Alkaline hydrolysis resistant adhesive

Abstract

There is described herewith an alkaline hydrolysis resistant carpet adhesive comprising an n-butyl acrylate acrylic polymer.

1 - 15 . (canceled) 
     
     
         16 . A method of positioning a carpet on a surface comprising:
 forming a film of an alkaline hydrolysis resistant carpet adhesive comprising an n-butyl acrylate acrylic polymer on the surface or applying the adhesive to an underside of the carpet, wherein the surface has a pH above 9,   positioning the carpet on the surface; and   allowing the adhesive to cure to thereby form a releasable bond between the carpet and the surface.   
     
     
         17 . The method of  claim 16 , wherein the n-butyl acrylate acrylic polymer is an aqueous dispersion of a thermoplastic acrylic polymer based on n-butylacrylate having a total solids content of about 60% and having a glass transition temperature of about −42° C. 
     
     
         18 . The method of  claim 16 , wherein the adhesive is in an aqueous formulation. 
     
     
         19 . The method of  claim 16 , wherein the n-butyl acrylate acrylic polymer is combined with a crosslinked acrylic polymer. 
     
     
         20 . The method of  claim 19 , wherein the n-butyl acrylate acrylic polymer is combined with an APEO (alkyl phenol ethoxylate) free acid-containing acrylic emulsion copolymer. 
     
     
         21 . The method of  claim 16 , wherein the adhesive has a total solids content in the range of 44 to 46wt %. 
     
     
         22 . The method of  claim 16 , wherein the adhesive further comprises additives selected from fillers, thickeners, defoamers, antimicrobials, fungicides, biocides, pH adjusters/neutralising agents, tackifiers, surfactants, rheology modifiers, wetting agents, polymer blends and mixtures thereof. 
     
     
         23 . The method of  claim 16 , wherein the adhesive has a pH of from 7 to 10. 
     
     
         24 . The method of  claim 16 , wherein the adhesive has a viscosity within the range of 2000 cps to 50000 cps. 
     
     
         25 . The method of  claim 16 , wherein the adhesive has a density of 0.85 to 1.15g/cm 3  at 20° C. 
     
     
         26 . The method of  claim 16 , wherein the surface is concrete or timber. 
     
     
         27 . The method of  claim 16 , wherein the surface includes a sealer or an epoxy coating. 
     
     
         28 . The method of  claim 16 , wherein the surface has a pH above about 10. 
     
     
         29 . The method of  claim 16 , wherein the surface has a moisture content of 5 wt % or above. 
     
     
         30 . The method of  claim 16 , wherein the adhesive is applied to an underside of the carpet and a releasable protective layer is attached to the adhesive which is removed prior to positioning. 
     
     
         31 . The method of  claim 16 , wherein the adhesive has a density of 0.95 to 1.15 g/cm 3  at 20° C.