| 摘要 |
Insulation material capable of providing, for any given thickness thereof, a superior combination of thermal and mechanical damage protection, as well as products incorporating such insulation, are disclosed. The insulation is an intumescent composition made from a particulate mixture of elastomeric polymeric materials, a phenolic or comparable resin, a moisture-liberating substance, and certain other additives, and produces a hard porous char of low thermal conductivity when subjected to elevated temperatures. Although the mixture may be used in granular form, it is preferably combined with an elastic or flexible resinous binder to enable the mixture to be bonded and molded to the shape required for its use. Depending on the particular application involved, the insulation may be used with or without additional protective facings. A representative product utilizing a layer of such insulation between metal facings is a container construction designed for the shipment of hazardous materials such as radioactive wastes, the construction being characterized by an inner steel drum within an outer steel drum and having the space between the drums filled with the insulation.
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