JP2007056086A - Pigment-containing cellulose powder and cosmetic, resin and coating containing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pigment-containing cellulose powder which is capable of exerting a masking effect due to its light-scattering property and imparting a transparency and a soft feel to a coating film to create a luxury look, and a cosmetic, a resin and a coating containing the same. <P>SOLUTION: The pigment-containing cellulose powder is obtained by making a cellulose powder to contain, based on its mass, 1-200 mass% pigment at its surface and interior. The obtained pigment-containing cellulose powder is compounded with the cosmetic, the resin and the coating. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pigment-encapsulating cellulose powder that encapsulates a pigment, and a cosmetic, resin, and paint containing the same.

  Conventionally, cellulose powder has been produced by various production methods (for example, see Patent Document 1), and has been widely applied to cosmetics and the like (for example, see Patent Document 2). In a cosmetic containing cellulose powder, the effect of improving the feel of the cosmetic is obtained.

Japanese Patent No. 3287798 Japanese Patent No. 2608786

  In general, makeup cosmetics contain pigments such as titanium oxide and iron oxide, and these pigments can cover skin defects such as stains and freckles.

  However, the conventional makeup cosmetics have a problem in that pigments accumulate on the facets of the skin and the lips of the lips and make them stand out instead.

  If the cellulose powder can be made to have a light scattering property and exert a concealing effect, when the cellulose powder is blended into a cosmetic, the properties of the cellulose powder itself In addition to improving the touch, it is possible to make small wrinkles on the skin less visible and to make the lip vertical lines less noticeable. In addition, when such cellulose powder is blended in a resin or paint, it is possible to give a high-class feeling by imparting transparency and soft touch to the coating film.

  The present invention has been made in view of such circumstances, has a light scattering property and can exhibit a concealing effect, and gives a high-class feeling by imparting transparency and soft touch to the coating film. It is an object of the present invention to provide a pigment-encapsulating cellulose powder that can be used, and cosmetics, resins, and paints containing the same.

  As a result of extensive research, the inventor has included a pigment in cellulose powder in the range of 1 to 200% by mass of its own weight, and preferably has a primary particle diameter in the range of 3 to 30 μm and an average. The inventors have found that an optical effect and a soft feel can be imparted by controlling the primary particle diameter to be in the range of 7 to 15 μm, and have completed the present invention.

In short, in order to achieve the above object, the pigment-encapsulated cellulose powder according to the first invention is:
It is characterized in that a pigment is encapsulated in the range of 1 to 200% by mass of its own weight on the surface and inside of cellulose powder.

  In the first invention, the pigment is preferably one or more pigments selected from the group consisting of titanium oxide, surface-treated zinc oxide, cerium oxide, silica and zirconia (second invention).

  In the first invention or the second invention, it is preferable that the whiteness when applied to black paper increases as the reflection angle increases (third invention).

  In the first to third inventions, it is preferable that the primary particle diameter of 90% or more of all the particles is in the range of 3 to 30 μm and the average primary particle diameter is in the range of 7 to 15 μm (fourth invention). ).

Next, the cosmetic according to the fifth invention is:
The pigment-containing cellulose powder according to any one of the first to fourth inventions is contained.

  In the fifth invention, it is preferable to incorporate a silicone elastomer (sixth invention).

  In the fifth or sixth invention, titanium mica is preferably blended (seventh invention).

The resin according to the eighth invention is
The pigment-containing cellulose powder according to any one of the first to fourth inventions is contained.

The paint according to the ninth invention is
The pigment-containing cellulose powder according to any one of the first to fourth inventions is contained.

  According to the pigment-encapsulated cellulose powder of the present invention, the pigment is encapsulated in the range of 1 to 200% by mass of its own weight on the surface and inside of the cellulose powder. In other words, the pigment is encapsulated in the surface and inside of the cellulose powder. Since it is dispersed in the range of 200% by mass (see FIG. 1 and FIG. 2), it has a light scattering property and can exhibit a concealing effect, and gives a high-quality feeling by imparting transparency and soft touch to the coating film. Can be created. In addition, according to the cosmetic containing this pigment-encapsulating cellulose powder, the effect of making it difficult to see the small wrinkles on the skin and making the vertical lines of the lips less noticeable by gradually diffusing the incident light. In addition, the effect of making the cosmetic look natural can be obtained by scattering light. In addition, according to the resin or paint in which the pigment-encapsulating cellulose powder is blended, it is possible to obtain an effect that the coating film has a transparent feeling, the touch when the coating film is touched becomes soft, and a high-class feeling can be obtained. The pigment-encapsulated cellulose powder of the present invention has the property of scattering light with anisotropy instead of being uniform, so that it has an optically deep appearance such that the color appears to change depending on how light enters. There is an advantage that can be obtained.

