JPS6328444A - Emulsion composition - Google Patents

Abstract

PURPOSE:To improve the emulsion stability and dispersion stability of the title composition in a wide temp. range and to enhance the safety for the skin with respect to its irritating property by incorporating the fine powder of animal hair having 0.01-30mum mean particle diameter to prepare the emulsion composition. CONSTITUTION:The fine powder of animal hair having 0.01-30mum mean particle diameter, or preferably 0.5-5mum, is incorporated by 0.1-10wt%, or preferably 0.5-5wt%, to prepare the emulsion composition. Wool, mink hair, fur such as mohair, the feathers and wings of such birds as goose, duck, and fowl are used as the animal hair. The natural animal and vegetable oil and fat such as paraffin oil, hydrocarbons such as squalene, paraffin wax, and ceresin, olive oil, and spermaceti are exemplified as the oil to be used for the emulsion composition. The content of the oils in the composition is generally controlled to 20-80wt%. The emulsion composition can be utilized for food, paint, medicines, cosmetics, etc.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention provides emulsifying compositions such as water-in-oil type (hereinafter referred to as W10) or oil-in-water type (hereinafter referred to as W10), and more specifically, emulsifying compositions that are excellent over a wide temperature range. The present invention relates to an emulsified composition having storage stability and skin safety.

[Prior Art] Separation of emulsified compositions generally occurs by creaming (or precipitation), agglomeration, or coalescence of emulsified particles. At high temperatures, the emulsified particle layer tends to aggregate, and as a result,
Syneresis phenomenon, that is, the continuous outer layer tends to separate into an upper layer or a lower layer. If the coalescence of the emulsified particle layer further progresses,
■ Separation of the particle layer will occur. Therefore, it has been difficult to obtain an emulsion composition that is stable over a wide temperature range. In particular, relatively stable emulsified compositions can be obtained with non-polar oils such as paraffin oil, but these also lack stability over a wide temperature range, and furthermore, with polar oils such as olive oil, relatively stable emulsified compositions can be obtained. Even the stability at room temperature was not satisfactory.

Particularly in cosmetics containing various pigments such as makeup cosmetics, it is difficult to ensure not only emulsion stability but also pigment dispersion stability.

Conventionally, emulsified compositions have generally been emulsified using surfactants. Surfactants are a group of substances that have a hydrophilic group and a lipophilic group in one molecule and exhibit surfactant ability, and have high solubility in base materials and strong permeability into the skin. Therefore, it may cause skin irritation for some people.

[Problems to be Solved by the Invention] In view of the above circumstances, the present inventors have conducted intensive research with the aim of obtaining an emulsified composition with excellent storage stability and good safety. The present inventors have discovered that the above object can be achieved by using animal hair as an emulsifier without the need for the combined use of conventionally used surfactants, leading to the completion of the present invention.

[Means for solving the problem] That is, the present invention has an average particle size of 0.01 μm = 30 μm
This is an emulsified composition containing fine animal hair powder.

Unlike the conventional concept of dissolving a surfactant in a base to emulsify the oil and water phases, the present invention emulsifies the oil and water phases by directly dispersing a solid with emulsifying ability in the base. (Based on a new way of thinking.)

This emulsification method is not affected by the polarity of the oil phase, and does not require the complicated procedure of selecting a surfactant based on the HLB (hydrophilic/lipophilic) balance as in the past. Furthermore, since fine animal hair powder is a substance that does not dissolve in either the aqueous phase or the oil phase, the balance of the system is less likely to be disrupted even when various pigments are added, and pigment aggregation is less likely to occur.

Furthermore, it has good safety to the skin, etc., and the conventionally widely used glycerin fatty acid ester, sorbitan fatty acid ester, polyoxyethylene (hereinafter referred to as POE),
It is clearly superior to surfactants such as POE alkyl ether.

The configuration of the present invention will be described below.

The animal hair used in the present invention includes animal hair, human hair,
Means bird feathers and bird feathers.

Examples of animal hair include wool, mink hair, ordinary goat hair,
There are mohair hair, Tibetan hair, camel hair, cashmere hair, llama hair, albaca hair, guanaco hair, angora rabbit hair, raw hair, regular rabbit hair, horse hair, cat hair, pig hair, etc.

Bird feathers and bird feathers include, for example, feathers and feathers of moths, ducks, other waterfowl, chickens, and the like.

One or more of these may be arbitrarily selected and used.

The average particle size of the animal hair fine powder is 0601 μm ~
The thickness is 30 μm, preferably 0.5 μm to 5 μm. When the particle size is less than 0.01 μm or more than 30 μm, it is difficult to obtain a stable emulsion.

The amount of the animal hair fine powder blended is 0.1% to 10% by weight, preferably 0.5% to 5% by weight, based on the total amount of the emulsified composition. If the amount is less than 0.1% by weight, the emulsion composition may not be stabilized, and if it exceeds 10% by weight, the viscosity tends to increase and production becomes difficult.

