EP0409191B1 - Cleaning agent for epoxy resin coatings on ceramic tiles etc. - Google Patents
Cleaning agent for epoxy resin coatings on ceramic tiles etc. Download PDFInfo
- Publication number
- EP0409191B1 EP0409191B1 EP90113752A EP90113752A EP0409191B1 EP 0409191 B1 EP0409191 B1 EP 0409191B1 EP 90113752 A EP90113752 A EP 90113752A EP 90113752 A EP90113752 A EP 90113752A EP 0409191 B1 EP0409191 B1 EP 0409191B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- epoxy resin
- soap
- organic solvent
- cleaning agent
- ceramic tiles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000003822 epoxy resin Substances 0.000 title claims abstract description 11
- 229920000647 polyepoxide Polymers 0.000 title claims abstract description 11
- 239000012459 cleaning agent Substances 0.000 title description 2
- 239000000919 ceramic Substances 0.000 title 1
- 238000000576 coating method Methods 0.000 title 1
- 239000000344 soap Substances 0.000 claims abstract description 13
- 239000003960 organic solvent Substances 0.000 claims abstract description 12
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000000839 emulsion Substances 0.000 claims abstract description 4
- 150000001875 compounds Chemical class 0.000 claims abstract 2
- 239000000203 mixture Substances 0.000 claims description 8
- 239000002904 solvent Substances 0.000 claims description 8
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 5
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 5
- 239000000194 fatty acid Substances 0.000 claims description 5
- 229930195729 fatty acid Natural products 0.000 claims description 5
- 150000004665 fatty acids Chemical class 0.000 claims description 5
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 150000002148 esters Chemical group 0.000 claims description 3
- 159000000001 potassium salts Chemical class 0.000 claims description 3
- 150000001298 alcohols Chemical class 0.000 claims description 2
- 238000010790 dilution Methods 0.000 claims 1
- 239000012895 dilution Substances 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000011440 grout Substances 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 239000003599 detergent Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 239000013043 chemical agent Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004922 lacquer Substances 0.000 description 2
- PGMYKACGEOXYJE-UHFFFAOYSA-N pentyl acetate Chemical compound CCCCCOC(C)=O PGMYKACGEOXYJE-UHFFFAOYSA-N 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 241000779819 Syncarpia glomulifera Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 125000005608 naphthenic acid group Chemical group 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000001739 pinus spp. Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 229940036248 turpentine Drugs 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
- C11D17/08—Liquid soap, e.g. for dispensers; capsuled
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D9/00—Compositions of detergents based essentially on soap
- C11D9/04—Compositions of detergents based essentially on soap containing compounding ingredients other than soaps
- C11D9/22—Organic compounds, e.g. vitamins
- C11D9/26—Organic compounds, e.g. vitamins containing oxygen
Definitions
- Epoxy resin has the property of reacting very quickly. For this reason, one must work very carefully on the one hand, i.e. care must be taken to ensure that the epoxy grout only reaches the joint to be processed and not the tiles immediately adjacent to it. If the grout is still on the tile, it must be removed immediately, because otherwise it can no longer be removed or only with great effort. But even if the processor responds immediately, removal is only possible with great difficulty.
- CH-PS 670 832 describes an organic, chlorohydrocarbon-free stripping, solvent and paint remover which is composed of a resin solvent from the group of the esters, a swelling agent from the group of oxygen heterocycles, a solvent for surfactants and thickeners, one or more surfactants from the group of alkylbenzenesulfonates and one or more thickeners from the group of alkylhydroxyalkylcelluloses, the agent containing one or more aprotic or non-aprotic polar solubilizers. Only organic solvents or solubilizers are used to achieve homogeneous mixing of the components. However, these organic solvents are undesirable for reasons of environmental protection and efforts are being made in the development of cleaning agents to greatly reduce their proportion or to dispense with them entirely.
- US-A-2,064,725 relates to an aqueous detergent composition which contains a soap and at least one organic solvent, for example ethyl acetate, butyl acetate, pentyl acetate, which serves as a paint solvent.
