DE2261030A1 - DETERGENT FOR CAR WASHING - Google Patents

Description

concerning
Detergents for washing cars

The invention relates to liquid car wash detergents which are phosphate-free and biodegradable. The cleaning agents according to the invention are primarily intended for use in the garage or in car washing systems with coin-operated machines. Such systems, which are set in motion by a coin-operated machine _P are a necessary addition to the otherwise "usual, belt or tunnel systems" , They generally work at a lower cost for the car owner otaa © .tlaB eULö cleaning would be less intensive.

On the other hand, however

means in the eiaea or Mach & hurry is s-ucfo » ά & Β äen washing brushea and -wqU cleaning agent!" υ-iiiEittslbs-r will », as the. befeaaaten

m MMi & if @ rtfenä $ teö cleaning n 'M & $ 8itht certain' Iaehtei3.e _s oils IFt- "öieger .Bf st @ B @ dss aias > mn§ process enös ü i ©

bast all Kioaphate

and contain non-biodegradable wetting agents, the user comes into conflict with current aspirations to avoid environmental pollution.

The invention is therefore based on the object of creating a liquid car cleaning agent that is phosphate-free and is biodegradable and also develops little foam and works economically.

The inventively provided — provided phosphate-free, Biodegradable, liquid car cleaning agent is composed of the following components;

(a) a nonionic liquid surfactant Agent that is an alkoxylated linear aliphatic alcohol is;

(b) a cellulosic compound;

(c) a hydrotrope;

(d) a soil suspending agent j

(e) a moldicide and

(f) water.

The cleaning agent according to the invention has proven to be highly effective and is particularly suitable for coin-operated machines operated car wash systems »

As can be seen, the means according to the invention is complete phosphate-free, biodegradable and only slightly foaming. The agents according to the invention represent concentrates that are generally composed as follows: J 2-5 »preferably 3-4 parts by weight of nonionic surfactant Middle;

0.2-1.0, preferably 0.3-0.7 parts by weight of cellulose compound;

2 - 6 »preferably 3-5 parts of kydrotrope; 1-5, preferably 2-4 parts by weight of suspending agent for Earth or dirt;

3 0 9 8 2 5/1067

BATH ORIGINAL

0.2-1.0, preferably 0.3-0.5 parts by weight of moldicide; 82-95, preferably 84-91 parts by weight of water.

The nonionic surface-active agent present according to the invention corresponds to the general formula:

RO (A) _n H

Wherein R is a linear alkyl group having 8-20 carbon atoms or the organic radical of a linear aliphatic Alkoholes, and A represents the oxyalkylene s-Bht while η be a number '- indicated that is so large that the oxyalkylene groups as 55 percent by weight of the surface active! Make up means. In particular, R stands for the organic radical of a linear aliphatic alcohol with 8-20, preferably 10-20, carbon atoms and A stands for either the oxyethylene group or any or a balanced mixture of oxyethylene and oxypropylene groups in a weight ratio of about 1: 2-7 :1.

These surface-active agents are prepared under the usual conditions for oxyalkylation, i.e. at a temperature of about 100 to 175 ° C, a pressure of about 2.4 to 6.3 at and in the presence of a conventional oxyalkylation; -.- · katalysetörs by reacting the alkylene oxide with the alcohol. In the manufacture of these surfactants, a typical distribution of alcohols is made from commercial ones Sources within the specified limits generally show the following picture:

0-10 % C _Q : 0-10 % C _g ; 0-95 % C ₁₀ ; 0-95

0-95 % C ₁₂ ; 0-95 % C ₁₃ ; 0-95% C ₁₄ ; 0-95 % C ₁₅ ;

0-95 % C ₁₆ ; 0-50 % _C17 ; 0-50 ° / o C ₁₈ ; 0 - Ί0 % C ₁₉ and

0-10% CpQ. An alcohol or an alcohol mixture with 12 to 16 carbon atoms represents at least 70% by weight of the mixture. These agents and their preparation are described in greater detail in US Pat 664.

