Antiblock coating for hot melt adhesives

Abstract

The present invention is directed to an antiblock coating comprised of a composition that contains a dibenzoate ester moiety. The dibenzoate ester compounds, particularly 1,4-CHDM dibenzoate, provide an excellent non-stick coating to hot melt adhesives, thus providing for easier packaging, storage, and processing. In addition, such a coating facilitates recycling of materials to which the hot melt adhesive is applied.

We claim:  
     
         1 . A coated substrate comprising a coating and a substrate, wherein the coating comprises a dibenzoate ester compound.  
     
     
         2 . The coated substrate according to  claim 1 , wherein the coating has a glass transition temperature of above 23° C.  
     
     
         3 . The coated substrate according to  claim 1 , wherein the coating has a glass transition temperature of above 60° C.  
     
     
         4 . The coated substrate according to  claim 1 , wherein the coating has a ring ball softening point of from about 80 to about 140° C.  
     
     
         5 . The coated substrate according to  claim 1 , wherein the coating is 1,4- or 1,3-cyclohexanedimethanol dibenzoate.  
     
     
         6 . The coated substrate according to  claim 1 , wherein 0.5 grams or greater of the coated substrate are soluble or dispersible in 100 ml. of water at room temperature and a neutral pH.  
     
     
         7 . The coated substrate according to  claim 1 , wherein the substrate is a hot melt adhesive composition.  
     
     
         8 . The coated substrate according to  claim 1 , wherein the substrate is a hot melt particulate adhesive composition.  
     
     
         9 . The coated substrate according to  claim 1 , wherein the substrate comprises a branched sulfopolyester.  
     
     
         10 . The coated substrate according to  claim 1 , wherein the substrate comprises one or more dibenzoate ester moieties.  
     
     
         11 . The coated substrate according to  claim 1 , wherein the coating is 1,4- or 1,3-cyclohexanedimethanol dibenzoate, and the substrate is a hot melt particulate adhesive composition.  
     
     
         12 . The coated substrate according to  claim 1 , wherein the coating is 1,4- or 1,3-cyclohexanedimethanol dibenzoate, and the substrate is a branched sulfopolyester.  
     
     
         13 . The coated substrate according to  claim 1 , wherein the coating is 1,4- or 1,3-cyclohexanedimethanol dibenzoate, and the substrate comprises one or more dibenzoate ester moieties.  
     
     
         14 . The coated substrate according to  claim 1 , wherein the coating is 1,4- or 1,3-cyclohexanedimethanol dibenzoate, and the substrate comprises from about 20 to about 80 weight parts of a linear water dispersible polyester and from about 20 to about 80 weight parts of a branched water dispersible polyester.  
     
     
         15 . A process of coating a particulate adhesive composition comprising contacting adhesive particles with a dibenzoate ester compound.  
     
     
         16 . The process according to  claim 15 , wherein the dibenzoate ester is 1,4- or 1,3-cyclohexanedimethanol dibenzoate.  
     
     
         17 . The process according to  claim 15 , wherein the adhesive particles comprise one or more dibenzoate ester moieties.  
     
     
         18 . The process according to  claim 15 , wherein the dibenzoate ester is 1,4- or 1,3-cyclohexanedimethanol dibenzoate, and the adhesive particles comprise a branched sulfopolyester.  
     
     
         19 . A process of providing anti-block properties to a particulate adhesive composition comprising contacting adhesive particles with an antiblocking effective amount of a dibenzoate ester compound.  
     
     
         20 . The process according to  claim 19 , wherein the dibenzoate ester is 1,4- or 1,3-cyclohexanedimethanol dibenzoate, and the adhesive particles comprise a branched sulfopolyester.