DE2751053A1 - LIQUID SOAP - Google Patents

Description

The invention relates to a liquid soap and a method for its production, in particular to one such liquid soap, which is more common mainly for use as toilet soap hand cleaners in soap dispensers Suitable for use in hotels, canteens, grocery stores, Offices, hospitals, industries and households can be attached.

In the DT-PS ........ (P 23 25 206.4) a liquid soap is described and claimed that is 12 to 40 percent by weight Potassium soaps of saturated fatty acids with predominantly 12, 16 and 18 carbon atoms in the molecule, 20 to 40 weight percent glycerin and 20 to 55 weight percent water. The liquid soap is a creamy liquid good consistency that gives a good feeling after washing and does not tend to dee at the outlet opening To dry up the dispenser!

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-Y-

Ea has now been found that a liquid soap with practically the same good properties, and in some With regard to even better properties, i.e. with lower hardness and better flushability can be by adding at least half of the glycerol by 0.25 in the formulation of the patent mentioned up to 0.50 parts of its weight by an alkylene glycol from the series propylene glycol, ethylene glycol and / or di- and triethylene glycols is replaced.

The preferred alkylene glycol is diethylene glycol.

The liquid soap according to the invention therefore contains essentially 12 to 40 percent by weight of saturated potassium soaps Fatty acids with predominantly 12, 16 and 18 carbon atoms in the molecule, 0 to 20 percent by weight glycerin and 20 to 5 percent by weight of an alkylene glycol the group 1,3-propylene glycol, ethylene glycol and / or di- and triethylene glycols, the remainder being water. The liquid soap according to the invention preferably contains 0 to 15 percent by weight Glycerin and 15 to 5 percent by weight of the alkylene glycol.

The fatty acid component can also contain other fatty acids in smaller proportions, but in order to achieve a satisfactory one To achieve foaming behavior, the proportion of C ^ p fatty acid lies desirably slightly above the amount of CLg and CjQ fatty acids in the composition. All percentages relate here to the weight of the finished product, unless stated otherwise.

The potassium soaps of fatty acids with predominantly 12 carbon atoms in the molecule are preferably derived from commercial quality lauric acid, which can also contain C ^ _Q and C ... fatty acids in smaller proportions. Other suitable sources of C 1-4 fatty acids are fatty acids derived from various nut oils, such as coconut oils

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and palm kernel oils, especially those fractions which are fractionated by lower fatty acid components Distillation have been freed. The liquid soap according to the invention preferably contains about 7 to 20 percent by weight Potassium laurate.

The potassium soaps of fatty acids with predominantly 16 and 18 carbon atoms in the molecule are preferably derived from commercial grades of stearin, that too May contain fatty acids of different chain lengths in smaller proportions. Another suitable source for Cjg-C. | g fatty acids form the fully hydrogenated Tallow fatty acids and other animal fats with high levels of C.g-C | g fatty acids. Preferably amounts the proportion of potassium C.g-C.g fatty acid soaps to about 5 to 20 percent by weight of the liquid according to the invention Total soap.

The liquid soap according to the invention can further contain the usual additives, as desired, for example a suitable perfume, coloring agent, preservative, thickener and germicidal agent. In a preferred embodiment of the invention, the product contains free fatty acids in an amount of up to 10, preferably 2 to 5 % of the total composition in order to impart superfatting properties to it. A particularly suitable superfatting agent is stearic acid, which can be used alone or in conjunction with other superfatting auxiliaries known per se. A further improvement in the product, although not essential to the invention, can be obtained by adding a small amount of a thickener. A desirable viscosity range is between about 1,000 and 2,000 cP at 10 to 25 ^° C. The use of a thickener can be minimized by the presence of a small amount of sodium soap

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be lowered. The exact amount needed to make the Controlling the consistency of the product is not critical and is obvious to the expert «

The creamy liquid soap according to the invention can be prepared as follows:

Glycerin and / or alkylene glycol and water in suitable weight ratios are added to a stirred tank with slow stirring and mixed until a homogeneous mixture is obtained. The mixture is then ^{heated to about 65 to 85 0} C and then the required amount of potassium hydroxide is added .

