JP2023142962A - External composition for skin - Google Patents
External composition for skin Download PDFInfo
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- JP2023142962A JP2023142962A JP2022050116A JP2022050116A JP2023142962A JP 2023142962 A JP2023142962 A JP 2023142962A JP 2022050116 A JP2022050116 A JP 2022050116A JP 2022050116 A JP2022050116 A JP 2022050116A JP 2023142962 A JP2023142962 A JP 2023142962A
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- 239000000203 mixture Substances 0.000 title claims abstract description 58
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 35
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 34
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 33
- 229920002261 Corn starch Polymers 0.000 claims abstract description 29
- 239000008120 corn starch Substances 0.000 claims abstract description 28
- 238000002844 melting Methods 0.000 claims abstract description 7
- 230000008018 melting Effects 0.000 claims abstract description 7
- 229940057995 liquid paraffin Drugs 0.000 claims description 38
- 229940099112 cornstarch Drugs 0.000 claims description 28
- 239000002245 particle Substances 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 abstract description 11
- 229920001296 polysiloxane Polymers 0.000 abstract description 10
- 238000011156 evaluation Methods 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 7
- 239000004264 Petrolatum Substances 0.000 description 6
- 229940066842 petrolatum Drugs 0.000 description 6
- 235000019271 petrolatum Nutrition 0.000 description 6
- 230000001953 sensory effect Effects 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 4
- 229940099259 vaseline Drugs 0.000 description 4
- 238000002156 mixing Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 210000000245 forearm Anatomy 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- -1 alicyclic hydrocarbon Chemical class 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000001183 hydrocarbyl group Chemical group 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229940024463 silicone emollient and protective product Drugs 0.000 description 1
- 230000036620 skin dryness Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- Cosmetics (AREA)
Abstract
Description
本発明は、手指や体幹に塗布して水分の蒸発を抑制して保湿する皮膚外用組成物に関する。 The present invention relates to a composition for external use on the skin that is applied to the fingers and torso to suppress moisture evaporation and moisturize the skin.
従来、皮膚の乾燥を防止するために、指、手、腕、足、脚、体幹などの身体に塗布して保湿する皮膚外用組成物が種々知られている。ところが、一般的に、塗布後にべたつかずにサラサラした触感を付与するものとして、組成物中に環状シリコーンを含有するものがあるが、油と水の両方になじみにくいために洗い流しにくく、また昨今シリコーン系化合物を含有しないノンシリコーンの商品が消費者に選考されやすいためシリコーン系化合物を配合しにくかった。 Conventionally, in order to prevent skin dryness, various skin external compositions have been known that are applied to the body, such as fingers, hands, arms, feet, legs, and trunk, to moisturize the body. However, in general, some compositions contain cyclic silicone to give a smooth feel without stickiness after application, but they are difficult to wash off because they are not compatible with both oil and water, and recently silicone It has been difficult to incorporate silicone-based compounds into products because consumers tend to choose non-silicone products that do not contain silicone-based compounds.
このようなべたつきの問題を解決するために、例えば、特許文献１において、シリコーン系化合物を含有せずに、所定の融点を有するワセリンなどの炭化水素、粒状剤を含有し、指、手、腕、足、脚、体幹などの身体に塗布した後にべとつかずサラサラとした触感を付与することができる皮膚外用組成物が記載されている。そして、当該皮膚外用組成物によると、シリコーン系化合物を含有せずとも、皮膚に塗布したときにべたつかずサラサラとした触感となることが開示されている。 In order to solve this problem of stickiness, for example, Patent Document 1 discloses a method that does not contain a silicone compound but contains a hydrocarbon such as vaseline having a predetermined melting point, and a granular agent, and which is used for fingers, hands, arms, etc. describes a composition for external use on the skin that can provide a non-sticky and smooth texture after being applied to the body, such as the feet, legs, and trunk. It is also disclosed that the composition for external use on the skin provides a non-sticky and smooth texture when applied to the skin even without containing a silicone compound.
