Protective wall structure

Claim 1

A protective wall structure comprising spaced wall elements including an inner wall element and an outer wall element, said outer wall element being metallic and said inner wall element comprising a multi-layer cloth material, rigidifying means formed of a material selected from the group consisting of precipitation hardened stainless steel, mar-aging nickel steels, alloy steels and titanium alloys having a yield strength of at least about 200 ksi, said rigidifying means being positioned between and contacting said wall elements and forming therewith separated interior spaces, said rigidifying means having a truss-like, zig-zag form including angularly shaped segments which are inclined with respect to one another and to said wall elements, and organic polymerizable material occupying said separated interior spaces together with catalyst means enclosed in rupturable casing means, said casing means preventing contact between said polymerizable material and said catalyst means, the environment of said polymerizable material, including such portions of said catalyst means released on a break of a portion of said rupturable casing means by means producing one or more apertures in said wall elements, being pressurized and said polymerizable material and the portions of said catalyst means released from the casing having the property to co-act on contact to produce a sealant forming a pressurized plug of the one or more apertures in said wall elements.