- This detergent composition is suitable for removing cellulose lacquer layers, paints, enamel lacquers, glazes, printing inks and similar materials from the skin without affecting them too much when the agent is used.
- the composition In order to achieve a suitable cleaning effect, the composition must additionally contain an abrasive.
- Such an abrasive-containing detergent composition can only be used for purposes in which the abrasive effect of the abrasive cannot cause any damage to the surface to be cleaned.
- the invention has for its object to facilitate the cleaning of smeared with epoxy resin tiles.
- aqueous emulsion which contains a soap and a suitable organic solvent for hardened epoxy resins, the proportion of the soap being 10 to 30% by weight, based on the organic solvent.
- esters of lower fatty acids with lower alcohols are preferred.
- Butyl acetate proved to be particularly suitable.
- Soaps suitable for the purposes of the invention are the sodium or potassium salts of saturated and unsaturated higher fatty acids, resin acids, rosin and naphthenic acids, which are commercially available as solid or semi-solid mixtures.
- the potassium salts of higher fatty acids, the so-called soft soaps or potassium soaps have proven to be particularly suitable. Their proportion is significantly higher than is necessary only for the emulsification of the organic solvent and is about 10 to 30%, in particular 15 to 25% by weight of the amount of the organic solvent.
- a mixture which has been found to be very suitable for removing epoxy resins from plates or tiles has been obtained by diluting a mixture of 100 liters of butyl acetate and 20 kg of soft soap with 500 liters of cold water.
- the product thus produced can be filled into canisters and is ready for use in this form.
- epoxy resins can be removed easily and effectively without any residues and thus free of fog. It can also be used to remove spots that were discovered afterwards. This removal of any residues of epoxy grout is achieved in a much shorter time than with the previously known methods. The time saved compared to the conventional way of working is more than 50%.
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Emergency Medicine (AREA)
- Health & Medical Sciences (AREA)
- Paints Or Removers (AREA)
- Detergent Compositions (AREA)
- Epoxy Resins (AREA)
- Finishing Walls (AREA)
Abstract
Description
Bei Naßräumen sowie bei Räumen in denen mit chemischen Mitteln gearbeitet wird und in denen Fliesen verlegt sind, ist es erforderlich, daß die Fugen dieser Fliesen mit Epoxidharz gegen Nässe und gegen chemische Mittel abgedichtet werden. Epoxidharz hat die Eigenschaft sehr schnell zu reagieren. Aus diesem Grund muß einerseits sehr sorgfältig gearbeitet werden, d.h. man muß sorgfältig darauf achten, daß die Epoxidharz-Fugenmasse nur in die zu bearbeitende Fuge und nicht auf die unmittelbar daran angrenzenden Fliesen gelangt. Kommt die Fugenmasse noch auf die Fliese, so muß sie alsbald entfernt werden, weil sie sich sonst nicht mehr oder nur mit allergrößter Mühe entfernen läßt. Aber auch dann, wenn der Bearbeiter sofort reagiert, ist eine Entfernung nur mit großer Mühe möglich.In wet rooms and in rooms in which chemical agents are used and in which tiles are laid, it is necessary that the joints of these tiles are sealed with epoxy resin against moisture and against chemical agents. Epoxy resin has the property of reacting very quickly. For this reason, one must work very carefully on the one hand, i.e. care must be taken to ensure that the epoxy grout only reaches the joint to be processed and not the tiles immediately adjacent to it. If the grout is still on the tile, it must be removed immediately, because otherwise it can no longer be removed or only with great effort. But even if the processor responds immediately, removal is only possible with great difficulty.
Bisher wurde das überschüssige Material mit dem elastischen Fugenspachtel oder der Schlämmkelle durch Abziehen in diagonaler Richtung von der Fliesenoberfläche entfernt und das restliche Fugenmaterial an der Oberfläche mit möglichst wenig Wasser emulgiert. Es war unbedingt notwendig, die Fliesenflächen danach nochmals mit einem sauberen weichen Schwamm zu reinigen. Insbesondere bei unglasierten Fliesen und solchen mit Mattglasuren muß vor dem Aushärten rückstandsfrei abgewaschen werden.So far, the excess material has been removed from the tile surface by pulling it diagonally with the elastic joint filler or the trowel and the remaining joint material has been emulsified on the surface with as little water as possible. It was absolutely necessary to clean the tile surfaces again with a clean, soft sponge. In the case of unglazed tiles and those with matt glazes in particular, they must be washed off without residue before curing.
In der Praxis wurde auch schon Terpentin zur Entfernung der letzten Reste der Epoxidharz-Fugenmasse verwendet.In practice, turpentine has also been used to remove the last residues of the epoxy grout.
Aber auch hier bleibt oftmals ein Schleier zurück, der sich nicht oder nur kaum entfernen läßt. Empfohlen wird auch das Abreiben mit Spiritus zur Entfernung des Schleiers von glasierten Flächen.But here, too, a veil often remains that cannot be removed or can only be removed with difficulty. Rubbing with spirit to remove the veil from glazed surfaces is also recommended.
Die CH-PS 670 832 beschreibt ein organisches, chlorkohlenwasserstofffreies Entschichtungs-, Löse- und Entlackungsmittel, das sich zusammensetzt aus einem Harzlöser aus der Gruppe der Ester, einem Quellmittel aus der Gruppe der Sauerstoffheterocyclen, einem Lösemittel für Tenside und Verdicker, einem oder mehreren Tensiden aus der Gruppe der Alkylbenzolsulfonate und einem oder mehreren Verdickern aus der Gruppe der Alkylhydroxyalkylcellulosen, wobei das Mittel einen oder mehrere aprotische oder nicht aprotische polare Lösungsvermittler enthält. Es werden ausschließlich organische Lösungsmittel bzw. Lösungsvermittler eingesetzt, um eine homogene Vermischung der Komponenten zu erreichen. Diese organischen Lösungsmittel sind jedoch aus Umweltschutzgründen unerwünscht und man ist bei der Entwicklung von Reinigungsmittel bestrebt, ihren Anteil stark zu reduzieren oder ganz auf sie zu verzichten.CH-PS 670 832 describes an organic, chlorohydrocarbon-free stripping, solvent and paint remover which is composed of a resin solvent from the group of the esters, a swelling agent from the group of oxygen heterocycles, a solvent for surfactants and thickeners, one or more surfactants from the group of alkylbenzenesulfonates and one or more thickeners from the group of alkylhydroxyalkylcelluloses, the agent containing one or more aprotic or non-aprotic polar solubilizers. Only organic solvents or solubilizers are used to achieve homogeneous mixing of the components. However, these organic solvents are undesirable for reasons of environmental protection and efforts are being made in the development of cleaning agents to greatly reduce their proportion or to dispense with them entirely.
Die US-A-2,064,725 betrifft eine wäßrige Reinigungsmittelzusammensetzung, die eine Seife und wenigstens ein organisches Lösungsmittel, beispielsweise Ethylacetat, Butylacetat, Pentylacetat enthält, welches als Lacklösungsmittel dient. Diese Reinigungsmittelzusammensetzung ist zur Entfernung von Celluloselackschichten, Farben, Emaillelacken, Glasuren, Druckfarben und ähnlichen Materialien von der Haut geeignet, ohne diese bei der Anwendung des Mittels zu stark in Mitleidenschaft zu ziehen. Um eine geeignete Reinigungswirkung zu erzielen, muß die Zusammensetzung zusätzlich ein Scheuermittel enthalten. Eine derartige scheuermittelhaltige Reinigungsmittelzusammensetzung kann nur für Zwecke eingesetzt werden, bei denen die Abriebwirkung des Scheuermittels keine Schäden an der zu reinigenden Oberfläche hervorrufen kann.US-A-2,064,725 relates to an aqueous detergent composition which contains a soap and at least one organic solvent, for example ethyl acetate, butyl acetate, pentyl acetate, which serves as a paint solvent. This detergent composition is suitable for removing cellulose lacquer layers, paints, enamel lacquers, glazes, printing inks and similar materials from the skin without affecting them too much when the agent is used. In order to achieve a suitable cleaning effect, the composition must additionally contain an abrasive. Such an abrasive-containing detergent composition can only be used for purposes in which the abrasive effect of the abrasive cannot cause any damage to the surface to be cleaned.