Oils used in the emulsified composition of the present invention are generally foodstuffs,
Oils used in paints, medicines, cosmetics, etc. can be used - for example, paraffin oil, squalane, paraffin wax, hydrocarbons such as ceresin, olive oil, camellia oil, soybean oil, macadamia nut oil, castor oil, Natural animal and vegetable oils and fats such as lanolin, carnauba wax, candelilla wax, whale wax, beeswax, and jojoba oil, wax, carbon number 10
to 35 fatty acids, alcohols having 10 to 35 carbon atoms, synthetic esters having 16 or more carbon atoms, such as isopropyl myristate, isostearic acid diglyceride, 2-ethylhexanoic acid triglyceride, diisostearyl malate, myristyl myristate etc.

Any one kind or two or more kinds of these oils can be used, and the blending amount is generally 20% by weight to 80% by weight.

In addition to the above-mentioned essential ingredients of fine animal hair powder, oil, and water, the emulsified composition of the present invention may optionally contain other surfactants, humectants,
Dyes, pigments, ultraviolet absorbers, fragrances, medicinal agents, preservatives, antioxidants, etc. can be added as appropriate.

The emulsified composition of the present invention can be used in foods, paints, medicines, cosmetics, etc., and is particularly useful in cosmetics such as lipsticks, creams, and milky lotions.

[Examples] In order to further understand the present invention, Examples and Comparative Examples are listed below. All parts in the example are shown in double boxes.

Example 1 Emulsifying lipstick ■ Castor oil 50 (parts) ■ Glyceryl diisostearate 10 ■ Candelilla wax 8 ■ Solid paraffin
100 Fine wool powder (average particle size 3μm) 4■
Red No. 202 1■ Red No. 202
0.5 ■ Titanium oxide
1 ■ Red iron oxide 1.5
[Phase] Yellow iron oxide 10
ne blue ice making
10 [Phase] Glycerin
3 Manufacturing method ① to ① are uniformly dissolved at 80°C, ① to [phase] are added and dispersed, and 0 and @ are further added to emulsify. While continuing to incubate, it was filled into a molded container and cooled to obtain a lipstick.

Example 2 Cream foundation ■ Isopropyl myristate 17 (parts) ■ Squalane 10 ■ Lanolin
7■ Microcrystalline wax 3■ Fine wool powder (average particle size 5μm) 3■
Butyl roseoxybenzoate 0.1 ■ Kaolin 5 ■ Talc
10■ Titanium oxide
2 [Phase] Red iron oxide 0.20
Yellow iron oxide 0.80 Fragrance
0.10 Purified water
36.70 Propylene glycol
5@Methyl roseoxybenzoate 0.1 Production method Melt ① to ① uniformly at 80°C, add ① to ① to disperse, and further add 0 and 0 to emulsify. The mixture was cooled while stirring to obtain a W10 cream foundation.

The W10 cream foundation produced in this example had good iron oxide dispersibility during production, and neither oil nor water separated even when stored for 3 months at temperatures of 0°C, room temperature, and 37°C. The stability was good.

It also had an excellent creamy feel and caused less makeup smearing.

Comparative Example 1 The wool fine powder in Example 1 was mixed with glycerin monooleate 4
Comparative Example 1 was obtained in the same manner as in Example 1, except that part was replaced.

Comparative Example 2 Comparative Example 2 was obtained in the same manner as in Example 1 except that the fine wool powder POE (40 mol) in Example 2 was replaced with hydrogenated castor oil.

The emulsion type of the prepared sample was confirmed by electrical conductivity, and the emulsion particle size was observed using a microscope. The samples were stored at each temperature for 15 days, and their stability was examined based on the state of separation and changes in particle size.

In Comparative Example 1, water separated immediately after emulsification, and in Comparative Example 2, although it was emulsified, the iron oxide coagulated and the original color could not be obtained. The iron agglomeration progressed further and eventually it all settled.

In contrast, Examples 1 and 2 had good emulsion stability and dispersion stability, and were W10 emulsified cosmetics that were stable for more than 3 months even when left at room temperature of 37° C. and 0° C. conditions.

Example 3 W10 solid foundation ■ Macadamia nut oil 25 (parts) ■ Vaseline
5■ Ceresin
5 ■ Mink hair fine powder (average particle size 0.8 μm) 4 ■ Kaolin 15 ■ Mica
20■ Titanium oxide
8 ■ Red iron oxide 1
■ Yellow iron oxide 3 [phase] Methyl paraoxybenzoate 0.10 Fragrance
0.10 Purified water
10.80 Propylene glycol
3 Manufacturing method Dissolve ■~■ uniformly at 80°C, add ■~0 and disperse, and further add [phase] and ◎ to emulsify. After adding 0 while stirring, the mixture was poured into a container and cooled to obtain a W/○ solid foundation.

