JPH0720855B2 - UV shielding cosmetics - Google Patents
UV shielding cosmeticsInfo
- Publication number
- JPH0720855B2 JPH0720855B2 JP61120267A JP12026786A JPH0720855B2 JP H0720855 B2 JPH0720855 B2 JP H0720855B2 JP 61120267 A JP61120267 A JP 61120267A JP 12026786 A JP12026786 A JP 12026786A JP H0720855 B2 JPH0720855 B2 JP H0720855B2
- Authority
- JP
- Japan
- Prior art keywords
- titanium hydroxide
- less
- powder
- titanium
- weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q17/00—Barrier preparations; Preparations brought into direct contact with the skin for affording protection against external influences, e.g. sunlight, X-rays or other harmful rays, corrosive materials, bacteria or insect stings
- A61Q17/04—Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
- A61K8/29—Titanium; Compounds thereof
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dermatology (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Birds (AREA)
- Epidemiology (AREA)
- Cosmetics (AREA)
Description
【発明の詳細な説明】 ［技術分野］ 本発明は可視光線を透過させるが、紫外線を吸収し、散
乱させる化粧料に関する。Description: TECHNICAL FIELD The present invention relates to a cosmetic that transmits visible light but absorbs and scatters ultraviolet light.
［従来技術と問題点］ 一般に、皮膚を紫外線から保護するための日焼け防止化
粧料には紫外線を吸収する化合物が含まれている。例え
ば、有機系ではサリチル酸誘導体やパラアミノ安息香酸
など、無機顔料ではZnOTiO2、α−Fe2O3、タルク、カオ
リン等が使用されている。ところが上記有機系化合物は
紫外線により変質し易く、吸収力が低下するなど安定性
に乏しい問題がある。一方、無機顔料は変質が少なく、
皮膚への刺激もないが、隠蔽力が強いため皮膚の色自体
をも隠す問題がある。[Prior Art and Problems] Generally, a sunscreen cosmetic for protecting the skin from ultraviolet rays contains a compound that absorbs ultraviolet rays. For example, salicylic acid derivatives and para-aminobenzoic acid are used in organic systems, and ZnOTiO 2 , α-Fe 2 O 3 , talc, kaolin and the like are used as inorganic pigments. However, there is a problem in that the organic compound is poor in stability such that it is easily deteriorated by ultraviolet rays and its absorptivity is lowered. On the other hand, inorganic pigments have little deterioration,
Although it does not irritate the skin, it has a problem of hiding the skin color itself due to its strong hiding power.
このため、皮膚の色を隠蔽することなく紫外線を有効に
遮蔽する顔料として、可視光線の波長より微細な酸化チ
タン粉末を用いることが知られている。例えば、特公昭
47−42502号には平均粒径0.03〜0.04μｍの超微粒子状
酸化チタンを用いることが開示されており、また、特開
昭49−450号には粒径0.02〜0.1μｍの酸化チタン粉末を
用いることが開示されている。ところが上記酸化チタン
の微粒子粉末は紫外線吸収効果に限界があり、また一般
に火炎加水分解法で製造されるため製造が容易ではない
等の問題がある。Therefore, it is known to use titanium oxide powder finer than the wavelength of visible light as a pigment that effectively shields ultraviolet rays without hiding the skin color. For example,
47-42502 discloses the use of ultrafine particulate titanium oxide having an average particle size of 0.03 to 0.04 μm, and JP-A-49-450 discloses titanium oxide powder having a particle size of 0.02 to 0.1 μm. Use is disclosed. However, the above-mentioned fine particles of titanium oxide have a problem in that they have a limited ultraviolet ray absorbing effect and are not easily manufactured because they are generally manufactured by a flame hydrolysis method.
［問題の解決手段］ 本発明者は酸化チタンに代えて水酸化チタンを用いれ
ば、可視光線の透過性すなわち透明性が優れ、また紫外
線、特に290〜320nmの吸収が高くなることを見出した。[Means for Solving Problems] The present inventor has found that when titanium hydroxide is used instead of titanium oxide, the visible light transmittance, that is, the transparency is excellent, and the absorption of ultraviolet rays, particularly 290 to 320 nm, becomes high.
