US 2015/0176211 A1 · AQUEOUS DISPERSIONS FOR USE AS COATINGS WITH VARIABLE WATER VAPOR PERMEANCE RATINGS

Abstract

Certain embodiments described herein are directed articles that include a cellulosic substrate (or a non-cellulosic substrate) and an aqueous dispersion disposed on the substrate. In certain examples, the dispersion is effective to provide a water vapor perm rating of about 2 perms or less at 25% average RH as tested by ASTM D1653, or about 2 perm or less at 25% average RH as tested by ASTM E96, when the dispersion is cured as a coating on the substrate. In some embodiments, the substrate can be (or can be part of) a building substrate such as, for example, kraft paper placed on insulation (e.g., fiberglass insulation) or oriented strand board. In some instances, the aqueous dispersion can include a plant oil macromonomer or a waterborne epoxy resin.

Claims42

Dependent claims

An article comprising:

a substrate selected from the group consisting of cellulosic substrates, non-cellulosic substrates, and combinations thereof;
an aqueous dispersion disposed on the substrate and effective to provide a variable water vapor perm rating as a function of humidity, in which the water vapor perm rating is about 2 perm or less at 25% average RH, as tested by ASTM D1653;
or 2 perm or less at 25% average RH, as tested by ASTM E96, when the aqueous dispersion is cured as a coating on the substrate.

Dependencies are inferred from the claim text.

Aqueous dispersions for use as coatings with variable water vapor permeance ratings

Life of this patent

Aqueous dispersions for use as coatings with variable water vapor permeance ratings

Life of this patent

Abstract

Claims42