JP2001048720A - Humectant and bacteriostatic agent for cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a humectant and bacteriostatic agent that has a lower skin irritation than that of p-hydroxybenzoic ester. SOLUTION: This humectant and bacteriostatic agent for face washing or for non-face washing purposes comprises 1,2-octanediol. In a preferred embodiment, this moisture-retaining and bacteriostatic agent is used in cosmetics in an amount of about 0.01-10 wt.%. This agent can increase the humectant effect of the cosmetics and can give the cosmetics bacteriostatic effect.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moisturizing and bacteriostatic agent used by adding to cosmetics.

[0002]

2. Description of the Related Art In recent years, interest in global environmental protection and human safety has rapidly increased among consumers, and products that are "friendly to humans and the earth" have attracted attention. As surfactants, products with low irritation to the human body and high safety, and products with low environmental impact and high biodegradability are demanded. Activators are being developed. Further, not only the components constituting the main components of toiletry products such as surfactants, but also other additives that are less irritating to the human body and highly safe are desired.

[0003]

An additive widely used in cosmetics is parahydroxybenzoic acid ester (paraben). It is incorporated in milky lotions, lotions, and the like for the purpose of a bacteriostatic effect that suppresses the propagation of various bacteria. However, parahydroxybenzoic acid ester has a problem that it is highly irritating to the skin.

Accordingly, the present inventors have conducted intensive studies and as a result,
The present inventors have found that 1,2-octanediol has almost the same bacteriostatic properties as parahydroxybenzoic acid ester, has excellent moisturizing properties and low skin irritation, and has completed the present invention.

[0005]

That is, the present invention is a moisturizing bacteriostatic agent for cosmetics comprising 1,2-octanediol.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The moisturizing bacteriostatic agent for cosmetics of the present invention comprises:
It is preferable to use about 0.01 to 10% by weight of the cosmetic. The moisturizing bacteriostatic agent for cosmetics of the present invention can improve the moisturizing effect of cosmetics. In addition, a bacteriostatic effect of preventing the propagation of various bacteria and the like can be imparted to the cosmetic. The moisturizing bacteriostatic agent for cosmetics of the present invention is less irritating to the skin than para-hydroxybenzoic acid ester blended for the same purpose as before, and is a cosmetic additive milder to bare skin. Therefore, the moisturizing bacteriostatic agent for cosmetics of the present invention can be used in combination with parahydroxybenzoic acid ester for the purpose of reducing the amount of parahydroxybenzoic acid ester in addition to replacing parahydroxybenzoic acid ester. it can.

[0007] Cosmetics to which the moisturizing bacteriostatic agent for cosmetics of the present invention can be blended are not particularly limited. Cosmetics; permanent waving agent, hair cream, hair wax, hair foam, hair bleach, hair lotion, hair liquid, hair tonic, hair color, hair restorer, lotion, emulsion, body lotion, shaving cream, after shaving lotion, pre-shaving Lotion, face lotion, hand cream, moisture cream,
Non-washable cosmetics such as cleansing cream, cold cream, sunscreen, foundation, mascara, pack, nail polish, nail polish remover, eyeliner, lip balm, lipstick and the like.

[0008] The moisturizing bacteriostatic agent for cosmetics of the present invention can be used in combination with other components. As other components, for example,
Examples include surfactants, solvents, oils, and the like.

As the surfactant, for example, alcohol ethoxylate, alkylphenol ethoxylate,
Alkyl polyglycosides, fatty acid alkanolamides,
Nonionic surfactants such as fatty acid alkoxylates and fatty acid monoglycerides; alkylbenzene sulfonates;
Anionic surfactants such as alkyl sulfates, alkyl ether sulfates, α-olefin sulfonates, acylated isethionates, acylated amino acids, acylated polypeptides, fatty acid soaps and alkyl ether carboxylates; stearyltrimethylammonium chloride, cetyltrimethylammonium chloride; Cationic surfactants such as alkylpyridinium chloride and polydimethyldiallylammonium chloride; alkylcarbobetaine;
Amphoteric surfactants such as amidopropylcarbobetaine and imidazolinium betaine; and semipolar surfactants such as alkylamine oxide.

