JPH04297412A - Bathing agent composition - Google Patents

Abstract

PURPOSE:To obtain a bathing agent composition, capable of preventing foaming in use, especially in reboiling and additional cooking without impairing preservation stability and solubility in a bathing agent for emulsifying and clouding an oily ingredient with a surfactant in bath water. CONSTITUTION:A bathing agent containing an oily ingredient which is a liquid at ordinary temperature, a nonionic surfactant having 2-14 HLB and a higher fatty acid or its salt which is a solid at ordinary temperature. A branched higher alcohol which is a liquid at ordinary temperature is preferably added to the above-mentioned composition. Thereby, the higher fatty acid or its salt is prevented from depositing at low temperatures.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath additive composition which, when dissolved in bath water, easily mixes oil into the bath water and emulsifies to form an emulsion.

0002

[Prior art and its problems] Bath additives that give the bath water an emulsified appearance when used have been developed for the purpose of creating a hot spring feeling or imparting skin care effects. There are two types of emulsification methods: one in which a clouding agent is added and dispersed in bath water, and the other in which oil is emulsified in bath water to make it cloudy. In the former emulsification method, powdered or tablet-shaped bath additives based on inorganic salts are mainly used, but because the specific gravity of clouding agents such as titanium oxide is generally high, when dissolved in hot water, it tends to deteriorate over time. The whitening agent not only settles and reduces the whiteness of the bath water, but also has the disadvantage that when the bath water is dropped, the clouding agent accumulates at the bottom of the bathtub, causing problems in cleaning the bath water. On the other hand, in the latter emulsification method, a liquid or gel-like substance consisting of an oil that is liquid at room temperature and a surfactant to emulsify it, or a substance encapsulated in a capsule, is used. By appropriately selecting the type and amount of the emulsion, it is possible to easily uniformly emulsify the emulsion when added to the bath water, and to create a bath water with a cloudy appearance. What's more, the blended oil remains on the skin, giving it an emollient effect on the entire body. The key point in the development of this type of bath additive is the relationship between oil and surfactants, and several studies have been conducted on them (JP-A-52-70028, JP-A-61
-227519, JP-A-1-238518, JP-A-2-
91016). However, in the case of this bath additive, there is a problem in that the surfactant causes foaming during use, especially when the bath water is reboiled or reheated.

0003

[Problems to be Solved by the Invention] The present invention provides a bath additive that emulsifies oil in bath water using a surfactant to prevent foaming during use, especially when reboiling or re-cooking, and has storage stability. The object is to provide a bath additive composition that does not impair solubility.

0004

[Means for Solving the Problems] The present inventors have conducted extensive research to solve the above problems, and as a result, have completed the present invention.

That is, according to the present invention, there is provided a bath additive composition containing an oil that is liquid at room temperature, a nonionic surfactant with an HLB of 2 to 14, and a higher fatty acid or a salt thereof that is solid at room temperature.

The bath additive composition of the present invention uses an oil that is liquid at room temperature. This oil includes avocado oil,
Oils and fats such as camellia oil, safflower oil, and jojoba oil; Hydrocarbons such as liquid paraffin and squalane; Higher fatty acids such as oleic acid and isostearic acid; Higher alcohols such as lauryl alcohol and octyldodecanol; Methylpolysiloxane and octamethylcyclo Examples include silicone such as polysiloxane; esters such as isopropyl palmitate and octadodecyl myristate. The blending amount of this oil is 30 to 90% by weight in order to give a cloudy bath water.
, preferably 50 to 90% by weight.

[0007] As the nonionic surfactant used in the present invention, one having an HLB of 2 to 14 is used. Such surfactants include glycerin fatty acid ester,
Fatty acid ester-based, alkyl ether-based, and alkylphenyl ether-based ones are included. The amount of this nonionic surfactant is 5 to 50% by weight, preferably 5 to 3% by weight.
0% by weight, and an appropriate amount is used depending on the type and amount of oil.

