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Abrasion resistant coating for stacks of fiber cement siding

  • US 7,238,391 B2
  • Filed: 11/01/2001
  • Issued: 07/03/2007
  • Est. Priority Date: 11/01/2000
  • Status: Expired due to Term
First Claim
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1. A method of making a fiberboard cement siding product, comprising:

  • providing a fiberboard cement substrate,coating a first major surface of the fiberboard cement substrate with a sealer;

    coating the exposed surface of the sealer with a primer;

    coating the exposed surface of the primer with a decorative coating;

    coating the exposed surface of the decorative coating with a topcoat layer comprising a polyurethane dispersion; and

    curing the topcoat layer to provide a mar and abrasion resistant coated fiberboard cement siding product;

    wherein the curing step comprises a thermal curing process that does not expose the siding to a board surface temperature in excess of 100°

    C.;

    wherein the fiberboard cement substrate has a density of at least 1 g/cm3 and comprises wood pulp, silica and cement, and the outer topcoat layer has a dry thickness of at least 8 microns.

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