Example 4 W10 emulsion is pink ■ 2 Ethylhexanoic acid (part) triglyceride 20 ■ Water-added lanolin 15 ■ Microcrystalline wax 5 ■ Cashmere hair microorganism powder (average particle size 3 μm) 3 ■ Talc 20 ■ Titanium oxide 5 ■ Red oxidation iron
3■ Yellow iron oxide 1
■ Black iron oxide 0.1 [phase] Red No. 201 1 ■ Butyl roseoxybenzoate 0.1 @ Fragrance
0.10 Oval ice 21
．． 7 @ Glycerin 5 Production method Dissolve ■~■ uniformly at 80°C, add ■~[phase] to disperse, and further add 0 and @ to emulsify. After adding 0 while stirring, the W10 emulsion was poured into a container and cooled to obtain a bright red emulsion.

The W10 solid foundation of Example 3 and the W10 emulsified cosmetics of Example 4 have good stability even during long-term storage, have an excellent feeling of use with a creamy feel, and are W10 emulsified cosmetics that cause less makeup deterioration. Ta.

Example 5 Skin lotion ■ Macadamia nut oil 10 (parts) ■ Jojoba oil 15 ■ Lanolin
2■ Wool fine powder (average particle size 0.2
μm) 2 ■ Mohair hair fine powder (average particle size 0.6 μm) 1 ■ Butyl roseoxybenzoate 0.1 ■ Fragrance
0.1 ■ water
64.8 0 Glycerin 5 Production method Dissolve ■ to ■ uniformly at 70°C, and separately mix ■ and ■ uniformly at 70°C. ■ and ■ were added to the mixture of ■ to ■ with stirring, and after emulsifying with a homomixer, ■ was added, and after cooling to room temperature while stirring, the mixture was filled into a container.

The Wlo skin lotion produced in this example was 15
It was stable under any of the following conditions: -10°C, 0°C, 25°C, 37°C, and 50°C. Furthermore, no skin irritation was observed.

Example 6 Night cream ■ Squalane 15 (parts) ■ Olive oil 15 ■ Beeswax
2■ Hydrogenated lanolin alcohol
3 ■ Ceresin 2 ■ Polymethyl methacrylate (average particle size 0.5 μm) 5 ■ Fine wool powder (average particle size 1 μm) 2 ■ Butyl benzoate 0.1 ■ Fragrance
0.1 [shares] water 50
．． 5 0 Sodium chondroitin sulfate 0.30 Propylene glycol 5 Production method Melt ① to ② at 75°C, and separately dissolve ① to ② at 80°C. ① to ③ were added to the mixture of ① to ③ while stirring, and then emulsified using a homomixer. After that, ③ was added, the mixture was cooled to room temperature while stirring, and the mixture was filled into a container.

The W10 night cream obtained in this example had a temperature of -10°C.
It was stable for 15 days or more under any temperature conditions of 0°C, 25°C, 37°C, and 50°C. Furthermore, no skin irritation was observed.

Example 7 Ointment cream ■ Glyceryl diisostearate 8 (parts) ■
Squalane 12■ Hitsuwa
6■ Microcrystalline wax 10■ Vaseline 20■
Medicinal agent 1.8 (average particle size 0
．． 5 μm) 5 ■ Antioxidant 0.2 ■ Fine wool powder (average particle size 0.5 μm) 3.5 ■ Water
Remaining Preparation Method Melt (1) to (2) at 80°C, and add (1) to (2) to the mixture of (1) to (3) at 70°C while stirring. Separately, (1) was heated at 70° C. and added to the mixture of (1) to (2) with stirring, further emulsified with a homomixer, and then cooled with continued stirring to obtain an ointment cream.

The W10 ointment cream obtained in this example was
It was stable for more than 1 month under any of the temperature conditions of °C, 25 °C, 37 °C, and 50 °C. Furthermore, no skin irritation was observed.

Example 70/W Cream■ Purified water 50.8 (parts)
■ Glycerin 6■ Wool powder (
Average particle size 1μm) 6■ Liquid paraffin
2゜■ 2-ethylhexanoic acid triglyceride 10 ■ Lanolin 8■ Preservative
0,1 ■ Fragrance
0.1 Production method Melt ■ to ■ at 70°C, melt ■ to ■ at 70°C, add to ■ to ■ and emulsify. While continuing to stir, cool the
/W cream was obtained.

[Effects of the Invention] The emulsion composition according to the present invention has extremely good storage stability (emulsion stability and dispersion stability) over a wide temperature range compared to conventional compositions. It is also an emulsified composition with extremely high safety in terms of skin irritation. Therefore, it can be applied as an emulsifying composition in various fields, and is particularly useful in the field of cosmetics.

Claims (1)

[Claims] An emulsified composition containing fine animal hair powder having an average particle size of 0.01 μm to 30 μm.