JPH07277923A - Oily cosmetic - Google Patents

Abstract

PURPOSE:To obtain an oily cosmetic, capable of improving the adhesion unique thereto and reducing the stickiness and excellent in persistence of makeup effects. CONSTITUTION:This oily cosmetic is obtained by blending (A) a polyether- modified silicone which is a linear copolymer containing a polysiloxane- polyoxyalkylene block expressed by the formula [R1 to R4 are each a 1-32C alkyl; (x) and (y) are each 1-8; (a) and (b) are each an integer providing the polyoxyalkylene with 300-10000 average molecular weight and a number providing 10-90wt.% polyoxyalkylene in the molecule; (m) is an integer providing the polysiloxane block with 400-10000 average molecular weight; (n) is >=4; the linear block copolymer has at least 3000 average molecular weight] as a recurring unit with (B) a liquid polar oil comprising one or more compounds selected from the group of esters of >=18C monohydric alcohols, >=3C monohydric alcohols or cholesterol with >=8C fatty acids and esters of compounds having at least >=2 hydroxyl groups with >=7C fatty acids. The amounts of the blended ingredients are 1.0-50.0wt.% ingredient (A) and 3.0-50.0wt.% ingredients (B).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oily cosmetic which is easy to produce, has improved adhesion characteristic of oily cosmetics, reduces stickiness, and has excellent durability of cosmetic effects.

[0002]

2. Description of the Related Art Generally, oil-based cosmetics have excellent adhesion to the skin and good durability, but they have a strong oily feel when used, and are easy to feel sticky or strange. Therefore, conventionally, silicone oil or liquid paraffin, which is relatively less sticky, is blended to reduce the oily feeling. However, although this method surely reduces stickiness, it also reduces the good adhesiveness, which is the greatest feature of oil-based cosmetics, and is not so preferable, and it is quite difficult to balance the composition. In order to improve this, it is proposed to use a pendant type polyether modified silicone having a polyoxyalkylene block as a side chain and a liquid polar oil (Japanese Patent Application No. 6-4501).
No. 1) has been done.

[0003]

However, even in the above proposal, there is some dissatisfaction in terms of tackiness improvement.
Further, the monohydric alcohol of the liquid polar oil used in combination has 16 or more carbon atoms, but with 16 carbon atoms, some stickiness is felt, and further improvement is desired. Therefore, it is an object of the present invention to provide an improved oil-based cosmetic composition having improved adhesiveness peculiar to the oil-based cosmetic composition, reduced stickiness, and excellent durability of the cosmetic effect.

[0004]

The present inventors have arrived at the present invention as a result of extensive studies to solve the above problems.
That is, an oily cosmetic comprising at least one of polyether modified silicone which is a linear block copolymer represented by the general formula 2 and polar oil which has a liquid appearance at 20 ° C. Is.

[0005]

[Chemical 2]

(Wherein R _{1 to} R ₄ are the same or different alkyl groups having 1 to 32 carbon atoms, x and y are integers of 1 to 8,
a and b are polyoxyalkylene having an average molecular weight of 300 to
It is an integer of 10,000 and represents the number of polyoxyalkylene groups in the molecule of 10 to 90% by weight, and m represents an average molecular weight of the polysiloxane block of 400 to 10,000.
An integer of 0, n is an integer of at least 4, and the linear block copolymer has an average molecular weight of at least 3000. )

Examples of the alkyl group represented by the general formula 2 of the present invention include a methyl group, an ethyl group, a propyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group and a decyl group, which reduce stickiness. From the above, a methyl group is preferable.

The polyether-modified silicone, which is a linear block copolymer represented by the general formula 2 of the present invention, is a known substance (Japanese Patent Laid-Open No. 234307/1992), and in this publication, a linear chain is used. Although a skin cosmetic containing a block-shaped block copolymer has been proposed, it is unsatisfactory as an oily cosmetic in terms of stickiness and persistence of the cosmetic effect, and the present inventors have made diligent studies on its combination. Completed the invention. That is, by blending a polyether-modified silicone, which is a linear block copolymer, and a specific liquid polar oil, synergistically improved the adhesiveness peculiar to oily cosmetics and synergistically the stickiness. They have found a reduced and excellent oily cosmetic. The amount of the polyether-modified silicone compound that is the linear block copolymer is improved by improving the adhesiveness peculiar to oily cosmetics, reducing stickiness, and examining the range of excellent durability of the cosmetic effect. As a standard, 1.0 to 50.0% by weight is preferable.

The liquid polar oil of the present invention has a liquid appearance at 20 ° C. and is a compound containing a hydroxyl group and / or an ester bond. The suitable amount of this polar oil is
For the same reason as above, 3.0
~ 50.0% by weight is preferred.

1 having 18 or more carbon atoms used in the present invention
The polyhydric alcohol is a known substance, for example, 2-octyldodecanol, isostearyl alcohol, oleyl alcohol, 2-hexyldecanol, jojoba alcohol and the like, but they are excellent in the effects of adhesion, stickiness and durability. And preferably 2-octyldodecanol or isostearyl alcohol.

Another liquid polar oil used in the present invention is a monohydric alcohol having 3 or more carbon atoms, or cholesterol and a fatty acid having 8 or more carbon atoms, adipic acid, oxystearic acid, succinic acid or malic acid. These are well-known substances such as diisostearyl adipate, dioctyl adipate, diisopropyl isostearate, cholesteryl isostearate, isononyl isononanoate, octyldodecyl erucate, octyl oxystearate, cetyl octanoate, olein. Octyldodecyl acid, oleyl oleate, dioctyl succinate, isocetyl stearate, isopropyl palmitate, octyldodecyl myristate, myristyl myristate, decyl oleate, octyldodecyl ricinoleate, etc. Ri, from the viewpoint of excellent effects such as the adhesiveness, tackiness, durability, preferably dioctyl adipate, isononyl isononanoate, isostearic acid cholesteryl or ricinoleic acid octyldodecyl. More preferable examples include dioctyl adipate, isononyl isononanoate, and octyldodecyl ricinoleate.