しかしながら、特許文献１の発明では、シリコーン系化合物を含有せずに塗布後にサラサラした触感を付与できたとしても、所定の融点を有するワセリンなどの炭化水素、粒状剤のみが含有されているため、特に冬場などの気温が低い寒い時季には硬くなり、指、手、腕、足、脚、体幹などの身体に塗布したときに伸ばしにくいという使用上の課題が存在した。 However, in the invention of Patent Document 1, even if a smooth texture can be imparted after application without containing a silicone-based compound, it only contains a hydrocarbon such as vaseline having a predetermined melting point and a granular agent. Particularly in cold seasons such as winter when the temperature is low, it becomes hard and difficult to spread when applied to the body such as fingers, hands, arms, feet, legs, and trunk, which is a problem in use.
そこで、本発明では、シリコーン系化合物を含有することなく、気温が低い寒い時季であっても、指、手、腕、足、脚、体幹などの身体に塗布したときに伸ばしやすく、さらには、気温が高い暑い時季であっても身体に塗布したときにべたつかず同様にサラサラした触感を付与することができる皮膚外用組成物を提供することを目的とする。 Therefore, the present invention does not contain silicone compounds and is easy to spread when applied to the body such as fingers, hands, arms, feet, legs, and trunk even in the cold season when the temperature is low. To provide a composition for external use on the skin, which is not sticky when applied to the body and can impart a smooth texture even in the hot season when the temperature is high.
〔１〕すなわち、本発明は、融点が３０～６０℃である第一炭化水素が４０～６０重量％と、前記第一炭化水素に分散されたコーンスターチが３５～５０重量％と、３７．８℃における動粘度が１０～８０ｍｍ2／ｓｅｃである第二炭化水素が５～２５重量％を含有することを特徴とする皮膚外用組成物である。 [1] That is, the present invention comprises 40 to 60% by weight of a first hydrocarbon having a melting point of 30 to 60°C, 35 to 50% by weight of cornstarch dispersed in the first hydrocarbon, and 37.8% by weight of cornstarch dispersed in the first hydrocarbon. This is a composition for external use on the skin, characterized in that it contains 5 to 25% by weight of a second hydrocarbon having a kinematic viscosity of 10 to 80 mm 2 /sec at °C.
〔２〕そして、前記コーンスターチの粒子径が１～５０μｍであることを特徴とする前記〔１〕に記載の皮膚外用組成物である。 [2] The skin external composition according to [1] above, wherein the cornstarch has a particle size of 1 to 50 μm.
〔３〕そして、前記第二炭化水素が流動パラフィンであることを特徴とする前記〔１〕又は前記〔２〕に記載の皮膚外用組成物である。 [3] The skin external composition according to [1] or [2] above, wherein the second hydrocarbon is liquid paraffin.
本発明によれば、シリコーン系化合物を含有することなく、気温が低い寒い時季であっても、指、手、腕、足、脚、体幹などの身体に塗布したときに伸ばしやすく、さらには、気温が高い暑い時季であっても身体に塗布したときにべたつかず同様にサラサラした触感を付与することができる。 According to the present invention, it does not contain silicone-based compounds and is easy to spread when applied to the body such as fingers, hands, arms, feet, legs, and trunk even in cold seasons when the temperature is low. Even in the hot season when the temperature is high, when applied to the body, it is not sticky and can give a similar smooth touch.
以下、本発明の皮膚外用組成物に関する実施形態について詳しく説明する。なお、説明中における範囲を示す表記「～」のある場合は、上限と下限を含有するものである。 Hereinafter, embodiments of the skin external composition of the present invention will be described in detail. In addition, when there is a notation "~" indicating a range in the description, it includes an upper limit and a lower limit.
本発明における第一炭化水素は、融点が３０～６０℃である化合物であり、常温で固形状又は形状を維持しつつ力を加えると変形する程度の半固形状の化合物である。第一炭化水素により、皮膚の保湿を高め、さらに、粒状剤が短期に沈殿することを防ぎ比較的長期間に亘り粒状剤を均一に分散させておくことができる。 The first hydrocarbon in the present invention is a compound having a melting point of 30 to 60° C., and is a semi-solid compound that maintains a solid state or shape at room temperature and deforms when force is applied. The first hydrocarbon enhances skin moisturization, and furthermore, prevents the particulate agent from settling in a short period of time and allows the particulate agent to be uniformly dispersed over a relatively long period of time.
