25° C., said polymer having been polymerized from a monomer mixture containing from 10% to 99.9%, by weight, based on the total weight of the polymer solids, of at least one hydrophobic monomer.  
     
     
         7 . The method of  claim 6  wherein when the Tg of the polymer is from −25° C. to 25° C., the hydrophobic monomer content of the polymer is from 10 to 99.9%, by weight, based on the total weight of the polymer.  
     
     
         8 . The method of  claim 7  wherein when the Tg of the polymer is from 5° C. to 25° C., the hydrophobic content of the polymer is from 20 to 99.9%, by weight, based on the total weight of the polymer.  
     
     
         9 . The method of  claim 6  further comprising from 0.1% to 50%, by weight, based on the total weight of the polymer, of at least one vinyl aromatic monomer.  
     
     
         10 . The method of  claim 6  further comprising contacting said layer with a drying agent.