JPS6212710A - Oily solid cosmetic - Google Patents

Abstract

PURPOSE:An oily solid cosmetic of stick type, pencil type, etc., having improved water resistance, oil resistance, friction resistance, slightly causing color migration and color release, containing an oil-soluble high polymer substance, a volatile oil agent and solid fats and oils as essential components. CONSTITUTION:An oily solid cosmetic comprising (A) an oil-soluble high polymer substance, (B) 5-80wt% volatile oil agent (e.g., dimethylpolysiloxane) having <=280 deg.C boiling point and (C) 5-60wt% solid fats and oils (e.g., wax) having <=40 penetration degree (JISK-2530) (25 deg.C, 100g, 5sec). The component A is soluble or dispersible in the component B but immiscible with the component C and preferably a polymer or copolymer (e.g., polystearyl acrylate) of a vinyl monomer containing >=8C long-chain alkyl on the side chain, rubber-like polymer (e.g., polyisoprene), etc. The amount of the component A is 0.1-50wt% based on the component B. The cosmetic has >=40g breaking strength in a cylinder with 12mm diameter at 25 deg.C.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to oil-based solid cosmetics that are water resistant, oil resistant, and resistant to friction. This invention relates to oil-based solid cosmetics such as stick-type and pencil-type lipsticks, eyeliners, etc., which are obtained by blending a polymeric substance, a volatile oil with a boiling point of 280° C. or less, and a solid oil.

[Conventional technology]

Conventionally, volatile oils such as linear dimethylpolysiloxane, cyclic dimethylpolysiloxane, and low-boiling hydrocarbons are replaced with part or all of non-volatile liquid oils, and after applying cosmetics to the skin, the liquid ingredients are added. Cosmetics, especially oil-based stick-type cosmetics, have been commercially available that try to prevent color transfer from the skin and mucous membranes by volatilizing the color from the application body.

Compared to cosmetics that do not contain volatile oils, such oil-based stick-type cosmetics, for example, are difficult to adhere to when an adherend such as paper or cloth is pressed onto the skin. It can reduce color transfer to the body. However, if the adherend is moved sideways while being pressed against the adherend, the coating material easily transfers to the adherend, and the abrasion resistance is poor, and no effect of preventing color fading can be expected. Furthermore, if a non-volatile liquid oil is applied on top of this coating, the coating may transfer to the adherend again, and if it is applied to the lips, the color may begin to transfer due to the fats and oils from food during meals, resulting in poor oil resistance. is not enough. Regarding the range of use, in the conventional method, solid content (wax, powder, etc.) must be added in a larger amount than usual oil-based stick type cosmetics in order to improve the effect of preventing color transfer. Therefore, it has the disadvantage that it does not spread well during application, and after application, it has a strong dry feeling after the volatile oil has evaporated.

[Problem that the invention seeks to solve]

The present inventors have discovered that the coating material spreads well during application, does not give a dry feeling after application, does not easily transfer to the adherend by shifting the adherend after application, and is non-volatile after application. We have been developing oil-based solid cosmetics such as stick-type and pencil-type cosmetics to prevent color transfer to adherends even when liquid oil is applied, and to prevent makeup from fading.

Under these circumstances, the present inventors conducted extensive research and found that when an oil-based solid cosmetic containing an oil-soluble polymer and a volatile oil is applied to the skin or mucous membranes, the volatile oil evaporates from the applied body. At a temperature around room temperature, the interaction between the oil agent and the polymer substance that is difficult to dissolve in the oil agent forms a mixed coating film of solid oil and polymer material, which is then pressed onto an adherend such as paper or cloth from above. It was discovered that the color does not transfer easily not only when used alone, but also when the product is moved laterally or reapplied with liquid oil, and this effect eliminates the need to add excessive amounts of solid components such as powder and wax, improving the usability. The invention has been completed.

[Means for solving problems]

That is, the present invention provides an oil-soluble polymer substance, a volatile oil having a boiling point of 280°C or less, and a penetration rate (JIS K-2530) (
(25° C., 100 g, 5 seconds) 40 or less solid oil and fat as an essential component.

The relationship between the oil-soluble polymer substance, volatile oil agent, and solid oil used in the present invention is that the oil-soluble polymer substance is dissolved or dispersed in the volatile oil agent, but is not compatible with the solid oil agent, and the solid oil is volatile. It has a relationship that it does not dissolve in oils at temperatures below 40°C.

