DE1621597A1 - Process for removing the preservation from painted and metallic objects - Google Patents

Description

New patent application

D 3312 V '

"Process for removing the preservation from painted and metallic materials Objects "'

The invention relates to a method for depreserving painted and metallic objects, such as Motor vehicles, preferably by means of; Steam jet devices.

Painted and sensitive metallic surfaces are used in Storage and transport mostly for preservation with -waehshaltigen Provide coatings that prevent corrosion and damage should. These coatings generally consist of hard paraffin or ester waxes, possibly ... with an addition of metal soaps, The detachment of these preservation layers prepares in the Practice significant difficulties. Mostly turn for depreservation Solvent used. Through the solvents the wax layers are removed relatively well. But there are the disadvantages of wastewater pollution, rubber swelling, for example Vehicles that have poor skin tolerance when working with Hand and the nuisance of solvent mist when using in steam blasters.

Documents (Art. 7 % l para. 2 Hr. L sentence 3 of the amendment «·. Ν. 4.9. Luv ·

109822/1813

BATH ORIGINAL.

The normal alkaline cleaning agents, which in addition to ■ alkali " In general, contain inert phosphates and wetting agents no satisfactory results or harm through too high alkali metal paint and metal surfaces, especially possibly Light metal parts. '

The invention was based on the object of a method for To develop depreservation of painted and metallic surfaces that does not have the aforementioned disadvantages and the paintwork and sensitive metal surfaces to be treated does not harm as well as simple and harmless in the handiiabiang is. '■. . '

This object is achieved in that the preserved surfaces with a cleaning solution that Alkali oleate, alkali metal polyphosphate and such alkanolamines and / or polyalcohols that contain a carbon: oxygen

Have a ratio between 3 and A, 5, in a ratio of 1: (0.6 to 6): (0.2 to 1.5) contains in a concentration corresponding to 0.5 to 5 % solids at temperatures above 70 ° C., preferably over -80. C, to be treated.

- "3 -

109 822/1813

In the process according to the invention, proper removal of the preservation is achieved without damage to the paintwork, which is sensitive Metal surfaces, in particular light metal surfaces or on sealing material. Also, the process is in no way harmful to health, and it comes to fruition Use does not have any particular sewage problems.

The depreservation can be particularly advantageous with the Perform the method according to the invention by means of steam jet devices. Particularly quick and easy cleaning is possible, without being annoyed by corrosive or otherwise harmful substances Fumes.

The cleaning solutions used according to the invention contain Alkali size of oleic acid or those fatty acid mixtures which consist mainly of oleic acid, such as potassium or ammonium oleate and preferably sodium oleate. Using other soaps or Wetting agents such as tallow soaps, alkyl benzene sulfonates and nonionic Wetting agents, such as, for example, fatty alcohol-ethylene oxide adducts instead of the oleates leads to considerably poorer, insufficient results in the case of depreservation.

: .. ■ '■ - ■ @AD ORIGINAL 109822/18 13'

The cleaning solutions also contain alkali metal tripolyphosphate and especially sodium tripolyphosphate. The proportion of alkali tri Polyphosphate in the cleaning solution should be preferred here • equal to or greater than. be the proportion of alkali leathers. Other Phosphates, such as orthophosphate, pyrophosphate or hexametaphosphate do not produce sufficient cleaning effects. -._ "_

Those used in the cleaning solutions according to the invention Alkanolamines or polyalcohols have a carbon: oxygen ratio between> and 4-, 5 * such as Tri-. propanolamine, tributanolamine, propyl-j, butyl and pentyl diethanolamine, Hexanediol and octanediol. Mixtures can also be used various alkanolamines and polyalcohols can be used. Other alkanolamines such as diethanolamines and triethanolamines or other polyalcohols, such as, for example, ethylene glycol or Decanediol or diethylene glycol monobutyl ether yield either no clear! solutions or insufficient cleaning effects during depreservation. ..,.