Der Erfindung liegt die Aufgabe zugrunde, die Reinigung von mit Epoxidharz verschmierten Fliesen und Platten zu erleichtern.The invention has for its object to facilitate the cleaning of smeared with epoxy resin tiles.
Diese Aufgabe wird erfindungsgemäß durch die Verwendung einer wäßrigen Emulsion gelöst, die eine Seife und ein geeignetes organisches Lösungsmittel für angehärtete Epoxidharze enthält, wobei der Anteil der Seife 10 bis 30 Gew.-%, bezogen auf das organische Lösungsmittel beträgt.This object is achieved according to the invention by the use of an aqueous emulsion which contains a soap and a suitable organic solvent for hardened epoxy resins, the proportion of the soap being 10 to 30% by weight, based on the organic solvent.
Unter den organischen Lösungsmitteln werden Ester von niederen Fettsäuren mit niederen Alkoholen bevorzugt. Als besonders geeignet erwies sich Butylacetat.Among the organic solvents, esters of lower fatty acids with lower alcohols are preferred. Butyl acetate proved to be particularly suitable.
Für die Zwecke der Erfindung geeignete Seifen sind die Natrium- oder Kaliumsalze der gesättigten und ungesättigten höheren Fettsäuren, der Harzsäuren, des Kolophoniums und der Naphthensäuren, die als feste oder halbfeste Gemische im Handel sind. Als besonders geeignet haben sich die Kaliumsalze höherer Fettsäuren, die sogenannten Schmierseifen oder Kaliseifen erwiesen. Ihr Anteil ist wesentlich höher als nur zur Emulgierung des organischen Lösungsmittels nötig und beträgt etwa 10 bis 30 %, insbesondere 15 bis 25 Gew.-% der Menge des organischen Lösungsmittels.Soaps suitable for the purposes of the invention are the sodium or potassium salts of saturated and unsaturated higher fatty acids, resin acids, rosin and naphthenic acids, which are commercially available as solid or semi-solid mixtures. The potassium salts of higher fatty acids, the so-called soft soaps or potassium soaps, have proven to be particularly suitable. Their proportion is significantly higher than is necessary only for the emulsification of the organic solvent and is about 10 to 30%, in particular 15 to 25% by weight of the amount of the organic solvent.
Es hat sich als zweckmäßig erwiesen, zunächst die Seife gleichmäßig in dem Lösungsmittel zu verteilen, d.h. partiell oder vollständig zu lösen und dann durch Zugabe von kaltem Wasser die gewünschte Emulsion zu bilden. Die Wassermenge beträgt in der Regel das 4- bis 6-Fache der Menge des organischen Lösungsmittels.It has proven expedient to first distribute the soap evenly in the solvent, ie to dissolve it partially or completely, and then to dissolve it Add cold water to form the desired emulsion. The amount of water is usually 4 to 6 times the amount of the organic solvent.
Als sehr geeignet zur Entfernung von Epoxidharzen von Platten oder Fliesen hat sich ein Gemisch erwiesen, daß durch Verdünnen einer Mischung von 100 Liter Butylacetat und 20 kg Schmierseife mit 500 Liter kaltem Wasser erhalten wurde.A mixture which has been found to be very suitable for removing epoxy resins from plates or tiles has been obtained by diluting a mixture of 100 liters of butyl acetate and 20 kg of soft soap with 500 liters of cold water.
Das so hergestellte Produkt kann in Kanister abgefüllt werden und ist in dieser Form einsatzfähig.The product thus produced can be filled into canisters and is ready for use in this form.
Mit den erfindungsgemässen Mitteln können Epoxidharze ohne jegliche Rückstände einfach und wirksam und damit schleierfrei entfernt werden. Auch im Nachhinein noch entdeckte Stellen lassen sich damit beseitigen. Diese Entfernung irgendwelcher Reste von Epoxidharz-Fugenmassen gelingt in wesentlich kürzerer Zeit als mit den bisher bekannten Methoden. Die Zeitersparnis gegenüber der herkömmlichen Arbeitsweise beträgt mehr als 50 %.With the agents according to the invention, epoxy resins can be removed easily and effectively without any residues and thus free of fog. It can also be used to remove spots that were discovered afterwards. This removal of any residues of epoxy grout is achieved in a much shorter time than with the previously known methods. The time saved compared to the conventional way of working is more than 50%.
Claims (4)
- The use of an aqueous emulsion which contains a soap and an organic solvent for hardened epoxy resins for the removal of epoxy resin jointing compounds for plates or tiles, the proportion of the soap being 10 to 30% by weight, relative to the organic solvent.
- The use according to Claim 1, characterised in that the soaps are the potassium salts of higher fatty acids.
- The use according to Claim 1 or 2, characterised in that the solvent is an ester of lower fatty acids with lower alcohols, in particular butyl acetate.
- The use of a mixture, obtained by dilution of a mixture of 100 litres butyl acetate and 20 kg soft soap with 500 litres water for the purpose of Claim 1.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3923905 | 1989-07-19 | ||
| DE3923905A DE3923905C1 (en) | 1989-07-19 | 1989-07-19 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0409191A2 EP0409191A2 (en) | 1991-01-23 |
| EP0409191A3 EP0409191A3 (en) | 1991-07-31 |
| EP0409191B1 true EP0409191B1 (en) | 1996-03-06 |
Family
ID=6385394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90113752A Expired - Lifetime EP0409191B1 (en) | 1989-07-19 | 1990-07-18 | Cleaning agent for epoxy resin coatings on ceramic tiles etc. |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0409191B1 (en) |
| AT (1) | ATE135039T1 (en) |
| DE (2) | DE3923905C1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9592476B2 (en) | 2014-05-30 | 2017-03-14 | Pall Corporation | Membrane comprising self-assembled block copolymer and process for producing the same by hybrid casting (IIb) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE87274C (en) * | ||||
| US2064725A (en) * | 1936-03-06 | 1936-12-15 | Thurlow G Gregory | Detergent composition |
| DE2910807C2 (en) * | 1979-03-20 | 1982-07-15 | Basf Ag, 6700 Ludwigshafen | Polishing compound for polishing the surfaces of magnetic storage disks |
| CH670832A5 (en) * | 1987-03-19 | 1989-07-14 | Rico S A Lausanne | Paint and varnish stripping compsn. - comprising chloro-hydrocarbon free resin solubiliser, swelling agent, solvent for surfactant, surfactant, thickener and dissolving assistant |
-
1989
- 1989-07-19 DE DE3923905A patent/DE3923905C1/de not_active Expired - Lifetime
-
1990
- 1990-07-18 DE DE59010172T patent/DE59010172D1/en not_active Expired - Fee Related
- 1990-07-18 AT AT90113752T patent/ATE135039T1/en not_active IP Right Cessation
- 1990-07-18 EP EP90113752A patent/EP0409191B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE59010172D1 (en) | 1996-04-11 |
| ATE135039T1 (en) | 1996-03-15 |
| DE3923905C1 (en) | 1991-02-07 |
| EP0409191A3 (en) | 1991-07-31 |
| EP0409191A2 (en) | 1991-01-23 |
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| RHK1 | Main classification (correction) |
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