  Next, specific embodiments of the pigment-containing cellulose powder according to the present invention and cosmetics, resins, and paints containing the same will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, the pigment-encapsulated cellulose powder of the present invention is one in which the pigment is encapsulated in the range of 1 to 200 mass% of its own weight on the surface and inside of the cellulose powder, in other words, the cellulose powder. The pigment is dispersed on the surface and inside in the range of 1 to 200% by mass of its own weight.

  As the pigment, a conventionally known pigment can be used, and its shape (spherical, rod-like, needle-like, plate-like, indeterminate shape, scale-like, spindle-like, etc.), particle size (smoke-like, fine particle, pigment) Grades) and particle structures (porous, nonporous, etc.) can be used. For example, inorganic powder, organic powder, surfactant metal salt powder, colored pigment, pearl Examples thereof include pigments and metal powder pigments.

  Examples of the inorganic powder include titanium oxide, zirconium oxide, zinc oxide, cerium oxide, magnesium oxide, barium sulfate, calcium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, talc, mica, kaolin, sericite, muscovite, Synthetic mica, phlogopite, saucite, biotite, lithia mica, silicic acid, anhydrous silicic acid, aluminum silicate, magnesium silicate, magnesium aluminum silicate, calcium silicate, barium silicate, strontium silicate, metal tungstate Salt, hydroxyapatite, vermiculite, hydrite, bentonite, montmorillonite, hectorite, zeolite, ceramic powder, dicalcium phosphate, alumina, aluminum hydroxide, boron nitride, boron nitride, silica, etc. It is.

  Examples of the organic powder include polyamide powder, polyester powder, polyethylene powder, polypropylene powder, polystyrene powder, polyurethane powder, benzoguanamine powder, polymethylbenzoguanamine powder, polytetrafluoroethylene powder, polymethylmethacrylate powder, cellulose, silk Powder, nylon powder, 12 nylon, 6 nylon, acrylic powder, acrylic elastomer, styrene / acrylic acid copolymer, divinylbenzene / styrene copolymer, vinyl resin, urea resin, phenol resin, fluorine resin, silicon resin, acrylic resin Melamine resin, epoxy resin, polycarbonate resin, microcrystalline fiber powder, starch powder, lauroyl lysine and the like.

  Examples of the surfactant metal salt powder (metal soap) include zinc stearate, aluminum stearate, calcium stearate, magnesium stearate, zinc myristate, magnesium myristate, zinc cetyl phosphate, calcium cetyl phosphate, and cetyl phosphate. Examples include zinc sodium.

  Examples of the colored pigment include inorganic red pigments such as iron oxide, iron hydroxide and iron titanate, inorganic brown pigments such as γ-iron oxide, inorganic yellow pigments such as yellow iron oxide and loess, black iron oxide , Inorganic black pigments such as carbon black, inorganic purple pigments such as manganese violet and cobalt violet, inorganic green pigments such as chromium hydroxide, chromium oxide, cobalt oxide and cobalt titanate, inorganic blue pigments such as bitumen and ultramarine blue, fine particles Examples include fine particle powders such as titanium oxide, fine particle cerium oxide, and fine particle zinc oxide, those obtained by lacquering tar dyes, those obtained by lacquering natural dyes, and synthetic resin powders obtained by combining these powders. .

  Examples of the pearl pigment include titanium oxide-coated mica, titanium oxide-coated mica, bismuth oxychloride, titanium oxide-coated bismuth oxychloride, titanium oxide-coated talc, fish scale foil, and titanium oxide-coated colored mica.

  Examples of the metal powder pigment include aluminum powder, copper powder, and stainless steel powder.

