Reference

Storage-stable epoxy resins

Storage-stable epoxy resins. (Westinghouse Electric Corp., USA). Japan. Kokai JP 51095498 21 Aug 1976 Showa, 10 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C08G059-68. PRIORITY: US 75-540184 10 Jan 1975. DOCUMENT TYPE: Patent CA Section: 36 (Plastics Manufacture and Processing) A storage-stable epoxy resin contg. a glycol diglycidyl ether and a titanate catalyst is prepd. Thus, a mixt. of Araldite 6005 [25068-38-6] 70, neopentyl glycol diglycidyl ether [17557-23-2] 30, and tetrabutyl titanate [5593-70-4] 5.0 parts was stirred to give a storage-stable resin compn.

Porous hollow bodies containing semipermeable membranes, for reverse osmosis

Porous hollow bodies containing semipermeable membranes, for reverse osmosis. Meier, Joseph Francis; Smith, James David Blackhall (Union Carbide Corp., USA). Ger. Offen. DE 2701820 21 Jul 1977, 31 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: B01D013-00. PRIORITY: US 76-650357 19 Jan 1976. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Fabrication and Uses) Section cross-reference(s): 60, 61 Supports for reverse osmosis membranes having high dry bursting strength are prepd. from 40-500 m fillers coated with 1-18% mixt. of liq. epoxy resin 1, liq. anhydride curing agent 0.75-1.55, diepoxide diluent 0.25-0.95 parts and quaternary N, P, or As salt catalysts. Thus, a mixt. of dry, white, 300-m sand 2550, bisphenol A-epichlorohydrin copolymer [25068-38-6] (epoxy equiv. 172-6, viscosity 4000-5500 cP at 25°) 50, 1-methyltetrahydrophthalic anhydride 105, neopentyl glycol diglycidyl ether [17557-23-2] 50, and tributylmethylphosphonium di-Me phosphate [20445-88-9] 0.5 g is cured in cylindrical molds (30.5 cm long, 3.8 cm inner diam.) for 8 h at 160° and coated with cellulose acetate on the interior to give supported membranes with wet and dry bursting strength 84 and 355 kg/cm2, resp., and good porosity.