JP7182761B2 - Pearl agent and cosmetics having pearl feeling - Google Patents

Description

TECHNICAL FIELD The present invention relates to a pearlizing agent capable of imparting pearly luster to cosmetics and the like, and to cosmetics having a pearly feel.

2. Description of the Related Art Conventionally, cosmetics such as shampoos, hair rinses, lotions and the like have been imparted with a pearl luster having a beautiful appearance for the purpose of differentiating their appearance and increasing their commercial value. In order to impart pearl luster to cosmetics, a method of dispersing inorganic substances such as mica and fish scale foil, and oils and fats such as waxes and higher fatty acids is used (see, for example, Patent Documents 1 to 3).

JP-A-61-152609 Japanese Patent Application Laid-Open No. 01-228502 JP-A-07-077817

However, especially when using oils and fats to impart pearl luster, the appearance of pearl luster may be insufficient, or sedimentation or floating may cause unevenness in pearl luster, and further, pearl luster may occur at high temperatures. It was difficult to maintain a beautiful pearl luster, such as low temperature resistance such as disappearing.
An object of the present invention is to provide a pearlescent agent capable of imparting an even pearly luster with excellent temperature resistance and stability over time with almost no sedimentation or floating, and a cosmetic having a pearly feel.

As a result of intensive research, the present inventors found that the use of carnauba wax and a surfactant as a specific dispersant can improve the temperature resistance and stability of pearl luster over time. Arrived.
That is, the pearlescent agent of the present invention is characterized by containing carnauba wax and at least one ether-based surfactant in which a polyalkyleneoxy group and an alkyl group are ether-bonded.

Since the pearlescent agent of the present invention has high temperature resistance and stability over time and can maintain an even pearly luster, it can maintain a beautiful appearance and, in particular, can increase the added value of cosmetics.

Embodiments of the present invention will be described below.

The pearlescent agent of the present invention is characterized by containing water, carnauba wax, and an ether-based surfactant in which at least one polyalkyleneoxy group and an alkyl group having 10 to 24 carbon atoms are ether-bonded.
As described above, by selecting carnauba wax as the oils and fats and using a specific surfactant, it is possible to provide a pearly feel and improve the stability of the pearly luster over time. This makes it possible to increase the added value, especially when used in cosmetics.

Surfactants used in the present invention include ether-based surfactants in which a polyalkyleneoxy group and an alkyl group having 10 to 24 carbon atoms are ether-bonded.
Examples of the polyalkyleneoxy group include a polyethyleneoxy group, a polypropyleneoxy group, a polybutyleneoxy group, etc. Among these, a polyethyleneoxy group is preferable.
The alkyl group having 10 to 24 carbon atoms may be linear or branched, and examples thereof include lauryl group, myristyl group, cetyl group, oleyl group, isocetyl group, octyldodecyl group, decyltetradecyl group and the like. Among these, a lauryl group, a myristyl group, and an isocetyl group are preferred.
Further, the HLB (weighted average HLB when mixed) of the surfactant is preferably 14 or more. Among them, preferred surfactants include (C12-14)-paleth-12, isoceteth-20, isoceteth-25, a combination of isoceteth-15 and isoceteth-20 or isoceteth-25, and the like.
HLB is an index showing the Hydrophile-Lipophile Balance, and in the present invention, the value calculated using the following formula by Oda and Teramura et al.
HLB = {(Σ inorganic value) / (Σ organic value)} × 10

Further, in the pearlescent agent and the cosmetic having a pearly feel of the present invention, the weight ratio of surfactant to carnauba wax is preferably 0.01-40.

Furthermore, it is believed that the pearlescent agent and the cosmetic having a pearly feel of the present invention provide a pearly appearance by dispersing the carnauba wax and the above-mentioned surfactant in a solvent.

As the solvent, water, 1,3-butylene glycol, glycerin, lower monohydric alcohol and the like are usually used, and water is particularly preferable. The content of these solvents is preferably 5 to 95% of the total amount of the pearlescent agent and cosmetic having a pearly feel.
Incidentally, the pearlescent agent can be made into a composition having a pearly feel by diluting it with the above solvent and other components. That is, by diluting the pearlescent agent with the solvent and other components, a cosmetic having a pearly feel can be obtained.

In addition to the components described above, the pearlescent agent and pearlescent cosmetic of the present invention may optionally contain other components used in known cosmetics as long as the effects of the present invention are not impaired. Specifically, an extract, a humectant, a solvent, a sweetening agent, a coloring agent, a fragrance, an active ingredient, and the like are blended.