  Here, in the pigment-encapsulating cellulose powder of the present invention, it is preferable that at least one selected from the group consisting of titanium oxide, surface-treated zinc oxide, cerium oxide, silica and zirconia is selected as the pigment to be used. Any of those listed in this group can scatter light more effectively.

  In the pigment-encapsulated cellulose powder of the present invention, it is assumed that the pigment is encapsulated in the range of 1 to 200% by mass of its own weight on the surface and inside of the cellulose powder. The pigment is preferably blended in the range of 15 to 35% by mass, and when it is desired to have a deep optical effect in the hiding of the eyelids and the coating film, the pigment is blended in the range of 1 to 15% by mass. It is preferable. In the latter case, it is more effective to use a material having a relatively low refractive index such as silica, barium sulfate, or calcium carbonate. Here, if the amount of the pigment is less than 1% by mass of its own weight, it is not possible to obtain the optical effect due to the blending of the pigment. On the other hand, if the amount of the pigment exceeds 200% by mass of its own weight, the pigment is not uniformly dispersed in the cellulose matrix, so that not only the composite particles become unstable but also the dropping of the pigment increases, which is not preferable.

  The pigment-encapsulating cellulose powder of the present invention preferably has a spherical or substantially spherical shape. By providing such a shape, it is possible to obtain an advantage that light scattering is more effectively performed and that the touch becomes smoother.

As a manufacturing method of the pigment inclusion cellulose powder of this invention, the manufacturing method which consists of the process of following (1)-(4) is mentioned, for example.
(1) A viscose containing a pigment is prepared.
(2) The viscose and an aqueous solution of a water-soluble anionic polymer are mixed to produce a fine particle dispersion of viscose containing a pigment.
(3) The fine particle dispersion is overheated to solidify the viscose in the fine particle dispersion, and further neutralized with an acid to produce cellulose fine particles containing a pigment.
(4) The cellulose fine particles are separated from the mother liquor and, if necessary, washed and dried.

  Here, the viscose is a raw material of cellulose, and those having a gamma value of 30 to 100% by mass and an alkali concentration of 4 to 10% by mass are preferably used. Examples of the water-soluble anionic polymer include sodium polyacrylate and sodium polystyrene sulfonate.

  The pigment-encapsulated cellulose powder of the present invention may be subjected to various conventionally known surface treatments. Examples of such surface treatment include fluorine compound treatment (perfluoroalkyl phosphate ester treatment, perfluoroalkylsilane treatment, perfluoropolyether treatment, fluorosilicone treatment, fluorinated silicone resin treatment, etc.), silicone treatment (methyl hydrogen poly Siloxane treatment, dimethylpolysiloxane treatment, vapor phase tetramethyltetrahydrogencyclotetrasiloxane treatment, etc.), silicone resin treatment (trimethylsiloxysilicic acid treatment, etc.), pendant treatment (addition of alkyl chain etc. after vapor phase silicone treatment) Method), silane coupling agent treatment, titanium coupling agent treatment, aluminum coupling agent treatment, silane treatment (alkylated silane, alkylated silazane treatment, etc.), oil agent treatment, N-acylated lysine treatment, poly Acrylic acid treatment, metal soap treatment (a stearate salt or myristate treatment, etc.), acrylic resin treatment, may be mentioned a metal oxide treatment, also may be used by combining a plurality of these processes.

  In the present invention, it is preferable that the whiteness when the pigment-encapsulated cellulose powder thus obtained is applied to black paper increases as the reflection angle increases. As a measuring method of the whiteness for each reflection angle, for example, it can be examined using a goniocolorimeter or a goniospectrophotometer. In addition, as an incident angle at the time of measurement, 45 degrees is preferable because the results are easily understood.

  In the pigment-encapsulated cellulose powder of the present invention, the average primary particle diameter is in the range of 1 to 50 μm, the maximum particle diameter is preferably 100 μm or less, and the average primary particle diameter is particularly in the range of 7 to 15 μm. The primary particle size of 90% or more of all particles is preferably in the range of 3 to 30 μm. Within this range, there is an advantage that the desired optical effect can be effectively obtained. Here, examples of the primary particle diameter measuring method include a method of image-wise extraction and determination from a photograph observed with an electron microscope, and a method of measuring using a particle size distribution measuring device such as a laser diffraction particle size distribution meter. However, since the particles themselves have optical characteristics, measurement using an electron microscope is preferable.

