compositions comprising hydrogenated fluorcarburi quasi azeotropiche and hydrocarbons suitable for use as profpellenti fluids for aerosol

摘要

use of mixtures of hydrogen near azeotropiche fluorocarbons with butane or isubutano choices between: a) 1, 1, 1, 2 - tetrafluoroetano (hfc-134a) 5 - 88% by weight, 1, 1, 1, 2, 3, 3.3 - eptafluoropropano (hfc - 227ea) 12 - 95% by weight, (b) 1, 1, 1, 2 - tetrafluoroetano (hfc-134a) 10 to 37% by weight, 1, 1, 1, 2, 3, 3, 3 - eptafluropropano (hfc - 227a) 12 to 31% by weight no butane, 1 to 30% by weight of (c), 1, 1,1, 2 - tetrafluroetano (hfc-134a) 18 to 69% by weight, 1, 1, 1, 2, 3, 3, 3 - eptafluoropropano (hfc - 227a) 30 to 81% by weight isobutane 1 to 30% by weight as propellants in aerosols and fluid mixtures in the same.these mixtures have zero odp and gwp is very low, no or low flammability.loss of pressure during use; and good solubility in the solvents of typical formulations for aerosol.