| 摘要 |
<p>Method for preparing polyamide-12 powder (A) by anionic polymerization of lauryl lactam (I) dissolved in a solvent in which (A) is insoluble. Method for preparing polyamide-12 powder (A) by anionic polymerization of lauryl lactam (I) dissolved in a solvent in which (A) is insoluble. Polymerization is done in presence of (a) a catalyst or activator (II); (b) a finely divided organic or inorganic filler (III), at not over 1.5 g per kg of (I), and (c) amide R1NHCOR2 (IV), at 0.001-0.03 mole per kg (I). R1 : aryl, alkyl, cycloalkyl, R3CONH or R3O; R2 and R3 : alkyl, aryl or cycloalkyl .</p> |
