Reference

Hybrid fire extinguishers containing solid propellant gas generators and fire suppressants

All Rights Reserved. Hybrid fire extinguishers containing solid propellant gas generators and fire suppressants. Vaughan, Charles E.; Wierenga, Paul H.; Holland, Gary F. ( Aerojet-General Corporation, USA). PCT Int. Appl. WO 2006138733 A2 28 Dec 2006, 26pp. DESIGNATED STATES: W: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN; RW: AT, BE, BF, BJ, CF, CG, CH, CI, CM, CY, DE, DK, ES, FI, FR, GA, GB, GR, IE, IS, IT, LU, MC, ML, MR, NE, NL, PT, SE, SN, TD, TG, TR. (English). (World Intellectual Property Organization). CODEN: PIXXD2. APPLICATION: WO 2006-US23864 19 Jun 2006. PRIORITY: US 2005-691447P 17 Jun 2005. DOCUMENT TYPE: Patent CA Section: 50 (Propellants and Explosives) A hybrid fire extinguisher consists of a fire suppressant within a container and a solid propellant gas generator connected to the container, in which the solid propellant reacts to pressurize the container and propel the fire suppressant at a const. flow rate during the discharge period. Suitable fire suppressants comprise a hydrofluorocarbon, a perfluorocarbon, 1,1,1,2,3,3,3-heptafluoropropane, perfluorobutane, perfluorocyclobutane, HFC-125, HFC-23, HFC-227ea, and HFC-236fa. The solid propellant contains 5-aminotetrazole, bitetrazole, diazoaminotetrazole, diazotetrazole dimer, guanidine nitrate, aminoguanidine nitrate, nitroguanidine, triazole, triaminoguanidinium salts, and diaminoguanidinium salts.In this experiment, several chemicals are used like 354-33-6 and 7758-05-6 Suitable oxidizers include an alkali metal or alk. earth metal nitrate, phase-stabilized ammonium nitrate, perchlorates, iodates, bromates, or strontium nitrate. .

Critical Properties of Four HFE + HFC Binary Systems: Trifluoromethoxymethane (HFE-143m) + Pentafluoroethane (HFC-125), + 1,1,1,2-Tetrafluoroethane (HFC-134a), + 1,1,1,2,3,3,3-Heptafluoropropane (HFC-227ea), and + 1,1,1,2,3,3-Hexafluoropropane (HFC-236ea)

Critical Properties of Four HFE + HFC Binary Systems: Trifluoromethoxymethane (HFE-143m) + Pentafluoroethane (HFC-125), + 1,1,1,2-Tetrafluoroethane (HFC-134a), + 1,1,1,2,3,3,3-Heptafluoropropane (HFC-227ea), and + 1,1,1,2,3,3-Hexafluoropropane (HFC-236ea).Several substances are used for example 811-97-2 and 354-33-6 which are their cas registry numbers. Uchida, Yuko; Yasumoto, Masahiko; Yamada, Yasufu; Ochi, Kenji; Furuya, Takeshi; Otake, Katsuto (College of Science Technology, Nihon University, Tokyo 101-8308, Japan). Journal of Chemical and Engineering Data, 49(6), 1615-1621 (English) 2004 American Chemical Society. CODEN: JCEAAX. ISSN: 0021-9568. DOCUMENT TYPE: Journal CA Section: 68 (Phase Equilibriums, Chemical Equilibriums, and Solutions) Section cross-reference(s): 47 Trifluoromethoxymethane (CF3OCH3, HFE-143m) is a promising alternative for dichlorodifluoromethane (CCl2F2, CFC-12) as a refrigerant. Because of its low flammability, it is expected to be used in binary mixts. with inflammable hydrofluorocarbons (HFCs). In this study, we measured the crit. parameters of binary mixts. of HFE-143m with four HFCs-pentafluoroethane (CHF2CF3, HFC-125), 1,1,1,2-tetrafluoroethane (CH2FCF3, HFC-134a), 1,1,1,2,3,3,3-heptafluoropropane (CF3CHFCF3, HFC-227ea), and 1,1,1,2,3,3-hexafluoropropane (CHF2CHFCF3, HFC-236ea). The uncertainties were ± 10 mK in temp., ± 0.5 kPa in pressure, ± 1 kg m-3 in d., and ± 0.5 % in compn. (molar base). The HFCs were selected for the similarities of their normal b.ps. The exptl. data were correlated with equations proposed by Higashi. .