The volatile oil used in the present invention has a boiling point of 280°C.
For example, the viscosity is 0.5 to 10 cSt (25
Carbonization of straight chain dimethylpolysiloxane (3 to 6-membered ring), straight chain or branched chain (saturated or unsaturated) with chain length of 3 to 16 Examples include hydrogen. These may be used alone or in combination of two or more.

Penetration used in the present invention (JIS K-2530)
(25'C, 100g, 5 seconds) As solid fats and oils of 40°C or less, those conventionally used in cosmetics can be used, such as hydrocarbons with a melting point of 40°C or higher, synthetic esters of alcohol and fatty acids, etc. waxes, natural waxes, higher alcohols, higher fatty acids, etc.

These may be used alone or in combination of two or more. Especially the penetration (JIS K-2530) (25℃, IQOg, 5
sec) is preferably 0.5 to 20.

Furthermore, the oil-soluble polymer substances used in the present invention include:
Those that are soluble or dispersed in volatile oils and are incompatible with solid fats and oils can be used, and preferred examples include the following.

Firstly, there are polymers or copolymers of nyl monomers having a long chain alkyl group of C or more in the side chain. for example,
Polymers or copolymers of long-chain alkyl alcohols such as (meth)acrylic esters, maleic esters, fumaric esters, vinyl ethers, higher fatty acid vinyl esters, and α-olefins are preferably used, and the long-chain alkyl group is C , to C2□ are particularly preferred. Specifically, polystearyl acrylate, polybehenyl acrylate, polystearyl methacrylate, polybehenyl methacrylate, polystearyl vinyl ether, polyvinyl stearate, CIz-α-olefin/distearyl maleate copolymer, CIz-α-olefin/
Examples include distearyl fumarate copolymer.

In particular, the molecular weight is s, ooo to 2.000. OOO is preferred.

Second, polyisoprene 1. ethylene propylene rubber,
Examples include rubbery polymers such as polybutadiene and ethylene/vinyl acetate copolymers.

Furthermore, alkyl (meth) having an alkyl group of 08 or more
Copolymers of acrylates and (meth)acrylic acid esters bonded with fluorinated alkyl groups can also be used, examples of which include the following: 0 For example, alkyl (meth)acrylates having an alkyl group of C or more Examples include esters of alcohols such as octyl alcohol, decyl alcohol, lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, and (meth)acrylic acid, and any comonomer that can be copolymerized may be used. A fluorinated alkyl group is attached (
Meth)acrylic acid ester comonomers are particularly preferably used. Examples of the (meth)acrylic acid ester bonded with a fluorinated alkyl group include known compounds having a polyfluoroalkyl group and a perfluoroalkyl group; for example, C11z=CHCOOCzH4CbFt
3, CHz=CHCOOCzHaCsFt1, CHz=
CHCOOCzHaC+oFz+, CHz=CHCO
OCJ4CtJzs 1C)1z=C(CHi)COO
CzHnCbF+z, CHz=C(CHi)COOCJ
tCaF+t, CHz=C(CH:+)COOCJ4C
+oFzt, CHz□C(COO)COOCJ*C+
zFzs, CHz=CHC00Cz114HCh)-r
-1 (1CHz=CHCOOCJ4-0Fz)v-H1
CHt=C(CH:+)COOCzHaHCFz□H5
CIZ=C(CH3)COOCZ■4-(CF2)r-
1 (etc.).

The copolymerization ratio of these long-chain alkyl (meth)acrylates and (meth)acrylic acid esters bonded with fluorinated alkyl groups is determined based on solubility, dispersibility, sticky feeling, etc.
1 to 1:5 (weight ratio) is preferred.

In the present invention, the oil-soluble polymer substances exemplified above may be used alone or in combination of two or more.

In preparing the oil-based solid cosmetic of the present invention, in addition to the above-mentioned essential ingredients, various conventionally used non-volatile oils, surfactants, wetting agents, preservatives, antioxidants, fragrances,
Arbitrary components such as powder can be blended as appropriate.

Examples of non-volatile oils include straight-chain or branched-chain hydrocarbons (which may be saturated or unsaturated), natural and synthetic ester oils of higher alcohols and fatty acids, lecithin, and the like.

Examples of the surfactant include polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, sorbitan fatty acid ester, glycerin fatty acid ester, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitol fatty acid ester, and the like. Wetting agents include sorbitol, glycerin, propylene glycol, 1,3-butylene glycol, maltitol, lactic acid, sodium lactate, polyethylene glycol, and the like. Examples of the preservative include paraoxybenzoic acid alkyl ester, sodium benzoate, potassium sorbate, phenoxyethanol, and the like. Examples of antioxidants include tocopherol, cezamol, and cezamorin. Examples of the powder include titanium oxide, zinc oxide, ultramarine blue, chromium oxide, iron oxide, talc, sericite, mica, kaolin, titanium mica, and organic pigments.

The blending amount of the volatile oil in the oil-based solid cosmetic of the present invention is generally preferably 5 to 80% by weight, more preferably 20 to 60% by weight. If it is more than 80% by weight, solid raw materials may not be formed. If the amount is less than 5% by weight, the volatile oil agent will not be effective.

The amount of solid oil and fat blended in the present invention is generally preferably 5 to 60% by weight, more preferably 15 to 45% by weight. If the amount exceeds 60% by weight, the coating performance will be poor (or
The so-called "stickiness" deteriorates. If the amount is less than 5% by weight, stick shapes, pencil shapes, etc. will not be formed.

The weight ratio of solid oil to volatile oil is preferably 0.1 to 2, more preferably 0.2 to 1.

The blending amount of the oil-soluble polymer substance in the cosmetic of the present invention is as follows:
The amount is preferably 0.1 to 50% by weight, more preferably 1 to 30% by weight based on the volatile oil. If it is less than 0.1% by weight, the abrasion resistance will be weakened, and if it is more than 50% by weight, it will become sticky or uneven during application, which is not preferable.

The cosmetic of the present invention can be prepared by heating and mixing the essential ingredients, such as an oil-soluble polymer substance, a volatile oil agent, and a solid oil, as well as any optional ingredients, using a homomixer, homodisper, three-roller, etc. It is prepared by molding it into a predetermined shape. The cosmetics of the present invention can be in the form of makeup cosmetics such as foundations, lipsticks, eyeliners, eyeshadows, eyebrows, red beanies, and the like.

The breaking strength of the oil-based solid cosmetic obtained in this way is 40 g or more in a cylindrical shape with a diameter of 12 mm+ at 25°C, and it is 150 g to 800 g due to shape retention and feeling of use.
Preferably between.

〔Example〕

Hereinafter, the present invention will be explained in more detail with reference to Examples.

Example 1 Polystearyl methacrylate, polybehenyl methacrylate, polystearyl vinyl ether, polyisoprene, ethylene propylene rubber, or ethylene/vinyl acetate copolymer was used as the oil-soluble polymer, and a low boiling point isoparaffin (IP Solvent 1620.
manufactured by Idemitsu Oil Co., Ltd.) and cyclic dimethylpolysiloxane (Sl
Lipsticks were manufactured using the following manufacturing method using Formulation A shown in Table 1 using 1-244° East Silicone ■, and the color transfer prevention effect was evaluated. Also, instead of the oil-soluble polymer substance, ceresin and titanium mica were blended in excess (Table 1
Comparative products were Formulation B) and one in which liquid paraffin was blended instead of the oil-soluble polymer substance and volatile oil agent (Table 1 Formulation C).

After making a paste using three rolls of 4 parts by weight of IP Truben) 1620, 1 part by weight of Moresin, and 1 part by weight of Red No. 202, the whole paste was heated at 90°C for 30 minutes in an airtight container. After mixing, the mixture was poured into a predetermined mold and cooled at -5°C for 20 minutes.

The evaluation of color transfer from lipstick to human skin is leI+! , apply it until the skin color is no longer visible, leave it for 1 minute, then press it with a tissue paper from above with a certain force, and when you move it sideways with a certain force, the color of the lipstick attached to the tissue paper will change. The concentration was visually evaluated according to the following criteria.

(Evaluation criteria) The color of the tissue paper is set as 0, and the density of the lipstick color that adheres when the lipstick according to prescription C in Table 1 is pressed from above with the tissue paper and when it is moved sideways is 5.
It was evaluated as

Furthermore, apply 1 cj of lipstick to the skin until the skin color is no longer visible, leave it for 1 minute, then add 1 drop of liquid paraffin from above using a capillary and press it with tissue paper. The degree of color transfer was evaluated based on the above criteria.

The formulation of the lipstick is shown in Table 1, and the evaluation results of color transfer to tissue paper are shown in Table 2.

