IE59866B1 - Methylene chloride-based composition - its use for metal degreasing - Google Patents
Methylene chloride-based composition - its use for metal degreasingInfo
- Publication number
- IE59866B1 IE59866B1 IE195687A IE195687A IE59866B1 IE 59866 B1 IE59866 B1 IE 59866B1 IE 195687 A IE195687 A IE 195687A IE 195687 A IE195687 A IE 195687A IE 59866 B1 IE59866 B1 IE 59866B1
- Authority
- IE
- Ireland
- Prior art keywords
- methylene chloride
- composition
- degreasing
- metals
- weight
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
- C23G5/02—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents
- C23G5/028—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents containing halogenated hydrocarbons
- C23G5/02854—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents containing halogenated hydrocarbons characterised by the stabilising or corrosion inhibiting additives
- C23G5/02861—Oxygen-containing compounds
- C23G5/0288—Epoxy compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/38—Separation; Purification; Stabilisation; Use of additives
- C07C17/42—Use of additives, e.g. for stabilisation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Detergent Compositions (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Epoxy Compounds (AREA)
- Anti-Oxidant Or Stabilizer Compositions (AREA)
Abstract
Degreasing of metals, in particular of light alloys. Propylene oxide, acetone and tetrahydrofuran are added to the methylene chloride.
Description
Th© present invention relates to a composition based on methylene chloride and to its use for degreasing metals.
Owing to their dissolving power, their non5 flammability, and their relatively low boiling point, chlorinated hydrocarbons ax© most often used for th© degreasing of metals, textiles,'ceramics and glasses.
Methylene chloride is particularly resistant to oxidation, hydrolysis and pyrolysis. It does not par19 ticipate in any photochemical reaction. Its low boiling point enables it to be used at low temperature- All these properties thus make it a solvent of choice In th© degreasing of metals.
However, during this operation, it may react with aromatic compounds introduced during the processing of light metals.
By a reaction mechanism (of th® Friedel-Crafts type), hydrochloric acid and heavier compounds, which contaminate th© methylene chloride, are subsequently 2Q formed. Accordingly, there is an explosion risk due to decomposition (formation of acid chloride, phosgene, hydrogen chloride gas).
In order to reduce these difficulties, it is .necessary to add to the methylene chloride small amounts of organic products which prevest this reactions this produces stabilisationCompositions of stabilised methylene chloride have already been proposed- OS Patent 3,887,628 describes methylene chloride containing 0-05 to 2 % of butylene oxide and propylene oxide. US Patent 3,923,912 describes methylene chloride containing 0.05 to 2 % of acetone or metal ethyl ketone and, If desired, propylene oxide. OS Patent 4,108,910 describes methylene chloride containing an epoxide and an aliphatic monoether. European Patent EP 11,658 describes methylene chloride stabilised with ethyl formate or methyl formateOS Patent OS-A-S,860,665 describes a composition containing metnylene chloride and 0-05 to 2 % by weight (relative to th© weight of methylene chloride) of tetrahydrofuran and propylene oxide. However, the compositions containing two stabilisers are not always satisfactory in the various steps of the BAM test.
Accordingly, one aim of the invent ion is to propose a composition useful for degreasing metals, which composition is stable in the presence of light metals, such as aluminium or alloys thereof.
Th© composition according to the invention, which is based on methylene chloride and useful for degreasing metals, contains at least one stabiliser. It is characterised In that it contains, as stabilisers: (a) propylene oxide or butylene oxide, (b) acetone, and (c) tetrahydrofuran, each of the compounds (a), (b) and (c) representing between 0.05 and 5 % by weight of the total weight of the composition.
Preferably, the amount of each of the stabilisers (a), (b) and (c) represent between 0.2 and 2 % by weight of the total weight of the composition.
Th® composition according to the invention is prepared by simply mixing the products with methylene chloride. This mixing can take place at ambient temperature and more particularly between 5 and 30 "CThe present invention also relates to a process for degreasing metals by means of the composition according to the Invention.. Degreasing can take place In the vapour phase or liquid phase isy conventional 'procedures.
A composition of the formula: (in % by weight) - methylene chloride 98 - propylene oxide 0.5 - acetone 1 - tetrahydrofuran 0.5 is prepared.
This composition passes the BAM test (Bundesanstalt fur material prufung (sic) (Federal Institute of Material Testing], German Federal Republic). follows: - 3 As is known, the 4 steps of the BAH test are as 1) 100 ml of toluene» 0»7 g of A1C13 and 18 g of aluminium flakes are added to 100 ml of composition. The mixture is refluxed for 18 hours in a water bath at 58*C, 2) 1 g of zinc stearate ar® added to mixture 1)# which is then refluxed for X8 hours, 3) 10 ml of oleic acid are added to mixture 1),.,, which is then refluxed for 18 hours, 4) 300 al of composition are distilled to give 3 fractions of 100 ml, followed by carrying out test 1) with each of the 3 fractions.
A formulation is accepted by 3AM if it does not show any reaction over the course of these experiments. r, o j, 6 β ΟΜΙ£
Claims (6)
1. 1. Composition based on methylene chloride and comprising at least one stabiliser, useful for degreasing metals, characterised in that it contains, as 5 stabilisers; a) propylene oxide or butylene oxide, b) acetone, and c) tetrahydrofuran, each of these compounds (a), (b) and (c) representing 10 between 0.05 and 5% by weight of the total weight of the composition.
2. Composition according to Claim 1, characterised in that the amount of each of compounds (a), (b) and (c) is between 0.2 and 2% by weight. 15
3. Composition according to one of Claims 1 and 2, characterised in that it comprises, as stabilisers, propylene oxide, acetone and tetrahydrofuran.
4. Process for degreasing metals, characterised in that said metals are brought into contact with a composi2q tion according to one of Claims 2 and 3.
5. A composition according to claim 1, substantially as hereinbefore described and exemplified.
6. A process according to claim 4 for degreasing metals, substantially as hereinbefore described and exemplified.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8610527A FR2601701B1 (en) | 1986-07-21 | 1986-07-21 | METHYLENE CHLORIDE COMPOSITION - USE THEREOF FOR DEGREASING METALS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE871956L IE871956L (en) | 1988-01-21 |
| IE59866B1 true IE59866B1 (en) | 1994-04-20 |
Family
ID=9337577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE195687A IE59866B1 (en) | 1986-07-21 | 1987-07-20 | Methylene chloride-based composition - its use for metal degreasing |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0258080B1 (en) |
| JP (1) | JPS6328891A (en) |
| AT (1) | ATE71671T1 (en) |
| CA (1) | CA1295207C (en) |
| DE (1) | DE3776038D1 (en) |
| DK (1) | DK170075B1 (en) |
| ES (1) | ES2006201A6 (en) |
| FR (1) | FR2601701B1 (en) |
| GR (1) | GR3004211T3 (en) |
| IE (1) | IE59866B1 (en) |
| NO (1) | NO173616C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2729135A1 (en) * | 1995-01-10 | 1996-07-12 | Atochem Elf Sa | COMPOSITION BASED ON STABILIZED METHYLENE CHLORIDE, USEFUL FOR DEGREASING METALS |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2029261A5 (en) * | 1969-01-21 | 1970-10-16 | Solvay | Stabilising agent for 1,1,1- trichlorothene |
| US3923912A (en) * | 1973-02-23 | 1975-12-02 | Diamond Shamrock Corp | Methylene chloride stabilized with ketones |
| US3860665A (en) * | 1973-02-23 | 1975-01-14 | Diamond Shamrock Corp | Methylene chloride stabilized with tetrahydrofuran |
-
1986
- 1986-07-21 FR FR8610527A patent/FR2601701B1/en not_active Expired - Lifetime
-
1987
- 1987-07-09 DE DE8787401628T patent/DE3776038D1/en not_active Expired - Fee Related
- 1987-07-09 EP EP19870401628 patent/EP0258080B1/en not_active Expired - Lifetime