With slow stirring, the required amount of fatty acid is then gradually added in two stages, e.g. become the lower fatty acids, the C ^ fatty acids include, first added with slow stirring until a clear solution is obtained, and then the higher Fatty acids, which include the C ^ g-C-g fatty acids, below Further stirring was added until a clear solution was obtained. Then there is no more heating and other components can can be added. After the last ingredient has been added, the product is left very carefully in the container cool slowly, i.e. with a temperature drop of no more than 10 ° C per hour.

If a thickener is used, it should expediently be mixed with part of the glycerine and / or glycol-water mixture be mixed. Any sodium hydroxide required can be added along with the potassium hydroxide solution.

Slow stirring and careful cooling are important measures in the process to ensure the formation of a fine suspension to favor potassium stearate crystallites, which are clearly distinguishable under the microscope and that cause the product to look pure white.

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Rapid cooling, on the other hand, tends to cause flocculation Potassium stearate to cause that in particular the container wall separates as white lumps. A suitable apparatus for carrying out the method according to the invention is a double-walled mixing container made of stainless steel, equipped with a slowly rotating Agitator. The double wall of the mixing vessel creates a means of heating with indirect steam or hot water and also a means of cooling slowly and carefully after the steam or hot water is turned off and the container with its contents by leaving it to stand under room conditions or with the aid of a Leave the coolant to its own devices.

The invention is further illustrated by the following non-limiting examples.

Examples I - V

The following creamy white liquid soaps have been put together:

Addition

Coconut fatty acid Lauric acid (technical grade) Stearic acid (technical grade) Glycerine Propylene glycol Diethylene glycol Triethylene glycol Potassium hydroxide (36 %) Sodium hydroxide (50 %) Hydroxyethyl cellulose (thickener)

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I. 1 II III
Weight-96 IV V 3.45 3.45 3.45 3.45 3.45 4.70 4.70 4.70 4.70 4.70 6.85 6.85 6.85 6.85 6.85 5.0 0.0 - - - - - - 10.0 - 5.0 5.0 10.0 - - - - - - 10.0 7.82 7.82 7.82 7.82 7.82 0.24 0.24 0.24 0.24 0.24 0.65 0.65 0.65 0.55 0.55

Natriumtetraborat- _n ~ _{A n} ", _{n. n} , _{A n} ,, decahydrate ° » ³⁴ ° ^'34 °» ³⁴ ° » ³⁴ °' ³⁴

Perfume 0.30 0.30 0.30

Water 65.65 65.65 65.65 66.05 66.05

The hydroxyethyl cellulose was dispersed in the glycol and slowly added to the 50 % of the water in the container with slow mixing. The sodium tetraborate was then added and mixing continued until a clear solution was obtained and then the remaining water was added.

The mixture was heated to 75 ° C and potassium hydroxide and sodium hydroxide were then added with stirring. Coconut fatty acid, lauric acid and stearic acid were added in that order with stirring. With continued stirring, the product was slowly cooled. Perfume was added as the temperature reached one Value below 55 ⁰ C had reached.

Product features

Viscosity (cP) at 10 ^° C. and 20 ^° C. 1000-1500 free fatty acid 2.5

Total fatty acids 15.0

The above compositions were stable for 3 months when stored at 35 ° C.

Test samples showed no signs of skin irritation, an unpleasant odor, or an uncomfortable feeling on the hands or after use. In-use foam properties were measured on 0.7 g samples of the product on lightly soiled ones Hands determined using water at 18 ° GH. For comparison, a 10% conventional Toilet soap solution used.

All compositions I - V were the 10 # overfatty Superior toilet soap solution.

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mm Ji ^

The soap compositions were available in various commercial Soap dispensers kept. They were not clogged even after 25 days of non-use.

