Bonding adhesive and adhered roofing systems prepared using the same

Abstract

A method is provided for forming an adhered membrane roof system. The method comprises applying a bond adhesive to a substrate on a roof to form an adhesive layer and applying a membrane directly to the adhesive layer. The bond adhesive includes a polymer having a silicon-containing hydrolyzable terminal group.

What is claimed is: 
     
         1 . A method for forming an adhered membrane roof system, the method comprising:
 (i) applying a bond adhesive to a substrate on a roof to form an adhesive layer, where the bond adhesive includes a polymer having a silicon-containing hydrolyzable terminal group and a hydrocarbon tackifier resin devoid of phenolic resin; and   (ii) applying a membrane directly to the adhesive layer.   
     
     
         2 . The method of  claim 1 , where the hydrocarbon tackifier resin is a C 9  aromatic hydrocarbon tackifier resin. 
     
     
         3 . The method of  claim 1 , where the bond adhesive further includes a low VOC-generating moisture scavenger. 
     
     
         4 . The method of  claim 1 , where the bond adhesive further includes a non-phthalate plasticizer. 
     
     
         5 . The method of  claim 1 , where the bond adhesive further includes a low VOC-generating adhesion promoter. 
     
     
         6 . The method of  claim 1 , where the bond adhesive has a dynamic viscosity of less than 13,000 cPs by using a Brookfield viscometer equipped with a #6 spindle operating at room temperature and 10 rpm and a static viscosity of from about 3600 to about 24,000 cPs by using a Brookfield viscometer equipped with a #6 spindle operating at room temperature and 2 rpm. 
     
     
         7 . A method for forming an adhered membrane roof system, the method comprising:
 (i) applying a bond adhesive to a substrate on a roof to form an adhesive layer, where the bond adhesive includes a polymer having a silicon-containing hydrolyzable terminal group, and a low VOC-generating moisture scavenger; and   (ii) applying a membrane directly to the adhesive layer.   
     
     
         8 . The method of  claim 7 , where the bond adhesive further includes a hydrocarbon tackifier resin. 
     
     
         9 . The method of  claim 7 , where the bond adhesive further includes a non-phthalate plasticizer. 
     
     
         10 . The method of  claim 7 , where the bond adhesive further includes a low VOC-generating adhesion promoter. 
     
     
         11 . The method of  claim 7 , where the low VOC-generating moisture scavenger is a silane including at least one organo functional group and at least one hydrolyzable group that, upon hydrolysis, does not generate methanol 
     
     
         12 . A method for forming an adhered membrane roof system, the method comprising:
 (i) applying a bond adhesive to a substrate on a roof to form an adhesive layer, where the bond adhesive includes a polymer having a silicon-containing hydrolyzable terminal group, and a non-phthalate plasticizer; and   (ii) applying a membrane directly to the adhesive layer.   
     
     
         13 . The method of  claim 12 , where the bond adhesive further includes a hydrocarbon tackifier resin. 
     
     
         14 . The method of  claim 12 , where the bond adhesive further includes a low VOC-generating moisture scavenger. 
     
     
         15 . The method of  claim 12 , where the bond adhesive further includes a low VOC-generating adhesion promoter. 
     
     
         16 . The method of  claim 12 , where the nono-phthalate plasticizer is selected from glycol ethers and glycol ether esters.