JPS6030285B2 - W/O type cream - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a W/O type (water-in-oil type) skin-friendly cream that has a high water content and has good storage stability, heat retention, texture, texture, etc.

Conventionally, as a base for creams, W/O emulsions are generally superior to W/O (oil-in-water) emulsions in many respects, such as protecting the skin and maintaining flexibility. It is well known that

However, W/O type emulsions have some problems with quality stability, etc., and in order to improve the stability, it is necessary to improve the stability by increasing the amount of oil (oil-based substance) or increasing the viscosity. However, as a result, creams tend to be unnecessarily sticky, oily, and other disadvantages, which may be disliked by consumers. Research has also been conducted on adding a large amount of water (40 to 5% by weight) to improve stickiness and oiliness; There are problems such as poor stability such as decomposition and damage to appearance, and a satisfactory method has not yet been found. In view of the current situation, the present inventor conducted extensive research and found that when a fatty acid alkanolamide and a polyol fatty acid ester type nonionic surfactant are used together as an emulsifier, a large amount of water (55 to 92% by weight) should be added. The present invention was completed based on the discovery that a uniform W/O type skin cream with excellent storage stability can be easily obtained.

The purpose of the present invention is to provide W/O that has a high moisture content, excellent storage stability, and uniformity, is non-irritating to the skin, and can provide a good feel, heat retention effect, novelty, and anti-aging effect. Our goal is to provide mold cream.

That is, the present invention uses emulsifiers of the general formula (in the formula, R is an alkyl group or alkenyl group having 6 to 22 carbon atoms, A is hydrogen or -CQC, -CH2C
H(OH)CH3 group, A' is -CH2CH20 group or -CH2CH(OH)CH3 group.

) is 0.5 to 2.
5% by weight (based on the total amount of the formulation; the same applies hereinafter), the polyol fatty acid ester type nonionic surfactant contains 1 to 7% by weight, and the water content is 55 to 9% by weight, and the oil content is 5% by weight. W/ characterized in that it is 6 to 4% by weight.
It is a ○ type cream. The fatty acid alkanolamide contained (used) in the W/O type cream of the present invention has the general formula (R
is an alkyl group or alkenyl group having 6 to 22 carbon atoms, A is hydrogen or -CH2CH sunset group, -CH2CH(OH)C
H3 group, A' is -CQC day 20 day group or -CH day 20 day group (
OH)CH It is a built grave.

), such as monoethanolamide, monoisobanolamide, diethanolamide, diisopro/f-nolamide, etc. of the above-mentioned fatty acid (alkyl group or alkenyl group has 6 to 12 carbon atoms).

They may be used singly or in combination. The amount used (content) is 0.2 to 2.5% by weight, preferably 0.3 to 2% based on the total amount of the composition. 0. If it is less than 2.5% by weight, the storage stability of the cream tends to decrease, and if it is more than 2.5% by weight, the composition tends to have poor storage stability, is irritating to the skin, and tends to have a bad feel.

Examples of the polyol fatty acid ester type nonionic surfactant include sorbitol, sorpitan, glycerin, diglycerin, mannitol, bentaerythritol, propylene glycol, or dipropylene glycol, and a fatty acid whose alkyl group or alkenyl group has 11 to 22 carbon atoms. Esters consisting of sorbitol monooleate, sorbitan monooleate, glyceryl monooleate, diglyceryl monooleate, mannitol monooleate, pentaelthritol monooleate, propylene glycol monooleate, dipropylene glycol monooleate, dioleic acid are preferred. Sorbitan, sorbitol dioleate, glyceryl dioleate, diglycerine dioleate, mannitol dioleate, pentaelthritol dioleate, propylene glycol dioleate, dibropylene glycol dioleate, sorbitol trioleate, sorbitan trioleate, triolein Acid diglycerin, mannitol trioleate, sorbitol monostearate, sorbitan monostearate, glyceryl monostearate, diglyceryl monostearate, mannitol monostearate, propylene glycol monostearate, dipropylene glycol monostearate, distearic acid Sorbitol, sorbitan distearate,
Examples include diglyceryl distearate and mannitol distearate. Polyol fatty acid ester type nonionic surfactants are used singly or in combination, and the amount (content) used is 1 to 7% by weight, preferably 2 to 5% by weight based on the weight of the composition. . If it is less than 1% by weight, the storage stability of the composition tends to be poor, and if it is more than 7% by weight, the storage stability and texture (uniformity) of the cream tend to be poor.