第一炭化水素は、具体的には、ワセリン、固形パラフィンなどの直鎖炭化水素、分岐鎖含有炭化水素、脂環式炭化水素からなる炭化水素であることが好ましい。これらの第一炭化水素は、１種のみ又は２種以上組み合わせて使用することができる。 Specifically, the first hydrocarbon is preferably a hydrocarbon consisting of a straight chain hydrocarbon such as vaseline or solid paraffin, a branched chain-containing hydrocarbon, or an alicyclic hydrocarbon. These first hydrocarbons can be used alone or in combination of two or more.
第一炭化水素の皮膚外用組成物における含有割合としては、４０～６０重量％であることが好ましく、４０～５０重量％であることがさらに好ましい。当該第一炭化水素の含有割合が上記範囲内であると、皮膚外用組成物を皮膚に塗布したときに皮膚からの水分蒸発を抑制し保湿効果を高めることができる。 The content of the first hydrocarbon in the skin external composition is preferably 40 to 60% by weight, more preferably 40 to 50% by weight. When the content ratio of the first hydrocarbon is within the above range, when the composition for external use on the skin is applied to the skin, evaporation of water from the skin can be suppressed and the moisturizing effect can be enhanced.
本発明におけるコーンスターチは、トウモロコシを原料として製造されたでんぷんであり、第一炭化水素及び第二炭化水素に分散されている粒状の部材である。コーンスターチにより、皮膚外用組成物を皮膚に塗布したときのべたつきを抑制し、テカリも抑制することができる。 The corn starch in the present invention is a starch produced from corn as a raw material, and is a granular member dispersed in a first hydrocarbon and a second hydrocarbon. Cornstarch can suppress stickiness and shine when the external skin composition is applied to the skin.
コーンスターチとしては、粒子径が１～５０μｍであることが好ましく、２～３５μｍであることがさらに好ましい。コーンスターチの粒子径が上記範囲内であると、皮膚外用組成物を皮膚に塗布したときにべたつかずサラサラした触感を付与することができ、第一炭化水素による光の照り返しを抑えテカリを防ぐことができる。なお、粒子径は、光学顕微鏡による検鏡により測定される。 The cornstarch preferably has a particle size of 1 to 50 μm, more preferably 2 to 35 μm. When the particle size of the corn starch is within the above range, it is possible to impart a non-sticky and smooth texture when the external skin composition is applied to the skin, and it is possible to suppress the reflection of light caused by the primary hydrocarbon and prevent shine. can. Note that the particle size is measured using an optical microscope.
コーンスターチの皮膚外用組成物における含有割合としては、３５～５０重量％であることが好ましく、４０～４５重量％であることがさらに好ましい。当該コーンスターチの含有割合が上記範囲内であると、皮膚外用組成物を皮膚に塗布したときにべたつかずサラサラした触感を付与することができ、第一炭化水素による光の照り返しを抑えテカリを防ぐことができるとともに、塗布するときに皮膚外用組成物を伸ばしやすくなる。 The content of cornstarch in the skin external composition is preferably 35 to 50% by weight, more preferably 40 to 45% by weight. When the content ratio of the corn starch is within the above range, the composition for external use on the skin can be applied to the skin to provide a smooth and non-sticky texture, and can suppress the reflection of light caused by the primary hydrocarbon and prevent shine. It also makes it easier to spread the composition for external use on the skin when applying it.
