Abstract: There is provided an improved thermoplastic hot-melt composition for use in holding a workpiece, e.g. a jet engine airfoil or blade. The composition comprises a filled, normally solid resinous material which is a blend of a dimeric fatty acid containing 32 to 40 carbon atoms, a C.sub.5 -C.sub.6 alkylene hydrocarbon polymer, and a nonpolar aromatic hydrocarbon polymer, said blend having dispersed therein a finely divided inorganic filler material, particularly a ceramic oxide. A method of potting a workpiece with such a composition is also disclosed. The organic portion is novel and useful not only in composing the present potting compositions, but also in forming encapsulating compositions.

Abstract: There is provided an improved thermoplastic hot-melt composition for use in encapsulating a workpiece, e.g. a jet engine airfoil or blade. The composition comprises a filled, normally solid resinous material which contains as an organic moiety, a blend of a dimeric fatty acid containing from 32 to 40 carbon atoms, a C.sub.5 -C.sub.6 alkylene hydrocarbon polymer, and a nonpolar aromatic hydrocarbon polymer, said blend having dispersed therein a minor amount of an alkyl cellulose ether. A method of encapsulating a workpiece with such a composition is also disclosed.

Abstract: Thermoplastic resinoid hot melt compositions which find particular utility in the field of fixturing matrices and as pattern materials for producing investment casting molds. The hot melt compositions include, as an essential ingredient, the reaction product of a methylolurea with at least one fatty acid containing from 12 to 20 carbon atoms per molecule.