As a result of this test, it is clear that the product of the present invention is resistant to oil and has an excellent color transfer prevention effect.

Example 2 An oil-based stick foundation was manufactured using the following formulation using the same manufacturing method as in Example 1 (however, a cylindrical mold with a diameter of 12 mm was used), and the effect of preventing color transfer was evaluated.

Further, the breakage strength was measured at 25°C using a rheometer manufactured by Fudo Kogyo ■.

[Prescription]

Polystearyl methacrylate 10 parts by weight IP Solvent 1620 16 5H244
30〃 Candelilla Row 7 “Serecin
18〃Serisite
10〃Kaolin
5 〃Red Gara 3
“Yellow iron oxide 0.5〃Fragrance
0.5〃 Total 100〃 The obtained fan, dision ↓ was an oil-based stick type foundation that had very good slippage, did not give a dry feeling after application, and was resistant to color transfer.

Moreover, the breaking strength was 80 g.

Example 3 An oil-based stick eyeliner was produced using the following formulation, and its color transfer prevention effect and breakage strength (25°C) were evaluated.

[Prescription]

Ethylene/propylene rubber 10 parts by weight IP Solvent 1620 15 〃5H244
25 Candelilla wax 7 Microcrystalline wax 18 Solid paraffin
10 Black iron oxide
14.5 〃Fragrance 0.5〃 Total 100〃 The obtained eyeliner is slippery and resistant to sebum and sweat.
It was an oil-based stick eyeliner that was resistant to color transfer. Moreover, the breaking strength was 70 g.

Example 4 Oil-based pencil-type eyebrows were manufactured using the following formulation, and the color transfer prevention effect and breakage strength (25°C) were evaluated.

[Prescription] IP Solvent 1620 15
5H24420 Candelilla wax 12 Microcrystalline wax 18 Solid paraffin
10〃Black iron oxide
10.5 Fragrance 0.5 Total 100 Note) *1: Copolymer of stearyl methacrylate and perfluoroalkyl methacrylate in a weight ratio of 3/1, barfluoroa t+, 4z'/
99 'J Ly -) (!″Lr&:!:
jCHz=C(CHs)-COOCzll*
C5Ftt was used. :■ The obtained eyebrow has good slippery and removes sebum and sweat.
It was an oil-based pencil-type eyebrow wax that was resistant to 1 and resistant to color transfer. Also, the breaking strength is 75
It was g. １□ ■ □ □

Claims (1)

[Claims] 1. Oil-soluble polymer substance, volatile oil having a boiling point of 280°C or less, and penetration (JIS K-2530) (25°C, 10°C)
0 g, 5 seconds) An oil-based solid cosmetic characterized by containing a solid oil or fat of 40 or less as an essential component. 2. The oil-based solid cosmetic according to claim 1, wherein the oil-soluble polymer substance is dissolved or dispersed in a volatile oil agent. 3. The oil-based solid cosmetic according to claim 1, wherein the oil-soluble polymer substance is incompatible with solid fats and oils. 4. The oil-based solid cosmetic according to claim 1, wherein the solid oil does not dissolve in the volatile oil at temperatures below 40°C. 5. The oil-based solid cosmetic according to claim 1, which has a breaking strength of 40 g or more in a cylindrical shape with a diameter of 12 mm and at 25°C. 6. The amount of volatile oil in the entire oil-based solid cosmetic is 5 to 8.
The oil-based solid cosmetic according to claim 1, which contains 0% by weight and 5 to 60% by weight of solid oil and fat. 7. The amount of oil-soluble polymer substance is 0.1 to 0.1 to the volatile oil agent.
The oil-based solid cosmetic according to claim 1, which contains 50% by weight. 8. The oil-based solid cosmetic according to claim 1, wherein the oil-soluble polymer substance is a polymer or copolymer of a vinyl monomer having a long-chain alkyl group of C_8 or more in the side chain. 9. A polymer or copolymer of a vinyl monomer having a long chain alkyl group of C_8 or more in the side chain is a (meth)acrylic ester, vinyl ether, vinyl ester, α-olefin, or α having an alkyl group of C_8 to C_2_2.
- The oil-based solid cosmetic according to claim 8, which is a (co)polymer of olefin and maleic acid or fumaric acid ester. 10. The oil-based solid cosmetic according to claim 1, wherein the oil-soluble polymer substance is a rubbery polymer selected from polyisoprene, ethylene propylene rubber, ethylene vinyl acetate copolymer, and polybutadiene.