本発明における第二炭化水素は、３７．８℃における動粘度が１０～８０ｍｍ2／ｓｅｃであり、常温で液状の化合物である。第二炭化水素が皮膚外用組成物に均一に分散されることにより、皮膚外用組成物の硬さを柔らかくし、冬場などの寒い時季、例えば、東京の１月の平均気温である約５℃のときにおいても、指、手、腕、足、脚、体幹などの身体に塗布したときに伸ばしやすく、さらには、夏場などの気温が高い暑い時季、例えば、東京の８月の平均気温である約２７℃を超える３０℃のときにおいても、身体に塗布したときにべたつかず同様にサラサラした触感を付与することができる。第二炭化水素において、上記動粘度が上記範囲未満であると、皮膚外用組成物の硬さが柔らかくなりすぎで身体に塗布したあとにべたつき感が生じて、そもそもサラサラした触感を付与することができず、また、上記動粘度が上記範囲を超えると、皮膚外用組成物の硬さが硬くなりすぎ、寒い時季に身体に塗布したときに伸ばしにくくなる。なお、動粘度については、ＪＩＳ Ｋ ２２８３、日本薬局方などに定められている方法により測定される。 The second hydrocarbon in the present invention has a kinematic viscosity of 10 to 80 mm 2 /sec at 37.8° C. and is a compound that is liquid at room temperature. By uniformly dispersing the secondary hydrocarbon in the composition for external use on the skin, the hardness of the composition for external use on the skin can be softened, and the hardness of the composition for external use on the skin can be softened. Even at times, it is easy to spread when applied to the body such as fingers, hands, arms, feet, legs, and trunk, and even during hot seasons such as summer when the temperature is high, for example, the average temperature in August in Tokyo. Even when the temperature is 30°C, which is higher than about 27°C, it is not sticky when applied to the body and can provide a similar smooth touch. If the kinematic viscosity of the second hydrocarbon is less than the above range, the hardness of the composition for external use on the skin will be too soft, resulting in a sticky feeling after being applied to the body, making it difficult to impart a smooth texture in the first place. If the above-mentioned kinematic viscosity exceeds the above-mentioned range, the composition for external use on the skin will be too hard and difficult to spread when applied to the body in cold weather. Note that the kinematic viscosity is measured by the method specified in JIS K 2283, Japanese Pharmacopoeia, and the like.
第二炭化水素の皮膚外用組成物における含有割合としては、５～２５重量％であることが好ましく、１０～２０重量％であることがさらに好ましい。当該第二炭化水素の含有割合が上記範囲内であると、第二炭化水素における上記動粘度と相俟って、冬場の寒い時季においても夏場の暑い時季においても、指、手、腕、足、脚、体幹などの身体に塗布したときに伸ばしやすく、べたつき感がなくサラサラした触感を付与することができ、寒暖差に大きな影響を受けにくい皮膚外用組成物を作製することができる。 The content of the second hydrocarbon in the skin external composition is preferably 5 to 25% by weight, more preferably 10 to 20% by weight. When the content ratio of the second hydrocarbon is within the above range, in combination with the above kinematic viscosity of the second hydrocarbon, fingers, hands, arms, and feet will be stable even in the cold season of winter and the hot season of summer. It is possible to produce a composition for external use on the skin that is easy to spread when applied to the body, such as the legs and trunk, provides a smooth texture without stickiness, and is not significantly affected by temperature differences.
〔実施例１〕
第一炭化水素として融点が５０～６０℃であるワセリン（Sonneborn社製、Snowwhite Special）を４０重量部、粒子径２～３５μｍであるコーンスターチ（日本コーンスターチ株式会社、コーンスターチホワイト）を３５重量部、第二炭化水素として流動パラフィン（三光化学工業製、流動パラフィンＮｏ．７０－Ｓ，３７．８℃における動粘度：１４ｍｍ2／ｓｅｃ）を２５重量部として１００重量部の組成物を調製し、湯浴で加熱しよく混合してコーンスターチを均一に分散することにより皮膚外用組成物を作製した。
[Example 1]
As the first hydrocarbon, 40 parts by weight of vaseline (manufactured by Sonneborn, Snowwhite Special) with a melting point of 50 to 60°C, 35 parts by weight of cornstarch (Japan Cornstarch Co., Ltd., Cornstarch White) with a particle size of 2 to 35 μm, A composition of 100 parts by weight was prepared using 25 parts by weight of liquid paraffin (manufactured by Sanko Kagaku Kogyo Co., Ltd., liquid paraffin No. 70-S, kinematic viscosity at 37.8°C: 14 mm 2 /sec) as the dihydrocarbon. A composition for external use on the skin was prepared by heating and mixing thoroughly to uniformly disperse the cornstarch.
〔実施例２〕
コーンスターチを４０重量部、流動パラフィン（流動パラフィンＮｏ．７０－Ｓ）を２０重量部とした以外は、実施例１と同様に皮膚外用組成物を作製した。
[Example 2]
A composition for external use on the skin was prepared in the same manner as in Example 1, except that the corn starch was 40 parts by weight and the liquid paraffin (liquid paraffin No. 70-S) was 20 parts by weight.