Only if the ratios according to the invention are adhered to
Components are given good results when removing the preservation ■ - ■. The concentration of the cleaning solution on the
The surface to be cleaned or, when using steam blasting devices, should be 0.5 to 5 % based on the pesticide content of the solution.

1098 22/1813

the cleaning solution gets through the steam or the hot Water is diluted, generally in a ratio of 1:10 or more, the suds container (storage container for cleaning solution) the solution supplied to the steam jet equipment accordingly . more concentrated. "be-."

■■■■■ · * - ψ ·

The cleaning solutions can by dissolving the individual Components or a solid mixture of components or can be made by diluting liquid concentrates. .. '

Such concentration preferably, the liquid concentrates in a prepared-,: that they can be equal to the tubs the Dampfstrählgeräte-zügefilhrfc and contain '1 to 10 ■ "■ ^ £ Alkälioleat 6 to 14% and 0.5 Alkalitripoiyphosphat Ms 8% Älkanolämin bzWi . ί oliyalkohöi; ";;-; - ^

The application temperature should be above? 0-G and preferred be more than 80 ° C. It is generally chosen in such a way that that they are above the melting point of the preservative lies.

109822/189?

Example I: Car bodies provided with a layer consisting predominantly of hard paraffin were depreserved using a steam jet device. A cleaning solution of the following composition was placed in the tub of the device

. \ 10 fo sodium tripolyphosphate 5 % potassium oleate 2.5 % ■ triisopropanolamine =

filled. The concentration of the cleaning solution at the nozzle was approx. l _s £%, based on Pestsubstanzen. The nozzle was slowly moved over the vehicles at a distance of 10 cm. The vehicles were then rinsed clear with water. Subsequent additional cleaning (shampooing) was not required.

Example 2: By dissolving a solid detergent concentrate of the following composition

65 % sodium tripolyphosphate

15 % sodium oleate

10 % butyl diethanolamine

10 %

in ten times the amount of water became a cleaning solution manufactured / the the suds container of a steam blasting device

was supplied. BIe concentration on the ^; Die was about ,. "ip $ · There were Autokarosser ± s>; die.mit _a. Handelsütolichen Konser-Vierungsschictot were provided, cleaned and then rinsed with water" - The iCariosserien-wares, and ^{einwandfrei'entkonserviert:} cleaned »> V ^: ·" - ■. ""'■': - - " ^: ί" ■ ^r 'y': '" ^y

Example 3 - Various cleaning solutions were tested for depreservation in the manner listed below. For this purpose, liquid cleaning agent concentration rates of the combination given in Tables 1, 2 and J were used, which were used for the application: uniformity diluted to 2 % _: solids content.

Lacquered panels were fflife an even covering ■ _: a small commercial item ^ for; Car bodies used Ifon, serving inlays and artificially aged by tempering (24 ^ hours at 70 ° C). The prepared: test panels-. were immersed in the aqueous solutions of the composition agent, which were kept constant and then rinsed in water at the same temperature. / ".- - ^: - ^: / V ';:

9 # I2 / 1813

1621537

The speed and completeness of the depreservation was assessed, this assessment being made visually and compared to practical tests. The results of the tests are in the tables: I ₃ . 2 and ^ listed. These tables clearly show the superiority of the cleaning solutions according to the invention (see solution e / f, h, i in Table 1 and a in Table 2) and the preferred embodiments (see Table 5). '·.

