Roofing shingles provided with release coating

Abstract

A roofing shingle and a method of manufacturing a roofing shingle wherein the bottom surface of said shingle is provided with a release coating of a continuous film of particles having poor interlaminar strength due to the particles having good to perfect basal cleavage. The release coating significantly eases separation of roofing shingles that stick together when stacked during storage and transit in warm environments.

1 . A roofing shingle comprising a top and bottom surface, the bottom surface provided with a release coating of a continuous film of particles having good to perfect basal cleavage.  
     
     
         2 . A shingle in accordance with  claim 1  wherein said release coating is disposed on the pressure point portions of said bottom surface.  
     
     
         3 . A shingle in accordance with  claim 1  wherein said roofing shingle is a shingle selected from the group consisting of a laminated shingle and a strip shingle.  
     
     
         4 . A shingle in accordance with  claim 3  wherein said particles are in the class phyllosilicates.  
     
     
         5 . A shingle in accordance with  claim 4  wherein said particles are selected from the group consisting of Allophane, Apophyllite, Bannisterite, Carletonite, Cavansite, Chrysocolla, Baileychlore, Chamosite, Chlorite, Clinochlore, Cookeite, Nimite, Pennantite, Penninite, Sudioite, Glauconite, Illite, Kaolinite, Montmorillonite, Palygorskite, Pyrophyllite, Sauconite, Talc, Vermiculite, Delhayelite, Elpidite, Fedorite, Franklinfumaceite, Franklinphilite, Gonyerite, Gyolite and Leucosphenite; Biotite, Lepidolite, Muscovite, Paragonite, Phlogopite, Zinnwaldite, Minehillite, Nordite, Pentagonite, Petalite, Prehnite, Rhodesite, Sanfomite, Antigorite, Clinochrysotile, Lizardite, Orthochrysotile, Serpentine, Wickenburgite, Zeophyllite.  
     
     
         6 . A stack of roofing shingles comprising a plurality of said roofing shingles of  claim 1  wherein the top surface of each roofing shingle faces the bottom surface of its adjoining roofing shingle.  
     
     
         7 . A stack of roofing shingles comprising a plurality of said roofing shingles of  claim 2  wherein the top surface of each roofing shingle faces the bottom surface of its adjoining roofing shingle.  
     
     
         8 . A stack of roofing shingles comprising a plurality of said roofing shingles of  claim 3  wherein the top surface of each roofing shingle faces the bottom surface of its adjoining roofing shingle.  
     
     
         9 . A stack of roofing shingles comprising a plurality of said roofing shingles of  claim 4  wherein the top surface of each roofing shingle faces the bottom surface of its adjoining roofing shingle.  
     
     
         10 . A stack of roofing shingles comprising a plurality of said roofing shingles of  claim 5  wherein the top surface of each roofing shingle faces the bottom surface of its adjoining roofing shingle.  
     
     
         11 . A method of manufacturing a roofing shingle comprising applying a release coating of a continuous film of particles having good to perfect basal cleavage to a bottom portion of a shingle.  
     
     
         12 . A method of manufacturing a roofing shingle in accordance with  claim 11  wherein said release coating is applied on pressure point portions of said bottom surface.  
     
     
         13 . A method of manufacturing a roofing shingle in accordance with  claim 11  wherein said particles are suspended in a water based suspension.  
     
     
         14 . A method of manufacturing a roofing shingle in accordance with  claim 13  wherein said water based suspension is sprayed onto the shingle.  
     
     
         15 . A method of manufacturing a roofing shingle in accordance with  claim 13  wherein said water based suspension is brushed onto the shingle.  
     
     
         16 . A method of manufacturing a roofing shingle in accordance with  claim 13  wherein said water based suspension is wiped onto the shingle.  
     
     
         17 . A method of manufacturing a roofing shingle in accordance with  claim 11  wherein said particles are selected from the group consisting of Allophane, Apophyllite, Bannisterite, Carletonite, Cavansite, Chrysocolla, Baileychlore, Chamosite, Chlorite, Clinochlore, Cookeite, Nimite, Pennantite, Penninite, Sudioite, Glauconite, Illite, Kaolinite, Montmorillonite, Palygorskite, Pyrophyllite, Sauconite, Talc, Vermiculite, Delhayelite, Elpidite, Fedorite, Franklinfurnaceite, Franklinphilite, Gonyerite, Gyolite and Leucosphenite; Biotite, Lepidolite, Muscovite, Paragonite, Phlogopite, Zinnwaldite, Minehillite, Nordite, Pentagonite, Petalite, Prehnite, Rhodesite, Sanfornite, Antigorite, Clinochrysotile, Lizardite, Orthochrysotile, Serpentine, Wickenburgite, Zeophyllite.  
     
     
         18 . A method of manufacturing a roofing shingle in accordance with  claim 11  wherein the release coating is applied to a self seal adhesive portion on the bottom portion of the shingle.