| 專利摘要 | PURPOSE: To produce a monomer-cast black-colored polyamide resin enabling easy and uniform coloring to black color without inhibiting the polymerization by using a transparent polyvinylidene chloride as the colorant.
CONSTITUTION: A monomer-cast black-colored polyamide resin is produced by carrying out anionic polymerization of substantially anhydrous ω-lactam in the presence of at least anionic polymerization catalyst, anionic polymerization initiator and a colorant. In the above process, a polyvinylidene chloride is used as the colorant.
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