Low odor, light color, disposable article construction adhesive

Abstract

We have found a novel spray-on adhesive composition made from components including a high melt index polymer and a high melt tackifier that interact to produce a composition that can form a low odor, light color, non-tacky, hot melt adhesive material that can be used in disposable article manufacture. The adhesive is thermally stable at hot melt application conditions, is low in cost, is easily applied and produces high quality disposable articles.

1 - 42 . (Cancelled)  
     
     
         43 . A hot melt adhesive composition comprising: 
 (a) greater than about 40 wt % of an ethylene comonomer copolymer composition, the comonomer comprising vinyl acetate, an acrylic ester, a methacrylic ester or mixtures thereof, the polymer composition having a melt index greater than 1000; and    (b) an effective amount of a hydrogenated hydrocarbon tackifying resin with a softening point greater than 120° C.;    wherein the weight ratio of the polymer composition to the resin is greater than about 1:1.    
     
     
         44 . The composition of  claim 43  wherein the tackifying resin has a softening point of less than about 125° C. and the adhesive has a softening point of less than about 95° C.  
     
     
         45 . The composition of  claim 43  wherein the polymer composition comprises an ethylene-acrylic polymer.  
     
     
         46 . The composition of  claim 43  wherein ethylene acrylic polymer comprises an ethylene/methacrylate copolymer, an ethylene/n-butyl acrylate copolymer or mixtures thereof.  
     
     
         47 . A hot melt adhesive composition comprising: 
 (a) greater than about 40 wt % of an ethylene vinyl acetate polymer composition having a melt index greater than 1000 gm-10 min −1 ; and    (b) an effective amount of a hydrogenated hydrocarbon tackifying resin with a softening point greater than 125° C.;    wherein the weight ratio of the EVA polymer to the resin is greater than about 1:1.    
     
     
         48 . The composition of  claim 47  wherein the adhesive has a softening point of less than about 95° C.  
     
     
         49 . The composition of  claim 47  wherein the polymer composition has a melt index greater than 2000 gm-10 min −1  and the adhesive has a softening point of less than about 85° C.  
     
     
         50 . The composition of  claim 47  wherein the weight ratio is greater than 1.5:1.  
     
     
         51 . The composition of  claim 47  wherein the weight ratio is greater than 1.8:1.  
     
     
         52 . The composition of  claim 47  wherein the tackifying resin has a softening point of less than about 125° C.  
     
     
         53 . The adhesive of  claim 47  wherein the ethylene vinyl acetate polymer composition comprises a first polymer having about 15 to 22 wt % vinyl acetate and a second polymer having about 23 to 28 wt % vinyl acetate, and the resin comprises about 20 to 40 wt % of the adhesive.  
     
     
         54 . The adhesive of  claim 47  wherein the ethylene vinyl acetate polymer has a vinyl acetate content of about 25 to 35 wt % vinyl acetate and the ethylene vinyl acetate polymer is present in the adhesive at a weight ratio polymer to resin of at least 2:1.  
     
     
         55 . The adhesive of  claim 47  wherein the ethylene vinyl acetate copolymer is present in an amount of at least about 60 wt %.  
     
     
         56 . The adhesive of  claim 55  wherein the ethylene vinyl acetate polymer has a melt index greater than 2700 gm-10 min −1 .  
     
     
         57 . The adhesive of  claim 55  wherein the resin is present in the adhesive in an amount of 20 to 40 wt %.  
     
     
         58 . The adhesive of  claim 47  wherein the ethylene vinyl acetate polymer comprises a blend of a first EVA and a second EVA wherein the first EVA has a MI different than the second EVA.  
     
     
         59 . The adhesive of  claim 47  wherein the adhesive consists essentially of 42 to 85 wt % of an ethylene vinyl acetate polymer having a melt index of about 2650 to 3000 gm-10 min −1  and about 30 to 50 wt % of a hydrogenated hydrocarbon tackifying resin with a softening point greater than about 125° C.; wherein the weight ratio of the EVA polymer to the resin is greater than about 1:1 and the adhesive has a softening point of less than about 95° C.  
     
     
         60 . The adhesive of  claim 47  wherein the adhesive has a viscosity of 2000 cPs to 105 cPs at 150° C. and the adhesive has a softening point less than 85° C.  
     
     
         61 . The adhesive of  claim 47  wherein the adhesive has a viscosity of 4300 cPs to 7300 cPs at 150° C.  
     
     
         62 - 103 . (Cancelled)