  Next, the cosmetic of the present invention will be described below.

  The cosmetic of the present invention contains the above-described pigment-encapsulating cellulose powder. In the cosmetic of the present invention, the pigment-encapsulated cellulose powder can be blended in the range of 0.1 to 99% by mass with respect to the mass of the cosmetic, more preferably in the range of 1 to 50% by mass. It is good to mix with.

  In the cosmetics of the present invention, oils, surfactants, pigments, preservatives, fragrances, moisturizers, salts, solvents, resins, antioxidants, chelating agents, neutralizing agents, pH adjustments usually used in cosmetics Various components such as an agent, an insect repellent and a physiologically active component can be used as long as the object of the present invention is not impaired.

  Examples of the oil include avocado oil, linseed oil, almond oil, ibotarou, eno oil, olive oil, cacao butter, kapok wax, kayak oil, carnauba wax, liver oil, candelilla wax, beef tallow, beef leg fat, beef bone fat, and cured beef tallow , Kyounin oil, whale wax, hydrogenated oil, wheat germ oil, sesame oil, rice germ oil, rice bran oil, sugar cane wax, sasanqua oil, safflower oil, shea butter, cinnamon oil, cinnamon oil, jojo barr, shellac wax, turtle oil, Soybean oil, tea seed oil, camellia oil, evening primrose oil, corn oil, lard, rapeseed oil, Japanese kiri oil, nukarou, germ oil, horse fat, persic oil, palm oil, palm kernel oil, castor oil, hydrogenated castor oil , Castor oil fatty acid methyl ester, sunflower oil, grape oil, bayberry wax, jojoba oil, macadamia nut oil, beeswax, min Oil, cottonseed oil, cotton wax, molasses, mollusc kernel oil, montan wax, palm oil, hardened palm oil, tricoconut oil fatty acid glyceride, sheep oil, peanut oil, lanolin, liquid lanolin, reduced lanolin, lanolin alcohol, hard lanolin, lanolin acetate Examples include lanolin fatty acid isopropyl, hexyl laurate, POE lanolin alcohol ether, POE lanolin alcohol acetate, lanolin fatty acid polyethylene glycol, POE hydrogenated lanolin alcohol ether, and egg yolk oil.

  Furthermore, as said oil agent, hydrocarbon oil, a higher fatty acid, a higher alcohol, ester oil, glyceride oil, silicone oil etc. can be used, for example.

  Here, examples of the hydrocarbon oil include ozokerite, squalane, squalene, ceresin, paraffin, paraffin wax, liquid paraffin, pristane, polyisobutylene, microcrystalline wax, petrolatum and the like.

  Examples of the higher fatty acid include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, undecylenic acid, oleic acid, linoleic acid, linolenic acid, arachidonic acid, eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA). ), Isostearic acid, 12-hydroxystearic acid and the like.

  Examples of the higher alcohol include lauryl alcohol, myristyl alcohol, palmityl alcohol, stearyl alcohol, behenyl alcohol, hexadecyl alcohol, oleyl alcohol, isostearyl alcohol, hexyl decanol, octyldodecanol, cetostearyl alcohol, 2-decyl. Examples thereof include tetradecinol, cholesterol, phytosterol, POE cholesterol ether, monostearyl glycerin ether (batyl alcohol), monooleyl glyceryl ether (ceralkyl alcohol) and the like.

  Examples of the ester oil include diisobutyl adipate, 2-hexyldecyl adipate, di-2-heptylundecyl adipate, N-alkyl glycol monoisostearate, isocetyl isostearate, isononyl isononanoate, and triisostearate tris. Methylolpropane, ethylene glycol di-2-ethylhexanoate, cetyl 2-ethylhexanoate, trimethylolpropane tri-2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, cetyl octanoate, octyldodecyl gum ester, Oleyl oleate, octyldodecyl oleate, decyl oleate, neopentyl glycol dicaprate, triethyl citrate, 2-ethylhexyl succinate, amyl acetate, ethyl acetate, acetic acid Chill, isocetyl stearate, butyl stearate, diisopropyl sebacate, di-2-ethylhexyl sebacate, cetyl lactate, myristyl lactate, isopropyl palmitate, 2-ethylhexyl palmitate, 2-hexyldecyl palmitate, 2-heptyl palmitate Undecyl, cholesteryl 12-hydroxystearyl, dipentaerythritol fatty acid ester, isopropyl myristate, octyldodecyl myristate, 2-hexyldecyl myristate, myristyl myristate, hexyldecyl dimethyloctanoate, ethyl laurate, hexyl laurate, N-lauroyl-L-glutamic acid-2-octyldodecyl ester, diisostearyl malate and the like can be mentioned.