本発明は上記知見に基づき水酸化チタンを用いることに
より従来の問題を解決した。The present invention has solved the conventional problems by using titanium hydroxide based on the above findings.
［発明の構成］ 本発明によれば、ルチル型の水酸化チタン粉末であって
比表面積が60m2/g以上〜200m2/g未満、及び、アスペク
ト比が1.5以上〜10未満の紡錘型であり、脱水率が1.5％
〜15％である微細粉末を含有することを特徴とする紫外
線遮蔽化粧料が提供される。According to the configuration of the invention] The present invention, rutile titanium hydroxide powder and a specific surface area is 60 m 2 / g or more ~200m less than 2 / g, and, in spindle-type aspect ratio of 1.5 or more and less than 10 Yes, dehydration rate is 1.5%
Provided is a UV-shielding cosmetic, characterized in that it contains a fine powder of ˜15%.
また、その好適な実施態様として、上記水酸化チタン粉
末を0.5重量％以上〜10重量％以下含有する化粧料が提
供される。Further, as a preferred embodiment thereof, a cosmetic containing the titanium hydroxide powder in an amount of 0.5% by weight or more and 10% by weight or less is provided.
本発明は、ルチル型の水酸化チタン粉末であって、比表
面積が60m2/g以上〜250m2/g未満および、アスペクト比
が1.5以上〜10未満の紡錘型であり、脱水率が2.0％〜15
％である微細粉末を用いる。The present invention relates to a titanium hydroxide powder rutile-type specific surface area of 60 m 2 / g or more ~250m 2 / g and less than, the aspect ratio is a spindle type of less than 1.5 to 10, and dewatering rate is 2.0% ~ 15
% Of fine powder is used.
従来の酸化チタン粉末は四塩化チタンを原料として、こ
れを火炎加水分解して製造されるが、上記水酸化チタン
粉末は四塩化チタン水溶液を湿式加水分解して水酸化チ
タンを生成させ、次いで、150〜600℃の温度で焼成し、
水酸基を残存させてルチル化を行なうことにより製造さ
れる。The conventional titanium oxide powder is produced by flame hydrolysis of titanium tetrachloride as a raw material.The titanium hydroxide powder is hydrolyzed from an aqueous titanium tetrachloride solution to produce titanium hydroxide, and then, Firing at a temperature of 150-600 ℃,
It is produced by leaving the hydroxyl group and performing rutile formation.
上記水酸化チタンは水酸基が表面に存在するため粉体の
凝集が極度に少なく、各粒子が個々に分散されるため紫
外線の吸収能に優れ、かつ可視光線での透明性も高くな
るものと考えられる。Since the titanium hydroxide has hydroxyl groups on the surface, the aggregation of the powder is extremely small, and each particle is dispersed individually, so that it is excellent in the ability to absorb ultraviolet rays, and the transparency in visible light is also considered to be high. To be
水酸基の量は、脱水率が2.0％以上〜15％未満である。
上記脱水率とは水酸化チタンを800℃、２時間、焼成し
た際に次式から求められる値を言う。The amount of hydroxyl groups is such that the dehydration rate is 2.0% or more and less than 15%.
The dehydration rate is a value obtained from the following equation when titanium hydroxide is baked at 800 ° C. for 2 hours.
脱水率（％）＝［脱水量／水酸化チタン重量］×100 脱水率が2.0％未満である場合には分散性向上の効果が
なく、また15％を超えると水酸化チタンの結晶型が無定
型になるので好ましくない。脱水率の好ましい範囲は５
％〜10％である。Dehydration rate (%) = [Dehydration amount / Titanium hydroxide weight] x 100 If the dehydration rate is less than 2.0%, there is no effect of improving dispersibility, and if it exceeds 15%, there is no titanium hydroxide crystal form. It is not preferable because it becomes a fixed form. The preferred range of dehydration rate is 5
% To 10%.