The water content is between 55 and 9% by weight relative to the weight of the composition;
Preferably it is 57-8% by weight. If it is less than 55% by weight, the product tends to have a strong oily feel, and if it is more than 9% by weight, the stability of the composition will deteriorate.

The oil (oily substance) used in the present invention is an oily substance commonly used in creams, such as liquid or pasty hydrocarbons, linear fatty acid ester oil, branched fatty acid ester oil, waxes, etc. Examples include vegetable oils, animal oils, hydrogenated vegetable oils, and hydrogenated animal oils.

Liquid or pasty aliphatic hydrocarbons are aliphatic hydrocarbons that are liquid or paste-like at room temperature and are known as additive components of cosmetics, such as hydrogenated liquid paraffin, squalane, pristane, and polyisobutylene. Preferred examples include oligomers of Q-olefins having 3 to 12 carbon atoms or hydrogenated products thereof.

More specifically, liquid puffin (light oil, medium oil,
heavy oil), squalane, synthetic squalane, pristane, octene-1 polymer (oil), dodecene-1 polymer (oil),
oil), 2,6,15,19,23-hexamethyltetracosane, liquid polyisobutylene, liquid polyisobutene,
Examples include betrolatum and petrolatum.
Examples of fatty acid ester oils with a linear structure include butyl stearate, hexyl laurate, butyl/ylumitate, butyl myristate, hexyl stearate, hexyl palmitate, hexyl myristate, butyl oleate, and hexyl oleate. , hexadecyl adibate. The fatty acid ester oil having a branched chain structure used in the present invention is a known fatty acid ester oil in which the alkyl group or alkenyl group of the fatty acid residue and/or alcohol residue has a branched structure,
For example, isopropyl isostearate, isof. Lopyl n-stearate, mono 2-ethylhexyl succinate, di-2-hexyldecyl sebacate, dioctyl dodecyl se/sucate, diisostearyl succinate, di-2-ethylhexyl succinate, isopropyl myristate, isopropyl parimi tate, 2-hexyldecyl palmitate, di-2-hexyldecyl palmitate, innonyl isononate, di-2-hexyldecyl palmitate, innonyl isononate, indecyl isononate, intridecyl nonate, diisopropylazibe -t, di-2-ethylhexylazibe-
diisopropyl se/glucate, 2-ethylhexyl palmitate, octyldodecyl myristate, 2-hexyldecyl isostearate, isostearyl isostearate, 2-octyldecyl isostearate, di-stearyl maleate, di-isostearyl tartrate, isomyristyl isomyristate, 2-hexyl neodicanoate, isostearyl 2-ethylhexylhexanate, 2-octyldodecyl 2-ethylhexanate, isopropyl isostearate, isobutyl iso/glumitate Preferred examples include stearate, isobutyl isoeicosanate, octyldodecyl myristate, or a combination thereof.Other examples include parcellin oil, parcellin solid,
Carnawa wax, whale wax, etc. can be used. The above-mentioned oily substances are used singly or in combination, and the amount used (content) is 6 to 6 to
4% by weight, preferably 10-30% by weight.

When it is less than 6% by weight, it loses its function as a lipophilic cream and tends to become a hydrophilic cream, which may lead to decreased storage stability and phase inversion, and when it exceeds 4% by weight. Storage stability and skin compatibility (affinity) may deteriorate, the oily feel may be too strong, and the moist feeling may be lost.

