DE1921440A1 - Detergents and cleaning agents - Google Patents

Description

1921U0

O. 199 London

UNILEVER N.V.

Museum Park 1, Rotterdam / Holland

Detergents and cleaning agents

Priority: British Patent Application No. 20183/68, dated April 29, 1969

The invention relates to a liquid washing and cleaning agent.

It has been found that when an alkaline buffer is used in a liquid detergent and cleaning agent it is sufficient Amount is incorporated in order to generate adequate buffering during use, advantages result from this These advantages include improved dirt removal, especially of proteinaceous dirt

Wis, the— Paint removal, improved dirt prevention / deposition, improved "feel" of the solution, and improved Cleaning power of anionic and amphoteric surfactants.

Sodium tetraborate, borax, has been found to be surprisingly effective as a buffer. For example, it was found that other, more common alkali salts, e.g. alkali phosphate and carbonate, if used at the same pH (9), were less effective in removing dirt such as egg yolks, a mixture mainly of fat and protein. Another advantage of using tetraborate is its resistance to the effects of

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Calcium and magnesium ions, which are present in hard water and often in dirt. Such salts often contribute to the cause other buffers show a marked drop in pH as a result of precipitation or complex formation.

A liquid detergent and cleaning agent is common applied in diluted form. In order to provide sufficient borate buffer when diluted, a liquid wash and Cleaning agents usually contain more than 5% by weight of borate However, sodium tetraborate cannot be completely included at such concentrations. Suspensions or non-aqueous solvent systems had to be accompanied by disadvantages such as difficulty in approach, Opacity and costliness are used.

It has now been found that an amine borate is advantageous can be incorporated into a liquid detergent and cleaning agent. With an amine borate, the problems of incorporation are eliminated of more than 5% by weight of borate into a liquid Detergents and cleaning agents surprisingly reduced «,

The invention therefore creates a liquid detergent and cleaning agent with a weight content of more than about 5% of an amine borate. Ui ₃ W ₀ I ₁ I, a preferred form of the invention is a clear liquid agent also be obtained advantages of an amine borate about borax in tarnish agents and such agents are included within the scope of the invention. A liquid laundry detergent and cleaning agent according to the invention can contain, by weight, between $ 5 and $ 75 of an amine salt, preferably between $ 10 and $ 40.

A preferred amine borate is derived from an amine with a pK ^ of about 9. Another preferred amine borate is derived from an amine with a boiling point above 90 ^° C. Particularly preferred amine borates are derived from alkanolamines. Monoalkanolamines are preferred over dialkanolamines. Preferred amines contain a C ₅ to _{C 2} alkyl chain. Synergistic foaming of such amines with anionic detergents can occur.

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Examples of suitable amines from which amine borates derived for use in compositions according to the invention include: ethanolamine, 2-amino-2— methylpropan-1-ol, propanolamine, isopropanolamine, diethanolamine, Μ, ΙΙ-diethylethanolamine, υ, ΐί-dimethylethanolamine, Benzylamine, 2-phenylethylamine, n-hexylamine, l \ F, N-dimethyl-noctylamine, Cyclohexylamine, and N, N-dimethyl-2-hydroxy-ndodecylamine.

It has also been found that the production of amine borates runs comparatively smoothly. For example, amine and boric acid can be mixed · boron oxide, BpO- *, can be used as a source of boronate when sufficient water is present. The chemical structure of Amine borates, especially in concentrated solution, is not known with certainty, although for dilute solutions it is assumed that the boration, Η, ΒΟ. , is present » For the purposes of the invention, an amine borate is defined to be a composition consisting of amine and boric acid or boric acid equivalent in a molar ratio of 1: 3 "to 1x1, preferably 1: 2.

Liquid washing and cleaning agents according to the invention are particularly suitable for use as dishwashing detergents, but they can also be used as shampoos, for example. There's nothing particularly palpable or with respect to the amount and type of surfactants which should be incorporated .. Suitable surfactants and other ingredients and suitable amounts can be found in the manuals, eg _e in the book of L.Chalmers, Domestic and Industrial Chemical Specialties , Leonard Hill, 1966. In general, a liquid washing and cleaning agent according to the invention will contain, by weight, 1 to 75% of an anionic, nonionic, zwitterionic or amphoteric surfactant or mixtures thereof.

Because of possible synergistic foaming between the anionic surfactant and the amine salt becomes an anionic Surfactant "rwitgBt" * preferred. If an anionic or

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amphoteric surfactant is used and a clear agent is required, the agent must contain less than 0.59ε ammonium ions by weight, less than 0.5 $ sodium ions and less than 2.5 $ potassium ions, unless polyols are included as solution favorers. Suitable polyols are ethylene glycol, glycerine and mannitol. Suitable amounts of polyol are between 1 and 10 $ by weight of the agent Wbm. Usually when an anionic surfactant is used the cation will be an amine.

