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.

Claims

21 · 2 independent · depth 3

21 granted claims

›1.independentA nonflammable composition consisting of:n(a) one fluorinated compound being a hydrofluoroalkene;(b) 1,2-dichloroethylene;(c) an effective amount of a…+19

›2.↳ 1The composition according to claim 1, wherein said hydrofluoroalkene is an aliphatic compound with 1 or 2 Câ€”C double bonds and with 3 to 5 carbon at…d2

›3.↳ 1The composition according to claim 1, wherein said hydrofluoroalkene has a ratio of fluorine atoms to hydrogen atoms higher than 2:1.d2

›4.↳ 1The composition according to claim 1, wherein said hydrofluoroalkene is a pentafluoropropene.d2+1

›6.↳ 1The composition according to claim 1, wherein the stabilizer is a flammable compound.d2

›7.↳ 1The composition according to claim 1, wherein the stabilizer is a C3-C5 alcohol.d2

›8.↳ 1The composition according to claim 1, wherein the stabilizer is isopropanol.d2

›9.↳ 1The composition according to claim 1, wherein the stabilizer is a C1-C3 nitroalkane.d2

›10.↳ 1The 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 tota…d2

›11.↳ 1The 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…d2

›12.↳ 1The 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 th…d2

›13.↳ 1The 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 rela…d2

›14.↳ 1The composition according to claim 1, wherein the 1,2-dichloroethylene consists essentially of trans-1,2-dichloroethylene.d2

›15.↳ 1The composition according to claim 1, being azeotropic or pseudo-azeotropic.d2

›16.↳ 1The composition according to claim 1, wherein the stabilizer is effective to inhibit polymerization, oxidation, or degradation of said fluorinated com…d2

›17.↳ 1The composition according to claim 1, consisting of said compounds (a), (b), (c), and said propellant.d2+2

›19.↳ 1A process for cleaning parts comprising a step of contacting parts to be cleaned with a cleaning agent, wherein the composition according to claim 1 i…d2

›21.independentA nonflammable composition, comprisingn(a) a fluorinated compound, wherein said fluorinated compound is 1,1,1,3,3-pentafluorobutane;(b) 1,2-dichloroet…

Classifications

5 codes

IPC · International Patent Classification

Section C — Chemistry; metallurgy

C09K5/04

USPC · US Patent Classification

252/67510/408134/40510/412

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Pendency

1.6 y

599 days filing → grant

Office actions

non-final + final

Responses

1 RCE

Examiner

Necholus Ogden, Jr.

art unit 1761 · TC 1700

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1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20130079267 A1	28 Mar 2013

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