Fire retardant product for use with electrical cables and the like

A fire protective insulating product adapted to be placed about conduits, electrical cables, and cable trays, comprising a first blanket layer containing glass fibers and a coating bonded to said first layer along the interface with said first layer being a composition containing about 3 to about 75 weight percent of high temperature resistant noncombustible fibers, about 1.5 to about 20 weight percent of organically bound halogen selected from the group consisting of halogenated hydrocarbons, tetrabromophthalic anhydride, tris-B-chloroethyl phosphate, chlorinated biphenyl, chlorinated terphenyl and mixtures thereof, about 5 to about 75 weight percent of a resinous binder selected from the group consisting of polyvinyl acetate emulsion, GRS rubber, natural rubber latex, methacrylate and acrylate resins and copolymers thereof, elastomeric polyurethanes, polyvinyl chloride, polyvinylidene chloride, polyvinyl chloride and polyvinylidene chloride copolymers, vinylacetate and vinyl chloride copolymers, polyvinylacetate and ethylene copolymers, water emulsified epoxy resins, polystyrene and acrylontrile-butadiene-styrene polymers, and about 1.0 to about 20 weight percent of an antimony containing compound, said fire protective insulating product having a minimum thickness of said blanket of approximately 1/2 inch.

A fire resistant construction comprising a conduit, electrical cable or cable tray covered by a first layer containing an inorganic non-combustible glass fiber blanket and a coating bonded to said first layer along the interface with said first layer being a composition comprising about 1.5 to about 20 weight percent of organically bound halogen, about 3 to about 75 weight percent high temperature resistant non-combustible figers and about 5 to 75 weight percent of a resinous binder selected from the group consisting of natural rubber and synthetic organic resinous binders, said inorganic non-combustible glass fibers having a temperature resistance substantially less than the high temperature resistant non-combustible fibers of said coating, and said fire resistance construction having a minimum thickness of said glass fiber blanket of approximately 1/2 inch.

A fire protective insulating product comprising a first layer containing an insulative inorganic molded fiberglass part and a coating bonded to said molded fiberglass part along the interface therewith being a composition comprising about 1.5 to about 20 weight percent of organically bound halogen, about 3 to about 75 weight percent of high temperature resistant non-combustible fibers, and about 5 to about 75 weight percent of a resinous binder selected from the group consisting of natural rubber and synthetic organic resinous binders, said fiberglass of said molded fiberglass part having a temperature resistance substantially less than the high temperature resistance substantially less than the high temperature resistant non-combustible fibers of said coating, and said fire protective insulating product having a minimum thickness of fiberglass of approximately 1/2 inch.