JPS623808B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a novel cosmetic containing a sodium salt of sulfoethylcellulose. Conventionally, cosmetics have been blended with various water-soluble polymer substances for the purpose of emulsification assisting effect, thickening effect, etc. Water-soluble polymer substances used for this purpose include sodium alginate, Natural polymers such as starch, gelatin, and gum tragacanth, cellulose derivatives such as carboxymethylcellulose sodium salt, methylcellulose, and hydroxyethylcellulose, and synthetic polymers such as polyvinyl alcohol, sodium polyacrylate, polypyrrolidone, and polyethylene oxide are known. However, these known water-soluble polymer substances for cosmetics have drawbacks in terms of stability against acidic substances, polyvalent metal ions, and surfactants in cosmetics, as well as compatibility, heat resistance, storage stability, etc. There are a lot of things, and they haven't reached the point where they can fulfill their functions. For example, water-soluble polymeric substances such as carboxymethylcellulose sodium salt, sodium alginate, and sodium polyacrylate may undergo gelation or precipitation in systems where acidic substances or polyvalent metal ions are present. Furthermore, water-soluble polymeric substances such as gum tragacanth, polyvinyl alcohol, and polyethylene oxide are also unstable to polyvalent metal ions. Furthermore, water-soluble polymeric substances such as hydroxyethyl cellulose and methyl cellulose have a problem of poor compatibility with surfactants. Therefore, the development of water-soluble polymeric substances free from these problems is particularly important in the field of cosmetics. As a result of intensive research into this technical problem, the present inventors found that the sodium salt of sulfoethylcellulose, which has an average degree of substitution of sulfoethyl groups per anhydroglucose unit of 0.2 or more, is extremely suitable as a water-soluble polymeric substance for cosmetics. The present invention was completed after confirming that the invention was correct. That is, the present invention relates to a cosmetic containing the above-mentioned sulfoethylcellulose sodium salt. To explain this, the sulfoethyl cellulose sodium salt used in the present invention can be easily obtained by a conventionally known method, for example, by reacting alkali cellulose with β-chloroethanesulfonic acid sodium salt in a hydrophilic organic solvent such as isopropyl alcohol. can be manufactured. The average degree of substitution of the sulfoethyl group is per anhydroglucose unit.
The average degree of substitution is required to be 0.2 or more (preferably 0.3 or more), and if the average degree of substitution is less than this, the water-solubility property will decrease and this is not desirable for the purpose of the present invention. The above sulfoethyl cellulose sodium salt is
Easily soluble in water, its aqueous solution is thixotropic and non-Newtonian, (1) extremely stable against acidic substances or polyvalent metal ions, (2) highly compatible with surfactants, etc. It has excellent physical properties not found in other water-soluble polymer substances. Therefore, the viscosity of the emulsion in cosmetics, such as creams and milky lotions, containing this substance is increased, and the viscosity of the emulsion is increased, which improves the slippage when applied to the skin and the feel after use, as well as its moisturizing effect, which retains moisture in the skin. brings about the effect of Also various lotions,
By using it as a thickener for shampoos, conditioners, lotions, etc., it can improve the feel and usability of the products, and it can also be used as a binder for make-up products such as lipsticks, eye shadows, whitening powders, etc. can. Furthermore, by using it in combination with other water-soluble polymeric substances such as polyvinyl alcohol, it is possible to obtain an excellent pack with good application slippage. Next, a more detailed explanation will be given with reference examples and examples. Reference Example 1 [Acid resistance test] We prepared 2% aqueous solutions of each of the following water-soluble polymeric substances, changed the pH of each of these aqueous solutions, and examined the viscosity dependence curves. The results were as shown in the drawing. Obtained. However, the viscosity was measured using a B-type viscometer at 20°C. a...Sulfoethylcellulose sodium salt (degree of substitution 0.6): SEC-A c...Same (degree of substitution 1.3): SEC-C d...Same (degree of substitution 2.1): SEC-D e...Same (degree of substitution 2.6) ):SEC-E...Carboxymethylcellulose sodium salt (degree of substitution 0.7)...Sodium alginate...Sodium polyacrylate Reference example 2 [Salt tolerance test] Carboxymethylcellulose sodium salt (degree of substitution 0.7, 2% aqueous solution at 20°C Viscosity 17000 centipoise), gum tragacanth, polyethylene oxide, sulfoethyl cellulose sodium salt
SEC-B (degree of substitution 0.6, viscosity of 2% aqueous solution at 20°C 20,000 centipoise), SEC-C (above),
Prepare 1% aqueous solutions of SEC-D (same) and SEC-E (same), add 10 g of a saturated aqueous solution (20°C) of the inorganic salts shown in Table 1 to 15 g of these aqueous solutions, and add the phase The results of observing the solubility were as shown in Table 1.

