JP3421258B2 - Coated pigment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coated pigment whose surface is coated with a compound having two chains and two hydrophilic groups. 2. Description of the Related Art Metallic soap, N-
Pigments coated with acylamino acids, silicones, and the like are used in cake-type foundations and the like. Metallic soap-coated pigments are excellent in water resistance and adhesion to skin, but lack moist feeling. N-acylamino acid-coated pigments have a slightly moist feeling but are poor in adhesion. Although silicone-coated pigments are excellent in slipperiness, they lack moist feeling. [0003] As described above, as a coating pigment, a pigment having sufficiently excellent adhesion to skin and moist feeling has not yet been developed. [0004] It is an object of the present invention to provide a coated pigment which is excellent in adhesion to the skin, and which has excellent moist feeling and slipperiness. SUMMARY OF THE INVENTION The object of the present invention is to provide a compound of the general formula 1 (Where RCO is a fatty acid residue having 8 to 22 carbon atoms, A is OH or a C1-6 alkylene chain which may be substituted by a carboxyl group, and n is 2 to 2)
6 is an integer, and Y is a carboxyl group . ), Mg, Ca, Zn, C
This is achieved by a coated pigment coated with a polyvalent metal salt selected from o, Al, Ti, Fe, and Zr. [0008] The free acid and the water-soluble salt of the coating substance of the present invention are known from JP-A-8-311003. Further, the polyvalent metal salt of the coating substance of the present invention can be easily obtained as a complex salt obtained by combining this water-soluble salt (eg, sodium, potassium, ammonium, triethanolamine) and a water-soluble polyvalent metal salt. Examples of the water-soluble polyvalent metal salt include MgCl ₂ , MgSO ₄ , and CaCl ₂ Z.
nCl ₂ , ZnSO ₄ , AlCl ₃ , TiCl ₄ , FeCl
₃ , FeSO ₄ , ZrOCl ₂ , CoCl ₂ . The pigments used in the present invention include well-known pigments such as talc, kaolin, mica, sericite, barium sulfate, calcium carbonate, magnesium carbonate, aluminum silicate, magnesium silicate and titanium oxide. Is all. The particle size does not matter. The method of coating these pigments with the above coating materials is a known method described in Japanese Patent No. 2788085. These coated pigments are suitably blended in basic cosmetics, powder foundation, liquid foundation, eye shadow, lipstick, nail color, and other makeup cosmetics and bath additives. EXAMPLES The method of the evaluation test described in the examples is as follows. Practical property test (adhesion to skin, moist feeling) It was examined by a practical test by 10 professional inspectors. Very good adhesion (5 points)
Evaluation was made on a five-point scale of good (4 points), normal (3 points), bad (2 points), and extremely bad (1 point), and the average value of the scores of the ten people was calculated and displayed as follows. −−−−−−−−−−−−−−−−−−−− Average score value Adhesion, moist feeling exceeds 3.8 ○ 2.5 to 3.8 △ less than 2.5 × −−− EXAMPLE 1 Talcethylenediamine-N, N-coated with ethylenediamine-N, N-distearoyl-N, N-dialuminum disuccinate Disodium disodium-N, N-disuccinate disodium 40g 40 g
The resultant was dissolved in 10 liters of water at 10 ° C., and 1 kg of talc was suspended therein. 5% aqueous solution of aluminum sulfate 100
Milliliters were added over 20 minutes via the pump.
Thereafter, the mixture was stirred for 20 minutes, filtered, washed with water, and dried at 110 ° C. This is crushed and ethylenediamine-N, N-
A talc treated with aluminum disuccinate was obtained. Comparative Example 1 Talcethylenediamine-N, N-distearoyl-N, N-coated with aluminum N-stearoyl-L-aspartate
N-stearoyl- in place of disodium disuccinate
A treated pigment was produced in the same manner as in Example 1 except that monosodium L-aspartate was used . [0015] Table 1 shows the results of evaluation of the treated pigments obtained in Example 1 and Comparative Example 1 . [Table 1] The treated pigment of Example 1, adhesion to the skin than treated pigment obtained in Comparative Example 1, are remarkably superior in terms of moist feeling. Application Example 1 100 g of an oily foundation titanium oxide, 10 g of talc, 10 g of mica, 10 g of red iron oxide, 20 g of yellow iron oxide, and 3 g of black iron oxide were suspended in 1 liter of water. After 1.4 g of magnesium chloride was dissolved therein, 200 g of a 4.5% aqueous solution of disodium ethylenediamine-N, N-distearoyl-N, N-disuccinate was uniformly added over 20 minutes. After stirring for further 20 minutes, the mixture was filtered, washed with water, and spray-dried at 80 ° C. Then, the mixture was mixed with a Henschel mixer for 3 minutes to obtain a mixed pigment coated with ethylenediamine-N, N-distearoyl-N, N- magnesium disuccinate. This was applied to an oily foundation. The compounding amount is% by weight. Ingredient A: Coated mixed pigment 40.0 Ingredient B: Liquid paraffin 25.8 Isopropyl palmitate 15.0 Sorbitan monooleate 3.0 Microcristan wax 8.0 Ozokerite 7.0 Candelilla wax 1.0 Preservative 0.2 Ingredient C: Fragrance did. Component A was added thereto, and the mixture was kneaded with a roll mill. This was re-melted, cooled under stirring, added with component C at 60 ° C, poured into a container, and allowed to cool to solidify. This oily foundation was remarkably excellent in adhesion to the skin and moist feeling. As described above, it is apparent that the present invention provides a coated pigment which is remarkably excellent in terms of adhesion to skin and moist feeling.

Claims (1)

(57) [Claims] [Claim 1] [Formula 1] (Where RCO is a fatty acid residue having 8 to 22 carbon atoms, A is an OH or C1-6 alkylene chain which may be substituted by a carboxyl group, n is an integer of 2-6, and Y is Is a carboxyl group .) Mg, Ca, Zn, Co, Al, T
A coated pigment coated with a polyvalent metal salt selected from i, Fe, and Zr.