309825/1067 BADOBiGiNAL

The cellulosic compound used as an auxiliary suspending agent for Soil or dirt acts is preferably carboxymethyl cellulose or hydroxymethyl cellulose, but can also Be carboxyethyl cellulose.

The hydrotrope or solubilizer facilitates this Solubility of the nonionic surfactant in the aqueous concentrate. Suitable hydrotropes that Lower monohydric and polyhydric alcohols with about 2 to 4 carbon atoms and 1 to 3 hydroxyl groups are possible here, such as: ethylene glycol, propylene glycol, isopropanol, Butanol, isobutanol, diethylene glycol and the like and mixtures thereof. Propylene glycol is preferred, Isopropanol and mixtures thereof.

The primary soil suspending agent is also preferably a corrosion inhibitor. Means that meet this condition are alkali salts, preferably sodium or potassium salts with either organic or inorganic acids. Examples are the sulfates, nitrites, gluconates, citrates, lactates, tartrates, glucoheptonates, MetaXsilicates, Nitrates, bisulfates and the like of potassium or sodium. Sodium sulfate is preferred.

The concentrate also contains a moldicide or anti-mold agent incorporated, which prevents the formation of mold, which would otherwise clog the filters that are in the Supply facilities for the detergent are usually built in. Anyone can do this, mold growth preventive agents can be used, such as sodium benzoate, quaternary alkyl ammonium chlorides, sodium pentachloropnenate and the like, with sodium benzate being preferred.

Since usually the nonionic surfactant]. is not compatible with water, one works at the

309825/1067 BAD ORIGINAL

- 5 - ■ Position the concentrate as follows:

At room temperature, the suspension agent for dirt, the anti-mold agent, the Cellulose compound and the hydrotrope dissolved in the water within 15 to 40, usually 20 to 30 minutes. While continuing to stir the nonionic surfactant is then added which then goes into solution rapidly.

Surprisingly, it has been found that the invention Agents in very dilute aqueous solution can be used. In general, only 1 part by weight of concentrate is required 30 to 150 parts by weight of water each to produce a liquid cleaning agent that is effective in the appropriate environment is. For comparison, one has to part with the usual cleaning agents which contain analogous surface-active agents Apply concentrate to 25 parts of water to be effective Obtain detergents. .

When washing automobile bodies or the like with the. Cleaning agents according to the invention are sprayed on this

preferably at a temperature of 38 to 55 ^° C.

The examples in which the parts are parts by weight further illustrate the invention.

B ice ρ i el 1

It was made into a liquid car detergent concentrate from the following Components manufactured

BATH

- 6 -

309 825 / 10-81

Component quantity

Nonionic surfactant 3.4 Medium 1) Cellulose compound A 2) 0.5 Isopropanol as a hydrotrope 4.0 Sodium sulfate 2.9 Sodium benzoate 0.4 water 88.8

100.0

To prepare the concentrate, the sodium sulfate, the sodium benzoate, the cellulose compound and the isopropanol are dissolved with constant stirring in water, which takes about 20 to 30 minutes. The nonionic surface-active agent is then added, with continued stirring, and it quickly dissolves goes. Once a clear solution has formed, the concentrate is ready for use.

Example 2

According to Example 1, a liquid car cleaning agent concentrate made from the following components:

1) A nonionic surfactant made by condensing a mixture of C 1 -C 4 alcohols with a mixture of ethylene oxide and propyl oxide in a weight ratio of 1.5: 1; the product contains about 50 Ge, ethylene oxide, about 30 % propylene oxide and about 20 % residual alcohol.

