Reference

Hollow synthetic yarn anion exchangers

Hollow synthetic yarn anion exchangers. (Nippon Oil Seal Industry Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 58180535 A2 22 Oct 1983 Showa, 6 pp. 75-50-3 and 25135-51-7 are cas registry numbers. These chemicals are also mentioned in this article. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C08J005-20; B01J047-12. APPLICATION: JP 82-63333 16 Apr 1982. DOCUMENT TYPE: Patent CA Section: 40 (Textiles) Anion-exchanging hollow synthetic fibers for semipermeable membranes are prepd. by coating the fibers with a polymer contg. aminable groups and then aminating the polymer with an amine. Thus, a liquor contg. 15% arom. polyamide was spun through a ring-shaped spinneret into a coagulating bath. The spun fibers were treated with 5% soln. of chloromethylated polystyrene for 10 min, dried, and aminated with aq. 50% N,N,N',N'-tetramethyl-1,6-hexanediamine [111-18-2] for 15 h at 15° to give anion-exchanging yarns with high semipermeation efficiency. .

Rigid urethane foam

Rigid urethane foam. (Toshiba Corp., Japan). Jpn. Kokai Tokkyo Koho JP 58145736 A2 30 Aug 1983 Showa, 5 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C08J009-02. APPLICATION: JP 82-26763 23 Feb 1982. DOCUMENT TYPE: Patent CA Section: 38 (Plastics Fabrication and Uses) The foams are produced by reaction between an isocyanate portion with added Sn-type catalyst and a polyol portion with added catalyst, foam controller, and foaming agent. The foams have small pore size and low heat conduction. 75-69-4 and 3030-47-5 which are cas registry numbers are also used here. Thus, the polyol portion contained polyol LV 470 100, foam -controller L 5340 2, tetramethylhexamethylenediamine [111-18-2] 0.8, pentamethyldiethylenetriamine [3030-47-5] 0.3, and Cl3CF [75-69-4] (foaming agent) 45-55 parts, and the isocyanate portion contained polyisocyanate MDI-TR50BX 100 and dibutyltin dilaurate [77-58-7] 0.1-0.3 part. The portions were blended to make the NCO index value 1.15, and the rigid foam had pore size 0.22 mm, heat conductance 0.0144 kcal/m-h-°C, and d. 24.1 kg/m3. .