Polyolefin adhesive compositions for elastic applications

Abstract

The present invention is related to an article comprising a substrate, having at least one propylene terpolymer comprising propylene derived units, one or more dienes, and an alpha-olefin content of less than about 35 wt % of the propylene terpolymer; and an adhesive composition, having about 20 to about 80 wt % of a polymer blend comprising a first propylene-based polymer, that is a homopolymer of propylene or a copolymer of propylene and ethylene or a C4 to C10 alpha-olefin, and a second propylene-based polymer, that is a homopolymer of propylene or a copolymer of propylene and ethylene or a C4 to C10 alpha-olefin; wherein the second propylene-based polymer is different than the first propylene-based polymer; and wherein the adhesive composition is applied to the substrate at temperature of less than about 150° C.

We claim: 
     
         1 . An article comprising
 (a) a substrate, comprising   at least one propylene terpolymer comprising propylene derived units, one or more dienes, and one or more C 2  or C 4  to C 20  alpha-olefins, where the C 2  or C 4  to C 20  alpha-olefin content is less than about 35 wt % of the propylene terpolymer; and   (b) an adhesive composition, comprising   a polymer blend comprising a first propylene-based polymer, wherein the first propylene-based polymer is a homopolymer of propylene or a copolymer of propylene and ethylene or a C 4  to C 10  alpha-olefin, and a second propylene-based polymer, wherein the second propylene-based polymer is a homopolymer of propylene or a copolymer of propylene and ethylene or a C 4  to C 10  alpha-olefin; wherein the second propylene-based polymer is different than the first propylene-based polymer, and wherein the polymer blend is present in the amount of about 20 to about 80 wt % of the adhesive composition;   wherein the adhesive composition is applied to the substrate at temperature of less than about 150° C.   
     
     
         2 . The article of  claim 1 , wherein the substrate further comprises one or more secondary elastomeric components, one or more polyolefinic thermoplastic resins, or at least one of each. 
     
     
         3 .- 15 . (canceled) 
     
     
         16 . A method of applying an adhesive composition to a substrate, wherein the method comprises the steps of :
 (a) preparing a substrate, comprising
 at least one propylene terpolymer comprising propylene derived units, one or more dienes, and one or more C 2  or C 4  to C 20  alpha-olefins, where the C 2  or C 4  to C 20  alpha-olefin content is less than about 35 wt % of the propylene terpolymer; and 
   (b) applying an adhesive composition to the substrate at a temperature of less than about 150° C.,   wherein the adhesive composition comprises a polymer blend comprising a first propylene-based polymer, wherein the first propylene-based polymer is a homopolymer of propylene or a copolymer of propylene and ethylene or a C 4  to C 10  alpha-olefin, and a second propylene-based polymer, wherein the second propylene-based polymer is a homopolymer of propylene or a copolymer of propylene and ethylene or a C 4  to C 10  alpha-olefin; wherein the second propylene-based polymer is different than the first propylene-based polymer, and wherein the polymer blend is present in the amount of about 20 to about 80 wt % of the adhesive composition.   
     
     
         17 . The method of  claim 16 , wherein the polymer blend has a melt flow rate of greater than about 1,000 g/10 min to less than about 10,000 g/10 min. 
     
     
         18 . The method of  claim 16 , wherein the propylene terpolymer of the substrate comprises of from about 0.2 to about 4 wt % 5-ethylidene-2-norbornene (ENB) based on the propylene terpolymer. 
     
     
         19 . The method of  claim 16 , wherein the substrate is a film or fabric. 
     
     
         20 . An article produced by the method according to  claim 16 .