MULTI-FUNCTIONAL COATING SYSTEM FOR CEMENTITIOUS COMPOSITE MATERIALS

摘要

Improved coating formulations for cementitious composite building materials are disclosed herein. The coating formulations provide both sealer and primer functions, particularly for substrates in a high alkaline environment, such as fiber cement composite materials. The coating formulations can be applied in a cost-effective single step; exhibit improved adhesion, blocking resistance, water resistance characteristics

主权项

1. A multi-functional coating formulation for cementitious composite materials, comprising:
up to 80% by weight of a polymer binder, wherein the polymer binder comprises at least one emulsion, each emulsion containing at least one reactive functional group; up to 35% by weight of at least one functional pigment, wherein the at least one functional pigment comprises an inorganic compound having an average particle size of 12 microns (urn) or less and an oil absorption of 17 or less; wherein the coating formulation has a pigment volume concentration of about 40% or less; and wherein the coating formulation functions as a sealer and a primer on a cementitious substrate.