〔実施例３〕
コーンスターチを５０重量部、流動パラフィン（流動パラフィンＮｏ．７０－Ｓ）を１０重量部とした以外は、実施例１と同様に皮膚外用組成物を作製した。
[Example 3]
A composition for external use on the skin was prepared in the same manner as in Example 1, except that the corn starch was 50 parts by weight and the liquid paraffin (liquid paraffin No. 70-S) was 10 parts by weight.
〔実施例４〕
ワセリンを４５重量部、コーンスターチを５０重量部、流動パラフィン（流動パラフィンＮｏ．７０－Ｓ）を５重量部とした以外は、実施例１と同様に皮膚外用組成物を作製した。
[Example 4]
A skin external composition was prepared in the same manner as in Example 1, except that 45 parts by weight of petrolatum, 50 parts by weight of cornstarch, and 5 parts by weight of liquid paraffin (liquid paraffin No. 70-S) were used.
〔実施例５〕
ワセリンを５０重量部、コーンスターチを４５重量部、流動パラフィン（流動パラフィンＮｏ．７０－Ｓ）を５重量部とした以外は、実施例１と同様に皮膚外用組成物を作製した。
[Example 5]
A skin external composition was prepared in the same manner as in Example 1, except that 50 parts by weight of petrolatum, 45 parts by weight of cornstarch, and 5 parts by weight of liquid paraffin (liquid paraffin No. 70-S) were used.
〔実施例６〕
ワセリンを５０重量部、コーンスターチを４０重量部、流動パラフィン（流動パラフィンＮｏ．７０－Ｓ）を１０重量部とした以外は、実施例１と同様に皮膚外用組成物を作製した。
[Example 6]
A composition for external use on skin was prepared in the same manner as in Example 1, except that 50 parts by weight of petrolatum, 40 parts by weight of cornstarch, and 10 parts by weight of liquid paraffin (liquid paraffin No. 70-S) were used.
〔実施例７〕
ワセリンを６０重量部、流動パラフィン（流動パラフィンＮｏ．７０－Ｓ）を５重量部とした以外は、実施例１と同様に皮膚外用組成物を作製した。
[Example 7]
A composition for external use on skin was prepared in the same manner as in Example 1, except that 60 parts by weight of petrolatum and 5 parts by weight of liquid paraffin (liquid paraffin No. 70-S) were used.
〔実施例８〕
流動パラフィン（三光化学工業製、流動パラフィンＮｏ．３５０－Ｓ，３７．８℃における動粘度：７７ｍｍ2／ｓｅｃ）を２５重量部とした以外は、実施例１と同様に皮膚外用組成物を作製した。なお、流動パラフィンの種類を実施例１と変えている。
[Example 8]
A composition for external use on the skin was prepared in the same manner as in Example 1, except that liquid paraffin (manufactured by Sanko Kagaku Kogyo, liquid paraffin No. 350-S, kinematic viscosity at 37.8°C: 77 mm 2 /sec) was changed to 25 parts by weight. did. Note that the type of liquid paraffin was different from that in Example 1.
〔実施例９〕
コーンスターチを４０重量部、流動パラフィン（流動パラフィンＮｏ．３５０－Ｓ）を２０重量部とした以外は、実施例１と同様に皮膚外用組成物を作製した。なお、流動パラフィンの種類を実施例１と変えている。
[Example 9]
A composition for external use on skin was prepared in the same manner as in Example 1, except that 40 parts by weight of corn starch and 20 parts by weight of liquid paraffin (liquid paraffin No. 350-S) were used. Note that the type of liquid paraffin was different from that in Example 1.
〔実施例１０〕
コーンスターチを５０重量部、流動パラフィン（流動パラフィンＮｏ．３５０－Ｓ）を１０重量部とした以外は、実施例１と同様に皮膚外用組成物を作製した。なお、流動パラフィンの種類を実施例１と変えている。
[Example 10]
A composition for external use on the skin was prepared in the same manner as in Example 1, except that 50 parts by weight of corn starch and 10 parts by weight of liquid paraffin (liquid paraffin No. 350-S) were used. Note that the type of liquid paraffin was different from that in Example 1.
