CH502428A - Temperature indicating colour pigments - Google Patents
Temperature indicating colour pigmentsInfo
- Publication number
- CH502428A CH502428A CH1037167A CH1037167A CH502428A CH 502428 A CH502428 A CH 502428A CH 1037167 A CH1037167 A CH 1037167A CH 1037167 A CH1037167 A CH 1037167A CH 502428 A CH502428 A CH 502428A
- Authority
- CH
- Switzerland
- Prior art keywords
- color
- solvent
- pref
- binder
- pigment
- Prior art date
Links
- 239000000049 pigment Substances 0.000 title claims abstract description 20
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims abstract description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 10
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims abstract description 10
- 239000002904 solvent Substances 0.000 claims abstract description 9
- 239000011230 binding agent Substances 0.000 claims abstract description 7
- 239000000945 filler Substances 0.000 claims abstract description 7
- 238000005260 corrosion Methods 0.000 claims abstract description 5
- 230000007797 corrosion Effects 0.000 claims abstract description 5
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 5
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 5
- 125000006267 biphenyl group Chemical group 0.000 claims abstract description 4
- -1 polysiloxane Polymers 0.000 claims abstract description 4
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 claims 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 3
- 238000013021 overheating Methods 0.000 abstract description 2
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical class N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 abstract description 2
- 235000010290 biphenyl Nutrition 0.000 abstract 1
- 239000004305 biphenyl Substances 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 230000007704 transition Effects 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- ZYECOAILUNWEAL-NUDFZHEQSA-N (4z)-4-[[2-methoxy-5-(phenylcarbamoyl)phenyl]hydrazinylidene]-n-(3-nitrophenyl)-3-oxonaphthalene-2-carboxamide Chemical compound COC1=CC=C(C(=O)NC=2C=CC=CC=2)C=C1N\N=C(C1=CC=CC=C1C=1)/C(=O)C=1C(=O)NC1=CC=CC([N+]([O-])=O)=C1 ZYECOAILUNWEAL-NUDFZHEQSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 235000010216 calcium carbonate Nutrition 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 235000010215 titanium dioxide Nutrition 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229920003180 amino resin Polymers 0.000 description 1
- ASYZRLCMYUFCHK-UHFFFAOYSA-N azane cobalt phosphoric acid Chemical compound N.[Co].OP(O)(O)=O ASYZRLCMYUFCHK-UHFFFAOYSA-N 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- VDQQXEISLMTGAB-UHFFFAOYSA-N chloramine T Chemical compound [Na+].CC1=CC=C(S(=O)(=O)[N-]Cl)C=C1 VDQQXEISLMTGAB-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000005365 phosphate glass Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- XUIMIQQOPSSXEZ-NJFSPNSNSA-N silicon-30 atom Chemical group [30Si] XUIMIQQOPSSXEZ-NJFSPNSNSA-N 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/26—Thermosensitive paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
Abstract
Corrosion protection and good adhesion of temp. indicator colour pigments for use as safety devices against overheating for example on machinery, containers, chemical and industrial installations, walls, building interiors or exteriors, are achieved simultaneously by mixing a thermo-end point colour pigment (in examples chlorinated phthalocyanine derivs. or CoNH4PO4.H2O) with a binder imparting weather-proofness, pref. cyclised rubber, polysiloxane or chlorinate diphenyl, and preparing a spreadable compsn. by addition of a solvent, pref. benzene. Pref. compn. also contains a filler, such as SiO2 or BaSO4, in pref. amount such that intensity of colour transition is determined by ratio thermo-end point colour pigment to filler.
Description
Verfahren zur Herstellung temperaturanzeigender Farbpigmente
Die Erfindung betrifft ein Verfahren zur Herstellung von auf einer Unterlage bei allen hierfür praktisch in Frage kommenden Temperaturen fixierbaren temperaturanzeigenden Farbpigmenten, dadurch gekennzeichnet, dass zur gleichzeitigen Erzielung eines Korrosionsschutzes bei besonders guter Haftfähigkeit das Thermo-Umschlagfarbpigment mit einem die Wetterfestigkeit vermittelnden Bindemittel vermischt und unter Beigabe eines Lösungsmittels streichfähig gemacht wird.
Es ist bereits bekannt, Verbindungen anorganischer oder organischer Natur, die beim Erhitzen auf eine bestimmte Temperatur ihre Farbe ändern, als temperaturanzeigende Farben zu verwenden.
Es bestehen jedoch Schwierigkeiten, die farbändernden Verbindungen auf die auf ihre Temperatur zu prüfenden Unterlagen so aufzubringen, dass man den bei der Erwärmung auftretenden Farbumschlag deutlich erkennen kann. Die Verwendung von Lacken und trocknenden Ölen üblicher Art als Träger für die temperaturanzeigenden Farbpigmente ist ungeeignet, da diese Trägersubstanzen bei höheren Temperaturen ihrerseits beginnen zu vergilben, sich zu bräunen oder gar zu verkohlen, wodurch ein Erkennen des Farbumschlages weitgehend bzw. völlig verhindert wird.
