JPS62263111A - Viscous composition - Google Patents

Abstract

PURPOSE:A viscous composition having viscosity with improved stability and satisfactory utility, obtained by blending a base consisting of a lower alcohol and water, containing >=a specific amount of the lower alcohol, with carboxyvinyl polymer and xanthan gum. CONSTITUTION:A base for skin external preparation useful as cosmetic, drugs, etc., consisting of (A) >=20wt%, preferably 20-80wt% lower alcohol, especially ethyl alcohol and (B) <=80wt%, preferably 10-80wt% water is blended with (C) 0.01-3wt% carboxyvinyl polymer and (D) 0.01-3wt% xanthan gum in a weight ratio of the component C/D of 20/1-1/20 to give a viscous composition useful as the base having improved viscosity stability and utility.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention is a viscous composition consisting of lower alcohol, water, carboxyvinyl polymer, and xanthan gum, which has excellent viscosity stability and usability, and is suitable for use in cosmetics, pharmaceuticals, etc. This invention relates to a base for external skin preparations.

[Conventional technology]

The bases for external skin preparations used in cosmetics, pharmaceuticals, etc. have traditionally been liquid bases, emulsion bases, cream bases,
Ointment bases are known.

Among these, liquid bases are widely used because they have a refreshing feeling and are less irritating to the skin.
Products with water-lower alcohol base ingredients include fragrance,
It is used as a preferred liquid base because it can be blended with various ingredients such as drugs.

[Problem that the invention seeks to solve]

However, these liquid bases, especially those containing 20% or more lower alcohol, have disadvantages in use, such as dripping during use, difficulty in removing AH, and difficulty in applying to the skin. Therefore, it was considered desirable to impart appropriate viscosity.

Compounds conventionally used to impart viscosity to these liquid bases include polyacrylic acid, polyvinylpyrrolidone, carboxymethylcellulose, methylcellulose, hydroxyethylcellulose, carrageenan, locust pea gum, gum arabic, etc. thickener,
Clay minerals such as bentonite, vee gum, and laponite are known, but even when these compounds are blended alone or in combination, they are not usable in terms of viscosity stability and usability. In particular, systems containing a large amount of lower alcohol in a water-lower alcohol base tend to have a marked tendency to become a problem in the production of viscous compositions.

In view of the above circumstances, the present inventors conducted intensive research to obtain a viscous composition consisting of a base consisting of a lower alcohol and water and having both good viscosity stability and satisfactory usability. The inventors have discovered that the above object can be achieved by blending vinyl polymer and xanthan gum in a certain ratio, and have completed the present invention.

[Means for solving problems]

That is, the present invention provides a viscous composition characterized by comprising 20% by weight or more of a lower alcohol, water, a carboxyvinyl polymer, and xanthan gum.

Hereinafter, the configuration of the present invention will be explained in detail.

The carboxyvinyl polymer used in the present invention is Carboball 934 (manufactured by Gutdrich, USA: registered trademark),
Carboball 940 (〃), Power-Boball 941 (〃)
, Hibiswako 104 (Wako Pure Chemical Industries, Ltd. (41:I: registered trademark), Hibiswako-105 (~), etc. are preferably used.The amount of these thickeners varies depending on the characteristics of the product to be obtained. , a range of 0.01 to 3% is desirable.If the amount is too small, appropriate viscosity cannot be obtained;
If the amount is too high, it will be difficult to dissolve the thickener, and the smoothness of use will be lost.

Carboxyvinyl polymers are generally used after being neutralized with basic substances. Examples of basic substances include sodium hydroxide, potassium hydroxide, triethanolamine, aminomethylpropanediol, aminomethylpropanediol, and aminomethylpropanediol. Methylpropanetriol, monoisopropanolamine, diisopropanolamine, triisopropanolamine can be used, but aminomethylpropanolamine and triisopropanolamine have good neutralization with carboxyvinyl polymers. is preferred.

As the xanthun gum in the present invention, Geltrol (registered trademark of Kelco Co., Ltd., USA), Kelzan (.), etc. can be suitably used. The blending amount varies depending on the desired viscosity, but is preferably 0.01 to 3%. As in the case of carboxyvinyl polymer, if the amount is too small, appropriate viscosity cannot be obtained, and if it is too large, it becomes difficult to dissolve and the smoothness in use is lost.

The ratio of carboxyvinyl polymer and xanthan gum in the present invention can be selected arbitrarily, but in order to fully exhibit the effects of the present invention, the ratio of carboxyvinyl polymer/xanthan gum should be between 20/1 and 1/20. A range is preferred. By varying the blending amounts of carboxyvinyl polymer and xanthan gum, the viscous composition of the present invention can be obtained with a viscosity ranging from several tens of centipoises to several million centipoises.