  Examples of the glyceride oil include acetoglyceryl, glyceryl triisooctanoate, glyceryl triisostearate, glyceryl tri (capryl / capric acid), glyceryl triisopalmitate, glyceryl monostearate, and glyceryl di-2-heptylundecanoate. Glyceryl trimyristate, and diglyceryl myristate isostearate.

  Examples of the silicone oil include dimethylpolysiloxane, biphenylsiloxane, decamethylcyclopentasiloxane, methyltrimethicone, alkyl-modified silicone, and fluorosilicone.

  By the way, the above-mentioned pigment-encapsulated cellulose powder has a characteristic that when it gets wet with an oil agent or sebum, excessive light scattering on the powder surface is suppressed, and a more effective optical effect can be obtained. For this reason, in the cosmetic of this invention, it is preferable to mix | blend the said pigment inclusion | inner_cover cellulose powder and 1 or more types of the oil agent of the enumeration mentioned above in combination. It should be noted that the oils listed above can also be selected and blended in the resin and paint of the present invention described later, provided that the stability can be maintained over a long period of time.

  In the cosmetic of the present invention, the same pigments as those listed above can be used. Moreover, it is preferable that the above-mentioned various surface treatments are applied to the pigment used in the cosmetic of the present invention.

  In the cosmetic of the present invention, it is preferable to use the pigment-encapsulated cellulose powder in combination with a silicone elastomer. Examples of the silicone elastomer used herein include organosiloxane elastomers made of spherical powder having a primary particle diameter of 1 to 100 μm (for example, Toray Fill E series manufactured by Toray Dow Corning Silicone), amorphous silicone paste ( For example, KSG series manufactured by Shin-Etsu Chemical Co., Ltd. may be mentioned. Here, by using the pigment-encapsulated cellulose powder in a mass ratio of 1: 9 to 9: 1 with the silicone elastomer, a cosmetic coating film that more effectively conceals wrinkles or brightens the skin is formed. It is possible to do.

  By the way, although the pigment-encapsulating cellulose powder is excellent in the effect of scattering light, the appearance becomes slightly matte as the light is scattered. For this reason, in the cosmetics of this invention, it becomes possible to give a pseudo luster to skin by using in combination with mica titanium further.

  Preferred uses of the cosmetics of the present invention include skin care products, hair products, antiperspirant products, makeup products, UV protection products, perfume solvents and the like. More specific examples include makeup cosmetics such as foundation, white powder, eye shadow, eyeliner, eyebrow, teak, nail color, lip balm, lipstick, mascara, emulsion, cream, lotion, sunscreen agent, suntan agent , Basic cosmetics such as packs, cleansings, facial cleansers, hair colors, setting agents, body powders, deodorants, hair removal agents, soaps, bathing agents, hand soaps, perfumes and the like. The form of the product is not particularly limited, and may be any of liquid, emulsion, cream, solid, paste, gel, powder, multilayer, mousse, and spray.

  The pigment-encapsulated cellulose powder can be blended in, for example, a resin or a paint in addition to the cosmetic. By blending the pigment-encapsulating cellulose powder into a resin or paint, it is possible to give a sense of optical depth to the resin or paint film and to form a more natural appearance. That is, it is possible to obtain a coating film having a more beautiful appearance and a more natural impression. Further, such a resin or paint has an effect that the surface feel becomes smoother and softer.

  Here, the pigment-encapsulating cellulose powder is preferably blended in the range of 0.1 to 50% by mass, more preferably in the range of 1 to 35% by mass with respect to the mass of the resin or paint. If it is this range, an optical effect and a soft touch can be acquired, ensuring sufficient intensity | strength of resin or a coating material.