Es wurde daher bereits vorgeschlagen, als Trägersubstanzen solche Kunstharze aus Harnstoff und Formaldehyd oder anderen Aminoplasten, beispielsweise sogenanntem Uretanharz, Melaminharz und dgl.
zu verwenden und gleichzeitig weisse anorganische Substrate und gegebenenfalls Lösungsmittel beizugeben. Als Lösungsmittel hierfür wurden Methyl-, Äthyloder Butylalkohol, Aceton, Benzol oder dgl. empfohlen.
Dieses Verfahren hat den Nachteil, dass die Haftfähigkeit verhältnismässig gering ist und auch bei Zugabe von Haftmitteln, wie beispielsweise Borsäure oder leichtschmelzendem Natronglas oder dgl., keine ausreichende Haftfähigkeit erreicht werden kann.
Diese temperaturanzeigenden Farbaufstriche konnten daher nur bei verhältnismässig niederen Temperaturen (etwa bis 3000C) und nur bei feuchtigkeits- bzw, wettergeschützten Flächenteilen angewandt werden.
Um solche Farben auch bei höheren Temperaturen verwenden zu können, wurde weiterhin vorgeschlagen, die Farbpigmente mit einem Phosphatglas zu vermahlen, mit Harnstoffharz zu vermischen und diese Mischung dann mit Alkohol oder Methanol zu einer streichfähigen Farbe zu rühren.
Auch dieses Verfahren eignet sich nur für feuchtigkeits- bzw. wettergeschützte Flächen, d. h. für Flächenteile, die im Innern eines Raumes liegen.
Die Erfindung hat sich nun zur Aufgabe gestellt, ein Verfahren zu schaffen, das eine Fixierung temperaturanzeigender Farbpigmente bei allen hierfür vorkommenden Temperaturen ermöglicht, wobei gleichzeitig ein einwandfreier Korrosionsschutz der Anstrichfläche und eine vollkommene Wetterfestigkeit des Anstriches erzielt wird.
Erreicht wird dies dadurch, dass ein Thermo Umschlagfarbpigment mit einem die Wetterfestigkeit vermittelnden Bindemittel, wie z. B. cyclisiertem Kautschuk, Polysiloxan, chloriertem Diphenyl und dgl., vermischt und unter Beigabe eines Lösungsmittels, wie z. B. Benzol, streichfähig gemacht wird.
Vorteilhafterweise wird dieser Mischung noch Füllmaterial, wie z. B. Siliciumdioxyd, Bariumsulfat, Calciumcarbonat und dgl., zugemischt, wobei das Verhältnis der Thermo-Umschlagfarbpigmente zu dem Füllmaterial die Intensität des Farbumschlages bestimmt.
In den Beispielen handelt es sich bei den angegebenen Teilen um Gewichtsteile.
Beispiel 1
20 Teile Polysiloxan werden in 37 Teilen Benzol gelöst und dann werden 7 Teile Siliciumdioxyd, 7 Teile Bariumsulfat sowie 30 Teile Thermo-Umschlagfarbpigmente, die aus einer Mischung von 6 Teilen Heliogen grün (chloriertes Phtalocyanin-Derivat), 4 Teilen Titanweiss (TiO2) und 1 Teil Kreide (CaCO3) bestehen, beigemischt und diese Masse homogenisiert. So erhält man eine grüne, gut streichfähige, äusserst fest haftende wetterfeste Streichfarbe.
Bei Erwärmung des mit dieser Farbe gestrichenen Gegenstandes auf eine Temperatur von 440" C schlägt die grüne Färbung in eine weisse Färbung um und behält diese nach der Abkühlung.
Beispiel 2
12 Teile cyclisierter Kautschuk und 7,5 Teile chloriertes Diphenyl werden in 27 Teilen Benzol gelöst und dann werden 15 Teile Bariumsulfat, 10 Teile Siliciumdioxyd sowie 30 Teile Thermo-Umschlagfarbpigmente in Form von Kobaltammoniumphosphat (CoNH4PO4.
H2O) beigemischt und diese Masse homogenisiert.
So erhält man eine rot-violette, gut streichfähige, fest haftende, wetterfeste Streichfarbe.
Bei der Erwärmung des mit dieser Farbe bestrichenen Gegenstandes auf 140"C schlägt die rot-violette Färbung in eine tiefblaue Färbung um und behält diese nach der Abkühlung.
Die auf diese Weise erhaltenen Anstrichfarben mit thermischem Farbumschlag haben den Vorteil, dass sie bei äusserst günstiger Haftfähigkeit einen vorzüglichen Korrosionsschutz und volle Wetterbeständigkeit aufweisen, wobei der Farbumschlag bei der erreichten Grenztemperatur sehr intensiv und markant ist. Sie können daher bei allen praktisch vorkommenden Fällen, bei denen eine Sicherung gegen Überhitzung erforderlich ist, wie z.B. an Maschinen, Behältern, chemisch-technischen Anlagen, Mauerwerk oder dgl., im Innern eines Gebäudes oder im Freien verwendet werden.