The W/O type cream of the present invention comprises a homogeneous mixture of a required amount of alkylolamide, a polyol fatty acid ester type nonionic surfactant, and an oily substance.
It is produced by mixing water (85q0 to 90qo) into the melt, adding fragrance and preservatives, and cooling it to room temperature. The present invention achieves the synergistic effect of the fatty acid alkanolamide contained as an emulsifier and the polyol fatty acid ester type nonionic surfactant.
It is possible to form a W/0 cream that can stably contain a large amount (55 to 92% by weight) of water and has excellent storage stability and homogeneity.

Although this W/O type cream contains a large amount of water, even if stored for a long time (approximately 2 years), the oil will not ooze out (ooze) or the water will separate due to phase inversion. Extremely stable, with a fine-textured, milky white appearance and W/O type emulsification system (
It maintains an electrical conductivity of 0), is non-irritating to the skin, has a good feel (moisturizing, does not give a sticky or sticky feel, etc.), has a moisturizing effect, has affinity, and prevents roughness. It has extremely high commercial value as it can provide effectiveness, flexibility, and smoothness. Examples of the present invention will be described below.

In the Examples, "part" means part by weight, and "%" means % by weight.
Example 1m Composition of W/○ type cream of the present invention 1 part lauric acid jetanolamide (pure part) Liquid paraffin (Seibold 70) (pure part) 15 parts Density wax (pure part)
Sorbitan sesquioleate (pure) 3 parts butylparaben
0.1 part fragrance 0.1 part water 70.8 parts stiffness
Method for producing W/O type cream: Add lauric acid jetanolamide, liquid paraffin, beeswax, sorbitan sesquioleate, and preservatives to a homogeneous solution at 85°C to 90°C, and gradually add water at 8,500 to 9,000° C. In addition,
Mix and cool to room temperature.

Thereafter, the fragrance was mixed while stirring to obtain a W/○ type cream composition of the present invention. Example 2 Olefinic acid monoethanolamide (pure content) 0.4 parts Polyisobutene (pure content) 2 Tomitsu wax (pure content) 8 parts Mannitol monooleate 3.6 parts Butylparaben
0.1 part fragrance
0.1 part water 67.8
Part t31 The manufacturing method of Example 2 is the same as that of Example 1.

Example 3 Myristic acid inpropanolamide (purity) 0.6 parts Butyl stearate (purity) 17 parts Whale.

C. 4th secret.

C 6 parts diglycerin monooleate 4 parts butyl paraben
0.1 part fragrance 0.1
Part water 68.2 parts {
41 The manufacturing method of Example 3 is the same as Example 1.

Comparative Examples 1 to 4 ■ As Comparative Example 1, polyoxyethylene lauryl ether (marked with a circle) was used instead of lauric acid jetanolamide.
The same procedure as in Example 1 of the present invention was carried out except that .

(2) Comparative Example 2 was carried out in the same manner as Example 1 of the present invention, except that lauric acid jetanolamide was not used.

(2) Comparative Example 3 was carried out in the same manner as Example 1 of the present invention, except that sorbitan sesquioleate was not used.

(2) Comparative Example 4 was carried out in the same manner as Example 1 of the present invention, except that 1 part of aluminum stearate was substituted for a part of sorbitan sesquioleate.

[6} Next, the storage stability, appearance, and sensory tests (moist feeling, heat retention effect, blending into the skin, anti-aging effect) of the creams of the present invention and comparative examples were examined.

The results are shown in Table 1. In addition, the appearance in Table 1 is observed with the naked eye, and the storage stability is -1oo0 for 2 weeks, 4500
When stored in a constant temperature room for 6 months on a 2-week cycle, the condition is unstable if oil stains, water separates, or pigment spills, and the color and odor do not change, resulting in a uniform finish. The condition of the cream was stable. The sensory test was conducted with a panel of 20 women between the ages of 35 and 45, and the number is the number of people who answered that the product was good. Table 1 (Note) Microscope test Each sample was observed using an Olympus microscope at a magnification of 400 times. Uniform indicates that the particles are neatly arranged, and non-uniform indicates that the particles are not arranged.

