Detail of "15171-48-9"

Reference

Fire retardant effect of 2-methyl-1,2-oxaphospholan-5-one 2-oxide in the PPO/HIPS blend

Fire retardant effect of 2-methyl-1,2-oxaphospholan-5-one 2-oxide in the PPO/HIPS blend. Balabanovich, A. I.; Levchik, G. F.; Yang, J. H. (Research Institute for Physical Chemical Problems, Belarussian State University, Minsk 220050, Belarus). Journal of Fire Sciences, 20(6), 519-530 (English) 2002 Sage Publications Ltd. CODEN: JFSCDV. ISSN: 0734-9041. DOCUMENT TYPE: Journal CA Section: 37 (Plastics Manufacture and Processing) A phosphorus-rich compd. 2-methyl-1,2-oxaphospholan-5-one 2-oxide (OP) (Clariant, Germany), and poly(2,6-dimethylphenylene oxide) (PPO) were mixed with high impact polystyrene (HIPS). The combustion behavior of the formulations was studied by limiting oxygen index (LOI) and Underwriters Labs. UL94 test. The mechanism of the fire-retardant action of the additives was studied by thermogravimetry, IR characterization of the solid residues and high boiling degrdn. products (HBPs) and GC/MS characterization of the HBPs. OP was found to improve fire retardant performance of the PPO/HIPS blend providing the UL94 V-0 rating. Upon pyrolysis, it evaps. and forms phosphorus-contg.In this experiment, several chemicals are used like 25134-01-4 and 15171-48-9 volatiles. Thermogravimetry and FT-IR provide evidence of an interaction between PPO and OP. The synergistic fire retardant effect is mostly attributed to the condensed and vapor-phase activity of OP and condensed-phase effect of PPO. .

Continuous manufacture of 2,5-dioxo-1-oxa-2-phospholanes

Continuous manufacture of 2,5-dioxo-1-oxa-2-phospholanes. Ohorodnik, Alexander; Lohmar, Elmar; Gehrmann, Klaus; Stutzke, Paul (Hoechst A.-G., Ger. 15171-48-9 and 15090-24-1 are also occured in this study.). Ger. DE 2531238 28 Oct 1976, 5 pp. (German). (Germany). CODEN: GWXXAW. CLASS: IC: C07F009-28. APPLICATION: DE 75-2531238 12 Jul 1975. DOCUMENT TYPE: Patent CA Section: 27 (Heterocyclic Compounds (One Hetero Atom)) 1,2-Oxaphospholanes (I; R = Me, Ph) are prepd. by cyclocondensation of Ac2O with ClCOCH2CH2P(O)ClR while preheating the reactants to 70-120.degree.. Thus, reaction of Ac2O with ClCOCH2CH2P(O)ClMe in circulating I (R = Me), preheated to 100-10.degree., gives 99% I (R = Me) of 98% purity. .