Azeotropic mixture with a low boiling point, the use as a refrigerant, propellant or threshold means for plastic foam.

摘要

The invention relates to a minimum boiling point azeotrope, used as a refrigerant fluid in the replacement of the current trifluorobromomethane (1301) in the industrial refrigeration systems are very low temperature to compression single stage. & br / the azeotrope according to the invention, is a mixture of 1,1,1 trifluoroethane (hfa 143a) and propane (r 290). At the boiling point of normal (approximately - 53,4degré c. under 1,013 bar), its content of 1,1,1 - trifluoroethane is approximately 70,6% by weight and that of propane 29,4%. (br / this azeotrope can also be used as a propellant of aerosols or as an expansion agent plastic foams.