METHOD FOR PREPARING POLYCAPROAMIDE Russian patent published in 2004 - IPC

FIELD: organic chemistry, chemical technology. SUBSTANCE: invention describes method for preparing modified polycaproamide by hydrolytic polymerization of ε--caprolactam with the following drying. Modification of polycaproamide as granules or crumbs is carried out at molecular level at drying stage with 3-4% solution of 1,1,5-trihydroperfluoropentanol in acetic acid in consumption of modifying agent 0.035-0.04 wt.-% for 30 min. Invention provides the improvement of physical-chemical properties of granules and threads preparing from them, in particular, to enhance their thermal stability. EFFECT: improved preparing method. 2 cl, 2 tbl, 5 ex