  The pigment-encapsulated cellulose powder can be blended in clothing, fibers, nonwoven fabrics, inks, etc., in addition to cosmetics, resins, and paints.

  Next, specific examples of the pigment-encapsulating cellulose powder according to the present invention and cosmetics, resins, and paints containing the same will be described. In addition, this invention is not limited to the Example described below.

(Evaluation method of optical characteristics and feel)
First, an evaluation method for various characteristics applied in the present embodiment will be described. In the manufacturing example 1 described later, the angle dependency of the whiteness is measured by using a variable angle spectrocolorimeter manufactured by Minolta Co., Ltd., and the reflected light of 10 degrees, 45 degrees, and 75 degrees with respect to the incident light of 90 degrees. L value was measured. On the other hand, in Example 1 and Comparative Example, which will be described later, with regard to the appearance and tactile sensation of the product, 10 expert panelists scored the inferior as 0 points and the superior as 10 points. The total score was taken as the evaluation result. Therefore, the higher the score, the better the evaluation.

(Production Example 1: Production Example of Titanium Oxide Encapsulated Cellulose Powder)
9 parts by mass of pigment-grade titanium oxide (alumina-treated titanium oxide, average primary particle size 0.3 μm) and 200 parts by mass of viscose (cellulose concentration 10% by mass, gamma value 50, alkali concentration 5% by mass) were rotated with a homomixer. The mixture was mixed at 3000 rpm to obtain titanium oxide-containing viscose. 120 parts by weight of this titanium oxide-containing viscose, 480 parts by weight of a 10% by weight aqueous solution of sodium polyacrylate (degree of polymerization 200,000), and 10 parts by weight of calcium carbonate were mixed at room temperature for 10 minutes at a rotation speed of 400 rpm. Thereafter, the temperature was raised to 80 ° C. over 10 minutes, and further mixed at 80 ° C. for 30 minutes to obtain solidified particles. The coagulated particles are filtered off with a glass filter, neutralized with 0.5% by mass hydrochloric acid, further washed with excess water and methanol, and then dried under reduced pressure to obtain a titanium oxide-containing cellulose powder (containing titanium oxide). Amount 31% by mass) was obtained. As a result of analyzing the particles of the obtained titanium oxide-encapsulating cellulose powder using an electron microscope, as shown in FIG. 1 and FIG. 2, the shape is spherical, and the titanium oxide is not only inside the cellulose powder but also It can be seen that the surface is also included in a dispersed state. Moreover, when it analyzes from an electron microscope observation image, it turns out that an average primary particle diameter is 10 micrometers, and the particle diameter of all the particles exists in the range of 3-24 micrometers. Furthermore, this sample (titanium oxide-encapsulating cellulose powder) was applied to black paper, and the whiteness of reflection angles of 10 degrees, 45 degrees, and 75 degrees at an incident angle of 90 degrees was measured using a variable angle spectrocolorimeter. When the color was measured using the L value, the values of 56, 62, and 75 were obtained, respectively, and it was found that the whiteness increased as the reflection angle increased.

(Production Example 2: Production Example of Fine Particles Titanium Oxide Encapsulated Cellulose Powder)
Instead of pigment-grade titanium oxide in Production Example 1, silica alumina-treated fine particle titanium oxide having an average primary particle diameter of 35 nm 4 parts by mass and viscose (cellulose concentration 10% by mass, gamma value 50, alkali concentration 5% by mass) 200 parts by mass In the same manner as in Production Example 1, a finely divided titanium oxide-encapsulating cellulose powder (fine titanium oxide content: 50 mass%) was obtained. When the particles of the obtained fine particle titanium oxide-encapsulating cellulose powder were observed with an electron microscope, it was found that the average primary particle size was 12 μm and the total particle size was in the range of 3 to 30 μm.

(Production comparison example)
In Production Example 1, spherical cellulose powder was obtained using the same production method without blending a pigment. This spherical cellulose powder had an average primary particle size of 13 μm and a particle size of all particles in the range of 3 to 30 μm.