Dyeing method Approximately 1? Place it on a watch glass, dissolve 0.1 ml (Red No. 225) in olive oil, and pour the solution close to the sample.When the red color is concentrated on the sample and the color is clean, it is dyed. When dyed, it was considered semi-dyed, and when it did not spread at all, it was called undyed.

situation W/○: Indicates lipophilic state ○/W: Indicates a hydrophilic state.

As is clear from this result, Examples 1 and 2 of the present invention,
Cream No. 3 is significantly superior in lipophilicity, storage stability, and organoleptic properties compared to the composition of Comparative Example.

Even if a related component is used in place of the component of the present invention, a good W/○ type cream cannot be obtained. Example 4 The same procedure as in Example 2 of the present invention was carried out, except that the content of oleic acid monoethanolamide was varied as shown in Table 2, and the amount of water was adjusted so that the total amount was 10 times.

The results are shown in Table 2. Table 2 Oleic acid monomer Storage stability Microscope Test after 6 months of dye tanolamide Content (high) o
Unstable Uneven No beam ○-1 ″ ″ ″o.2
Stable heterogeneous construction 0.3; ◇
Red beam 0.4″0.
5 ″ ″ ″1・
″ 〃 〃1.5
″ ″ ″2 ″ ″ ″2.
5 ″ ″ Light beam 3 Unstable Nonuniform ″ Table 3 shows the results of the sensory test.

Table 3: Heat retention content (amount) that blends well with the skin.
No effect○ 〇 〇 〇0.2 11 11 130.4
20 19 190.6
20 19 191 18 18 1
72 17 18 17 2.5 15 16 143
0 o 3 As is clear from the results in Tables 2 and 3,
The content of oleic acid monoethanolamide is 0.2-2
．． 5%, preferably 0.3-2%.

Example 5 The content of solpitan sesquioleate was
The same procedure as in Example 1 of the present invention was carried out except that the amount of water was varied as shown in the table and the amount of water was adjusted so that the total amount was 10 eaves.

4th notation 1 Shogun Harm Poison Mist Mound Proverb Fog Mist Year Revealing Difficulty Color Qin Method Stable 7 1 Red dyeing 4 ″ 5 〃 ″ ″ 6 〃 〃 Clear dyeing 7 ″ ″ 〃 8 Unstable Heterogeneity No beam As is clear from these results, the content of sesquioleic acid sorbitan ester is preferably 1 to 7%. is 2-5%.

Example 6 Same as Example 1 of the present invention, except that the content of oily substances (liquid paraffin and beeswax) was changed as shown in Table 5, and the amount of water was adjusted so that the total amount was 10 parts. I did it.

The results are shown in Table 5. Table 5 Oily substances Storage stability Microscope Pigment method Skin compatibility Heat retention effect Sticky content image) (After 6 months) Test
Good person Not 4 Unstable
Non-uniform undyed o o 136
Stable uniform torozome 15
14 168″ 〃 17
15 18lo 〃 〃 Red dyeing
17 17 1815 ″ 〃
″ 18 18 1820 〃
〃 ″ 18 18 1825 〃
〃 〃 20 18 1830″
〃 ″ 20 18 1835
″ 〃 ″ 20 18 173
7 ″ 〃 ″ 19 17 17
40″ 〃 Barrel dyed 14
13 1245 unstable non-uniform
Mujiang 3 2 1 As is clear from this result, the content of oily substances (total amount of liquid paraffin and beeswax) is 6 to 40%, preferably 10 to 37%.
It is.

