Formulations for sealing foam products

Abstract

A formulation for use as a primer, a first polymeric composition or a second polymeric composition in a process of sealing a foamed rubber product or foamed plastic product, excluding foamed polystyrene products, to provide a continuous flexible, impervious surface. The formulation includes an adhesive polymeric resin. The process includes applying a primer of foam-penetrating viscosity to a surface of a foamed product, such that the primer penetrates partially into the foam cell structure at least partially coating the surface. A liquid first polymeric composition is then applied under pressure onto the primer-treated surface which effects at least partial penetration of the first polymeric composition into the product.

What is claimed is:  
     
         1 . A formulation, when used as a primer, a first polymeric composition or a second polymeric composition in a process of sealing a foamed rubber product or foamed plastic product, excluding foamed polystyrene products, to provide a continuous flexible, impervious surface, which process includes: 
 (iii) applying to a surface of said foamed product a primer of foam-penetrating viscosity, such that the primer penetrates partially into the foam cell structure at least partially coating said surface, and    (iv) applying under pressure a liquid first polymeric composition onto the primer-treated surface which effects at least partial penetration of said first polymeric composition into the product,    wherein said formulation includes an adhesive polymeric resin.    
     
     
         2 . A formulation according to  claim 1  including an adhesive monomeric resin or an adhesive co-polymeric resin or both.  
     
     
         3 . A formulation according to  claim 1  including at least one of the following: chlorinated rubber, rubber based polymeric resins and their derivatives and synthetics, elastomeric polyurethane, elastomeric acrylics and their derivatives including styrene acrylic, silicone and silicone derived resins and vinyl resins.  
     
     
         4 . A formulation according to  claim 1  including a co-polymerised polyvinylchloride (PVC) composition.  
     
     
         5 . A formulation according to  claim 1  including a polyvinylchloride/polyvinylacetate co-polymer.  
     
     
         6 . A formulation according to  claim 1 , having a viscosity such that, when used as a primer, the formulation is adapted to penetrate the product to a depth of between 1 mm and 10 mm below the surface.  
     
     
         7 . A formulation according to  claim 1  wherein the viscosity of the formulation is such that the formulation penetrates the product to a depth of between 2 to 5 mm below the surface.  
     
     
         8 . A formulation, when used as a primer, a first polymeric composition or a second polymeric composition in a process of sealing a foamed rubber product or foamed plastic product, excluding foamed polystyrene products, to provide a continuous flexible, impervious surfaced, which process includes: 
 (iii) applying to a surface of said foamed product a primer of foam-penetrating viscosity, such that the primer penetrates partially into the foam cell structure at least partially coating said surface, and    (iv) applying under pressure a liquid first polymeric composition onto the primer-treated surface which effects at least partial penetration of said first polymeric composition into the product,    wherein the primer and the first polymeric composition are applied by spraying at a pressure of between 30 psi and 80 psi, and said formulation includes an adhesive polymeric resin.    
     
     
         9 . A formulation according to  claim 8  including an adhesive monomeric resin or an adhesive co-polymeric resin or both.  
     
     
         10 . A formulation according to  claim 8  including at least one of the following: chlorinated rubber, rubber based polymeric resins and their derivatives and synthetics, elastomeric polyurethane, elastomeric acrylics and their derivatives including styrene acrylic, silicone and silicone derived resins and vinyl resins.  
     
     
         11 . A formulation according to  claim 8  including a co-polymerised polyvinylchloride (PVC) composition.  
     
     
         12 . A formulation according to  claim 8  including a polyvinylchloride/polyvinylacetate co-polymer.  
     
     
         13 . A formulation according to  claim 8 , having a viscosity such that, when used as a primer, the formulation is adapted to penetrate the product to a depth of between 1 mm and 10 mm below the surface.  
     
     
         14 . A formulation according to  claim 8  wherein the viscosity of the formulation is such that the formulation penetrates the product to a depth of between 2 to 5 mm below the surface.