Reference

Synthesis and colloidal-chemical properties of sulfoacetic acid alkyl esters

Synthesis and colloidal-chemical properties of sulfoacetic acid alkyl esters. Levi, S. M.; Kiik, H.; Stepanova, T. K.; Faingol'd, S. I. (USSR). Khim.There are some reagents with their cas registry numbers 1847-58-1 and 29444-28-8 are used in this study. Prom-st. (Moscow), (8), 568-70 (Russian) 1976. CODEN: KPRMAW. DOCUMENT TYPE: Journal CA Section: 46 (Surface Active Agents and Detergents) Section cross-reference(s): 23 Alkyl Na sulfoacetates NaO3SCH2CO2R (I), in which R is a secondary radical with 8-14 carbon atoms and has points of attachment at position 2 60-70, position 3 25-30, and position 4 5-10%, have practically the same surfactant properties, but better soly. in water and higher resistance to hydrolysis, as I in which R is a primary, unbranched alkyl radical. The synthesis of I with the secondary R was carried out by treating com. alkene mixts. with ClCH2CO2H [79-11-8] in presence of p-MeC6H5SO3H at 80-90.degree.. The resulting esters were then treated with Na2SO3 [7757-83-7] in 50% EtOH solns. The surfactant properties of I depended also on the size of R. The best overall properties were obtained with sec-dodecyl Na sulfoacetate [61164-28-1]. .

Flame-resistant polycarbonate compositions

Flame-resistant polycarbonate compositions. Webb, Jimmy Lynn (General Electric Co., USA). Ger. Offen. DE 2631755 3 Feb 1977, 15 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C08L069-00. PRIORITY: US 75-597006 18 Jul 1975. DOCUMENT TYPE: Patent CA Section: 36 (Plastics Manufacture and Processing) Alkali metal and alk. earth metal sulfites, thiosulfates, dithionites, and pyrosulfites are used as fireproofing agents for arom. polycarbonates. Thus, 100 parts bisphenol A polycarbonate [24936-68-3] was mixed with 1 part Na2SO3 [7757-83-7], Na2S2O3 [7772-98-7], Na2S2O4 [7775-14-6], or Na2S2O5 [7681-57-4] and the compn. was pelletized by extruding at 287.degree.. The pellets were molded into test pieces which when tested according to Underwriters Laboratories test no. 94 had a V-II classification (av. extinguishing time .ltoreq.25 s and max burn time after removal of the flame 30 sec). The transparency and Izod impact strength of the polymers were not reduced significantly by addn. of the fireproofing agents.Except for chemicals metioned above, 16731-55-8 and 7772-98-7 are also used. .