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US 6,638,356 B2Granted
Gypsum-based building material
AssigneesKawasaki Kasei Chemicals Ltd., Yoshino Gypsum Co., Ltd.
InventorsYoshiaki Ishibashi, Itaru Yokoyama, Masanobu Seki
Life of this patent
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Abstract
A gypsum-based building material comprising gypsum as the main material and an anthraquinone compound incorporated.
Claims16
A gypsum-based board comprising 0.005 to 5 parts by weight of an anthraquinone compound per 100 parts by weight of gypsum, wherein the amount of anthraquinone compound is sufficient to suppress generation of hydrogen sulfide when the board is contacted with an organic material.
Dependencies are inferred from the claim text.