Reference

Correlation of experimental data on the thermal conductivity of Freon 21, Freon 22, and Freon 23

Correlation of experimental data on the thermal conductivity of Freon 21, Freon 22, and Freon 23. Geller, V. Z. (Odess. Tekhnol. Inst. im. Lomonosova, Odessa, USSR). Inzh.-Fiz. Zh., 33(1), 75-83 (Russian) 1977. CODEN: INFZA9. DOCUMENT TYPE: Journal CA Section: 69 (Thermodynamics, Thermochemistry, and Thermal Properties) The exptl. literature data on thermal cond. .lambda. of Freon 22 [75-45-6] were analyzed and a system of equations was derived to calc. .lambda. of Freon 21 [75-43-4], Freon 22, and Freon 23 [75-46-7] in a wide range of state parameters. Recommended .lambda. values for these materials -80 to +200.degree. and .ltoreq. 20 MPa are tabulated. The .lambda. values along satn. line are also given.

Propellant mixture for aerosol packages

Propellant mixture for aerosol packages. Heiskel, Elmar; Hoffmann, Bernd; Napierski, Klaus (Hoechst A.-G., Ger.). Ger. Offen. DE 2627343 22 Dec 1977, 16 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C09K003-30. APPLICATION: DE 76-2627343 18 Jun 1976. DOCUMENT TYPE: Patent CA Section: 62 (Essential Oils and Cosmetics) Section cross-reference(s): 41, 42 Aerosol propellant mixts. consist of chlorodifluoromethane (FKW 22) [75-45-6] and a CO group-contg. solvent (e.g. a ketone or ester). The vapor pressure of pure FKW 22 is 18.3 bar at 50°, but is decreased to a value (about 8 bar) compatible with the strength of conventional aerosol containers by mixing with the solvent. When FKW 22 constitutes >50% of the mixt., the combination may be considered noncombustible. For example, a deodorant mixt. was prepd. contg. 2,4,4'-trichloro-2'-hydroxydiphenyl ether 0.23, iso-Pr myristate 0.45, 1,2-propylene glycol 0.90, perfume oil 0.18, 99.5% EtOH 18.24, acetone [67-64-1] 25.00, and FKW 22 55.00 wt. %. The pressure developed by this mixt. was 3.5 and 7.1 bar at 20 and 50°, resp.