(Example 1: Cosmetics)
Based on the formulation shown in Table 1, a foundation was prepared by a manufacturing method described later. Here, as the silicone treatment, a 3% by mass methylhydrogenpolysiloxane heat-treated pigment was used, and as the silicone elastomer, a pulverized Toray Fill E-508 manufactured by Toray Dow Corning Silicone Co., Ltd. was used. 5% by mass N-lauroyl-L-lysine (Ajinomoto AMIHOPE LL) -treated pigment was used. In addition, the unit of the compounding amount in Table 1 is part by mass (the same applies to Tables 3 and 4 below).

(Manufacturing method of cosmetics of Example 1)
Of the various components shown in Table 1, the powder components are mixed using a mixer, and the oil component dissolved by heating is gradually added to the mixture and mixed uniformly. The target product (foundation) was obtained by molding.

(Comparative example: Cosmetics)
The spherical cellulose powder of Production Comparative Example was blended in place of the titanium oxide-encapsulated cellulose powder (Production Example 1) and the fine-particle titanium oxide-encapsulated cellulose powder (Production Example 2) in Table 1, and the silicone-treated pigment grade titanium oxide The target product (foundation) was obtained in the same manner as in Example 1 except that the amount was increased to 11 parts by mass.

  The evaluation results of Example 1 and the comparative example are shown in Table 2. From the results shown in Table 2, it can be seen that the cosmetic material of Example 1 is less noticeable of the wrinkles, has a three-dimensional effect, and is excellent in the coating feeling as compared with the cosmetic material of the comparative example.

(Example 2: Resin film)
A resin film was prepared by the manufacturing method described later based on the formulation shown in Table 3.

(Method for producing resin film of Example 2)
Various components shown in Table 3 were mixed and melted, and a sheet was prepared using a heat roller. The sheet thus obtained was transparent and excellent in light diffusibility. Also, the touch was soft and there was a sense of quality.

(Example 3: Paint)
A coating material was prepared by the manufacturing method described later based on the formulation shown in Table 4.

(Method for producing paint of Example 3)
Various components shown in Table 4 were mixed and dissolved to prepare a paint. When the coating material obtained in this way was applied to a glass plate, the transparency was ensured while being transparent, and an optically deep appearance was exhibited.

  From the above, according to the pigment-encapsulated cellulose powder of the present invention, since the pigment is encapsulated in a dispersed state on the surface and inside of the cellulose powder, it has a light scattering property and can exert a concealing effect, A high-quality feeling can be created by giving transparency and soft touch to the coating film. In addition, according to the cosmetic containing this pigment-encapsulating cellulose powder, the effect of making it difficult to see the small wrinkles on the skin and making the vertical lines of the lips less noticeable by gradually diffusing the incident light. In addition, the effect of making the cosmetic look natural can be obtained by scattering light. In addition, according to the resin or paint in which the pigment-encapsulating cellulose powder is blended, it is possible to obtain an effect that the coating film has a transparent feeling, the touch when the coating film is touched becomes soft, and a high-class feeling can be obtained. In addition, since light can be scattered not uniformly but anisotropically, it is possible to obtain an optically deep appearance in which the color appears to change depending on how light enters.

Scanning electron micrograph of the titanium oxide-encapsulating cellulose powder of Production Example 1 Transmission electron micrograph of titanium oxide-encapsulating cellulose powder of Production Example 1

Claims (9)

  A pigment-encapsulated cellulose powder comprising a cellulose powder encapsulated in a range of 1 to 200% by mass of its own weight on and inside the cellulose powder.   The pigment-encapsulated cellulose powder according to claim 1, wherein the pigment is one or more pigments selected from the group consisting of titanium oxide, surface-treated zinc oxide, cerium oxide, silica, and zirconia.   3. The pigment-encapsulated cellulose powder according to claim 1 or 2, wherein the whiteness when applied to black paper increases as the reflection angle increases.   The pigment-encapsulated cellulose powder according to any one of claims 1 to 3, wherein the primary particle diameter of 90% or more of all particles is in the range of 3 to 30 µm and the average primary particle diameter is in the range of 7 to 15 µm.   A cosmetic comprising the pigment-encapsulated cellulose powder according to any one of claims 1 to 4.   The cosmetic according to claim 5, wherein a silicone elastomer is blended.   The cosmetic according to claim 5 or 6, wherein titanium mica is blended.   A resin comprising the pigment-encapsulated cellulose powder according to claim 1.   A paint comprising the pigment-encapsulated cellulose powder according to claim 1.