Example 7 Instead of sorbitan sesquiolefinate, sorbitol monooleate, sorbine monooleate, glycerin monooleate, diglycerine monooleate, mannitol monooleate, pentaerythritol monooleate, propylene glycol monooleate, diglycerine monooleate, Propylene glycol, sorbitan dioleate, sorbitol dioleate, glyceryl dioleate, diglycerine dioleate, mannitol dioleate, pentaerythritol dioleate, propylene glycol dioleate, diprobylene glycol dioleate, sorbitol triolenoate, sorbitan trioleate , diglyceryl trioleate, mannitol trioleate, sorbitol monostearate, sorbitan monostearate, glyceryl monostearate, diglyceryl monostearate, mannitol monostearate, propylene glycol monostearate, dipropylene glycol monostearate The same procedure as in Example 1 was carried out except that sorbitol distearate, sorbitan distearate, diglyceryl distearate, and mannitol distearate were used.

As a result, all the creams obtained formed a uniform water-in-oil emulsion, similar to the cream of Example 1, and remained stable even after 6 months, with no abnormalities observed. The results of the sensory test were also good. Example 9 Substitutes for lauric acid jetalamide, lauric acid monoethanolamide, and lauric acid monoisof.

The same procedure as in Example 1 was conducted except that lopanolamide, myristic acid monoethanolamide, lauric acid diisopropanolamide, myristic acid jetanolamide, myristic acid monoisovanolamide, and myristic acid diisopropanolamide were used. Each of the obtained creams formed a uniform W/O emulsion similar to the cream of Example 1, and remained stable with no abnormalities observed even after 6 months. In addition, as a result of the sensory test, more than 18 out of 20 people answered that the heat retention effect, moisturizing effect, and texture were good on the skin. Example 10 15 parts of liquid paraffin, 10 parts of beeswax, 70.8 parts of water,
Instead of 3 parts of sorbitan sesquioleate, a mixture of water, liquid paraffin and beeswax (mixing ratio 1:1) (oil content)
The same procedure as in Example 1 was conducted except that sorbitan sesquioleate and sorbitan sesquioleate were used in the amounts shown in Table 6.

The results for each cream obtained are shown in Table 6. Table 6 Water and oil content A (after toxicity) Unba Shizuku dye method Production cost and heat retention effect Sticky ■ ■ Association
Not 50 44 4 Unstable Non-uniform Unstained 4 4 355 40
3.8 Stable uniform construction 14
13 1357 37 4″
″ Red dyeing 18 17 1660 34
4 ″ ″ ″ 19 18 1765
29 4 ″ 〃 〃 20 18 1
870 24 4 ″ ″ ″ 20 18
187519 4 ″ ″ ″ 18 18
1880 15 3 〃 〃 ″
18 18 1890 6 3″
〃 Camphor dye 16 14 1493 3
3 Unstable Non-uniform Undyed 1 2
1 As is clear from this result, the water content is 55 to 90%, preferably 57 to 80%.

Example 11 Squalane, pristane, betrolatum, vaseline, butyl stearate, hexyl laurate, butyl/gulmitate, hexyl stearate, hexyl palmitate, hexyl myristate, phthyl oleate were added in place of the beeswax female part and 15 parts of liquid paraffin. Isopropyl isostearate, isopropyl n-stearate, mono-2-ethylhexyl succinate, di-2-hexyldecyl sepacate, di-octyl dodecyl succinate, diisostesaryl succinate, di-2-ethylhexyl succinate nate, isopropyl myristate, isof.

Claims (1)

[Claims] 1 Emulsifiers include general formulas ▲ mathematical formulas, chemical formulas, tables, etc.
H_2CH(OH)CH_3 group, A' is -CH_2CH
It is a _2OH group or a -CH_2CH(OH)CH_3 group. ) is 0.5 to 2.
5% by weight (based on the total amount of the formulation; the same applies hereinafter) and 1 to 7% by weight of polyol fatty acid ester type nonionic surfactant.
and has a moisture content of 55 to 90% by weight and an oil content of 6 to 40% by weight.
/O type cream. 2 The polyol fatty acid ester type nonionic surfactant contains sorbitol, sorbitan, glycerin, diglycerin, mannitol, pentaerythritol, propylene glycol or dipropylene glycol, and an alkyl group or alkenyl group having 11 carbon atoms.
The W/O cream according to claim 1, which is an ester consisting of ~12 fatty acids, or a combination thereof.