JP2519469B2 - Stick cosmetics - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a novel cosmetic, which is intended to have excellent shape retention, good releasability from a container, and stability over time. , To provide stick cosmetics with a good feeling of use.

[Prior Art] As a solidifying agent which has been conventionally used in stick cosmetics, animal waxes such as beeswax, vegetable waxes such as carnauba wax and candelilla wax, mineral waxes such as ceresin and microcrystalline wax. The shape retention of stick cosmetics has been carried out by using these.

[Problems to be Solved by the Invention] The above-mentioned conventionally known animal / vegetable waxes and mineral waxes are not sufficiently satisfactory in obtaining the shape-retaining property because of their poor solidifying power. Further, when used in a large amount, there is a drawback in that it is difficult to be fed out after being solidified after being solidified, so that the so-called releasability is also bad. Further, in the conventional case, when a stick cosmetic is prepared, there are problems such as a decrease in surface gloss and the occurrence of perspiration and powder generation over time, which is not satisfactory in reality. For these reasons, it was quite difficult to produce a product with good stability without the above problems.

[Means for Solving Problems] In view of the above points, the present inventors obtain a stick cosmetic that is excellent in shape retention and releasability, and is satisfactory in terms of stability over time and usability. As a result of intensive studies, it was found that an ethylene-propylene copolymer having a melting point within a specific range is extremely effective as a solidifying agent, and that a product satisfying the above conditions can be obtained by blending this, and the present invention has been completed. It was.

That is, the present invention provides an ethylene propylene copolymer having a melting point of 80 to 105 ° C. and a molecular weight of 300 to 800 in an amount of 3 to 50.
The present invention provides a stick cosmetic characterized by being blended in a weight percentage.

The ethylene-propylene copolymer used essentially in the present invention has a melting point of 80 to 105 ° C. as described above, and any one having a melting point within the above range can be preferably used. When the melting point is less than 80 ° C, the solidifying power is poor, which is not preferable for the purpose of maintaining the shape of the product.
If the temperature exceeds ℃, it will be difficult to use as a solidifying agent because it must be actually used at high temperature. The ethylene propylene copolymer contained in the above range has a molecular weight of about 30.
It is from 0 to 800.

The content of the ethylene-propylene copolymer in the present invention is preferably 3 to 50% by weight, particularly preferably 3 to 20%.
% By weight. When the amount is less than 3% by weight, sufficient solidifying force cannot be obtained, and when the amount is more than 50% by weight, the hardness is remarkably increased and the usability is deteriorated. That's enough.

The above ethylene-propylene copolymer can be used as a solid oil agent in ordinary cosmetics, but particularly when used in stick cosmetics, a remarkable effect can be obtained.

The stick cosmetic of the present invention has a stick-like form, and examples thereof include lipstick, lip gloss, foundation, blusher, eye shadow, eyeliner, and eyebrow.

And the stick cosmetics of the present invention, in addition to the above essential components, oils, powders, which are generally used in stick cosmetics,
It is prepared by appropriately blending a dye, a polymer, a fragrance, a surfactant, an antioxidant, an ultraviolet absorber, a preservative, a beauty agent and the like, if necessary.

EXAMPLES Next, the present invention will be further described with reference to examples.
These do not limit the invention in any way.

Examples [1] to [3] First, the stick-shaped lipsticks of Examples [1] to [3] and Comparative Examples [1] to [3] whose formulations are shown in Table 1 were prepared, and their breaking strength and releasability were evaluated. The effects of the present invention were examined with respect to stability over time, surface gloss as appearance, and feeling of use. The results are shown in Table 1. In the table, the blending amount is shown by weight%.

(Production Method) A (1) to (5) are heated and dissolved.

Add (6) to B A and mix evenly.

C After degassing, pour directly into a feeding container, cool and mold.

(Evaluation method) Fracture strength: Rheometer NRM-2002J (Fudo Kogyo Co., Ltd.)
Manufactured).

