Alkali metal borohydride concentrate
AssigneeThiokol Corporation
InventorRobert C. Wade
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Abstract
Alkali metal borohydride concentrates are prepared by dry blending alkali metal borohydride powder with a dry non-reactive plastic resin, melting and extruding the blended mixture to form an encapsulated alkali metal borohydride concentrate, and then chopping the extrusion into pellets. The pellet concentrate may then be blended into other materials.
Claims5
A method of making a cellular article, comprising mixing a solid, substantially inert, and stable borohydride blowing agent concentrate prepared from a dried alkali metal borohydride and a dried inert resinous polymer in which reactive protonic hydrogen atoms are substantially absent;
- said concentrate mixture consisting essentially of from about 0.5% to 20% by weight of said alkali metal borohydride, less than about 0.1% adsorbed water, balance essentially said dry inert resinous polymer with a resinous polymer and an effective amount of an activating agent capable of donating a proton to said alkali metal borohydride so as to hydrolyze said alkali metal borohydride and thereby form a cellular article;
- said hydrolyzing occurring while said resinous polymer is in the molten condition.
Dependencies are inferred from the claim text.