Patent ID: 9278889
Filing Date: 2016-03-08
CPC Classification: C04B,E21D

Claim Text:
1. A method for providing a reinforcing coating on an irregular rock or concrete surface, the method comprising: a) applying a curable foam composition onto at least a portion of a surface, wherein the surface is selected from a group consisting of an irregular rock surface and an irregular concrete surface and combinations thereof, and wherein the curable foam composition comprises a mixture of a foam composition polyisocyanate component and a foam composition polyol component; b) at least partially curing the curable foam composition to form a polyurethane foam layer, wherein at least a portion of the foam layer is adhered to the surface; c) applying a curable reinforcing composition onto at least a portion of the foam layer, wherein the curable reinforcing composition comprises a reinforcing composition polyisocyanate component and a reinforcing composition polyamine component, wherein the reinforcing composition polyisocyanate component has an isocyanate number in a range from 27% to 32%, the curable reinforcing composition further comprising at least one of a flow agent or a de-aeration agent; d) at least partially curing the curable reinforcing composition to form a polyurea reinforcing layer, wherein at least a portion of the reinforcing layer is adhered to the foam layer, thereby forming the reinforcing coating on the surface.