| abstract |
Polymerizable lactam compositions comprising an anionic catalyst, a polymerization promoter, 50 to 90 percent of caprolactam, at least 1 percent of a lactam having seven to 12 carbon atoms in the lactam ring, and 2 to 20 percent of the plasticizer N-alkyl pyrrolidone, and the manufacture of impactresistant articles by casting and anionically polymerizing the mixture. |