JP2009185139A - Transparent gelled soap and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transparent gelled soap, obtained using natural vegetable oils present in the natural world, that is excellent in foaming and detergency, is non-irritating to a skin, has refreshing feeling after hand-washing, and has good stability at a low temperature for a long period of time without addition of a gelling agent. <P>SOLUTION: This transparent gelled soap comprises (A) an olive oil of 30-100 wt%, (B) a palm oil of 0-25 wt%, (C) a castor oil of 0-25 wt%, and (D) a coconut oil of 0-30 wt%. The soap also contains (E) ethanol of 20-80 vol% to make it transparent and gelled. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a transparent gel soap and a method for producing the same.

Conventional techniques are classified into cosmetic soaps used for face washing and bathing, medicinal soaps used for hand washing, and laundry soaps used for washing clothes. Furthermore, when classified by shape, it is classified into solid, powder, liquid, and gel (gel). Among them, the gel shape is excellent in portability. Furthermore, the transparent gel soap has a unique high-class feeling and is considered to have a high commercial value and marketability.
An example of the technique regarding transparent gel soap is described in Patent Documents 1 and 2.

Japanese Patent Laid-Open No. 11-189788 JP 2007-254493 A

  However, those described in Patent Documents 1 and 2 use a wide variety of chemicals that do not exist in nature. Therefore, there is a possibility of various effects on the environment. There is also a problem that it is expensive. In addition, the manufacturing method is complicated and difficult to understand. Another problem is that conventional gel soaps are unstable at low temperatures.

  The present invention has been made to solve the above problems, and uses a natural gel that is stable even in a low temperature place, and provides a transparent gel soap excellent in detergency, foaming and usability. The purpose is to do.

  In order to solve the above problems, the transparent gel soap of the present invention contains 30 to 100% by weight of olive oil, 0 to 25% by weight of palm oil, 0 to 25% by weight of castor oil, and 0 to 30% by weight of coconut oil. It is characterized by that. Furthermore, the present invention is characterized in that an appropriate amount of ethanol is added until the saponification reaction is completed until the ethanol becomes transparent. Also, 30 to 100% by weight of olive oil, 0 to 25% by weight of palm oil, 0 to 25% by weight of castor oil, 0 to 30% by weight of coconut oil, 20 to 50% by weight of potassium hydroxide and water are mixed to 70 to 90 ° C. It is characterized by having a step of stirring while maintaining and a step of adding ethanol and stirring while maintaining at 60 to 70 ° C. at the end of the saponification reaction. Furthermore, the present invention is characterized by having a step of naturally cooling to room temperature after adding ethanol to form a transparent gel.

  According to the present invention, it is difficult to solidify at a low temperature, is stable such as not crystallizing at all, and is gelled without adding a gelling agent, thereby producing a transparent gel (gel) soap. Obtainable. Furthermore, the foaming and cleaning power are good, there is little skin irritation, and the effect of having a refreshing feeling after hand washing can be obtained.

  Below, this invention is demonstrated based on the embodiment.

  First, weigh out olive oil, palm oil, castor oil, coconut oil, potassium hydroxide, and water.

  The olive oil is preferably 30 to 100% by weight. More preferably, it is 40 to 90% by weight. If it is less than 40% by weight, it may become unstable at a low temperature and foaming may be worsened. On the other hand, if it exceeds 90% by weight, it may become unstable at a low temperature and the hand washing feeling may be deteriorated.

  Palm oil is preferably 0 to 25% by weight. More preferably, it is 5 to 25% by weight. If it is less than 5% by weight, it may become unstable at low temperatures. On the other hand, if it exceeds 25% by weight, the hand washing feeling may be deteriorated.

  Castor oil is preferably 0 to 25% by weight. More preferably, it is 5 to 25% by weight. If it is less than 5% by weight, it is unstable at a low temperature and the hand washing feeling may be deteriorated. Moreover, when it exceeds 25 weight%, it may become unstable at normal temperature and foaming may worsen.

  The coconut oil is preferably 0 to 30% by weight. More preferably, it is less than 5 to 12% by weight. If it is less than 5% by weight, it may become unstable and hard at room temperature and low temperature. Moreover, when it becomes 12 weight% or more, there exists a possibility of skin irritation.

  Potassium hydroxide weighs an equivalent amount of oil (saponification rate 100%) and dissolves in water. The amount of water required for dissolving potassium hydroxide is preferably 30 to 40% by weight based on the amount of oil. If it is less than 30% by mass, it may become hard, and if it exceeds 40% by weight, it may become soft. If it is 20% by weight or less, it becomes too hard, and if it is 50% by weight or more, it becomes too soft. On the other hand, if it is 50% by weight or more, it becomes hard at a low temperature and has poor recoverability.