また上記水酸化チタンはルチル型の結晶型を有する。従
来の微粒状酸化チタンの結晶型はアナターゼ型または無
定型であるため屈折率が小さい。本発明は、水酸基を有
しかつ屈折率の高いルチル型の水酸化チタンを用いるこ
とにより紫外線の吸収効果が格段に向上するものと推察
される。The titanium hydroxide has a rutile crystal type. Since the crystalline form of conventional fine-grained titanium oxide is anatase type or amorphous type, its refractive index is small. In the present invention, it is speculated that the use of rutile-type titanium hydroxide having a hydroxyl group and a high refractive index significantly improves the effect of absorbing ultraviolet rays.
（アナターゼ型屈折率:nω＝2.5612、ｎε＝2.488ルチ
ル型屈折率:nω＝2.6124、ｎε＝2.8993） 更に上記水酸化チタンは比表面積が60m2/g以上、250m2/
g未満のものが用いられる。比表面積が60m2/g未満であ
ると水酸化チタンの隠蔽力が強くなり白化する。比表面
積が、250m2/gを超えると粒子が微細に過ぎて寧ろ粒子
の分散が悪くなる。好ましくは70〜150m2/gが良い。(Anatase type refractive index: n ω = 2.5612, n ε = 2.488 rutile type refractive index: n ω = 2.6124, n ε = 2.8993) Furthermore, the titanium hydroxide has a specific surface area of 60 m 2 / g or more, 250 m 2 /
Less than g is used. When the specific surface area is less than 60 m 2 / g, the masking power of titanium hydroxide becomes strong and whitening occurs. If the specific surface area exceeds 250 m 2 / g, the particles become too fine and the dispersion of the particles becomes worse. 70 to 150 m 2 / g is preferable.
また粒子の形状は、紡錘型のものは一般に球状のものに
比較して隠蔽力が弱く、同一比表面積のとき透明性が増
大することから、上記水酸化チタン粒子はアスペクト比
（長径／短径）が1.5以上、10未満の紡錘型であるもの
を用いる。Further, the shape of the particles is such that the spindle-shaped particles generally have a lower hiding power than the spherical particles, and the transparency increases at the same specific surface area. Therefore, the titanium hydroxide particles have an aspect ratio (major axis / minor axis). ) Is 1.5 or more and less than 10 spindle type.
上記水酸化チタン粉末と従来の酸化チタン粉末につい
て、次のように紫外線吸収効果と可視光線の透過性を調
べた。With respect to the titanium hydroxide powder and the conventional titanium oxide powder, the ultraviolet absorption effect and the visible light transmittance were examined as follows.
ポリプロピレン（厚さ20μｍ）のフイルム上に上記水酸
化チタン粉末と従来の酸化チタン粉末とを夫々３重量％
添加したウレタン塗料（ウレタン樹脂15重量％、溶剤：
セロアセテート17重量％、酢酸ブチル68重量％）を厚さ
20μｍになるまで塗布し、分光光度計（日本分光工業社
製:UVIDEC−510）を用いて紫外線吸収効果と可視光線の
透過性を調べた。この結果を第１表に示す。3% by weight each of the above-mentioned titanium hydroxide powder and conventional titanium oxide powder on a polypropylene (thickness 20 μm) film.
Added urethane paint (urethane resin 15% by weight, solvent:
Thickness of celloacetate 17% by weight, butyl acetate 68% by weight)
The solution was applied to 20 μm, and the ultraviolet absorption effect and visible light transmittance were examined using a spectrophotometer (UVIDEC-510 manufactured by JASCO Corporation). The results are shown in Table 1.
この結果から明らかなように、本発明で用いる上記水酸
化チタン粉末は従来の酸化チタン粉末に比べて、２倍以
上の吸収効果を有し、また可視光線の透過性も優れてい
ることが分る。As is clear from this result, it is found that the titanium hydroxide powder used in the present invention has an absorption effect more than twice that of the conventional titanium oxide powder and is also excellent in visible light transmittance. It
本発明の化粧料は上記水酸化チタン粉末を化粧料基材、
例えば、ファンデーション等の各種クリーム、乳液、ヘ
アオイル、口紅などに適量配合することにより得られ
る。The cosmetic of the present invention comprises the titanium hydroxide powder as a cosmetic base material,
For example, it can be obtained by mixing an appropriate amount with various creams such as foundation, milky lotion, hair oil, lipstick and the like.