Example VI

As in Examples I - V, the following creamy white liquid soap was produced:

composition VI Weight -96 water 53.2 Glycerin 10.0 Diethylene glycol 5.0 K-Laurate 13.2 K palmitate 5.8 K-stearate 5.8 Na-Laurat 0.8 Na / K soap of other fatty acids
(C ₆ ; C ₁₀ ; C ₁₄ ; C ₁₇ )
free stearic acid 1.8
3.5 Perfume, preservatives,
Thickener 0.9 Example VII

The following compositions have been tested for their "drying effect" and physical stability tested:

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VII ₁ VII ₂ 45 VII ₃ 45 viii, 70 3 A. 3 B. C. 45 3 D. 3 E. 3.15 3. 70 3. 70 3. 85 ϋ .45 4th .45 3. 70 4th .45 4th .45 4.70 4th 85 4th 85 4th 6th .70 6th .70 4th 85 6th .70 6th .70 6.85 6th 6th 6th .85 .85 6th .85 .85 10.0 _ ■ Μ • _ mm

Composition (weight percent) Coconut fatty acid Lauric acid (technical quality) Stearic acid (technical quality) Ethylene glycol Diethylene glycol -10.0 - - - ■ - Triethylene glycol - - 10.0 - - _# - Propylene glycol - - - 10.0 Polyethylene glycol 200 - - - - 10.0 - - Polyethylene glycol 400 - - - - - 10.0 - Polyethylene glycol 600 - - - - - - 10.0 - Hexylene glycol - - - - - - -10.0

Sorbitol KOH (36 %) NaOH (50 %) hydroxyethyloellulose borax, decahydrate water

- - - - - - - - 10.0 { 7.82 7.82 7.82 7.82 7.82 7.82 7.82 7.82 7.82 0.24 0.24 0.24 0.24 0.24 0.24 0.24 0.24 0.24 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55 to 0.34 O.34 O.34 O.34 0.34 0.34 O.34 O.34 O.34 cn 66.05 66.05 66.05 66.05 66.05 66.05 66.05 66.05 66.05 0
cn
Lu

The tendency to dry out is examined with a test in which a quantity of the product is kept in open Petri dishes for 5 days. The water loss is measured and the hardness of the residue is determined. The results of this investigation can be found in the following table:

Tabel

Hardness of the residue after 5 days at 25 ° C / 3096 Stability at Together at 2O ° C / 65% relative humidity 35 ⁰ C after 1 month settlement relative humidity soft Well VII ₁ very soft soft Well VII ₂ very soft soft Well VII ₃ very soft hard Well VH ₄ moderately soft hard unstable A. hard hard unstable B. hard hard unstable C. hard hard unstable D. hard not determined unstable E. hard

Only the compositions VII ₁ - VII. According to the invention appear to be sufficiently stable and have no serious tendency to dry out under normal conditions .

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Claims (1)

Claims Liquid soap with essentially 12 to 40 percent by weight potassium soaps of saturated fatty acids with predominantly 12, 16 and 18 carbon atoms in the molecule, according to patent (Patent application P 25 25 206.4), characterized in that it contains 0 to 20 percent by weight of glycerol and 20 to 5 percent by weight of an alkylene glycol from the group consisting of propylene glycol, ethylene glycol and / or di- and Contains triethylene glycol. Liquid soap according to claim 1, characterized in that that the alkylene glycol is diethylene glycol. Liquid soap according to Claim 1 or 2, characterized in that it contains 7 to 20 percent by weight of potassium laurate contains. Liquid soap according to one of Claims 1 to 3, characterized characterized in that it contains 5 to 20 percent by weight of potassium-saturated Cjg-C.g fatty acid soap. Liquid soap according to one of claims 1 to 4, characterized in that it additionally contains up to free fatty acids contains up to 10 percent by weight of the total composition. Liquid soap according to one of the preceding claims, characterized in that it has a viscosity in the range from 1,000 to 2,000 cP, measured at a temperature of 10 to 25 ° C. 909815/0593