Detail of "46728-75-0"

Reference

Modified polycaproamides

Modified polycaproamides. (Teijin Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 58141211 A2 22 Aug 1983 Showa, 3 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C08G069-16. APPLICATION: JP 82-22779 17 Feb 1982. DOCUMENT TYPE: Patent CA Section: 35 (Chemistry of Synthetic High Polymers) Section cross-reference(s): 41 Polycaproamide [25038-54-4] dyeable with cationic dyes is manufd. by melt-polymg. e-caprolactam (I) and a sulfonic acid metal salt in the presence of a small amt. of KOH, wherein at least the post-polymn. is conducted under diminished pressure. Thus, a mixt. of I 2264, g 5-(lithiosulfo)isophthalic acid [46728-75-0] 22, KOH 1.12, and water 3.6 g in an autoclave was heated 4 h at 260°. After releasing the autoclave pressure to 1 atm during 30 min, the pressure was reduced to 50 torr during 20 min, and the post-polymn. was conducted at 260°. After 3.5 h, [h] = 1.20 was reached. Polymns. at the usual pressure or in the absence of KOH required longer times (4.8-6.0 h) to reach [h] = 1.Except for chemicals metioned above, 1310-58-3 and 25038-54-4 are also used.20. .