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AssigneeSolvay Fluor GmbH
InventorsMichael MARHOLD, Helge RAU, Karsten BORNER, Christoph MEURER
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Nonflammable compositions comprising fluorinated compounds selected from the group consisting of hydrofluoroalkanes, hydrofluoroalkenes, partially or perfluorinated aromatic compounds, hydrofluoroethers, and fluoroketones; 1,2-dichloroethylene, especially trans-1,2-dichloroethylene; and a stabilizer. These non-flammable compositions which preferably contain 1,1,1,3,3-pentafluorobutane, can be used especially as solvents for cleaning and defluxing electronic components and for degreasing metals. The compositions further may comprise a propellant, e.g. 1,1,1,2-tetrafluoroethane. These compositions are especially suitable as flushing agent.
1- A nonflammable composition comprising
2- The composition according to claim 1, wherein said hydrofluoroalkene is an aliphatic compound with 1 or 2 C—C double bonds and with 3 to 5 carbon atoms.
3- The composition according to claim 1, wherein said hydrofluoroalkene has a ratio of fluorine atoms to hydrogen atoms higher than 2:1.
4- The composition according to claim 1, wherein said hydrofluoroalkene is a pentafluoropropene.
5- The composition according to claim 4, wherein the pentafluoropropene is selected from the group consisting of cis-1,2,3,3,3-pentafluoropropene;
6- The composition according to claim 1, wherein the stabilizer is a flammable compound.
7- The composition according to claim 1, wherein the stabilizer is a C3-C5 alcohol.
8- The composition according to claim 1, wherein the stabilizer is isopropanol.
9- The composition according to claim 1, wherein the stabilizer is a C1-C3 nitroalkane.
10- The composition according to claim 1, wherein the effective amount of said stabilizer is equal to or greater than 0.05% by weight relative to the total weight of the composition.
11- The composition according to claim 1, wherein the effective amount of said stabilizer is equal to or higher than 0.12% by weight relative to the total weight of the composition.
12- The composition according to claim 1, wherein the effective amount of said stabilizer is from 0.05% to 1% by weight relative to the total weight of the composition.
13- The composition according to claim 1, wherein the effective amount of said stabilizer is greater than 0% and equal to or less than 0.5% by weight relative to the total weight of the composition.
14- The composition according to claim 1, wherein the 1,2-dichloroethylene consists essentially of trans-1,2-dichloroethylene.
15- The composition according to claim 1, being azeotropic or pseudo-azeotropic.
16- The composition according to claim 1, wherein the stabilizer is effective to inhibit polymerization, oxidation, or degradation of said fluorinated compound or said 1,2-dichloroethylene.
17- The composition according to claim 1, further comprising a propellant.
18- The composition according to claim 17, wherein the propellant is selected from the group consisting of air, nitrogen, carbon dioxide, difluoromethane, trifluoromethane, and fluorinated ethanes.
19- A process for cleaning parts comprising a step of contacting parts to be cleaned with a cleaning agent, wherein the composition according to claim 1 is used as a cleaning agent.
20- A process for cleaning of interior surfaces of refrigeration equipment, comprising a step of contacting said interior surfaces with a cleaning agent wherein the composition according to claim 17 is used as cleaning agent.