109822/1813

■ T * b e I 1

(Data in "ft);

a * b C. • ' _i d e. / ' f , g,, ■. H "'' ..V- '". 7 ι
2 CO
N) Sodium nipolyphosphate
Nawium oleate 7th
2 cloudy
not homogeneous 7th
2 7th
2 7th
2 7th
2 7th
2 7th
2 7th
2 7th
2 _ Diethanolamine
(O
cd triethanolaniine
^^ «■« ■
N> triisopropanolamine.
Butyldiedianolamia - 1 1 1.5 0.6 0.6 1 OO diethylene glycol moao-
_ *. .buiyläüier
*** Hxandiol-IG
Methylpentane jiol-2,4
Ethyl octanediol -3.5 - 1 0.6 0.5 cloudy
inhomogeneous solution clear
homogeneous cloudy
inhomogeneous clear
homogeneous clear
homogeneous clear
homogeneous' clear
homogeneous clear
homogeneous clear '
. homogeneous
ί - ,Viscosity
?! high
viscous - low
viscous low
viscous low
viscous low
viscous low -
viscous, low
viscous "T 1
^J · cleaning effect
3 i (2 «& active ingredient) not
sufficient not
sufficient c Well j "good not
sufficient c Well Well

cn

Tabel

(Data in ° fo)

"a V b C. d e f G Triisopropanolamine 2 2 2 2 2 2 2 Sodium tripolyphosphate 8th 8th 8th 8th, 8th secondary ammonium phosphate .-..- ■ · 8th Hexametaphosphate
- - Well 10 Sodium oleate 2 2 2 Sodium Valley Trees 2 Potassium Castinol Soap 2 ■ ■. ■ Sodium alkyl benzene sulfonate Fatty alcohol (C ₁₆ _ ₁₈₎ · 12 EW "2 Cleaning effect not
sufficient c not
sufficient not
aüsreicliendi
' ^: · J not
sufficient not ;
sufficient not . -
sufficient

- 11 -

T a at 1 e

; ./ (Information i D. C. d ■ ". - * f β 5 6th 8 ^: 8th e 15th ίο Sodium tripolyphosphate 5 4th 2 8th 12th ■ 4 5 Sodium oleate 2 2 ί; '4 _: 4 2 10 Triisopropanolamine clear
homogeneous clear ;
homogeneous Was
homogeneous clear
homogeneous [£; ■; '■' floor
sentence floor
sentence solution low
viscous low
Viscous low
viscous Viscous clear
homogeneous ..- - viscosity sufficient Well
■ -. , - - Well sufficient low
viscous Well. - the end"! .
reaching Cleaning effect Well

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1Ö9822 / 1813

Claims (2)

Claims. 1) Procedure for removing the preservation from painted and metallic Objects, preferably by means of steam blasting devices, thereby marked- ,, that the preserved surfaces with a Reinigungsiö'süngj, the Älkalioleate, Alkali tripolyphosphat and such Alkanolamines and / or polyalcohols, which are a carbon, " . substance: oxygen ratio between 5 and 4.5, in a ratio of 1: (0.6 to 6) t contains (0.2 to 1.5), in a concentration corresponding to 0.5 to 5 % pesticide, Temperatures above 70 ° G, preferably above 80 ° C, are treated, 2) Method according to claim 1, characterized in that the Treated surfaces with a cleaning solution in which the proportion of alkali metal tripolyphosphate is the same or greater than the proportion of the alkali metal. Documents (Art. 7 § \ Abs. 2 Ur. 1 Sentence 3 of the amendment «« «·. V.4.9. TSfc / 13 - 109822/1813 Henkel & CIeG mb H 7 '"-..- Patent department . B 3312 - - ■■ "'■■ ■ - - 13 A method according to claim 1 and 2, characterized in _t that in the treatment of ¹ konservier th surfaces mittelsV steam cleaning equipment the lye container with a cleaning solution containing 1 "to 10 $ Alkalioleati β to 14 ^ alkali metal tripolyphosphate and 0.5 to 8 ^ alkanol amines and / or polyalcohols with a carbon: S-aü & r st off "ratio between 5 and 4> 5, are charged * 0 V ^ H e η ke 1 β CIe. GmbH ppa. ■ "'-; 7 ■" ■ - ■! «A.7 /" ^: -. "" -._-. · ". ^_:: (Dr. Arnolay) (Dr-. Qlasmänn)