Process for the production of temperature-indicating color pigments
The invention relates to a process for the production of temperature-indicating color pigments which can be fixed on a substrate at all temperatures practically suitable for this purpose, characterized in that, in order to simultaneously achieve corrosion protection with particularly good adhesion, the thermal envelope color pigment is mixed with a binder that provides weather resistance and is added a solvent is made spreadable.
It is already known to use compounds of an inorganic or organic nature, which change their color when heated to a certain temperature, as temperature-indicating colors.
However, there are difficulties in applying the color-changing compounds to the documents to be tested for their temperature in such a way that the color change that occurs during the heating can be clearly recognized. The use of lacquers and drying oils of the usual type as carriers for the temperature-indicating color pigments is unsuitable, since these carrier substances begin to yellow, brown or even char at higher temperatures, which largely or completely prevents the color change from being recognized.
It has therefore already been proposed that such synthetic resins made of urea and formaldehyde or other aminoplasts, for example so-called uretane resin, melamine resin and the like, as carrier substances.
to use and at the same time to add white inorganic substrates and optionally solvents. The recommended solvents for this are methyl, ethyl or butyl alcohol, acetone, benzene or the like.
This method has the disadvantage that the adhesiveness is relatively low and even when adhesives such as boric acid or easily melting soda glass or the like are added, sufficient adhesiveness cannot be achieved.
These temperature-indicating paint spreads could therefore only be used at relatively low temperatures (about up to 3000C) and only on parts of the surface protected from moisture or weather.
In order to be able to use such colors even at higher temperatures, it was further proposed to grind the color pigments with a phosphate glass, mix them with urea resin and then stir this mixture with alcohol or methanol to a paintable color.
This method is also only suitable for surfaces protected from moisture or weather, i.e. H. for parts of the surface that are inside a room.
The invention has now set itself the task of creating a method which enables temperature-indicating color pigments to be fixed at all temperatures occurring for this purpose, with perfect corrosion protection of the paint surface and perfect weather resistance of the paint being achieved at the same time.
This is achieved in that a thermal envelope color pigment with a weatherproof binding agent, such as. B. cyclized rubber, polysiloxane, chlorinated diphenyl and the like., Mixed and with the addition of a solvent, such as. B. benzene, is made spreadable.
Advantageously, this mixture is also filler material, such as. B. silicon dioxide, barium sulfate, calcium carbonate and the like., Mixed, the ratio of the thermal change color pigments to the filler determines the intensity of the color change.
In the examples, the parts given are parts by weight.
example 1
20 parts of polysiloxane are dissolved in 37 parts of benzene and then 7 parts of silicon dioxide, 7 parts of barium sulfate and 30 parts of thermal envelope color pigments, which are made from a mixture of 6 parts of Heliogen green (chlorinated phthalocyanine derivative), 4 parts of titanium white (TiO2) and 1 Part of chalk (CaCO3) are made, mixed in and this mass is homogenized. The result is a green, easily spreadable, extremely firmly adhering, weatherproof coating color.
When the object painted with this color is heated to a temperature of 440 "C, the green color changes to a white color and retains this after cooling.
Example 2
12 parts of cyclized rubber and 7.5 parts of chlorinated diphenyl are dissolved in 27 parts of benzene and then 15 parts of barium sulfate, 10 parts of silicon dioxide and 30 parts of thermal envelope color pigments in the form of cobalt ammonium phosphate (CoNH4PO4.
H2O) and this mass is homogenized.
This gives a red-violet, easily spreadable, firmly adhering, weatherproof coating color.
When the object coated with this color is heated to 140 "C, the red-violet color changes to a deep blue color and retains this after cooling.
The paints with thermal color change obtained in this way have the advantage that they have excellent corrosion protection and full weather resistance with extremely favorable adhesion, the color change being very intense and striking at the limit temperature reached. You can therefore use it in all practical cases where protection against overheating is required, e.g. Can be used on machines, containers, chemical-technical systems, masonry or the like, inside a building or outdoors.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEF0050038 | 1966-08-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH502428A true CH502428A (en) | 1971-01-31 |
Family
ID=7103481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH1037167A CH502428A (en) | 1966-08-26 | 1967-07-22 | Temperature indicating colour pigments |
Country Status (2)
| Country | Link |
|---|---|
| CH (1) | CH502428A (en) |
| DE (1) | DE1669136A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19707864A1 (en) * | 1997-02-27 | 1998-09-03 | Kloeckner Moeller Gmbh | Low voltage switch |
| GB0121312D0 (en) * | 2001-09-04 | 2001-10-24 | Rolls Royce Plc | A temperature indicating paint |
| CN105860827B (en) * | 2015-12-09 | 2019-01-25 | 中昊北方涂料工业研究设计院有限公司 | 1100℃-1350℃ Multi-color irreversible temperature-indicating paint |
-
1966
- 1966-09-26 DE DE19661669136 patent/DE1669136A1/en active Pending
-
1967
- 1967-07-22 CH CH1037167A patent/CH502428A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE1669136A1 (en) | 1971-05-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |