JP3730039B2 - Whitening cosmetics - Google Patents
Whitening cosmetics Download PDFInfo
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- JP3730039B2 JP3730039B2 JP34842398A JP34842398A JP3730039B2 JP 3730039 B2 JP3730039 B2 JP 3730039B2 JP 34842398 A JP34842398 A JP 34842398A JP 34842398 A JP34842398 A JP 34842398A JP 3730039 B2 JP3730039 B2 JP 3730039B2
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- skin
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- whitening
- bza
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- 230000002087 whitening effect Effects 0.000 title claims description 16
- 239000002537 cosmetic Substances 0.000 title claims description 13
- 150000001875 compounds Chemical class 0.000 claims description 4
- 125000003118 aryl group Chemical group 0.000 claims description 3
- 238000012360 testing method Methods 0.000 description 23
- 210000003491 skin Anatomy 0.000 description 20
- 230000000694 effects Effects 0.000 description 19
- XUMBMVFBXHLACL-UHFFFAOYSA-N Melanin Chemical compound O=C1C(=O)C(C2=CNC3=C(C(C(=O)C4=C32)=O)C)=C2C4=CNC2=C1C XUMBMVFBXHLACL-UHFFFAOYSA-N 0.000 description 18
- 239000000126 substance Substances 0.000 description 16
- 239000000523 sample Substances 0.000 description 7
- 206010040880 Skin irritation Diseases 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000049 pigment Substances 0.000 description 6
- 231100000475 skin irritation Toxicity 0.000 description 6
- 230000036556 skin irritation Effects 0.000 description 6
- 206010015150 Erythema Diseases 0.000 description 5
- 102000003425 Tyrosinase Human genes 0.000 description 5
- 108060008724 Tyrosinase Proteins 0.000 description 5
- 239000006071 cream Substances 0.000 description 5
- 231100000321 erythema Toxicity 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 4
- 201000004624 Dermatitis Diseases 0.000 description 4
- 208000012641 Pigmentation disease Diseases 0.000 description 4
- 238000002835 absorbance Methods 0.000 description 4
- 210000000245 forearm Anatomy 0.000 description 4
- 239000006210 lotion Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000007853 buffer solution Substances 0.000 description 3
- 230000005764 inhibitory process Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000012488 sample solution Substances 0.000 description 3
- 239000002884 skin cream Substances 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- OUYCCCASQSFEME-QMMMGPOBSA-N L-tyrosine Chemical compound OC(=O)[C@@H](N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-QMMMGPOBSA-N 0.000 description 2
- 239000004480 active ingredient Substances 0.000 description 2
- 229960005070 ascorbic acid Drugs 0.000 description 2
- 235000010323 ascorbic acid Nutrition 0.000 description 2
- 239000011668 ascorbic acid Substances 0.000 description 2