[Table] Reference example 3 [Compatibility with surfactant] Hydroxypropyl methyl cellulose (*
1), hydroxyethylcellulose (*2), and a 2% aqueous solution of sulfoethylcellulose sodium salt similar to that shown in Reference Example 2 were prepared, and 40g of each was added with 3.8% of the surfactant shown in Table 2.
When 40 g of the aqueous solution was added and the compatibility was examined, the results shown in the table were obtained. (*1) Degree of hydroxypropoxy group substitution 0.2, degree of methoxy group substitution 1.3, viscosity 15,000 centipoise (2% aqueous solution, 20°C) (*2) Degree of hydroxyethoxy group substitution 2.2, viscosity
10000 centipoise (2% aqueous solution, 20
℃)

[Table] Example 1 After dispersing 10 parts by weight of purified powder pulp (wood pulp) in 100 parts by weight of isopropyl alcohol, 15.4 parts by weight of a 44% aqueous solution of sodium hydroxide and 8 parts by weight of β-chloroethanesulfonic acid sodium salt were added. After heating to 80°C and stirring for 2 hours, acetic acid was added to neutralize excess sodium hydroxide. The reaction product was washed twice with 300 parts by weight of 80% aqueous methanol and dried. The sulfoethylcellulose sodium salt thus obtained had a degree of substitution of 0.6 and a viscosity of a 2% aqueous solution at 20° C. (using a B-type viscometer) of 3500 centipoise. Next, a cleansing cream having the following formulation was prepared using the above sulfoethyl cellulose sodium salt. Liquid paraffin 30.0 parts by weight Vaseline 20.0〃 Water 32.0 parts by weight Stearic acid monoglyceride 10.0〃 Polyoxyethylene sorbitan monolaurate
3.0〃 Glycerin 3.0〃 Sulfoethyl cellulose sodium salt 2.0〃 Fragrances and preservatives Appropriate amount This cleansing cream has excellent stability, spreads easily when used, does not have a sticky feeling, and gives a moist feel. It was hot. Example 2 Using the sulfoethylcellulose sodium salt synthesized in Example 1, a lotion with the following formulation was prepared. Ethanol 10.0 parts by weight Propylene glycol 5.0 Sodium lauryl sulfate 1.5 parts by weight Sulfoethyl cellulose sodium salt 1.0 Water 82.5 Perfume and preservative Appropriate amounts This lotion was easy to use and gave a moist feel. Example 3 Using the sulfoethyl cellulose sodium salt synthesized in Example 1, a milky lotion having the following formulation was prepared. Liquid paraffin 50.0 parts by weight Beeswax 10.0〃 Water 35.0〃 Cetyl alcohol 3.0〃 Sulfoethylcellulose sodium salt 2.0〃 Flavoring and preservatives Appropriate amount This emulsion has excellent stability over time, spreads well when used, and does not feel sticky. , which gave a moist feel. Example 4 After dispersing 10 parts by weight of purified powder pulp in 100 parts by weight of isopropyl alcohol, 15.4 parts by weight of a 44% sodium hydroxide aqueous solution and 6 parts by weight of β-chloroethanesulfonic acid sodium salt were added, and the mixture was heated to 80°C. After stirring for 2 hours, acetic acid was added to neutralize excess sodium hydroxide. 80% of reactants
