Hydrophilic rubber composition

Abstract

A waterproofing membrane system comprising a mixture of dry rubber granules with dry expansive material granules, the mixture adhered to a membrane in a layer. The rubber particles act to limit expansion of the expansive granules in each layer when the membrane is introduced to a source of moisture. Making an expansive sheet waterproofing system comprises determining a desired waterproofing and expansion need by mixing of the rubber granules with dry expansive granules and applying the mixture as a layer to a substrate having an adhesive coating thereon. The coating resulting in the rubber particles limiting expansion of the expansive granules when exposing the prepared membrane to a source of moisture. The membrane retains flexibility and waterproofing, durability and strength of the membrane is increased.

What is claimed: 
     
         1 . A waterproofing membrane system, the system comprising:
 dry rubber granules;   dry expansive material granules;   an adhesive;   a membrane; and   wherein the dry rubber granules are mixed with the dry expansive material granules to form a mixture, the mixture then applied to the membrane in at least a first layer, such that the rubber particles limit expansion of the expandables in at least the first layer when the membrane is introduced to a source of moisture.   
     
     
         2 . The system of  claim 1  wherein the expansive granules comprise Bentonite clay particles. 
     
     
         3 . The system of  claim 1  wherein the expansive granules comprise super absorbent polymers. 
     
     
         4 . The system of claim wherein the expansive granules comprise both Bentonite clay and super absorbent polymers. 
     
     
         5 . The system of  claim 1  wherein the rubber granules comprise recycled automobile tire rubber. 
     
     
         6 . The system of  claim 1  wherein the substrate backing is flexible. 
     
     
         7 . The system of  claim 1  wherein a first layer of the mixture of the granules and expansive granules is adhered to the membrane by a first adhesive layer and a second layer of the mixture is coated to a second adhesive layer, the second adhesive layer coated on top of the first layer of the mixture. 
     
     
         8 . The system of  claim 1  wherein the rubber granules comprise 25-95% of the mixture of rubber granules, adhesive and expansive material granules by weight. 
     
     
         9 . The system of  claim 1  wherein the substrate is flexible and having an adhesive coated bottom side wherein the mixture of granules and adhesive are coated on a topside of the substrate. 
     
     
         10 . A method of making an expansive sheet waterproofing system, the method comprising:
 determining a selected waterproofing and expansion need;   pulverizing recycled rubber into granules;   drying the rubber granules;   mixing the rubber granules with dry granules of expansive material; and   applying the mixture of rubber granules and expansive materials as a layer sufficient to meet the determined waterproofing and expansion needs to a substrate having an adhesive coating thereon and the rubber particles limiting expansion of the expansive granules in the layer when exposing the membrane to a source of moisture.   
     
     
         11 . The method of  claim 10  wherein the expansive materials comprise Betonite clay. 
     
     
         12 . The method of  claim 10  wherein the expansive materials comprise super absorbent polymers. 
     
     
         13 . The method of  claim 10  wherein the expansive materials comprise a combination of Betonite clay and super absorbent polymers. 
     
     
         14 . The method of  claim 10  wherein the recycled rubber granules comprise recycled automobile tire rubber. 
     
     
         15 . The method of  claim 10  and further adding the coated rubber granules to the expansive granules such that the mixture comprises 25-95% rubber particles by weight.