- 238000004061 bleaching Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000005562 fading Methods 0.000 description 2
- -1 for example Substances 0.000 description 2
- 125000000687 hydroquinonyl group Chemical class C1(O)=C(C=C(O)C=C1)* 0.000 description 2
- 210000002826 placenta Anatomy 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- OUYCCCASQSFEME-UHFFFAOYSA-N tyrosine Natural products OC(=O)C(N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-UHFFFAOYSA-N 0.000 description 2
- OSVMUQBQOVBLBP-UHFFFAOYSA-N 1,5-bis(2-hydroxyphenyl)pentan-3-one Chemical compound OC1=CC=CC=C1CCC(=O)CCC1=CC=CC=C1O OSVMUQBQOVBLBP-UHFFFAOYSA-N 0.000 description 1
- JFXMPCKUENINRE-UHFFFAOYSA-N 1,5-bis(4-hydroxy-3-methoxyphenyl)pentan-3-one Chemical compound C1=C(O)C(OC)=CC(CCC(=O)CCC=2C=C(OC)C(O)=CC=2)=C1 JFXMPCKUENINRE-UHFFFAOYSA-N 0.000 description 1
- SFXSTVONLYIKNU-UHFFFAOYSA-N 1,5-bis(4-hydroxyphenyl)pentan-3-one Chemical compound C1=CC(O)=CC=C1CCC(=O)CCC1=CC=C(O)C=C1 SFXSTVONLYIKNU-UHFFFAOYSA-N 0.000 description 1
- 206010014970 Ephelides Diseases 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 206010061218 Inflammation Diseases 0.000 description 1
- 208000003351 Melanosis Diseases 0.000 description 1
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 description 1
- 230000003110 anti-inflammatory effect Effects 0.000 description 1
- HUMNYLRZRPPJDN-UHFFFAOYSA-N benzenecarboxaldehyde Natural products O=CC1=CC=CC=C1 HUMNYLRZRPPJDN-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000002051 biphasic effect Effects 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000035617 depilation Effects 0.000 description 1
- 239000002552 dosage form Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 210000001339 epidermal cell Anatomy 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 238000011597 hartley guinea pig Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- WZNJWVWKTVETCG-UHFFFAOYSA-N kojic acid Natural products OC(=O)C(N)CN1C=CC(=O)C(O)=C1 WZNJWVWKTVETCG-UHFFFAOYSA-N 0.000 description 1
- BEJNERDRQOWKJM-UHFFFAOYSA-N kojic acid Chemical compound OCC1=CC(=O)C(O)=CO1 BEJNERDRQOWKJM-UHFFFAOYSA-N 0.000 description 1
- 229960004705 kojic acid Drugs 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008099 melanin synthesis Effects 0.000 description 1
- 210000002752 melanocyte Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 238000012261 overproduction Methods 0.000 description 1
- QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Landscapes
- Cosmetics (AREA)
Description
【0001】
【発明の属する技術分野】
本発明は、皮膚刺激がなく、紫外線による皮膚の炎症抑制効果、メラニン色素の産生抑制効果に優れ、更には皮膚の色素沈着を速やかに淡色化する効果に優れた有用な美白化粧料に関する。
【0002】
【従来の技術及び発明が解決しようとする課題】
紫外線により皮膚の色調は変化し黒化する。黒化は、メラノサイトにおいて産生され表皮細胞に受け渡されるメラニンの過剰生産が原因であり、このメラニンについては、チロシンが酸化され産生されることが知られている。
【0003】
従来より、皮膚の黒化、しみやそばかす等の予防や治療を目的とする美白化粧料として、アスコルビン酸およびその誘導体、ハイドロキノン誘導体、コウジ酸等のピロン類、プラセンターエキス等の胎盤抽出物などを配合したものが提案されている。これらの物質は、メラニン生成の抑制、生成したメラニンの淡色漂白作用の効果などの美白効果を有する物質として開示されている。
【0004】
しかしながら、これらの物質は、例えばアスコルビン酸およびその誘導体は、保存安定性が不十分であったり、紫外線による炎症防止効果が十分に認められないことが多い。また、ハイドロキノン誘導体は安全性が十分ではないなど問題がある。このようにこれまでの物質ではメラニンの生成抑制効果、メラニンの淡色漂白作用、炎症防止効果、安全性等において総合的に優れる美白化粧料を得ることはなかなか難しいのが実情である。
【0005】
そこで、本発明の目的は、皮膚刺激がなく、紫外線による皮膚の炎症抑制効果、メラニン色素の産生抑制効果に優れ、更には皮膚の色素沈着を速やかに淡色化する効果に優れた有用な美白化粧料を提供することにある。
【0006】
【課題を解決するための手段】
本発明者らは、このような実情に鑑み、従来技術の難点を改良せんとして鋭意研究を重ねた結果、下記一般構造式化2で示される化合物から選択される少なくとも1種を配合した化粧料は、皮膚刺激がなく、紫外線による皮膚の炎症抑制効果、メラニン色素の産生抑制効果、更には皮膚の色素沈着を速やかに淡色化する効果に優れていることを見出し本発明を完成したものである。
【0007】
【化2】
(ただし、R1 =H,CH3,C2H5,C3H7,CH(CH3)2 を示す。またOR1基は各芳香環に1〜3個が置換したものを表わす。)
【0008】
即ち、本発明は、下記一般構造式化3で示される化合物(以下、BzAと略記する)から選択される少なくとも1種を配合することを特徴とする美白化粧料である。
【0009】
【化3】
(ただし、R1 =H,CH3,C2H5,C3H7,CH(CH3)2 を示す。またOR1基は各芳香環に1〜3個が置換したものを表わす。)
【0010】
【発明の実施の形態】
以下、本発明の構成を詳細について説明する。
【0011】
本発明の美白化粧料に用いられるBzAとしては、公知の合成方法、例えばアセトンとベンズアルデヒド化合物の縮合によって合成して得られたものをラネーNi存在下、水素によって還元し得る方法が挙げられ、その他天然物から抽出調製されたもの、市販品なども挙げられる。具体的には1,5−ビス[p−ハイドロキシフェニル]−ペンタン−3−オン、1,5−ビス[o−ハイドロキシフェニル]−ペンタン−3−オン、1,5−ビス[2,4−ジハイドロキシフェニル]−ペンタン−3−オン、1,5−ビス[3−メトキシ−4−ハイドロキシフェニル]−ペンタン−3−オンなどが挙げられる。
【0012】
そして、本発明に用いられるBzAの美白化粧料への配合量としては、美白化粧料の総量を基準として0.001〜5.0重量%(以下wt%とする)が好ましい。
【0013】
本発明の美白化粧料の剤型としては、ローション類、乳液類、クリーム類、パック類などが挙げられる。
【0014】
尚、本発明の美白化粧料には、色素、香料、防腐剤、界面活性剤、顔料等を本発明の目的を達成する範囲で適宜配合することができる。
【0015】
【実施例】
以下、実施例及び比較例に基づいて本発明を詳細に説明する。
【0016】
(1)紫外線紅斑抑制試験、(2)チロシナーゼ活性阻害試験、(3)皮膚色明度回復試験、(4)美白実用試験、及び(5)光パッチ試験の各試験法は以下の通りである。
【0017】
(1)紫外線紅斑抑制試験
除毛したハートレー系モルモット10匹の背部皮膚に、UVB領域の紫外線の最小紅斑量の2倍を各2ヶ所ずつ照射する。24時間前と照射直後に試料を塗布し、試料塗布部位とベース塗布部位とを設定して24時間後の紅斑の状態を表1の判定基準に従い評価する。
【0018】
【表1】
【0019】
(2)チロシナーゼ活性阻害試験
マックルベイン緩衝液(pH6.8)1mlに、0.3mg/ml濃度のチロシン溶液と各濃度の試料溶液を加え、37℃にて10分間の予備保温を行う。これに1mg/ml濃度のチロシナーゼ(シグマ社製)0.1mlを加え37℃にて15分間加温した後、分光光度計を用いて、波長475nmにて吸光度(A)を測定した。一方、チロシナーゼの代わりに緩衝液0.1mlを加えたものの吸光度(B)、試料溶液の代わりに緩衝液0.1mlを加えたものの吸光度(C)、更に試料溶液とチロシナーゼの代わりに緩衝液0.2mlを加えたものの吸光度(D)をそれぞれ測定して、下式に従い阻害率(%)を算出した。
【0020】
【数1】
【0021】
(3)皮膚色明度回復試験
被試験者20名の上腕内側部皮膚に、UVA、UVB領域の紫外線の最小紅斑量を3日間連続照射し、照射終了後、試料クリーム塗布部とベースクリーム塗布部皮膚の基準明度(V0 値、V0 ’値)を測定した。引き続いて、1日3回ずつ4週間連続で塗布し、照射開始1、2、4週間後の試料クリーム塗布部とベースクリーム塗布部皮膚の皮膚明度(Vn 値、Vn ’値)を測定して、表2の判定基準により皮膚色の回復評価を行った。
【0022】
尚、皮膚の明度(マンセル表示系V値)は、高速分光色彩計で測定して得られるX、Y、Z値より算出した。また、評価は被試験者20名の4週間後の評価点の平均値で示した。
【0023】
【表2】
【0024】
(4)美白実用試験
被試験者20名の前腕屈側部皮膚を、夏期の太陽光に3時間(1日1.5時間で2日間)曝した。左前腕屈側部皮膚には太陽光に曝された日から、右前腕屈側部皮膚には太陽光に曝された日の7日後から5mg/cm2の量の割合で試料(実施例)とベース(比較例)を朝夕1回ずつ、13週連続塗布した。なお、評価はベース塗布部、試料塗布部の効果が、顕著に確認された被験者の人数で示す。
【0025】
(5)光パッチ試験
被験者25名の前腕屈側部皮膚に対し試料0.05gを塗布した直径1.0cmのパッチ板を用いて24時間クローズドパッチを行った後、夏期の太陽光を6時間(1日3時間で2日間)照射した。
【0026】
評価は、表3の判定基準に従い被験者20名の皮膚の状態を評価判定した。判定結果は、照射24時間後に、(±)以上の人数で示した。
【0027】
【表3】
【0028】
実施例1〜6、比較例1 二相型ローション
表4の原料組成において、化4(BzA−1,2)、化5(BzA−3,4)、化6(BzA−5,6)のそれぞれの有効成分を表5に記載の如く配合して二相型ローションを調製し、前記の諸試験を実施した。
【0029】
【化4】
【0030】
【化5】
【0031】
【化6】
【0032】
【表4】
【0033】
【表5】
【0034】
(1)調製法
表4に記載のB成分をA成分中に均一に溶解した後、A成分とC成分とを均一に混合攪拌分散し、次いで容器に充填する。使用時には、内容物を均一に振盪分散して使用する。
【0035】
(2)特性
諸試験を実施した結果を表5に示した。表5に示す如く、実施例1〜6の本発明の二相型ローションは、諸試験の総てにおいて明らかに良好な結果を示し、ヒト皮膚での諸試験において皮膚刺激は生じなかった。一方、比較例1のものは、実施例のものに比べ諸試験において劣っていた。
【0036】
実施例7〜12、比較例2 スキンクリーム
表6の原料組成において、化7(BzA−7,8)、化8(BzA−9,10)、化9(BzA−11,12)のそれぞれの有効成分を表5に記載の如く濃度で配合してスキンクリームを調製し、前記の諸試験を実施した。
【0037】
【化7】
【0038】
【化8】
【0039】
【化9】
【0040】
【表6】
【0041】
(1)調製法
表6に記載のB成分をA成分に混合し、A成分とC成分とをそれぞれ均一に加熱溶解して温度を80℃にする。次いで、A成分中にC成分を注入攪拌混合した後、攪拌しながら温度を30℃まで冷却する。
【0042】
諸試験を実施した結果を表5に示した。表5に示す如く、実施例7〜12の本発明のスキンクリームは、諸試験の総てにおいて明らかに良好な結果を示し、ヒト皮膚での諸試験において皮膚刺激は生じなかった。一方、比較例2のものは、実施例のものに比べ諸試験において劣っていた。
【0043】
【発明の効果】
以上記載の如く、本発明は、皮膚刺激がなく、紫外線による皮膚の炎症抑制効果、メラニン色素の産生抑制効果に優れ、更には皮膚の色素沈着を速やかに淡色化する効果に優れた極めて有用な美白化粧料を提供することは明らかである。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a useful whitening cosmetic that has no skin irritation, is excellent in the effect of suppressing skin inflammation by ultraviolet rays, the effect of suppressing the production of melanin pigments, and is further excellent in the effect of promptly fading skin pigmentation.
[0002]
[Prior art and problems to be solved by the invention]
The skin tone changes due to ultraviolet rays and the skin becomes black. Blackening is caused by overproduction of melanin produced in melanocytes and delivered to epidermal cells, and it is known that tyrosine is oxidized and produced for this melanin.
[0003]
Conventionally, as whitening cosmetics for the purpose of prevention and treatment of skin darkening, spots, freckles, etc., ascorbic acid and its derivatives, hydroquinone derivatives, pyrones such as kojic acid, placenta extracts such as placenta extract, etc. Has been proposed. These substances are disclosed as substances having whitening effects such as suppression of melanin production and the effect of light color bleaching of the produced melanin.
[0004]
However, as for these substances, for example, ascorbic acid and derivatives thereof are often insufficient in storage stability and the anti-inflammatory effect by ultraviolet rays is not sufficiently observed. In addition, hydroquinone derivatives have problems such as insufficient safety. Thus, it is actually difficult to obtain whitening cosmetics that are generally excellent in the melanin production-suppressing effect, the light-color bleaching action of melanin, the inflammation-preventing effect, safety, etc.
[0005]
Accordingly, an object of the present invention is a useful whitening cosmetic that has no skin irritation, is excellent in the effect of suppressing skin inflammation by ultraviolet rays, the effect of suppressing the production of melanin pigments, and is further excellent in the effect of quickly lightening skin pigmentation. Is to provide a fee.
[0006]
[Means for Solving the Problems]
In view of such circumstances, the present inventors have conducted extensive research to improve the problems of the prior art, and as a result, have formulated at least one compound selected from the compounds represented by the following general structural formula 2. The present invention has been completed by finding that it has no skin irritation and is excellent in the effect of suppressing skin inflammation by ultraviolet rays, the effect of suppressing the production of melanin pigments, and the effect of rapidly fading skin pigmentation. .
[0007]
[Chemical formula 2]
(However, R 1 = H, CH 3 , C 2 H 5 , C 3 H 7 , CH (CH 3 ) 2. The OR 1 group represents one to three substituted on each aromatic ring. )
[0008]
That is, the present invention is a whitening cosmetic comprising at least one selected from compounds represented by the following general structural formula 3 (hereinafter abbreviated as BzA).
[0009]
[Chemical 3]
(However, R 1 = H, CH 3 , C 2 H 5 , C 3 H 7 , CH (CH 3 ) 2. The OR 1 group represents one to three substituted on each aromatic ring. )
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the configuration of the present invention will be described in detail.
[0011]
Examples of BzA used in the whitening cosmetic composition of the present invention include a known synthesis method, for example, a method in which a product obtained by synthesis by condensation of acetone and a benzaldehyde compound can be reduced with hydrogen in the presence of Raney Ni. Examples include those prepared by extraction from natural products and commercial products. Specifically, 1,5-bis [p-hydroxyphenyl] -pentan-3-one, 1,5-bis [o-hydroxyphenyl] -pentane-3-one, 1,5-bis [2,4- And dihydroxyphenyl] -pentan-3-one and 1,5-bis [3-methoxy-4-hydroxyphenyl] -pentan-3-one.
[0012]
And as a compounding quantity to the whitening cosmetics of BzA used for this invention, 0.001-5.0 weight% (henceforth wt%) is preferable on the basis of the total amount of whitening cosmetics.
[0013]
Examples of the dosage form of the whitening cosmetic of the present invention include lotions, emulsions, creams, packs and the like.
[0014]
The whitening cosmetic composition of the present invention can be appropriately blended with pigments, fragrances, preservatives, surfactants, pigments and the like within a range that achieves the object of the present invention.
[0015]
【Example】
Hereinafter, the present invention will be described in detail based on examples and comparative examples.
[0016]
The test methods of (1) ultraviolet erythema suppression test, (2) tyrosinase activity inhibition test, (3) skin color brightness recovery test, (4) whitening practical test, and (5) light patch test are as follows.
[0017]
(1) Ultraviolet erythema suppression test The dorsal skin of 10 Hartley guinea pigs that have undergone depilation is irradiated with 2 times the minimum amount of erythema in the UVB region at two locations. A sample is applied 24 hours before and immediately after irradiation, a sample application site and a base application site are set, and the state of erythema after 24 hours is evaluated according to the criteria shown in Table 1.
[0018]
[Table 1]
[0019]
(2) Tyrosinase activity inhibition test Add 0.3 mg / ml tyrosine solution and each concentration sample solution to 1 ml of Macclebain buffer (pH 6.8), and perform preliminary incubation at 37 ° C. for 10 minutes. To this was added 0.1 ml of 1 mg / ml tyrosinase (manufactured by Sigma), and the mixture was heated at 37 ° C. for 15 minutes, and then the absorbance (A) was measured at a wavelength of 475 nm using a spectrophotometer. On the other hand, the absorbance (B) when 0.1 ml of buffer solution was added instead of tyrosinase, the absorbance (C) when 0.1 ml of buffer solution was added instead of the sample solution, and the buffer solution 0 instead of the sample solution and tyrosinase. The absorbance (D) of each sample with 2 ml added was measured, and the inhibition rate (%) was calculated according to the following formula.
[0020]
[Expression 1]
[0021]
(3) Skin color brightness recovery test The inner skin of the upper arm of 20 test subjects was irradiated with the minimum amount of UV erythema in the UVA and UVB regions for 3 days. After the irradiation, the sample cream application part and the base cream application part The skin standard brightness (V0 value, V0 'value) was measured. Next, apply 3 times a day for 4 consecutive weeks, and measure the skin lightness (Vn value, Vn 'value) of the sample cream application part and base cream application part skin 1, 2, and 4 weeks after the start of irradiation. The skin color recovery evaluation was performed according to the criteria shown in Table 2.
[0022]
The lightness of the skin (Munsell display system V value) was calculated from X, Y, and Z values obtained by measurement with a high-speed spectral colorimeter. Moreover, evaluation was shown by the average value of the evaluation score of 20 test subjects after 4 weeks.
[0023]
[Table 2]
[0024]
(4) Skin whitening practical test 20 forearm flexor side skins were exposed to summer sunlight for 3 hours (1.5 hours per day for 2 days). Samples at a rate of 5 mg / cm 2 from the day when the left forearm flexor skin was exposed to sunlight and 7 days after the day when the right forearm flexor skin was exposed to sunlight (Example) And a base (comparative example) were applied once a morning and evening for 13 weeks. In addition, evaluation shows by the number of the test subjects by which the effect of the base application part and the sample application part was confirmed notably.
[0025]
(5) Light Patch Test After 24 hours of closed patching using a patch plate with a diameter of 1.0 cm on which 0.05 g of sample was applied to the skin of the forearm bent side of 25 subjects, summer sunlight was applied for 6 hours. Irradiation (3 hours per day for 2 days).
[0026]
The evaluation evaluated and evaluated the skin state of 20 subjects according to the determination criteria of Table 3. Judgment results were shown by (±) or more people 24 hours after irradiation.
[0027]
[Table 3]
[0028]
Examples 1 to 6, Comparative Example 1 Two-phase lotion In the raw material composition of Table 4, chemical formula 4 (BzA-1, 2), chemical formula 5 (BzA-3, 4), chemical formula 6 (BzA-5, 6) Each active ingredient was blended as shown in Table 5 to prepare a two-phase lotion, and the above tests were conducted.
[0029]
[Formula 4]
[0030]
[Chemical formula 5]
[0031]
[Chemical 6]
[0032]
[Table 4]
[0033]
[Table 5]
[0034]
(1) Preparation method After the B component described in Table 4 is uniformly dissolved in the A component, the A component and the C component are uniformly mixed, stirred and dispersed, and then filled into a container. At the time of use, the contents are shaken and dispersed uniformly.
[0035]
(2) Table 5 shows the results of the characteristic tests. As shown in Table 5, the inventive biphasic lotions of Examples 1-6 showed clearly good results in all the tests, and no skin irritation occurred in the tests on human skin. On the other hand, the thing of the comparative example 1 was inferior in various tests compared with the thing of an Example.
[0036]
Examples 7-12, Comparative Example 2 Skin cream In the raw material composition of Table 6, chemical formula 7 (BzA-7,8), chemical formula 8 (BzA-9,10), chemical formula 9 (BzA-11,12) Skin creams were prepared by blending active ingredients at concentrations as shown in Table 5, and the above tests were carried out.
[0037]
[Chemical 7]
[0038]
[Chemical 8]
[0039]
[Chemical 9]
[0040]
[Table 6]
[0041]
(1) Preparation method The B component described in Table 6 is mixed with the A component, and the A component and the C component are heated and dissolved uniformly to bring the temperature to 80 ° C. Next, the C component is injected into the A component and mixed with stirring, and then the temperature is cooled to 30 ° C. while stirring.
[0042]
The results of various tests are shown in Table 5. As shown in Table 5, the skin creams of the invention of Examples 7 to 12 showed clearly good results in all the tests, and no skin irritation occurred in the tests on human skin. On the other hand, the thing of the comparative example 2 was inferior in various tests compared with the thing of an Example.
[0043]
【The invention's effect】
As described above, the present invention has no skin irritation, is excellent in the effect of suppressing skin inflammation due to ultraviolet rays, the effect of suppressing the production of melanin pigments, and is extremely useful in the effect of rapidly lightening skin pigmentation. It is clear to provide whitening cosmetics.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34842398A JP3730039B2 (en) | 1998-12-08 | 1998-12-08 | Whitening cosmetics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34842398A JP3730039B2 (en) | 1998-12-08 | 1998-12-08 | Whitening cosmetics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000169323A JP2000169323A (en) | 2000-06-20 |
| JP3730039B2 true JP3730039B2 (en) | 2005-12-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34842398A Expired - Fee Related JP3730039B2 (en) | 1998-12-08 | 1998-12-08 | Whitening cosmetics |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3730039B2 (en) |
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1998
- 1998-12-08 JP JP34842398A patent/JP3730039B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000169323A (en) | 2000-06-20 |
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