| 摘要 |
A new class of isocyanate-terminated solid, soluble, fusible, storable prepolymers suitable for producing high molecular weight polycarbodiimides; formed from polycarbodiimide-forming polyisocyanate monomers having a melting point below 200 DEG C., said prepolymers comprising a mixture of liner chains of polycarbodiimides and said monomers, said mixture containing about 2 to 95 percent of the original isocyanate nitrogen in the form of polycarbodiimide. The prepolymer can be in admixture with a catalyst and solvent for said catalyst for further formation or polycarbodiimide.
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