Releasability: The degree of peeling from the container was judged with the naked eye.

◎: Very good ○: Good ×: Bad Stability over time …… 6 at 0 ℃, room temperature, and 50 ℃
After storing for one month, the presence or absence of appearance change such as deformation, sweating, and dusting was visually evaluated.

⊚: Very good ∘: Good ×: Poor surface gloss …… The degree of gloss was visually judged.

◎: Very good ○: Good ×: Poor Feeling …… A female panel consisting of 20 people evaluated the non-stickiness and smoothness during application by a usage test.

The evaluation is performed by the number of people who are judged to be non-sticky (can be applied smoothly). When 15 or more: ◎ For 10 to 14: ○ For 5 to 9: △ For 0 to 4: × Expressed as

As is clear from the results in Table 1, the stick-shaped lipsticks of Examples [1] to [3] according to the present invention have high folding strength and thus excellent shape retention, and also have a good degree of peeling from the container after solidification. Also, in terms of stability over time, neither deformation nor sweating at high temperature nor dusting at low temperature was observed, which was satisfactory. Moreover, the surface gloss was not deteriorated, and there was no stickiness in terms of usability during application, and the product had a smooth usability. On the other hand, when only candeli wax was used as the solidifying agent (Comparative Example [1]-
In the case of [3]), if the blending amount is too small, the solidifying force is weak, so that the product is easy to break and has a sticky feeling, so that the feeling of use is inferior. Although it decreased, the releasability from the container deteriorated, and the surface gloss also decreased. Moreover, it was also lacking in temporal stability.

That is, the lipsticks of Examples [1] to [3] according to the present invention were excellent in bending strength and releasability, and were excellent in stability over time, surface gloss and feeling of use, which were very satisfactory. .

Example [4] Stick-shaped eye shadow (formulation) (% by weight) (1) Ethylene propylene copolymer (melting point 93 ° C) 10.0 (2) Liquid paraffin 38.8 (3) Vaseline 5.0 (4) Sorbitan sesquioleate 1.0 (5) Mica 10.0 (6) Titanium mica 20.0 (7) Color pigment 15.0 (8) Perfume 0.2 (Production method) A components (1) to (4) are heated and dissolved.

(5) to (8) are added to BA and mixed with stirring.

C Degas and pour directly into a feeding container, cool and mold.

Example [5] Stick-shaped lipstick (formulation) (% by weight) (1) Ethylene propylene copolymer (melting point 93 ° C.) 15.0 (2) Vaseline 10.0 (3) Squalane 5.0 (4) Diglycerin triisostearate 65.6 (5) Preservative 0.1 (6) Antioxidant 0.1 (7) Perfume 0.2 (8) Titanium oxide 2.0 (9) Color pigment 2.0 (Production method) A (1) to (6) are heated and dissolved.

(7) to (9) are added to BA and mixed uniformly.

C After degassing, pour into a mold and quench to solidify.

Remove D C from the mold and load into the container.

The stick cosmetics of Examples [4] and [5] obtained as described above are both excellent in shape retention and releasability from the feeding container or the mold, and have a good feeling in use. It was

[Effects of the Invention] As described in detail above, the present invention can provide a novel stick cosmetic composition in which its addition effect is sufficiently exhibited by incorporating an ethylene-propylene copolymer having a melting point in a specific range as a solidifying agent. It is a thing.

That is, according to the present invention, it has an unprecedented shape retention property, good releasability from the container after solidification, and stability over time, according to the invention.
It is now possible to provide extremely useful stick cosmetics that are sufficiently satisfactory in terms of appearance and feel.

Claims (1)

(57) [Claims] 1. A melting point of 80 to 105 ° C. and a molecular weight of 300 to 80.
A stick cosmetic, wherein 3 to 50% by weight of ethylene propylene copolymer of 0 is blended.