Shingles with increased hydrophobicity

Abstract

A shingle includes a substrate having an asphalt coating on a top surface of the substrate and on a bottom surface of the substrate. A surface layer of granules is embedded in the asphalt on the top surface of the substrate. A backdust layer of particles is embedded in the asphalt on the bottom surface of the substrate. A sealant is disposed on the backdust. A hydrophobic material is applied to the sealant.

1 . A package, comprising:
 a plurality of stacked shingles, each of the shingles comprising:
 a substrate; 
 an asphalt coating; 
 a plurality of granules; 
 a plurality of particles; and 
 a hydrophobic material; 
 wherein the asphalt coating is disposed on a top surface and a bottom surface of the substrate; 
 wherein the plurality of granules are embedded in the asphalt coating on the top surface of the substrate; 
 wherein the plurality of particles are embedded in the asphalt coating on the bottom surface of the substrate; and 
 wherein the hydrophobic material is disposed on at least one surface of the shingle such that the hydrophobic material prevents moisture from infiltrating between adjacent shingles of the plurality of stacked shingles. 
   
     
     
         2 . The package according to  claim 1 , wherein the hydrophobic material has a thickness that allows at least one of laminating adhesives and sealants to bond to the shingle. 
     
     
         3 . The package according to  claim 1 , wherein the hydrophobic material is thinner than particles of the plurality of particles. 
     
     
         4 . The package according to  claim 1 , wherein the hydrophobic material is about a few monolayers thick. 
     
     
         5 . The package according to  claim 1 , wherein the hydrophobic material extends inward from one or more edges of the shingle on a first surface of the at least one surface of the shingle. 
     
     
         6 . The package according to  claim 5 , wherein the hydrophobic material covers less than half of the first surface of the shingle. 
     
     
         7 . The package according to  claim 1 , wherein the hydrophobic material covers an entirety of a first surface of the at least one surface of the shingle. 
     
     
         8 . The package according to  claim 1 , wherein the hydrophobic material is disposed on a top surface of the shingle. 
     
     
         9 . The package according to  claim 1 , wherein the hydrophobic material is disposed on a bottom surface of the shingle. 
     
     
         10 . The package according to  claim 1 , wherein the hydrophobic material is disposed on the plurality of particles. 
     
     
         11 . The package according to  claim 10 , wherein the hydrophobic material is disposed on the plurality of particles such that a contact angle of the plurality of particles with the hydrophobic material is greater than or equal to about 90 degrees. 
     
     
         12 . The package according to  claim 1 , wherein the hydrophobic material comprises a silane solution. 
     
     
         13 . The package according to  claim 12 , wherein the silane solution is a methyl silane solution. 
     
     
         14 . The package according to  claim 12 , wherein the silane solution has a silane concentration of between about 0.25% and about 2%. 
     
     
         15 . The package according to  claim 12 , wherein between about 0.5 g and about 2 g of silane solution is disposed on the at least one surface of the shingle per square. 
     
     
         16 . The package according to  claim 1 , wherein the hydrophobic material comprises silicone. 
     
     
         17 . The package according to  claim 1 , wherein the hydrophobic material comprises Titanium dioxide. 
     
     
         18 . The package according to  claim 1 , wherein the two or more shingles are stacked such that the hydrophobic material of the shingles prevents moisture from infiltrating between the shingles when the shingles are exposed to 2.2 inches of rain per hour for 24 hours. 
     
     
         19 . The package according to  claim 1 , wherein the asphalt coating comprises a first asphalt coating that is disposed on a top surface of the substrate and a second asphalt coating that is disposed on a bottom surface of the substrate. 
     
     
         20 . The package according to  claim 19 , wherein the first asphalt coating and the second asphalt coating are made of the same material.