Patent ID: 7955472
Filing Date: 2011-06-07
Classification: A61L,C04B,E04B,E04C,E04F,Y10T

Abstract:
1. A method of modifying an interior structure of an existing building comprising: applying a gypsum board on a surface of the interior structure, the gypsum board comprising a gypsum core containing a gypsum and a base paper for gypsum board covering the gypsum core, the base paper for gypsum board being a base paper for gypsum board having air permeability, at least one kind of hydrazide compound being compounded in at least one of the gypsum core and the base paper for gypsum board, a molecule of the at least one kind of hydrazide compound having at least one hydrazide group, and a content of the at least one kind of hydrazide compound being 0.01 part by weight or more and 10 parts by weight or less per 100 parts by weight of the gypsum.