2) carboxymethyl cellulose

309825/1007

Component, quantity

Nichtionis.ch.es surfactant 1) 4.0

Cellulose compound A 0.3

Hydrotrope 2) 5.3

Sodium sulfate -2.1

Sodium benzoate 0.4

Water 87.9

100.0

1) A nonionic surfactant made by condensing a mixture of C, p-C ^ 5 alcohols

with a mixture of ethylene oxide and propylene oxide in a weight ratio of about 3: 1, the product ■■ .-. Contains about 60% by weight of ethylene oxide, about 20% by weight of propylene oxide and about 20% by weight of alcoholic residues.

2) A 3: £ mixture of isopropanol and propylene glycol. Example 3

According to example 1, a liquid cleaning agent concentrate for cars is produced from the following components:

Component 'quantity

Nonionic Surfactant 1) 3.0

Cellulose Compound B 2) 0.6

Diethylene glycol as hydrotrope 3.7

Sodium gluconate 2.3

Sodium benzoate 0.3

V / ater. 90.1

1) A nonionic surfactant prepared by condensing a ^ mixture of ethylene oxide and

309825/1067 BAD original

-B-

Propylene oxide in a weight ratio of about 1: 2 with a mixture of C ₁₂ -C ₁ C alcohols, the resulting product containing about 25% by weight of ethylene oxide, about 50% by weight of propylene oxide and about 25% by weight of alcoholic residues .

2) hydroxymethyl cellulose.
Example 4

The example shows the use of the cleaning agent concentrate according to the invention.

In a standard mixing vessel one volume of the concentrate of Example 1 at 49 ⁰ C is diluted with 49 VoI, parts by water, the mixture is thoroughly stirred until a uniform solution is formed, which is then ready for use.

A sample of this solution is kept in a suitable vessel at about 46 C and fed to a spray nozzle, which the solution is sprayed under a pressure of 44 to 45.7 kg / cm and at a rate of about 106 l / min. A Car sprayed with this aqueous solution is carefully cleaned within 15 seconds.

Claims

_BA D 309825/1067 '

Claims (4)

Claims (1) Detergent for car washing in the form of a "biological decomposable, phosphate-free, liquid car wash cone consisting of: a) 2 to 5, preferably 3 to 4 wt -.% of a nonionic surfactant of the general formula RO (A) _n H wherein R is the organic radical of a linear aliphatic alcohol having 8 to 20 carbon atoms or mixtures of such alcohols, A is either the oxyethylene group or for oxyethylene and oxypropylene groups in a weight ratio of 1: 2 to 7: 1 and η represents a number which is large enough to ensure that A constitutes 55 to 80 percent by weight of the surfactant; b) 0.2 to 1.0, preferably 0.3 to 0.7% by weight of carboxymethyl cellulose, carboxyethyl cellulose or Hydroxymethyl cellulose; c) 2 to 6, preferably 3 to 5 parts by weight of one Hydrotrops in the form of a monohydric or polyhydric alcohol with 2 to 4 carbon atoms and 1 to 3 hydroxyl groups or a mixture of these Alcohols; - 10 - 30982 5/10 67 - ίο - d) 1 to 5, preferably 2 to 4 parts by weight of one Alkali salt as a suspending agent for soil or dirt; e) 0.2 to 1.0, preferably 0.3 to 0.5 part by weight. a mold preventing agent and f) 82 to 95, preferably 84 to 91 parts by weight of water. 2. Cleaning agent according to claim 1, characterized in that in the general formula R for organic radicals of a mixture of linear aliphatic alcohols with 12 to 15 carbon atoms and A is a Means mixture of oxyethylene and oxypropylene groups. 3. Cleaning agent according to claim 1 or 2, characterized in that the suspending agent for soil or dirt the sulfate, nitrite, gluconate, citrate, lactate, Tartrate, glucoheptonate, metasilicate, nitrate or bisulfate of potassium or sodium. 4. Cleaning agent according to one of claims 1 to 3 » characterized in that the Schiainelbilduug Contraceptive agent is sodium benzoate. 309825/1 067 '