JPH0238461A - Emulsion composition - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to squalene and squalane emulsion compositions used in the fields of cosmetics, textile treatment agents and bath additives.

[Prior art and its problems] A technique of emulsifying squalane with a surfactant and using it as an emulsion is known. However, for example, emulsions made by emulsifying polyoxyethylene sorbitan monooleate and polyoxyethylene sorbitan triolate using surfactants are not stable over time and tend to separate oil components, although they are emulsified and dispersed in water.

In particular, such changes over time tend to be noticeable when the solid content concentration is low.

Therefore, an object of the present invention is to achieve even better emulsion stability and emulsion dispersibility by adding a 02 to C8 saturated organic mono- or dicarboxylic acid to a conventional squalene or squalane emulsion composition.

[Means for Solving the Problems] That is, the present invention provides the following: (a) 100 parts by weight of squalene and/or Stuff 9 (b) polyoxyethylene sorbitan monooleate, polyoxyethylene sorbitan diolate, polyoxyethylene sorbitan triolate , and 15 to 100 parts by weight of at least one surfactant selected from the group consisting of polyoxyethylene lauryl ether phosphorus salt (C) 0.5 to 5 parts by weight of a saturated organic mono- or dicarboxylic acid, with the remainder being water. The present invention relates to an emulsion composition.

Squalene and squalane, which will explain the present invention in more detail below, can be used alone or in combination. These may be liver oils of fish such as sharks or those collected from plants such as olives. It may also be a synthetic product.

The surfactants to be emulsified include at least one selected from the group consisting of polyoxyethylene sorbitan monooleate, polyoxyethylene sorbitan diolate, polyoxyethylene sorbitan triolate, and polyoxyethylene lauryl ether phosphate sodium salt. It is a type of surfactant. These surfactants can be used alone or in combination. These amounts are 15 to 100 per 100 parts by weight of squalene or squalane,
Preferably 25 to 50 parts by weight are used. If a surfactant is used outside this range, a stable emulsified composition cannot be obtained even if a carboxylic acid is used, which is not preferable. Particularly preferably, polyoxyethylene sorbitan monooleate (the total amount thereof is designated as A) and polyoxyethylene sorbitan triolate (the total amount thereof is designated as B).
It is appropriate to use them together and the weight ratio A/B of both is 1 or less.

In the present invention, 0.5 to 5, preferably 0.7 to 1.0 parts by weight of a saturated organic mono- or dicarboxylic acid of 0.8 or less is added to 100 parts by weight of squalene and squalane. It is not preferable to use a carboxylic acid having 0.9 carbon atoms or more, or when the number of carbon atoms is outside the above-mentioned range, since the effect of adding the carboxylic acid to improve emulsion stability at low concentrations cannot be obtained.

Saturated organic mono- or dicarboxylic acids of 08 or less include acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, enanthic acid, caprylic acid, oxalic acid, malonic acid, succinic acid, glutamic acid, adipic acid, pimelic acid, and speric acid. Examples include. Particularly preferred is succinic acid from the viewpoint of emulsion stability and safety.

Further, within the scope of the purpose of the present invention, other conventionally known surfactants or additives such as antioxidants and emulsification aids may be mixed in appropriate amounts.

The emulsion composition of the present invention can be produced by a conventionally known method, for example, by gradually adding a surfactant to squalene and squalane while stirring, and then gradually adding an aqueous carboxylic acid solution after the addition is complete. Finally, water is added to form an emulsion.

The emulsion composition of the present invention has excellent emulsion dispersibility and emulsion stability, and the surfactant used is also highly safe, so it is useful as a base for cosmetics, fiber treatment agents, bath additives, etc. .

[Examples] The present invention will be explained below with reference to Examples, but the present invention is not limited to these Examples.

Mixing method: 40 g of polyoxyethylene sorbitan monooleate was gradually added to 200 g of squalene while stirring. Then 10 of polyoxyethylene sorbitan triolate
g was gradually added. Furthermore, 10% succinic acid aqueous solution (60%
'C) was added to 100 parts by weight of squalene.
．． 5.10 g and 20 g of each were added to give 25 to 1.0 parts by weight, respectively, to prepare solutions having various succinic acid concentrations.

Finally, water was added to give a total of 1000 g to prepare an emulsion composition with a squalene concentration of 20%.

Each of the above compositions was then diluted with water to a solid content of 1%, and the emulsified state after being left for 24 hours was visually observed. The results are shown in Table 1.

(Left below) Table 1 Stability of emulsion Succinic acid concentration (parts by weight) No additive Separation 0.25 Separation 0.50 Stable 0.75 Stable 1, OO stable For squalane, a 1% solids solution was prepared in the same way. I tested it and got the same result.

[Effect of the invention]

Claims (3)

[Claims] (1) (a) Squalene and/or squalane 1
00 parts by weight (b) at least one surfactant selected from the group consisting of polyoxyethylene sorbitan monooleate, polyoxyethylene sorbitan dioleate, polyoxyethylene sorbitan triolate, and polyoxyethylene lauryl ether phosphate sodium salt 15-10
0 parts by weight (c) An emulsion composition consisting of 0.5 to 5 parts by weight of a saturated organic mono- or dicarboxylic acid having 8 or less carbon atoms, with the balance being water. (2) The emulsion composition according to claim 1, wherein polyoxyethylene sorbitan monooleate and polyoxyethylene sorbitan triolate are used as the surfactant. (3) The emulsion composition according to claim 1, wherein succinic acid is used as the carboxylic acid.