Spread of fire prevention for fire-resistant sealant

摘要

PROBLEM TO BE SOLVED: To obtain the subject sealing material capable of improving workability of the dismantling of an opening part when extending an electric wire and performing reexecution and preventing scattering of a refractory filler, by adding a pitch, an alkali silicic acid compound, etc., in a specific ratio to a liquid polymer. ;SOLUTION: This material comprises (A) 100 pts.wt. of a liquid polymer, (B) ≥5 pts.wt. of a pitch, (C) 10-200 pts.wt. of an alkali silicic acid compound (e.g. sodium metasilicate), (D) 1-50 pts.wt. of heatresistant fibers (e.g. glass fibers) and (E) 10-20 pts.wt. of an inorganic filler. Preferably, the component A is an acrylonitrile butadiene rubber or a polychloroprene and the component E is a metal hydroxide such as aluminum hydroxide.;COPYRIGHT: (C)1998,JPO