Classifications

• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
  • C11D17/0047—Detergents in the form of bars or tablets
  • C11D17/0052—Cast detergent compositions
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D10/00—Compositions of detergents, not provided for by one single preceding group
  • C11D10/04—Compositions of detergents, not provided for by one single preceding group based on mixtures of surface-active non-soap compounds and soap
  • C11D10/042—Compositions of detergents, not provided for by one single preceding group based on mixtures of surface-active non-soap compounds and soap based on anionic surface-active compounds and soap
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
  • C11D17/0047—Detergents in the form of bars or tablets
  • C11D17/006—Detergents in the form of bars or tablets containing mainly surfactants, but no builders, e.g. syndet bar

Definitions

• the invention relates to a synthetic soap containing at least one higher fatty acid derivative.
• Synthetic soaps are known per se.
• the fatty acid derivative they contain in general at least sodium stearate, which is present in a mixture of sodium salts of higher fatty acids containing 8 to 20 carbon atoms.
• This mixture is a so-called solid white sodium soap and is usually preferably obtained from a mixture of essentially coconut oil and tallow.
• a water-soluble salt of a synthetic organic cleaning agent may be present in the synthetic soap.
• Such a salt of a synthetic organic cleaning agent is, for example, the sulphuric acid reaction product of alkane compounds containing 10 to 18 carbon atoms having preferably straight chains.
• the known synthetic soaps therefore always contain a considerable amount of a natural soap mixture. Because such natural soap mixtures are obtained by boiling natural oils and/or fats with hydroxide solution, in particular sodium hydroxide solution, the soap mixtures obtained have a certain alkalinity which is very detrimental for the skin.
• Said alkalinity is therefore also present in synthetic soaps containing a portion which consists of natural soap.
• a synthetic soap has now been found which is completely free of alkaline constituents and which can therefore be tolerated very well by any type of skin.
• the invention is characterized in that the synthetic soap consists of a mixture of at least one fatty acid containing 14-18 carbon atoms, an alkali metal salt of an alkane sulphate containing 10-14 carbon atoms and/or a mixture of alkanesulphonates containing 13-16 carbon atoms.
• the synthetic soap according to the invention also contains a softening constituent.
• This constituent consists preferably of an alkylene glycol; more particularly, propylene glycol.
• Other polyhydric alcohols can, however, also be used, in particular glycerol.
• the soap also to contain an anion-active emulsifier, in particular sodium cetyl- stearylsulphate (trade name Lanette E) as well as a fatty alcohol as emulsifier, preferably cetyl alcohol.
• alkali metal salt of an alkane sulphate use is advantageously made of sodium lauryl sulphate.
• the present synthetic soap has the important property of remaining afloat on water; this property is inherent in the composition.
• composition which is to be preferred inparticu- lar is the following:
• the synthetic soap according to the invention may also have the following composition:
• the synthetic soap composition may also contain an agent which makes it opague.
• an agent which makes it opague Preferably this will be titanium dioxide.
• the amount of titanium dioxide to be added to the soap is usually 0.1 to 0.3 % by weight, more particularly 0.2% by weight.
• the invention also relates to a method for preparing a synthetic soap according to the invention, which method is characterized in that a mixture of stearic acid, sodium cetyl stearyl sulphate and optionally titanium dioxide is added to a mixture of stearic acid, cetyl alcohol and a softening agent: in particular an alkylene glycol and/or glycerol at elevated temperature, and that sodium lauryl sulphate and then a mixture of alkanesulphonates containing 13-16 C atoms is added to the mixture obtained at elevated tempera- rature and the mixture formed in this manner is poured into moulds and allowed to cool.
• a softening agent in particular an alkylene glycol and/or glycerol
• This method differs from known methods for the preparation of soap in that the mixture formed is liquid at elevated temperature and can easily be poured into moulds in which the soap mixture cools down.
• the soap mixture formed is on the other hand ground to form a homogeneous mass and extruded, in general by means of a device intended for forming soap into blocks. After the blocks have been formed, the extruded bar is cut into pieces and moulded in a known soap press in order to shape the soap mass into the desired form.
• the method of the invention is therefore completely different from the known methods.
• a synthetic soap according to the invention is formed by a method in which, on the basis of the final weight, a mixture of approximately 2% by weight of stearic acid, 1-20% by weight of sodium cetyl stearyl sulphate (Lanette E), and also optionally 0.1-0.3% by weight of titanium dioxide is formed and added to a mixture of 18-58% by weight of stearic acid, 1-20% by weight of propylene glycol and 1-20% by weight of cetyl alcohol, the mixture formed is melted and 20-60% by weight of sodium lauryl sulphate, followed by 1-10% by weight of a mixture of alkanesulphonates containing 13-16 carbon atoms is added at elevated temperature, whereafter the mixture is poured into moulds and allowed to cool.
• a mixture of approximately 2% by weight of stearic acid, 1-20% by weight of sodium cetyl stearyl sulphate (Lanette E), and also optionally 0.1-0.3% by weight of titanium dioxide is formed and added to a
• the synthetic soap according to the invention is preferably formed by a method in which, on the basis of the final weight, a mixture of approximately 2% by weight of stearic acid, 0.1-2% by weight of sodium cetyl stearyl sulphate (Lanette E) as well as optionally 0.1-0.3% by weight of titanium dioxide is formed and added to a mixture of 18-58% by weight of stearic acid, 1-7 % by weight of glycerol and 1-20% by weight of cetyl alcohol, the mixture formed is melted and 10-50% by weight of sodium lauryl sulphate, followed by 1 :- 20% by weigt of a mixture of alkanesulphonates containing 13-16 carbon atoms is added at elevated temperature, whereafter the mixture is poured into moulds and allowed to cool.
• a mixture is formed in a boiler from approximately 34 kg of stearic acid, 10 kg of cetyl alcohol and 8 kg of propylene glycol while stirring and the mixture formed in the fast mixer is gradually added thereto.
• the temperature of the boiler is increased until the mixture has a temperature of approx. 100°C and is in the molten state.
• This mixture is then cooled to 55-90°C, preferably 70°C, colorants and perfumes are added if desired and the mixture is poured out into moulds, whereafter the mixture is allowed to harden.
• Example I is repeated, but the propylene glycol is replaced by glycerol.
• An intimate mixture is first formed in the fast mixer from approximately 2 kg of stearic acid, 1 kg of sodium cetyl stearyl sulphate (trade name Lanette E) and 200 g of titanium dioxide.
• the temperature of the boiler is increased until the mixture has a temperature of approx. 100°C and is in the molten state.
• This mixture is then cooled down to 55-90°C, preferably 70°C, colorants and perfumes are added if desired and the mixture is poured out into moulds, after which the mixture is allowed to harden.
• the moulding of soap with different colours present in layers is possible both with the mixture obtained according to Example I and the mixture obtained according to Example II by allowing the first layer to harden in the mould and pouring the next layer with a different colour onto it, the mixture having a temperature of 55-90°C, preferably 70°C.
• This procedure can be repeated until the desired number of layers is obtained.
• the multicolour soap formed has good adhesion of the layers to one another.
• the synthetic soap according to the invention has an attractive appearance, i.e. is not dull, while the soap also feels pleasant.

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• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Wood Science & Technology (AREA)
• Organic Chemistry (AREA)
• Detergent Compositions (AREA)
• Cosmetics (AREA)

Applications Claiming Priority (2)

Publications (2)

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ID=19847787

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Cited By (8)

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• 1987
  • 1987-03-17 EP EP87200486A patent/EP0239165A3/de not_active Withdrawn

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