Coating system for sag resistant formaldehyde-free fibrous...

Details Coating system for sag resistant formaldehyde-free fibrous... Coating system for sag resistant formaldehyde-free fibrous...

2005-08-23

2010-12-14

Sample, David R (Department: 1783)

Stock material or miscellaneous articles

Structurally defined web or sheet

Physical dimension specified

C428S212000, C525S054100

Reexamination Certificate

active

07851052

ABSTRACT:
A coating system on a fibrous substrate, such as a fibrous ceiling panel, having a first surface and a second surface. A first coating is disposed on the first surface of the substrate and includes a first binder and a first filler material. A second coating may be disposed on the second surface of the substrate. The second coating includes a second binder and a second filler material. The first coating and the second coating expand at different rates in the presence of humidity in order to help prevent sagging of the substrate in presence of humidity. The first coating is preferably a hydrophobic coating having a large particle size, high elastic modulus filler material. The second coating is preferably a hydrophilic coating having a lower concentration of high elastic modulus material and a polymer having a hydrophilic moiety.

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