〔比較例１〕
コーンスターチを６０重量部とし、流動パラフィンを配合しなかった以外は、実施例１と同様に皮膚外用組成物を作製した。
[Comparative example 1]
A composition for external use on the skin was prepared in the same manner as in Example 1, except that corn starch was used in an amount of 60 parts by weight and liquid paraffin was not blended.
〔比較例２〕
ワセリンを５０重量部、コーンスターチを５０重量部とし、流動パラフィンを配合しなかった以外は、実施例１と同様に皮膚外用組成物を作製した。
[Comparative example 2]
A composition for external use on skin was prepared in the same manner as in Example 1, except that petrolatum was 50 parts by weight, cornstarch was 50 parts by weight, and liquid paraffin was not blended.
〔比較例３〕
コーンスターチを３０重量部、流動パラフィン（流動パラフィンＮｏ．３５０－Ｓ）を３０重量部とした以外は、実施例１と同様に皮膚外用組成物を作製した。なお、流動パラフィンの種類を実施例１と変えている。
[Comparative example 3]
A composition for external use on the skin was prepared in the same manner as in Example 1, except that corn starch was used in an amount of 30 parts by weight, and liquid paraffin (liquid paraffin No. 350-S) was used in an amount of 30 parts by weight. Note that the type of liquid paraffin was different from that in Example 1.
〔比較例４〕
コーンスターチを３０重量部、流動パラフィン（流動パラフィンＮｏ．７０－Ｓ）を３０重量部とした以外は、実施例１と同様に皮膚外用組成物を作製した。
[Comparative example 4]
A composition for external use on the skin was prepared in the same manner as in Example 1, except that 30 parts by weight of corn starch and 30 parts by weight of liquid paraffin (liquid paraffin No. 70-S) were used.
〔比較例５〕
コーンスターチを３５重量部、流動パラフィン（三光化学工業製、流動パラフィンＮｏ．４０－Ｓ，３７．８℃における動粘度：４．６ｍｍ2／ｓｅｃ）を２５重量部とした以外は、実施例１と同様に皮膚外用組成物を作製した。なお、流動パラフィンの種類を実施例１と変えている。
[Comparative example 5]
Example 1 except that 35 parts by weight of corn starch and 25 parts by weight of liquid paraffin (manufactured by Sanko Kagaku Kogyo, liquid paraffin No. 40-S, kinematic viscosity at 37.8°C: 4.6 mm 2 /sec) were used. A skin external composition was prepared in the same manner. Note that the type of liquid paraffin was different from that in Example 1.
上述したように作製した皮膚外用組成物の外観、物性及び使用感について、安定性の目視確認、皮膚摩擦値の変化の測定、５℃及び３０℃保存後における伸ばしやすさの官能評価、５℃及び３０℃保存後におけるべたつきの官能評価を行った。 Regarding the appearance, physical properties, and feeling of use of the skin external composition prepared as described above, visual confirmation of stability, measurement of change in skin friction value, sensory evaluation of ease of spreading after storage at 5°C and 30°C, and 5°C And a sensory evaluation of stickiness after storage at 30°C was performed.
〔保存安定性〕
作製した皮膚外用組成物を５０ｍｌのスクリュー管に入れ、３０℃で１日保存したときの状態を目視にて確認した。流動パラフィンの分離が全くみられない状態を○、流動パラフィンの分離が一部でも見られた状態を×と区分し、「〇」評価が好ましく、「×」評価は好ましくないと評価を行った。
[Storage stability]
The prepared composition for external use on the skin was placed in a 50 ml screw tube and stored at 30° C. for 1 day, and its condition was visually confirmed. A state in which no separation of liquid paraffin was observed was classified as ○, and a state in which separation of liquid paraffin was observed at least partially was classified as ×, with a rating of “〇” being favorable and a rating of “×” being unfavorable. .