Examples of the lower alcohol used in the present invention include methyl alcohol, ethyl alcohol, propyl alcohol, and butyl alcohol, but ethyl alcohol is most preferred from the viewpoint of safety and odor. In addition, the blending amount varies depending on the type and amount of ingredients such as fragrances and drugs, but it can be blended in a range of 20% by weight or more (hereinafter simply referred to as %). solubility of,
Solubility of carboxyvinyl polymer, xanthogum,
Particularly preferred is 20 to 80%, which is good in terms of usability.

In addition, the water used in the present invention includes ion exchange water,
Distilled water, sterilized water, tap water, etc. can be used. Regarding the blending amount, it can be blended in a range of 80% or less, but the solubility of ingredients such as fragrances and drugs, carboxyvinyl polymer,
Xanthan gum has good solubility and usability, 1
0 to 80% is preferred.

In the present invention, in addition to the above-mentioned essential ingredients, if desired, agents such as fragrances, anti-inflammatory agents, bactericidal agents, astringents, and hemostatic agents, humectants such as propylene glycol, dipropylene glycol, glycerin, and sorbitol, and hydrocarbon oils are added. Various ingredients can be blended, including oils such as ester oils and oils, hardened Himanura derivatives, nonionic surfactants such as esters and ethers, anionic surfactants, plant extracts, and pigments. In addition to the polymer and xanthan gum, other thickeners can also be added.

In particular, by blending perfume in a range of 0.5 to 30% by weight, a novel viscous composition that has never been seen before can be obtained.

The composition of the present invention can be prepared by adding the carboxyvinyl polymer and xanthun gum directly to water and dissolving it;
It can be produced by wet-dispersing it in some lower alcohol, adding it to water, dissolving it, and then adding the lower alcohol.

Furthermore, when other components are added, it is desirable to dissolve them in either water or lower alcohol before adding them.

〔Example〕

Next, Examples and Comparative Examples will be given to specifically clarify the present invention. The present invention is not limited thereby. All blending amounts are weight %.

Compositions having the formulations shown in Table 1 were prepared, and their thickening properties, viscosity stability, and usability were evaluated. The results are also listed in Table 1. Note that the evaluation was performed according to the following criteria.

(Thickening) O: An increase in viscosity is observed due to the addition of a thickener.

×: No increase in viscosity due to the addition of a thickener is observed.

(Thickening stability) ○: Stable with no change in viscosity for one month under each temperature condition of 0°C, 125°C, and 40°C.

×: A clear change in viscosity is observed under the above conditions.

(Usability) ○: Spreads well and has a light and good feeling on use.

×: Unsatisfactory feel in use in terms of spread and lightness.

Examples are shown below.

[Example 1] Jelly-like eau de cologne fragrance 5 carboxymethyl polymer aminomethyl propanol neutralized product 0.5 Xankungum 0.3 Echmeamecol 70, ion-exchanged water
The remainder (to 100%) of the above composition had a viscosity of 30,000 centiboise and was good in both viscosity stability and usability.

[Example 2] Gel-form external anti-inflammatory agent Methyl salicylate 5dffi-camphor 3dl-menthol
3 propylene glycol
10 carboxyvinyl polymer aminomethyl propanol neutralized product 1.5 xanthan gum 1.0 isopropyl alcohol 5° distilled water
The remaining first composition had a viscosity of 200,000 centipoise, and had good viscosity stability and usability.

[Example 3] Viscous liquid softening lotion glycerin 5-propylene glycol 3-dipropylene glycol
2 Polyoxyethylene (20 mol) Sorbitan monolaurate 1 Ethyl alcohol 2°Fragrance
0.5 Carboxyvinyl polymer triisopropanolamine neutralized product 0.2 Xanthan gum 0.2 Dye
Trace preservative
〃Purified water remainder
The above composition had a viscosity of 1000 centipoise and was good in both viscosity stability and usability.

[Example 4] Gel-like hair setting agent Polyvinylpyrrolidone/vinyl acetate Pro 7 Kvorimer 5 Fragrance
1 Polyoxyethylene (60 mol) Hydrogenated castor oil 2 Ethyl alcohol 55 Carboxyvinyl polymer aminomethylpropanol neutralized product 1 Xanthan gum 0.7 Fragrance
Trace ion exchange water
The rest of the composition had a viscosity of 5 cm, and was good in both viscosity stability and usability.

[Examples 5 to 9] It is described in Table 1.

〔Effect of the invention〕

The viscous composition according to the present invention is characterized by comprising a lower alcohol, water, carboxyvinyl polymer, and xanthan gum, and has good viscosity stability and usability.

Claims (2)

[Claims] (1) A viscous composition comprising 20% by weight or more of a lower alcohol, water, a carboxyvinyl polymer, and xanthan gum. (2) The viscous composition according to claim 1, wherein the lower alcohol is ethyl alcohol.