It was washed twice using 300 parts by weight of water-containing methanol and dried. The sulfoethyl cellulose sodium salt thus obtained had a degree of substitution of 0.43 and a viscosity of a 2% aqueous solution at 20° C. (using a B-type viscometer) of 4900 centipoise. Next, a pack agent having the following formulation was prepared using the above sulfoethyl cellulose sodium salt. Polyvinyl alcohol 20.0 parts by weight Glycerin 4.0 Ethyl alcohol 6.0 Sulfoethylcellulose sodium salt 5.0 Water 65.0 Perfume and preservative Appropriate amounts This pack spreads well during use and had an excellent feel. Example 5 Using the sulfoethyl cellulose sodium salt synthesized in Example 4, a lipstick having the following formulation was made. Beeswax 30.0 parts by weight Castor oil 45.0〃 Lanolin 5.0〃 Hardened oil 3.0〃 Lake 7.0〃 Liquid paraffin 5.0 parts by weight Colorant 2.0〃 Sulfoethyl cellulose sodium salt 3.0〃 Fragrance and preservative appropriate amount This lipstick spreads easily and has excellent moisturizing properties. It gave a moist feel. Example 6 Using the sulfoethyl cellulose sodium salt synthesized in Example 1, a rinse having the following formulation was prepared. Glyceryl monostearate 3.0 parts by weight Alkyldimethylbenzyl ammonium chloride 4.0〃 Water 92.0〃 Fragrance and pigment Appropriate amount This rinse had excellent stability over time, gave good gloss, and gave a moist feel. . Example 7 Using the sulfoethylcellulose sodium salt synthesized in Example 1, a settling lotion having the following formulation was prepared. Ethanol 14.0 parts by weight Glycerin 2.0 Polyoxyethylene sorbitan monolaurate
1.0〃 Sulfoethyl cellulose sodium salt 0.5〃 Water 82.5〃 Perfume and coloring matter appropriate amounts This settling lotion had excellent stability over time, spread well during use, and gave a moist feel. Example 8 Using the sulfoethylcellulose sodium salt synthesized in Example 1, a shampoo having the following formulation was prepared. Lauryl sulfate triethanolamine 10.0 parts by weight Fatty acid monoethanolamide 5.0〃 Sulfoethylcellulose sodium salt 1.0〃 Water 84.0〃 Fragrance and pigment appropriate amount This shampoo has excellent stability over time and gives a moist feel and shine after use. It was hot. Example 9 In the same manner as in Example 1 except that linter pulp was used instead of wood pulp as the refined powder pulp, sulfoethyl cellulose sodium salt (with an average degree of substitution of 0.6 and a 2% aqueous solution having a viscosity of 20,000 centipoise at 20°C) was prepared. SEC-B) was synthesized. Next, a cleansing cream was prepared using the same formulation as in Example 1, and it was found that this cleansing cream had excellent stability, spread well when used, and had a moist feel with little stickiness. It was something that gave. Example 10 A mixture of 8 parts by weight of wood pulp and 2 parts by weight of linter pulp was used as the refined powder pulp instead of 10 parts by weight of wood pulp. 20℃
A sulfoethylcellulose sodium salt (SEC-A) with a viscosity of 4500 centipoise was synthesized. When a lotion was prepared using this in the same formulation as in Example 2, the lotion had an excellent feeling of use and gave a moist feel. Example 11 After dispersing 10 parts by weight of purified powder pulp (linter pulp) in 300 parts by weight of isopropyl alcohol, 39.1 parts by weight of 34% sodium hydroxide aqueous solution and 42.3 parts by weight of β-chloroethanesulfonic acid sodium salt
Parts by weight were added, heated to 80°C and stirred for 2 hours, and then acetic acid was added to neutralize excess sodium hydroxide. The reaction product was washed twice with 300 parts by weight of 80% aqueous methanol, dried, and the average degree of substitution was 1.3.