配合量は各化粧料によって適宜定められるが、通常、紫
外線遮蔽効果との関係から0.5重量％〜10重量％以下が
適当である。The blending amount is appropriately determined depending on each cosmetic, but usually 0.5% by weight to 10% by weight or less is suitable in view of the effect of shielding ultraviolet rays.
［実施例および比較例］ 本発明の上記水酸化チタン粉末と従来の酸化チタン粉末
とを夫々第２表に示すＡ層に４部加え、該Ａ層とＢ層と
を個別に加温して混合し、乳化させてサンクリームを製
造した。[Examples and Comparative Examples] The titanium hydroxide powder of the present invention and the conventional titanium oxide powder were added to 4 parts of each layer A shown in Table 2, and the layers A and B were individually heated. The mixture was mixed and emulsified to prepare a sun cream.
上記サンクリームを用いて人体による日焼けテストを行
なった。被験者男女30名の背部に上記サンクリームを直
径2cmの大きさに0.025g塗布し、300nmの紫外線を１、４
時間照射した。発生した紅斑および色素沈着の程度を色
差計により測定した。この結果を第３表に示す。A sunburn test was conducted on the human body using the above sun cream. The above sun cream was applied to the backs of 30 male and female subjects in an amount of 2 cm in diameter and 0.025 g, and ultraviolet rays of 300 nm were applied for 1, 4
Irradiated for an hour. The degree of erythema and pigmentation that occurred were measured by a color difference meter. The results are shown in Table 3.
この結果に示されるように、本発明のサンクリームは従
来のものに比べ、紫外線遮蔽効果が格段に優れている。As shown in these results, the sun cream of the present invention has a markedly superior ultraviolet shielding effect as compared with the conventional ones.
［発明の効果］ 本発明の化粧料は紫外線の遮断効果に優れる一方可視光
線の透過性がよく、皮膚の色を隠蔽せず自然な色合いを
保つ利点がある。更に本発明の化粧料に用いる水酸化チ
タンは従来の酸化チタンに比べて製造が容易であり、製
造コストを低下することができる。また透明なプラスチ
ックに添加することにより紫外線を遮蔽した透明組成物
とすることもできる。[Effects of the Invention] The cosmetic of the present invention has an excellent effect of blocking ultraviolet rays, but also has a good transparency to visible rays, and has an advantage of not hiding the skin color and maintaining a natural shade. Furthermore, the titanium hydroxide used in the cosmetic of the present invention is easier to manufacture than conventional titanium oxide, and the manufacturing cost can be reduced. A transparent composition that shields ultraviolet rays can also be obtained by adding it to transparent plastic.
Claims (2)
表面積が60m2/g以上〜250m2/g未満および、アスペクト
比が1.5以上〜10未満の紡錘型であり、脱水率が2.0％〜
15％である微細粉末を含有することを特徴とする紫外線
遮蔽化粧料。1. A titanium hydroxide powder rutile-type specific surface area of 60 m 2 / g or more ~250m 2 / g and less than, the aspect ratio is a spindle type of less than 1.5 to 10, and dewatering rate is 2.0 % ~
A UV-shielding cosmetic material comprising 15% of fine powder.
0重量％以下含有する特許請求の範囲第１項の化粧料。2. The titanium hydroxide powder is 0.5% by weight or more to 1
The cosmetic according to claim 1, which contains 0% by weight or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61120267A JPH0720855B2 (en) | 1986-05-27 | 1986-05-27 | UV shielding cosmetics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61120267A JPH0720855B2 (en) | 1986-05-27 | 1986-05-27 | UV shielding cosmetics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62281812A JPS62281812A (en) | 1987-12-07 |
| JPH0720855B2 true JPH0720855B2 (en) | 1995-03-08 |
Family
ID=14781986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61120267A Expired - Fee Related JPH0720855B2 (en) | 1986-05-27 | 1986-05-27 | UV shielding cosmetics |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0720855B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5849307A (en) * | 1981-09-16 | 1983-03-23 | Pola Chem Ind Inc | Cosmetic |
-
1986
- 1986-05-27 JP JP61120267A patent/JPH0720855B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5849307A (en) * | 1981-09-16 | 1983-03-23 | Pola Chem Ind Inc | Cosmetic |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62281812A (en) | 1987-12-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |