Multi-component coating method for porous substrates

摘要

The disclosure relates to a coating method including the steps of providing a multi-component coating composition including two or more components, applying each component to a porous substrate, mixing each component with at least one other component thereby causing at least two components to undergo a chemical reaction.

主权项

1. A method of coating a porous fibrous cement substrate, comprising the steps of:
providing a multi-component coating composition comprising: a first component comprising an isocyanate compound, and a second component comprising an amino-functional compound reactive with the isocyanate compound or a hydroxyl-functional compound reactive with the isocyanate compound, wherein each component in the multi-component coating composition is housed in a separate container prior to application to a surface of a porous fibrous cement substrate; applying each of the first and the second component to the surface at a selected application rate for each component, wherein the first component is applied to the surface before the second component is applied to the surface, and wherein the first component penetrates into the surface for a penetration time before applying the second component; removing at least a portion of the first component from the surface after allowing at least some of the first component to penetrate into the surface for the penetration time; allowing the first component and the second component to mix on the surface to form the multi-component coating composition thereon, wherein the first component and the second component undergo a chemical reaction on the surface.