  Prepare a mixture of olive oil, palm oil, castor oil and coconut oil. A potassium hydroxide aqueous solution is added to the mixed oil preheated to 70 to 80 ° C., and the mixture is stirred with a stirring rod while being kept at 70 to 90 ° C. Immediately after mixing, it becomes cloudy, but fine white particles gradually become a cotton-like lump and separate into a liquid one. The time at which the saponification reaction is completed is the end of the saponification reaction.

  After completion of the saponification reaction, 20 to 80% by volume of ethanol is gradually added to the amount to become transparent while stirring at 60 to 70 ° C. in order to obtain a transparent gel soap. When it becomes transparent gel, stop stirring and let it cool naturally to room temperature.

  Oils used in the present invention are those existing in nature such as olive oil, palm oil, castor oil, and coconut oil. Ethanol is easily produced by alcoholic fermentation of sugars and is used as a raw material for beverages and pharmaceuticals, so it does not adversely affect the human body. Moreover, it can manufacture in a short time because of the saponification reaction by heating. Furthermore, since the production method of the present invention can visually check the completion of the saponification reaction and visualize the production process, the production process can be easily managed.

  The present invention will be specifically described below. The purpose of the following tests is to demonstrate that a stable transparent gel-like soap can be used even in low-temperature places, has excellent cleaning power, foaming, and usability, and can be easily removed even when placed in a tube-shaped container. It is to be. Prior to the examples, the evaluation methods used in the examples will be described.

a) Stability test-Put a tube-shaped container filled with transparent gel soap after manufacture in a bucket containing ice at -1 ° C for about 1 to 5 hours. The stability of the transparent gel soap was judged visually and evaluated as follows.
○ ・ ・ ・ Good stability Transparent gel shape Δ ・ ・ ・ Slightly good stability Some crystallization is observed × ・ ・ ・ Stable stability Not transparent gel

b) Detergency test A 3 cm x 6 cm white cotton cloth was stained with oil, the dirt was washed with a fixed amount of transparent gel soap, and the detergency was examined to determine the detergency, and the following evaluation was performed.
○ ・ ・ ・ Detergent power good × ・ ・ ・ Detergent power

c) Foaming test Put 100 ml of water and a fixed amount of transparent gel soap in a 500 ml PET bottle, close the lid, shake well for 30 seconds and leave it for about 1 hour. I evaluated like this.
◎ ... Excellent foaming Height of foaming from liquid surface 10cm or more ○ ... Good foaming Range of foaming height from liquid surface 5-10cm Δ ・ ・ ・ Slightly good foaming Height of foaming from liquid surface 2.5 to 5 cm range x ... Poor foaming range Foaming height from the liquid surface 0 to 2.5 cm range

d) Usability test A small amount of transparent gel soap was taken, and when it was washed away with tap water, it was examined whether there was a refreshing feeling or skin irritation, a slimy feeling, or a sticky feeling, and the following evaluation was made.
◎ ... Feeling good ○ ... Feeling somewhat good △ ... Feeling somewhat bad × ... Poor usability

e) Hardness test A transparent gel soap was packed in a tube-shaped container, and the hardness was examined by the ease of taking it out when taken out by hand, and the following evaluation was performed.
○: Hardness is good △: Hardness is slightly good ×: Hardness is poor

Examples 1-21
A transparent gel soap having the composition shown in Table 1 was produced by a saponification method, and the gel-like stability / hardness, detergency, foaming, and feeling of use were evaluated, and the results are shown in Table 1.

  As is clear from the results shown in Table 1, it has been demonstrated that the transparent gel soap comprising the blend composition of the present invention exhibits excellent performance in stability / hardness, detergency, foaming and usability.

  The present invention uses natural vegetable oils in the natural world, has excellent foaming and detergency, has no skin irritation, has a refreshing feeling after hand washing, and can be maintained at a low temperature for a long time without adding a gelling agent. A good transparent gel soap can be provided.

Claims (4)

Next components (A) to (D)
(A) Olive oil 30-100% by weight
(B) Palm oil 0-25% by weight
(C) Castor oil 0-25% by weight
(D) Coconut oil 0-30% by weight
A transparent gel-like soap characterized by containing.   2. The transparent gel soap according to claim 1, comprising 20 to 80% by volume of (E) ethanol for transparency and gelation.   30 to 100% by weight of olive oil, 0 to 25% by weight of palm oil, 0 to 25% by weight of castor oil, 0 to 30% by weight of coconut oil, (F) potassium hydroxide, and (G) 20 to 50% by weight of water are mixed. A method for producing a transparent gel soap, comprising a step of stirring while maintaining a temperature of 70 to 90 ° C and a step of adding ethanol and stirring while maintaining a temperature of 60 to 70 ° C after completion of the saponification reaction.   4. The method for producing a transparent gel soap according to claim 3, further comprising a step of naturally cooling to room temperature after adding ethanol and stirring to form a transparent gel.