〔皮膚摩擦値の変化〕
皮膚摩擦力は製剤の伸びを評価する指標として用いられ、一般に、値が大きい（皮膚摩擦が大きい）と伸びが悪く、値が小さい（皮膚摩擦が小さい）と伸びが良いとされている。冬場を想定した低温（５℃）と夏場を想定した高温（３０℃）での測定値を比較することで作製した皮膚外用組成物の伸びが温度による影響を客観的に評価した。具体的には、作製した皮膚外用組成物を約０．２ｇ／０．８ｃｍ2となるようにステンレスシャーレに塗布し，シャーレを５℃と３０℃の恒温槽でそれぞれ約３時間保存した。その後恒温槽から取り出して速やかに皮膚摩擦計（Courage + Khazaka製，Frictiometer FR700）を使用してそれぞれの保存温度での皮膚摩擦力を測定した。
下式のとおり、５℃保存後の測定値から３０℃保存後の測定値を差し引いて皮膚摩擦値の変化を算出した。
（皮膚摩擦値の変化）＝（５℃保存後の皮膚摩擦値）－（３０℃保存後の皮膚摩擦値）
この皮膚摩擦値の変化が小さいほど冬場と夏場において同様に伸びることとなり、１５０以下となる皮膚外用組成物を良好と判断した。当該評価は後述する伸ばしやすさの官能評価とも相関しており、妥当なものである。
[Change in skin friction value]
Skin friction force is used as an index to evaluate the elongation of a preparation, and it is generally said that the higher the value (higher skin friction), the worse the elongation, and the lower the value (lower skin friction), the better the elongation. The effect of temperature on the elongation of the prepared composition for external use on the skin was objectively evaluated by comparing the measured values at a low temperature (5°C) assuming winter and a high temperature (30°C) assuming summer. Specifically, the prepared composition for external use on the skin was applied to a stainless steel Petri dish in an amount of about 0.2 g/0.8 cm 2 , and the Petri dishes were stored in constant temperature baths at 5° C. and 30° C. for about 3 hours, respectively. Thereafter, the skin friction force at each storage temperature was immediately measured using a skin tribometer (manufactured by Courage + Khazaka, Frictiometer FR700) after removing the specimen from the constant temperature bath.
As shown in the formula below, the change in skin friction value was calculated by subtracting the measured value after storage at 30°C from the measured value after storage at 5°C.
(Change in skin friction value) = (Skin friction value after storage at 5℃) - (Skin friction value after storage at 30℃)
The smaller the change in this skin friction value, the more it stretches in winter and summer, and skin external compositions with a value of 150 or less were judged to be good. This evaluation correlates with the sensory evaluation of ease of stretching, which will be described later, and is appropriate.
〔伸ばしやすさ〕
上述したように、５℃及び３０℃保存後における伸ばしやすさについて官能評価を行った。具体的には、専門パネラー５名にて、作成した皮膚外用組成物を５℃又は３０℃の恒温槽に一日以上保存しそれぞれの温度となったものを、恒温槽から２３℃の環境下に取り出してすぐに０．２ｇを前腕に塗布したときの、伸ばしやすさについて、各１点から５点までの５段階の官能評価を行い、点数化して判断した。作製した皮膚外用組成物の伸ばしやすさを評価するに際して、評価基準として、伸ばしやすさを非常に感じる：５点、感じる：４点、やや感じる：３点、あまり感じない：２点、感じない：１点とし、各パネラーの平均点が３．５以上を〇、平均点が２．０以上３．５未満を△、平均点が２．０未満を×として区分し、「〇」評価が好ましく、「△」評価及び「×」評価は好ましくないと評価を行った。
[Ease of stretching]
As mentioned above, sensory evaluation was performed on the ease of stretching after storage at 5°C and 30°C. Specifically, 5 expert panelists stored the prepared skin external composition in a constant temperature bath at 5℃ or 30℃ for more than one day, and after the temperature reached each temperature, they removed the composition from the constant temperature bath in an environment of 23℃. Immediately after taking out the product, 0.2 g was applied to the forearm, and the ease of spreading was evaluated on a five-point scale from 1 to 5 points, and the score was evaluated. When evaluating the ease of spreading of the prepared composition for external use on the skin, the evaluation criteria were: Very easy to spread: 5 points, Feeling: 4 points, Slightly feeling: 3 points, Not feeling it very much: 2 points, Not feeling it. : 1 point, ○ if the average score of each panelist is 3.5 or more, △ if the average score is 2.0 or more and less than 3.5, and × if the average score is less than 2.0. It was evaluated as preferable, and “△” evaluation and “x” evaluation as unfavorable.