The invention is further developed by the following examples explained.

Example Mr. 12 3 4 5 6 7

Ethanolammonium do de cyl-

benzenesulfonate 30 35 24 25 25 -

Sodium Lauryl Ether- ^

sulfate 3 AO. 4 5 5-

Octylphenol 1TT5 ÄO ** 7 - - - - -

Coconut oil ethanolamide - 5 3 - - - -

Ethanol 6 7 6 7 7 10 15

Ethanolammonium lauryl

sulfate - - - - - 29 20

Ethanolamine borate. 20 30 25 20 15 0 c t.yl-N, N-dimethylamine-

borate - - - - 23 -

H, N-dimethyl-2-hydroxy-

dodecylamine borate - __ «___ 20

Water to 100

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-5- Example no. ' 8 9 10 11 12 13 1-

Ethanol ammonium dodecylbenzene

sulfonate 24 24 24 24 40 24

Sodium lauryl ether sulfate

3 AO * 4 4 4 4 4

Ethanolammonium lauryl ether-

sulfate 3 AO - - - - 25th 4th - - Ethanol 5 5 VJl vn 16 15th 5 10 urea 7th 5 3 5 - - 3 - Coconut oil ethanolamide 4th 4th 4th 4th 4th 4th Ethanolamine borate 10 15th 20th - - - 35 Isopropanolamine borate - - - 15th - - N, N-diethylethanolamine borate _ _ - 20th -

Water to 100

Commercially only available as the sodium salt; it would be preferable to use an amine salt.

11.5 AO means that the octylphenol with Äihylenoxyd was condensed until an average of 11.5 moles of ethylene oxide was absorbed for each mole of octylphenol.

All of the agents given in Examples 1-14 had excellent soil removal properties, especially when the soil contained protein, e.g., egg yolk _{or the like}

Example 15

This example illustrates the soil removal capability agents according to the invention.

The times were measured with a Pliess apparatus which required various means of dirt removal The basic approach was a commercially available standard product, which by weight contained $ 24 sodium alkylbenzenesulfonate, 4 $ sodium lauryl ether sulfate 5 A and 3 $ Coconut oil ethanol amld. The tested means Af, A2 and A3

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contained 24 # ethanol ammonium alkylbenzenesulfonate,

496 sodium lauryl ether sulfate 3 AO, 4fi coconut oil ethanolamide

and 10.15 and 2O # ethanolamine borate.

The following conditions were applied:

dirt egg yolk Product concentration 0.25 # Flow rate 15 l / minute Solution temperature 45 ⁰ C Dirt thickness 0.003 cm

The results were:

product

What hardened it

Reason-
approach 24 ⁰ H A1 Il A2 Il A3 Il Reason ~
ansatζ 4 ⁰ H A1 ti A2 U A3 Il

Time for the difference in dirt removal

attempt

1 2

9.3 9.5

5.8 6.0

5.8 5.8

5.2 5.2

6.7
4.3
4.3
3.8

6.5

4.3

4.5 4.0

9.4 5.9 5.8

5.2

6.6 4.3 4.4 3.9

0.27 0.48

0.28 0.50

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-7- Example 16

The same agent used in Example 15 was tested for its ability to prevent redeposition of soil using a Chromoscan, which measures reflectance. Dirt (fat and flour) was in an O, 2 # igen Solution of the respective agent in water with a hardness of 24 ° and 40 ° C. is suspended. 10 g of dirt were used for 500 ml of solution used. Glass disks were immersed in the solution and the reflectance measured after removal. the Results follow (lower values indicate higher reflectance).

Product reflectance difference ($ 5)

Basic approach 939 76

A1 284

A2 127

A3 61

Example 17

A shampoo approach with improved paint removal capacity had the following composition by weight:

Ethanolammonium lauryl sulfate at $ 14

Laurin isopropanolamine 1 »5 $

Ethanolamine borate 1056 Water and perfume to 100

In all examples, the amine borates were prepared by mixing suitable amines and boric acid in a molar ratio of 1: 2. 3Ut ₀ Clear solutions could be prepared which, for example, contained 75% borate by weight, for example ethanolamine borate. Clear agents according to the invention could be prepared by adding surfactants to such solutions.

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Claims (2)

192U40 -8 patent claims 1, Liquid detergent and cleaning agent with borate / S content, characterized in that the borate is an amine borate and the agent is at least 5 wt, # des Contains amine borate. 2. Liquid detergent and cleaning agent according to claim 1, characterized in that the amine des Amine borate is an alkanolamine. 909846/1116