EP 3 141 535 B1

Gypsum slurry and method for manufacturing a gypsum hardened body

(22) 23.05.2014

(43) 15.03.2017

(45) 04.09.2019

(57) The present invention relates to a gypsum slurry and a method for manufacturing a gypsum hardened body. (…) However, according to the method of enhancing the gypsum core strength of the gypsum wallboard described in Patent Document 1, a specific substituted starch, which is an organic substance, has to be added to the gypsum core as a material of the gypsum wallboard. When an organic substance is added as a material of the gypsum wallboard, non-combustibility of the gypsum wallboard is degraded. As such, the amount of substituted starch that can be added has to be restricted in order to maintain non-combustibility of the gypsum wallboard, and as such, the strength of the gypsum wallboard cannot be adequately enhanced. In this respect, there is a demand for a gypsum hardened body including a strengthening agent that is made of an inorganic material that does not affect the non-combustibility of the gypsum hardened body. The present invention has been conceived in view of the foregoing problems associated with the prior art, and it is an object of the present invention to provide a gypsum hardened body including an inorganic strengthening agent and having a low specific gravity.

(73) Yoshino Gypsum Co., Ltd., Chiyoda-ku, Tokyo 100-0005 (JP)

84) AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

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