〔べたつき〕
上述したように、５℃及び３０℃保存後におけるべたつきについて官能評価を行った。具体的には、伸ばしやすさの評価と同様に、専門パネラー５名にて、作成した皮膚外用組成物を５℃又は３０℃の恒温槽に一日以上保存しそれぞれの温度となったものを、恒温槽から２３℃の環境下に取り出してすぐに０．２ｇを前腕に塗布したときの、べたつきについて、各１点から５点までの５段階の官能評価を行い、点数化して判断した。作製した皮膚外用組成物のべたつきを評価するに際して、評価基準として、感じない：５点、あまり感じない：４点、やや感じる：３点、感じる：２点、非常に感じる：１点とし、各パネラーの平均点が３．５以上を〇、平均点が２．０以上３．５未満を△、平均点が２．０未満を×として区分し、「〇」評価が好ましく、「△」評価及び「×」評価は好ましくないと評価を行った。
[Sticky]
As mentioned above, a sensory evaluation of stickiness after storage at 5°C and 30°C was performed. Specifically, in the same way as the spreadability evaluation, five expert panelists stored the prepared skin external compositions in a constant temperature bath at 5°C or 30°C for more than one day, and then evaluated the compositions at the respective temperatures. When 0.2 g of the product was applied to the forearm immediately after being taken out of the thermostatic bath in a 23°C environment, the stickiness was evaluated on a 5-point scale from 1 to 5 points and scored. When evaluating the stickiness of the prepared composition for external use on the skin, the evaluation criteria were: not feeling it: 5 points, not feeling it very much: 4 points, feeling it a little: 3 points, feeling it: 2 points, feeling it very much: 1 point, and each Panelists' average score of 3.5 or more is classified as ○, average score of 2.0 or more but less than 3.5 is classified as △, and average score of less than 2.0 is classified as ×. "〇" rating is preferable, "△" rating and "×" evaluations were evaluated as unfavorable.
実施例１～１０、比較例１～５について、保存安定性、皮膚摩擦値の変化、伸ばしやすさ、べたつきに関する結果を、それぞれ表１に示す。官能評価については評価の点数も併記した。なお、比較例３～５については、保存安定性が好ましくなかったので、他の評価については行わなかった。 Table 1 shows the results regarding storage stability, change in skin friction value, ease of spreading, and stickiness for Examples 1 to 10 and Comparative Examples 1 to 5. Regarding the sensory evaluation, the evaluation scores were also recorded. Note that for Comparative Examples 3 to 5, the storage stability was not favorable, so other evaluations were not performed.
表１に示すように、所定のワセリン、コーンスターチ及び所定の流動パラフィンを用いて特定範囲の配合割合にて均一混合した組成物では、所定の期間均一な状態を保つことができ、５℃と３０℃という冬場と夏場の寒暖差においても同様の伸びやすさを有しており、実際に５℃と３０℃に保存したものをそれぞれ皮膚に塗布すると同様に伸ばしやすく、べたつきもないサラサラした触感を付与するできることが分かった。 As shown in Table 1, a composition made by uniformly mixing specified petrolatum, cornstarch, and liquid paraffin in a specific range of blending ratios can maintain a uniform state for a specified period of time, and can maintain a uniform state at 5°C and 30°C. It has the same ease of spreading even under the temperature difference between winter and summer (℃), and when it is stored at 5℃ and 30℃ and applied to the skin, it spreads just as easily and has a smooth texture without stickiness. I found out that it can be granted.
Claims (3)
前記第一炭化水素に分散されたコーンスターチが３５～５０重量％と、
３７．８℃における動粘度が１０～８０ｍｍ2／ｓｅｃである第二炭化水素が５～２５重量％を
含有することを特徴とする皮膚外用組成物。 40 to 60% by weight of a first hydrocarbon having a melting point of 30 to 60°C;
35 to 50% by weight of corn starch dispersed in the first hydrocarbon;
A composition for external use on skin, characterized in that it contains 5 to 25% by weight of a second hydrocarbon having a kinematic viscosity of 10 to 80 mm 2 /sec at 37.8°C.
The skin external composition according to claim 1 or 2, wherein the second hydrocarbon is liquid paraffin.
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