Examples of the extract include squeezed juice obtained by pressing and extracting pulverized material of the target plant, steam distillate, crude extract with various extraction solvents, distribution of crude extract, various chromatography such as column chromatography, etc. can be used as the extract in the present invention.
The part of the plant used for extraction is not particularly limited, and any part such as seeds, seed coats, pulp, flowers, leaves, stems, roots, rhizomes or whole plants can be appropriately selected and used. These can be used singly or in combination of two or more.

Examples of the humectant include sugar alcohols such as xylitol and erythritol, polyhydric alcohols such as propylene glycol, glycerin, ethylene glycol and polyethylene glycol, and derivatives thereof.

As the sweetening agent, xylitol, maltitol, saccharin, saccharin sodium, stevioside, aspartame and the like can be blended in normal amounts.

Examples of the coloring agents include Blue No. 1, Green No. 3, Yellow No. 4, Red No. 105, highly safe water-soluble pigments such as caramel, Blue No. 403, Green No. 202, Yellow No. 201, Yellow No. 204, Oil-soluble pigments such as Yellow No. 404, Yellow No. 405, Red No. 215, Red No. 223, Red No. 225, Red No. 505, Orange No. 201, Orange No. 403 and Purple No. 201 can be added.

Examples of active ingredients include fungicides such as isopropylmethylphenol, chlorohexidine hydrochloride, and chlorohexidine gluconate; enzymes such as dextranase and mutanase; fluorides such as sodium fluoride and sodium monofluorophosphate; Vitamins and coenzymes such as allantoin, allantoin, azulene, lysozyme chloride, vitamin A, vitamin B1, vitamin B2, vitamin B6, vitamin P, CoQ10, CoQ9, CoQ8, dihydrocholesterol, glycyrrhizic acids, glycyrrhetinic acids, glycyrrhetinic acids, hydro Cholesterol, chlorophyll, copper chlorophyllin sodium, plant extracts such as thyme, scutellaria root, clove, hamamelis, copper gluconate, calopeptide, sodium polyphosphate, water-soluble inorganic phosphate compound, polyvinylpyrrolidone, anticalculus agent, antiplaque agent, Potassium nitrate, aluminum lactate and the like can be added.

Examples of the antiseptic include paraoxybenzoic acid esters such as methylparaben, ethylparaben, propylparaben and butylparaben, phenoxyethanol, ethanol and dehydroacetic acid.

The pearlescent agent and pearlescent cosmetic of the present invention can be produced by dissolving and mixing carnauba wax and a surfactant, optionally adding a solvent and heating, followed by mixing with a solvent such as water. can. In addition, other components such as those described above may be appropriately added as necessary.
Furthermore, the pearlescent agent of the present invention can be mixed with other cosmetics to produce cosmetics having a pearly feel.

EXAMPLES The present invention will be specifically described below by way of examples, but these are not intended to limit the scope of the present invention (however, examples 1 to 7 and 9 to 11 are reference examples) .

Synthesis example 1
28 mol of ethylene oxide was added to 1 mol of decyltetradecyl alcohol to synthesize POE (28) decyltetradecyl ether.

Synthesis example 2
34 mol of ethylene oxide was added to 1 mol of octyldodecyl alcohol to synthesize POE (34) octyldodecyl ether.

<Preparation and evaluation of pearl agent and cosmetic having pearl feeling>
After heating and mixing (1) in the ratio shown in Table 1 below to homogenize the mixture, the mixture was poured into heated (2) water and cooled while stirring to prepare a pearlescent agent and a cosmetic having a pearly feel. .
Furthermore, regarding the pearlescent agent, presence or absence of a pearly feeling (pearl luster) immediately after production, and storage at 45° C. for 30 days were confirmed for temperature resistance and stability over time. Table 1 shows the results.

As described above, in the examples of the present invention, it was possible to obtain a pearly feel, and the temperature resistance and aging stability of the pearly feeling were high. In the case of using oils and fats other than carnauba wax, it was not possible to obtain a pearly feeling.
Furthermore, when the composition of Example 8 and water were mixed at a weight ratio of 1:99, the diluted product also had a pearly feel. Furthermore, even after storing this diluted product at 45° C. for 30 days, the pearl feeling was maintained, and the temperature resistance and stability over time were high.

Claims (2)

5 to 95% by weight of water;
0.3 to 30% by weight of carnauba wax;
At least one nonionic ether-based surfactant in which a polyalkyleneoxy group and an alkyl group selected from a lauryl group, a myristyl group, an isocetyl group, an octyldodecyl group and a decyltetradecyl group are ether-bonded, and the HLB is weighted. 0.1 to 60% by weight of a surfactant with an average of 14 or more;
and wherein the weight ratio of the surfactant to the carnauba wax is 0.01-40. 2. The pearlescent agent and cosmetic having a pearly feel according to claim 1, wherein the polyalkyleneoxy group in the ether-based surfactant is a polyethyleneoxy group.