Method of Applying a Waterproof Coating

Abstract

A method of applying a waterproof coating comprises providing a resin solution and an accelerator solution, and further utilizing a spray system for applying the coating, the spray system including a spray gun having first and second nozzles, a first pump fluidly connected between the first nozzle and a resin solution reservoir for delivering the resin solution to the first nozzle at a first fluid pressure, and a second pump fluidly connected between the second nozzle and an accelerator solution reservoir for delivering the accelerator solution to the second nozzle at a second fluid pressure different from the first pressure. The accelerator solution may be aerated by a source of compressed air prior to discharge from the second nozzle.

I claim: 
     
         1 . A method of applying a coating to a surface, comprising:
 a) providing a spray gun with first and second nozzles;   b) discharging a resin solution from the first nozzle at a first fluid pressure;   c) aerating an accelerator solution with compressed air;   d) discharging the accelerator solution from the second nozzle at a second fluid pressure;   e) combining the discharged resin solution with the discharged accelerator solution before application to the surface; and   f) substantially curing the combined resin and accelerator solutions before application to the surface.   
     
     
         2 . The method according to  claim 1  wherein the first fluid pressure is greater than the second fluid pressure and wherein the first fluid pressure is below 400 psi. 
     
     
         3 . The method according to  claim 1  wherein the step of substantially curing includes curing the combined resin and accelerator solutions to about 80 percent before application to the surface. 
     
     
         4 . The method according to  claim 1  wherein said resin solution comprises a solution of neoprene latex and liquid asphalt emulsion and wherein said accelerator solution includes citric acid. 
     
     
         5 . The method according to  claim 1  wherein:
 a) said resin solution comprises a water-based liquid neoprene latex combined with a water-based liquid asphalt emulsion; and 
 b) said accelerator promotes coagulation of the resin solution, the accelerator solution comprising citric acid. 
 
     
     
         6 . The method according to  claim 5  wherein upon combination of the resin solution and the accelerator solution, a substantially immediate cure occurs, wherein the combination has the ability to stretch 1500%. 
     
     
         7 . The method according to  claim 5  wherein the water-based liquid neoprene latex to water-based liquid asphalt emulsion weight ratio is 1:1. 
     
     
         8 . The method according to  claim 5  wherein the accelerator solution comprises no zinc sulfate. 
     
     
         9 . The two-part, water-based liquid coating of  claim 1  wherein combination of the resin solution and the accelerator solution by atomization is effective to cure approximately 80% of the resulting coating in a 3 second time period. 
     
     
         10 . A method of applying a coating to a surface, comprising:
 a) providing a spray gun with first and second nozzles;   b) discharging from the first nozzle at a first fluid pressure a resin solution comprising water, a liquid neoprene latex, and a liquid asphalt emulsion;   c) discharging from the second nozzle at a second fluid pressure an accelerator solution effective to promote coagulation of the resin solution, the accelerator solution comprising citric acid, wherein upon said combining, a substantially immediate cure of the coating occurs and wherein the coating has the ability to stretch 1500%.   
     
     
         11 . The method of  claim 10  further comprising aerating the accelerator solution with compressed air. 
     
     
         12 . The method of  claim 10  further comprising combining the discharged resin solution with the discharged accelerator solution before application to the surface. 
     
     
         13 . A method of applying a coating to a surface, comprising:
 a) providing a spray gun with first and second nozzles, wherein the first and second nozzles are angled toward each other;   b) discharging a resin solution from the first nozzle at a first fluid pressure;   c) discharging an accelerator solution from the second nozzle at a second fluid pressure;   d) combining the discharged resin solution with the discharged accelerator solution at a predetermined distance from the nozzles and before application to the surface; and   e) substantially curing the combined resin and accelerator solutions before application to the surface.   
     
     
         14 . The method according to  claim 13  wherein said resin solution comprises a solution of neoprene latex and liquid asphalt emulsion and wherein said accelerator solution includes citric acid. 
     
     
         15 . The method of applying a coating to a surface according to  claim 14  wherein the weight ratio of liquid latex to asphalt emulsion is 1:1. 
     
     
         16 . The method of applying a coating to a surface according to  claim 15  wherein the resin solution has a high pH value and the accelerator solution has a low pH value so that the resin solution immediately coagulates when combined with the accelerator solution. 
     
     
         17 . The method of applying a coating to a surface according to  claim 13  wherein the viscosity of the resin solution is in the range of about 30 to 50 centipoises. 
     
     
         18 . The method of applying a coating to a surface according to  claim 13  wherein the first fluid pressure is greater than the second fluid pressure. 
     
     
         19 . The method of applying a coating to a surface according to  claim 13  wherein the spray gun further includes an integrator valve assembly fluidly connected to the second nozzle and a compressed air source for combining the accelerator solution with compressed air before discharging the accelerator solution out of the second nozzle.