- 1987-07-09 AT AT87401628T patent/ATE71671T1/en not_active IP Right Cessation
- 1987-07-15 JP JP62176956A patent/JPS6328891A/en active Granted
- 1987-07-20 NO NO873028A patent/NO173616C/en not_active IP Right Cessation
- 1987-07-20 CA CA000542470A patent/CA1295207C/en not_active Expired - Lifetime
- 1987-07-20 ES ES878702114A patent/ES2006201A6/en not_active Expired
- 1987-07-20 DK DK376587A patent/DK170075B1/en not_active IP Right Cessation
- 1987-07-20 IE IE195687A patent/IE59866B1/en not_active IP Right Cessation
-
1992
- 1992-04-01 GR GR920400581T patent/GR3004211T3/el unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR2601701B1 (en) | 1992-12-31 |
| DE3776038D1 (en) | 1992-02-27 |
| JPS6328891A (en) | 1988-02-06 |
| DK376587D0 (en) | 1987-07-20 |
| GR3004211T3 (en) | 1993-03-31 |
| NO173616C (en) | 1994-01-05 |
| IE871956L (en) | 1988-01-21 |
| CA1295207C (en) | 1992-02-04 |
| EP0258080A1 (en) | 1988-03-02 |
| ATE71671T1 (en) | 1992-02-15 |
| NO873028L (en) | 1988-01-22 |
| NO873028D0 (en) | 1987-07-20 |
| ES2006201A6 (en) | 1989-04-16 |
| DK376587A (en) | 1988-01-22 |
| NO173616B (en) | 1993-09-27 |
| FR2601701A1 (en) | 1988-01-22 |
| DK170075B1 (en) | 1995-05-15 |
| JPH0356313B2 (en) | 1991-08-27 |
| EP0258080B1 (en) | 1992-01-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0215470B1 (en) | Process for the stabilisation of organopolysiloxanes | |
| Woods et al. | 2-Vinyl-4, 4, 6-trimethyl-1, 3, 2-dioxaborinane. II. Derivatives1 | |
| EP0641799A2 (en) | Pristine alkylsiloxanes and method for their preparation | |
| IE59866B1 (en) | Methylene chloride-based composition - its use for metal degreasing | |
| IE903243A1 (en) | PURIFICATION OF 1,1-DICHLORO-1-fluoroethane | |
| US3458509A (en) | 4-allyltetrahydro-dimethyl-2h-1,4-thiazines | |
| Henne et al. | Low temperature photochemistry of the acetone/2‐propanol system | |
| US4294996A (en) | Method of reducing formation of chlorinated dioxins in manufacture of chlorinated phenols | |
| EP0043303B1 (en) | Process for the isomerization and/or rearrangement of polychlorobenzenes | |
| FI84629B (en) | METHYLENKLORIDBASERAD BLANDNING OCH DESS ANVAENDNING VID FETTAVLAEGSNING FRAON METALLER. | |
| US2837552A (en) | Cleavage of silicon-to-silicon and siloxane linkages | |
| Campbell et al. | Reduction of Multiple Carbon Bonds. V. The Reduction of Aromatic Hydrocarbons and Dialkylacetylenes by Calcium Ammonia1, 2 | |
| US5315049A (en) | Process for the nuclear chlorination of aromatic hydrocarbons | |
| US2519691A (en) | Chlorinated hydrocarbon | |
| US3215722A (en) | Process for preparing p-chlorophenyl borates | |
| JP2684385B2 (en) | Method for producing metachloroperbenzoic acid | |
| DE1092026B (en) | Process for the production of antioxidant, polynuclear condensation products containing phenolic rings | |
| Heller | The Racemization of d (+)-3-Methylhexane1 | |
| KR960701027A (en) | PROCESS FOR THE PREPARATION OF BIS (2-BENZOXAZOLYL) STILBENES | |
| EP0156352B1 (en) | Preparation of (alkylthio-,cycloalkythio- or arylthio)-phenols | |
| US5186864A (en) | Synthesis of dielectric liquids by improved friedel-crafts condensation | |
| US4400556A (en) | Catalyst for reducing formation of chlorinated dioxins in manufacture of chlorinated phenols | |
| EP0411035B1 (en) | Process for preparing 2-bromoethyl acetate | |
| KR840000278B1 (en) | Preparation of l,l,l,-trifluoro-o-toluicfluoride | |
| EP0190594A2 (en) | Coupling of chloroperfluoroalkanes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM4A | Patent lapsed |