Patent ID: 6648965
Filing Date: 2003-11-18
Classification: C04B,Y02W,Y10S

Abstract:
A structural component of a fire door comprising the press-molded set product of an aqueous mixture comprising:a) based on the total weight of dry ingredients, 1) about 60 to about 80 wt. % of calcined gypsum; 2) about 3 to about 12 wt. % of expanded perlite fines; 3) about 1.5 to about 7.5 wt. % of fibrous material; 4) about 4 to about 10 wt. % of an organic binder; and 5) about 3 to about 18 wt. % of shrinkage reduction agent; and b) water in a quantity sufficient to form a damp mixture.