Sulfoethylcellulose sodium salt (SEC-C), which has a viscosity of 15,000 centipoise at 20°C in a 2% aqueous solution, was synthesized. Example 2 using this
When a lotion with a similar formulation was prepared, the lotion was easy to use and gave a moisturizing feel. Example 12 An emulsion with the same formulation as in Example 3 was prepared using SEC-C synthesized in the previous example. This emulsion had excellent stability over time, spread well during use, and did not have a sticky feeling. It gave a soft, moist feel. Example 13 Using SEC-C synthesized in Example 11, a rinse was prepared with the same formulation as in Example 6, and the rinse had excellent stability over time and gave a moist feel to the hair. It was hot. Example 14 After dispersing 10 parts by weight of SEC-C synthesized in Example 11 in 300 parts by weight of isopropyl alcohol, 39.1 parts by weight of a 34% sodium hydroxide aqueous solution and β-
After adding 50.0 parts by weight of chloroethanesulfonic acid sodium salt, heating to 80°C and stirring for 3 hours,
Acetic acid was added to neutralize excess sodium hydroxide. The product was washed twice with 300 parts by weight of 80% aqueous methanol and dried to give an average degree of substitution of 2.1, 2%.
Sulfoethylcellulose sodium salt (SEC-D) having an aqueous solution having a viscosity of 11000 centipoise at 20°C was obtained. Next, a cleansing cream was prepared using SEC-D with the same formulation as in Example 1, and it was found that this cleansing cream had excellent stability over time, spread well when used, and did not have a sticky feeling.
It gave a moist feel. Example 15 Using SEC-D synthesized in Example 14, an emulsion was prepared in the same manner as in Example 3. The emulsion had excellent stability over time, spread well during use, and was not sticky. It gave a smooth and moist feel. Example 16 Using SEC-D synthesized in Example 14, a pack agent with the same formulation as in Example 4 was prepared. This pack agent spread well during use and had an excellent feel when used. . Example 17 Using SEC-D synthesized in Example 14, a rinse was prepared using the same formulation as in Example 6. The rinse had excellent stability over time and gave a moist feel to the hair. It was hot. Example 18 Using SEC-D synthesized in Example 14, a settling lotion was prepared using the same formulation as in Example 7. This settling lotion had excellent stability over time, excellent spreadability during use, It gave a moist feel. Example 19 Using SEC-D synthesized in Example 14, shampoo was prepared in the same manner as in Example 8.
This shampoo does not become cloudy even under low temperature conditions.
It also had excellent stability over time. Example 20 After dispersing 10 parts by weight of SEC-D synthesized in Example 14 in 300 parts by weight of isopropyl alcohol, 39.1 parts by weight of a 40% sodium hydroxide aqueous solution and β-
After adding 55 parts by weight of chloroethanesulfonic acid sodium salt and stirring at 80° C. for 4 hours, acetic acid was added to neutralize excess sodium hydroxide.
The product was washed four times with 300 parts by weight of 90% aqueous methanol, dried, and converted into sulfoethylcellulose sodium salt (SEC-
E) was obtained. Next, a lotion was prepared using SEC-E with the same formulation as in Example 2, and this lotion had the following:
It was easy to use and gave a moist feel. Example 21 Using SEC-E synthesized in Example 20, an emulsion was prepared using the same formulation as in Example 3. The emulsion had excellent stability over time, spread well during use, and was not sticky. It gave a smooth and moist feel. Example 22 A lipstick was prepared using SEC-E synthesized in Example 20 with the same formulation as in Example 5. The lipstick spread well, had excellent heat retention, and gave a moist feel. It was hot. Example 23 Using SEC-E synthesized in Example 20, a rinse was prepared with the same formulation as in Example 6, and the rinse had excellent stability over time and gave a moist feel to the hair. It was hot. Example 24 Using SEC-E synthesized in Example 20, a settling lotion was prepared using the same formulation as in Example 7. This settling lotion had excellent stability over time and good spreadability during use. , which gave a moist feel. Example 25 Using SEC-E synthesized in Example 20, shampoo was prepared in the same manner as in Example 8.
This shampoo does not become cloudy even under low temperature conditions.
It also had excellent stability over time.

[Brief explanation of the drawing]

The drawing shows viscosity dependence curves when 2% aqueous solutions of various water-soluble polymers were prepared according to Reference Example 1 and the pH of each of these aqueous solutions was changed.

Claims (1)

[Claims] 1. A cosmetic comprising a sodium salt of sulfoethyl cellulose having an average degree of substitution of sulfoethyl groups per anhydroglucose unit of 0.2 or more.