In the present invention, in order to solve the problem of foaming caused by nonionic surfactants during use, higher fatty acids or salts thereof that are solid at room temperature are blended. As higher fatty acids, those having 12 to 22 carbon atoms, such as lauric acid, myristic acid, palmitic acid, etc., are usually used. On the other hand, higher fatty acid salts include sodium salt,
Potassium salts, calcium salts, magnesium salts, etc. are used, but any salt can be used as long as it is soluble in bath water. From the viewpoint of solubility in bath water and ease of commercialization, it is preferable to use sodium salts and potassium salts. The blending amount of higher fatty acids and their salts is 0.1 to 5% by weight,
Preferably it is 0.5 to 3% by weight. Further, when using a higher fatty acid salt, the higher fatty acid and an alkali may be used together and reacted at the time of blending. As alkalis, sodium hydroxide, potassium hydroxide, calcium hydroxide,
Inorganic alkalis such as magnesium hydroxide and their aqueous solutions,
Examples include amines such as triethanolamine and triisopropanolamine. The amount of alkali added is 0.01
-7% by weight, preferably 0.1-5% by weight.

[0009] In connection with the use of the higher fatty acid or its salt, the bath additive composition of the present invention preferably contains a branched higher alcohol that is liquid at room temperature. As this branched higher alcohol, one having 12 to 24 carbon atoms is preferably used, and for example, hexyldecanol, octyldodecanol, etc. are preferably used. The blending amount of this branched higher alcohol is 0.1 to 0.2% by weight.
, preferably 1 to 10% by weight. By blending this branched higher alcohol, precipitation of higher fatty acids and their salts in the composition at low temperatures is prevented, and the storage stability of the product is improved. The composition of the present invention may further contain, if necessary, auxiliary additives commonly used in bath additive compositions of this type, such as fragrances, pigments, animal and plant extracts, essential oils, vitamins, amino acids, enzymes, humectants, etc. can be blended.

0010

Effects of the Invention The bath additive composition of the present invention is in the form of a transparent liquid and is used by being added to bath water. has a uniform cloudy appearance. In the composition of the present invention, since a higher fatty acid or a salt thereof is used in conjunction with the use of a specific nonionic surfactant, foaming is prevented during reboiling of bath water or during additional cooking. Furthermore, products to which branched higher alcohols that are liquid at room temperature are added have good storage stability because precipitation of higher fatty acids and their salts at low temperatures is prevented.

[0011]

EXAMPLES Next, the present invention will be explained in more detail with reference to examples.

Examples 1 to 8, Comparative Examples 1 to 4 Bath additives having the component compositions shown in Table 1 were prepared, and their properties and performance were evaluated as follows. The results are shown in Table 1 in relation to the composition of the bath additives. (1) Anti-foaming effect Bath additive concentration 20
Prepare a 0 ppm test solution (dissolved in hot water at about 40°) in a 1 liter beaker, throw it into the beaker and heat it for 5 minutes using a heater, and evaluate the amount of bubbles floating on the surface of the solution. ◎: None ○: A trace amount disappears within 1 minute △: Somewhat present ×: Quite a bit (2
) Storage stability (i) Crystal precipitation prevention effect The product was stored at low temperature (-5°) for one week and the amount of crystals was evaluated. ◎: Not at all ○: Trace amount △: Slightly large amount ×
: High (ii) Separation stability The product is stored at high temperature (50°) for one week, and the presence or absence of phase separation of the product solution is evaluated. ◎: Not at all ○: Almost none △: Slightly separated
×: Completely separated (3) Emulsifying property 1 g of the product was added to 1 liter of hot water at 40°C, and the product was lightly stirred to evaluate the ease of emulsification. ◎: Emulsifies fairly easily ○: Emulsifies easily △:
Slightly difficult to emulsify ×: Difficult to emulsify

00
13]

[Table 1]

Claims (2)

[Claims] [Claim 1] Oil that is liquid at room temperature and HLB2-14
A bath additive composition containing a nonionic surfactant and a higher fatty acid or a salt thereof that is solid at room temperature. 2. The bath additive composition according to claim 1, which contains a branched higher alcohol that is liquid at room temperature.