Low application temperature hot melt adhesive

Abstract

A low application temperature hot met adhesive composition and its use in carton, case or tray formation comprising from about 5 to about 60 weight percent ethylene vinyl acetate with about 30 to about 50 weight percent VA content and having a melt index of about 700 to about 4,000 dg/min; a tackifier; and wax with a melting point of about 125 to about 180° F.

1 . A hot melt adhesive composition comprising, by weight of the hot melt adhesive composition, 
 a) about 5 weight percent to about 60 weight percent of an ethylene-vinyl acetate copolymer having a vinyl acetate content of about 40 weight percent to 50 weight percent and a melt index of about 700 to 4,000 dg/min;    b) about 5 weight percent to about 60 weight percent of a tackifier; and    c) about 15 weight percent to about 55 weight percent of a wax with a melting point of about 125° F. to 180° F.    
   
   
       2 . The adhesive of  claim 1  wherein the tackifier b) is selected from the group consisting of terpene, terpene phenolic, modified terpene, and combinations thereof.  
   
   
       3 . The adhesive of  claim 3  comprising about 30 to about 60 weight percent of said tackifier.  
   
   
       4 . The adhesive of  claim 3  wherein the ethylene-vinyl acetate copolymer comprises about 40 weight percent to about 45 weight percent vinyl acetate.  
   
   
       5 . The adhesive of  claim 4  which comprises about 35 weight percent to about 45 weight percent of an ethylene-vinyl acetate copolymer.  
   
   
       6 . The adhesive of  claim 4  which comprises about 30 weight percent to about 60 weight percent of a terpene phenolic tackifier.  
   
   
       7 . The adhesive of  claim 6  which comprises about 30 weight percent a terpene phenolic tackifier.  
   
   
       8 . The adhesive of  claim 1  wherein the ethylene-vinyl acetate copolymer comprises about 40 weight percent vinyl acetate.  
   
   
       9 . The adhesive of  claim 1  wherein the wax is paraffin wax or synthetic wax.  
   
   
       10 . The adhesive of  claim 2  additionally comprising up to about 5 weight percent of at least one additional tackifier selected from the group consisting of rosin, rosin derivatives, rosin ester, aliphatic hydrocarbons, aromatic hydrocarbons, aromatically modified aliphatic hydrocarbons and mixtures thereof.  
   
   
       11 . The adhesive of  claim 1  comprising 
 a) about 35 weight percent of an ethylene-vinyl acetate copolymer with about 40 weight percent vinyl acetate and having a melt index of about 1,000 dg/min;    b) about 30 weight percent of a tackifier; and    c) about 30 weight percent of a wax with a melting point of about 150° F.    
   
   
       12 . The adhesive of  claim 11  wherein said tackifier is selected from the group consisting of terpene, terpene phenolic, modified terpenes, and combinations thereof.  
   
   
       13 . The adhesive of  claim 12  further comprising about 5 weight percent of at least one additional tackifier.  
   
   
       14 . A carton, case or tray formed utilizing the adhesive of  claim 1 .  
   
   
       15 . A hot melt adhesive composition consisting essentially of, by weight of the hot melt adhesive composition, 
 a) about 5 weight percent to about 60 weight percent of an ethylene-vinyl acetate copolymer having a vinyl acetate content of about 40 weight percent to about 50 weight percent and a melt index of about 700 to 4,000 dg/min;    b) about 5 weight percent to about 60 weight percent of a tackifier selected from the group consisting of terpene, terpene phenolic, modified terpene, and combinations thereof;    c) up to about 5 weight percent of at least one additional tackifier selected from the group consisting of rosin, rosin derivatives, rosin ester, aliphatic hydrocarbons, aromatic hydrocarbons, aromatically modified aliphatic hydrocarbons and mixtures thereof;    c) about 15 weight percent to about 55 weight percent of a wax with a melting point of about 125° F. to 180° F.; and    d) an optional stabilizer.    
   
   
       16 . The adhesive of  claim 15  wherein said tackifier b) is a terpene phenolic tackifier.  
   
   
       17 . The adhesive of  claim 16  wherein said ethylene-vinyl acetate is present in amounts of about 35 weight percent to about 45 weight percent.  
   
   
       18 . The adhesive of  claim 15  comprising about 35 weight percent of an ethylene-vinyl acetate copolymer having a vinyl acetate content of about 40 weight percent, about 30 weight percent of a said tackifier b), and about 30 weight percent of said wax.  
   
   
       19 . The adhesive of  claim 18  comprising a terpene phenolic tackifier.  
   
   
       20 . A carton, case or tray formed utilizing the adhesive of  claim 15.