Examples of the solvent include ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, tetramethylene glycol, ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, ethylene glycol monobutyl ether, diethylene glycol monobutyl ether, polyethylene glycol, and polyalkylene glycol alkyl. Examples include ether, glycerin, ethanol, and isopropyl alcohol.

Examples of oils include fatty acid glycerides such as stearic acid monoglyceride, oleic acid monoglyceride, palmitic acid monoglyceride, myristic acid monoglyceride, lauric acid monoglyceride, capric acid monoglyceride, caprylic acid monoglyceride and the like; polyglycerol stearate, polyglycerol olein Acid esters, polyglycerin palmitate, polyglycerin myristate, polyglycerin laurate, polyglycerin caprate, polyglycerin caprylate, and other polyglycerol esters; hydrocarbons such as squalane, petrolatum, liquid paraffin; Silicones such as dimethylpolysiloxane, octamethylsiloxane, cyclic silicone and silicone oil; B pills myristate, myristyl myristate, octyldodecyl oleate, esters such as isostearyl isostearate; lanolin,
Lanolins such as hydrogenated lanolin, white lanolin, liquid lanolin; carnauba wax, candelilla wax,
Waxes such as microcrystalline wax; waxes such as beeswax and gay wax; higher fatty acids such as stearic acid, isostearic acid and oleic acid; higher alcohols such as cetanol and stearyl alcohol.

[0012]

The present invention will be described more specifically with reference to the following examples. In the following examples,% is based on weight unless otherwise specified.

The following is a typical formulation example using 1,2-octanediol. The numerical values in the table are% by weight based on the total amount of the composition. (Formulation Example 1) Emulsion

[0014]

[Table 1]

(Formulation Example 2) Lotion

[0016]

[Table 2]

(Formulation Example 3) Shampoo

[0018]

[Table 3]

(Formulation Example 4) Hair rinse

[0020]

[Table 4]

(Formulation Example 5) Body shampoo

[0022]

[Table 5]

(Formulation Example 6) Hair Treatment

[0024]

[Table 6]

Example 1 2% of 1,2-octanediol was added to the following five kinds of bacterial species a to e,
The number of bacteria was measured after 1 day and 7 days and tested for bacteriostatic properties of 1,2-octanediol. Bacterial a: E. coli (ATCC 8739) b: Pseudomonas aeruginosa
(ATCC 9027) c: Staphylococcus aureus (A
TCC 6538) d: Candida albicans (ATCC 1
0231) e: Aspergillus niger (ATCC
16404)

[0026]

[Table 7]

Example 2 A 1% solution of 1,2-octanediol or ethyl parahydroxybenzoate (comparative) in petrolatum was applied to the skin of rabbits, and the degree of skin irritation was observed and evaluated according to the following criteria. .

：: no change Δ: slightly reddish
X: It became red.

[0029]

[Table 8]

Example 3 High Frequency Conductivity Meter (SKI)
CON-200, manufactured by IBS Shokai) at 25 ° C.
Under a condition of 65% H, a 0.5% aqueous solution of sample concentration of 1.3 μL / cm ^{2 was} applied to the left forearm flexion of the panel, and then the conductivity was measured. This was repeated 10 times, and the average value was used as the evaluation value. In addition, about the emulsion A of the formulation example 1, 1,2-
0.5% based on octanediol.

[0031]

[Table 9]

[0032]

The effect of the present invention is to provide a moisturizing bacteriostatic agent for cosmetics which exhibits bacteriostatic properties almost equal to that of parahydroxybenzoic acid ester, has excellent moisturizing properties and low skin irritation. is there.

Continued on the front page F-term (reference) 4C083 AA082 AC012 AC022 AC072 AC102 AC111 AC112 AC122 AC242 AC352 AC392 AC402 AC422 AC432 AC482 AC642 AC662 AC692 AC712 AC782 AD092 AD112 AD152 AD242 AD282 AD352 AD422 AD432 AD452 CC05 CC23 CC33 CC38 CC39 DD23 DD27 DD EE31 EE31 EE31 EE 4C206 AA01 AA02 CA07 MA01 MA04 MA83 NA14 ZA90 ZB35

Claims (2)

[Claims] 1. A moisturizing bacteriostatic agent for detersive cosmetics comprising 1,2-octanediol. 2. A non-detergent cosmetic moisturizing bacteriostatic agent comprising 1,2-octanediol.