Further, the liquid polar oil used in the present invention has ethylene glycol, propylene glycol, neopentyl glycol, glycerin, diglycerin, trimethylolpropane, pentaerythritol and carbon number having at least two hydroxyl groups. Esters with 7 or more fatty acids are known substances such as ethylene glycol octanoate, ethylene glycol palmitate, propylene glycol isostearate, propylene glycol ricinoleate, propylene glycol di (capryl / capric acid), dicaprylic acid. Propylene glycol, propylene glycol dimyristate, propylene glycol dicaprate, neopentyl glycol dioctanoate, neopentyl glycol dicaprate, triiso Tearic acid glyceride, diisostearic acid glyceride, trioctanoic acid glyceride, tri (caprylic / capric acid) glyceride, ricinoleic acid glyceride, isostearic acid diglyceride, diisostearic acid diglyceride, triisostearic acid diglyceride, trioctyric acid trimethylolpropane, triisostearic acid trimethylolpropane , Tetraoctanoic acid pentaerythritol and the like, and from the viewpoint of excellent effects such as the above-mentioned adhesion, stickiness and durability, propylene glycol isostearate, propylene glycol dicaprylate, ricinoleic acid glyceride or tri (capryl-caprin) is preferable. Acid) glyceride.

In the oily cosmetic of the present invention, solid oily raw materials such as paraffin and ceresin, vaseline, pasty oily raw materials such as heavy liquid isoparaffin, and liquid are used in addition to the above-mentioned essential components within the range not impairing the object of the present invention. Liquid oily materials such as paraffin and squalane, antioxidants, preservatives, fragrances and talc, mica, titanium oxide, iron oxide, tar pigments,
Powder pigments such as silk powder and nylon powder can be blended.

The oily cosmetic composition of the present invention can be prepared according to a conventional method, for example, lipstick, foundation, eye shadow, blusher,
It can be manufactured and used in a dosage form such as lip balm.

[0015]

EXAMPLES The present invention will be further described below with reference to examples, but the present invention is not limited thereto.

Examples 1 and 2, Comparative Example 1 (lipstick) Table 1 shows an example in which the compound according to the present invention was blended and a comparative example in which it was not blended.

[0017]

[Table 1]

Compound 1 of the present invention R ₁ , R ₂ , R ₃ and R ₄ are CH ₃ , x and y are 4, and a is 1
8, b is 33, n is 16.1, m is 40, and the molecular weight is 52,000.

Note 1: Example 1 of Japanese Patent Application No. 6-45011.

The lipsticks of Examples 1 and 2 and Comparative Example 1 were prepared by a usual method. About these, test panel 2
The sample of Example and the sample of Comparative Example were evenly applied to the left and right of the lips by 0 persons, and the stickiness was compared, and after 4 hours, the durability of the cosmetic effect was evaluated. None of the panelists complained of stickiness at the time of application in the sample of the example, and the durability of the cosmetic effect after 4 hours was superior to that of the sample of the comparative example.

Examples 3 to 4 and Comparative Example 2 (foundation)

Table 2 shows examples in which the compound according to the present invention was blended and non-blended comparative examples.

[0023]

[Table 2]

Compound 2 of the present invention R ₁ , R ₂ , R ₃ and R ₄ are CH ₃ , x and y are 4 and a is 2
0, b is 29, n is 26.3, m is 3, and the molecular weight is 48,000.

Note 2: Example 2 of Japanese Patent Application No. 6-45011.

The foundations of Examples 3-4 and Comparative Example 2 were prepared by a conventional method. With respect to these, 20 test panelists applied the sample of the example and the sample of the comparative example evenly on the right and left sides of the face, compared the stickiness, and evaluated the durability of the cosmetic effect after 3 hours. None of the panelists complained of stickiness during application in the example sample, and the durability of the cosmetic effect after 3 hours was also superior to that of the comparative sample.

[0027]

EFFECTS OF THE INVENTION The oil-based cosmetic composition of the present invention improves the adhesion characteristic of the oil-based cosmetic composition, reduces stickiness, and is excellent in the durability of the cosmetic effect.

Claims (1)

[Claims] 1. A general formula 1 (However, R _{1 to} R ₄ are the same or different and have _{1 to} 32 carbon atoms.
Is an integer of 1 to 8, a and b are integers having an average molecular weight of polyoxyalkylene of 300 to 10,000, and the number of polyoxyalkylene groups in the molecule is 10
To 90% by weight, m is an integer having an average molecular weight of the polysiloxane block of 400 to 10,000,
n is 4 or greater, and the linear block copolymer has an average molecular weight of at least 3000. ), A polyether-modified silicone that is a linear block copolymer having a repeating unit of polysiloxane / polyoxyalkylene block, and a monohydric alcohol having 18 or more carbon atoms, or a monohydric alcohol having 3 or more carbon atoms. Blending a liquid polar oil comprising one or more compounds selected from the group consisting of an ester of cholesterol and a fatty acid having 8 or more carbon atoms, a compound having at least two hydroxyl groups and an ester of fatty acid having 7 or more carbon atoms. An oily cosmetic characterized by: