Durable Debris and Alkaline Resistant Preformed Thermoplastic Runway Pavement Marking Compositions

Abstract

Disclosed are PP/PE copolymer backbone based pre-manufactured thermoplastic airport signage compositions primarily applied in relatively large sections onto airport runways, taxiways, and additional paved surfaces. The composition provides alkali resistant formulations comprising at least 6 weight percent PE/PP, 20 weight percent binder resin with between 5 and 15 weight percent of a tackifier resin, between 2 and 12 weight percent titanium dioxide with an optional organic dye, wherein the intermix is at least 30 weight percent of the composition and wherein the intermix is an inorganic filler that greatly reduce or eliminate debris resistance when compared to other polymer backbone compositions.

1 - 33 . (canceled) 
     
     
         34 . A preformed or hot applied thermoplastic marking composition comprising:
 at least 6 weight percent polypropylene/polyethylene copolymer;   at least 20 weight percent binder;   at least 30 percent intermix; and   at least one of the following:
 at least 1 weight percent of a polyethylene homopolymer wax along with at least 1 weight percent of a non-polar polyethylene component containing 3 percent ethylene maleic anhydride yielding a saponification number of 35, 
 at least 1 weight percent alkyd resin and soybean oil mixtures, 
 at least 0.5 weight percent of a UV stabilizing compound, 
 at least 1 weight percent of an alkyd resin modified glyceryl phthalate, 
 at least 1 weight percent of a polyurethane with a melting point of at least 150 degrees Centigrade. 
   
     
     
         35 . The composition of  claim 34  wherein said composition has a glass transition temperature of 35 degrees Centigrade. 
     
     
         36 . The composition of  claim 34 , wherein the intermix is at least 60 weight percent of said total composition. 
     
     
         37 . The composition of  claim 34 , wherein the intermix comprises at least 30 weight percent glass beads.