Traffic paint method and composition

Abstract

Ambient drying traffic paint compositions and methods for their applicaton are disclosed comprising a resin binder and pigment(s) in a three-component or four-component solvent system, in parts by weight of: solvent boiling point: 190°-141° F.; 5-11 solvent boiling point: 140°-106° F.; 12-17 solvent boiling point: 105°-90° F.; 2-.[.28.]. .Iadd.28.99 .Iaddend. solvent boiling point greater than 225° F. 0-12 The disclosed compositions are applied at ambient temperatures without the use of external heating means and a relatively fast dry time of about 20 to 60 seconds is obtained.

What is claimed is: 
     
       1. A method of applying a rapid drying marking composition comprising applying at ambient temperature a traffic paint composition onto a roadway surface, the traffic paint composition, expressed in weight percentage containing:   ______________________________________                                    
resin binder           16-22                                              
pigments(s)            47-48                                              
pigment volume                                                            
concentration (PVC)    46-59                                              
solvent system:                                                           
boiling point 190-141° F.                                          
                        5-11                                              
boiling point 140-106° F.                                          
                       12-17                                              
boiling point 105-90° F.                                           
                       2-.[.28.]..Iadd.28.99.Iaddend.                     
boiling point greater                                                     
than 225° F.     0-12                                              
solids content         67.5-75.5                                          
______________________________________                                    
     and allowing the thus applied paint composition to dry to a track-free state at ambient temperature in a period of 60 seconds or less.   
     
     
       2. The method of claim 1 wherein said resin binder is a medium oil alkyd resin, a short oil alkyd resin, an oil modified polyurethane resin or mixtures thereof. 
     
     
       3. The method of claim 1 wherein said resin binder consists essentially of an alkyd resin, having a polyfunctional alcohol phthalate resin content of 45-75% and an oil content of 55-25%, in combination with chlorinated rubber. 
     
     
       4. The method of claim 3 wherein a majority of the solvent is methylene chloride. 
     
     
       5. The method of claim 3 wherein the resin binder additionally contains a plasticizing amount of chlorinated paraffin. 
     
     
       6. The method of claim 1 wherein reflectorizing glass spheres are applied onto the applied paint composition immediately after disposition onto the roadway surface. 
     
     
       7. The method of claim 1 wherein the traffic paint composition also contains reflectorizing glass spheres. 
     
     
       8. An ambient drying traffic paint composition for application onto a roadway surface comprising, by weight .Iadd.percentage.Iaddend.:   ______________________________________                                    
resin binder           16-22                                              
pigments(s)            47-48                                              
pigment volume                                                            
concentration (PVC)    46-59                                              
solvent system:                                                           
boiling point 190-141° F.                                          
                        5-11                                              
boiling point 140-106° F.                                          
                       12-17                                              
boiling point 105-90° F.                                           
                       2-.[.28.]..Iadd.28.99.Iaddend.                     
boiling point greater                                                     
than 225° F.     0-12                                              
solids content         67.5-75.5                                          
______________________________________                                    
     wherein said resin binder is (1) medium oil alkyd resin, (2) a short oil alkyd resin, (3) an oil modified polyurethane resin, or mixtures thereof, or (4) a mixture of an alkyd resin in combination with chlorinated rubber, said composition, when applied onto a roadway surface, capable of drying to a track-free state at ambient temperatures in a period of 60 seconds or less.     
     
     
       9. The ambient drying traffic paint composition according to claim 8 wherein the alkyd resin has a polyfunctional alcohol phthalate resin content of 45-75% and an oil content of 55-25%. 
     
     
       10. The ambient drying traffic paint composition according to claim 8 wherein a majority of the solvent is methylene chloride. 
     
     
       11. The ambient drying traffic paint composition according to claim 8 wherein the resin binder also includes a plasticizing amount of chlorinated paraffin. 
     
     
       12. The ambient drying traffic paint composition according to claim 11 wherein the alkyd resin is present in an amount of 5-8%, the chlorinated rubber is present in an amount of 8-10% and the chlorinated paraffin is present in an amount of 6-8% of the total formulation. 
     
     
       13. The ambient drying traffic paint composition according to claim 8 further including reflectorizing glass spheres. 
     
     
       14. An ambient drying paint composition for application onto a roadway surface comprising, by weight: a resin binder, 16-22%, including an alkyd resin, an oil-modified polyurethane resin, or their mixture, and a chlorinated rubber, the ratio of alkyd resin to chlorinated rubber in the range of 1:3 to 3:1, together with a plasticizing amount of a chlorinated paraffin;   a solids content of 67.5 to 75.5, including said resin binder, pigments, fillers and extenders, and a liquid content making up the balance;   said liquid content including a solvent system of solvents having a:   boiling point of 190°-141° F., 5-11%   boiling point of 140°-106° F., 12-17%   boiling point of 105°-90° F., 2-28%   boiling point of greater than 225° F., 0-12% which includes methylene chloride, the composition drying rapidly at ambient temperatures in a period of about 20-60 seconds, when applied onto a roadway surface.     
     
     
       15. A paint composition defined by claim 14 wherein the weight proportions of ingredients are as follows:   ______________________________________                                    
alkyd resin binder 5-8                                                    
chlorinated rubber  8-10                                                  
chlorinated paraffin                                                      
plasticizer        6-8                                                    
pigments           47-49                                                  
methylene chloride solvent                                                
                   .[.28-31.]..Iadd.28-28.99.Iaddend.                     
solids content     67.5-75.5                                              
______________________________________                                    
     
     
     
       16. An ambient drying paint composition comprising .Iadd.in percentage .Iaddend.by weight:   ______________________________________                                    
resin binder           16-22                                              
pigments(s)            47-48                                              
pigment volume                                                            
concentration (PVC)    46-59                                              
solvent system:                                                           
boiling point 190-141° F.                                          
                        5-11                                              
boiling point 140-106° F.                                          
                       12-17                                              
boiling point 105-90° F.                                           
                       2-.[.28.]..Iadd.28.99.Iaddend.                     
boiling point greater                                                     
than 225° F.     0-12                                              
solids content         67.5-75.5                                          
______________________________________                                    
     wherein said resin binder is (1) a medium oil alkyd resin, (2) a short oil alkyd resin, (3) an oil modified polyurethane resin, or mixtures of or (4) a mixture of an alkyd resin in combination with chlorinated rubber, said composition, when applied, capable of drying to a track-free state at ambient temperatures in a period of 60 seconds or less.