C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 28/14 (2006.01) C04B 38/10 (2006.01)
Patent
CA 2498752
Compositions useful for the preparation of lightweight, high strength wallboards, and methods of making same are disclosed. The composition includes a slurry of calcium sulfate hemihydrate (stucco), water, starch, and a foam. The foam acts to provide large bubbles within the core slurry, thereby lightening the weight of the wallboard. The composition and method provide wallboards having lighter weights compared to standard wallboard, increased core strength, and increased paper-to-core bonding.
L'invention porte sur une composition servant à la préparation de panneaux pour cloisons, légers et très résistants, et sur leurs procédés de fabrication. ladite composition consiste en un coulis de sulfate hémihydrate de calcium (stuc), d'eau, d'amidon et de mousse. La mousse produit à l'intérieur du coulis de grosses bulles qui réduisent le poids des panneaux. On a donc des panneaux plus légers et au corps plus résistant que les panneaux usuels et présentant une liaison papier sur corps accrue.
Metz Lambert J.
Sethuraman Gopalakrishnan
Stav Elisha
National Gypsum Properties Llc
Osler Hoskin & Harcourt Llp
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