Flexible Pavement Markings

Abstract

The present application generally relates to flexible pavement markings, methods of making flexible pavement markings, and compositions of flexible pavement markings.

1 - 24 . (canceled) 
     
     
         25 . A pavement marking composition, comprising:
 an isocyanate-containing component; and   an amine-containing component;   wherein the isocyanate-containing component is at least about 35 weight percent of the composition.   
     
     
         26 . The pavement marking composition of  claim 25 , wherein the amine-containing component has a viscosity that is less than 50 cSt at 38° C. 
     
     
         27 . The pavement making composition of  claim 25 , wherein the amine-containing component is bis(alkylamino)alkyl amine. 
     
     
         28 . The pavement marking composition of  claim 25 , wherein the volume ratio of the isocyanate-containing component to the amine-containing component is about 2:1. 
     
     
         29 . The pavement marking composition of  claim 25 , wherein the stoichiometric ratio of the isocyanate-containing component to the amine-containing component is greater than about 1.2. 
     
     
         30 . The pavement marking composition of  claim 25 , wherein the amine-containing component is a sterically hindered amine. 
     
     
         31 . The pavement marking composition of  claim 25 , wherein the isocyanate-containing component is at least about 35 weight percent of the composition. 
     
     
         32 . The pavement marking composition of  claim 25 , wherein the isocyanate-containing component has an equivalent weight of at least about 300 g/eq. 
     
     
         33 . The pavement marking composition of  claim 25 , wherein the shrinkage of a pavement marking including the pavement marking composition is less than 1.5% 
     
     
         34 . The pavement marking composition of  claim 25 , wherein the pavement marking composition is substantially free of polyaspartic ester amines. 
     
     
         35 . The pavement marking composition of  claim 25 , wherein the isocyanate-containing component includes one or more of isocyanurate groups, uretdione groups, biuret groups, and allophonate groups. 
     
     
         36 . The pavement marking composition of  claim 25 , wherein the isocyanate-containing component includes one or more of hexamethylene diisocyanate, cyclohexane diisocyanate, 1,12-dodecane diisocyanate, 1,4-tetramethylene diisocyanate, isophorone diisocyanate, dicyclomethane diisocyanate, m-phenylene diisocyanate, p-phenylene diisocyanate, polymethylene polyphenylisocyanate, tetraalkyl xylene diisocyanate, toluene diisocyanate, dianisidine diisocyanate, bitolylene diisocyanate, naphthalene-1,4-diisocyanate, diphenylene 4,4′-diisocyanate, xylylene-1,3-diisocyanate, bis(4-isocyanatophenyl)methane, bis(3-methyl-4-isocyanatophenyl)methane, 4,4′-diphenylpropane diisocyanate, and polymeric forms thereof; and an active hydrogen containing material selected from at least one polyol, a high molecular weight polyoxyalkyleneamine or a combination thereof. 
     
     
         37 . The pavement marking composition of  claim 25 , wherein the amine-containing component includes polyoxyalkyleneamine.