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US 2026/0077569 A1Published application
Scavenger technology for reducing emissions in gypsum panels
AssigneeGeorgia-Pacific Gypsum LLC
InventorSudhanshu Srivastava
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Abstract
Gypsum panels exhibiting decreased formaldehyde emissions, both during and after manufacturing, are disclosed. The gypsum panels comprise a formaldehyde scavenger in at least the slate coat layer. The gypsum panels may optionally comprise a formaldehyde scavenger in one or more other components of the gypsum panel, such as the gypsum core, a face layer, and/or a coating on or in a layer.
Claims23
1-92. (canceled)
A gypsum panel, said panel comprising:
- i) a first face layer;
- ii) a second face layer;
- iii) a gypsum core layer, interposed between the first face layer and the second face layer;
- and
- iv) a first slate coat layer, interposed between the gypsum core layer and the first face layer;
- wherein at least one slate coat layer comprises urea.
3 more elements
A method of making a gypsum panel, comprising:
- i) providing a slate coat slurry comprising stucco, water, and urea;
- ii) providing a face layer;
- and
- iii) setting the slate coat slurry on the face layer to form a slate coat layer of the gypsum panel.
1 more element
Dependencies are inferred from the claim text.