JP5368068B2 - Water-in-oil emulsion composition - Google Patents

Water-in-oil emulsion composition Download PDF

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JP5368068B2
JP5368068B2 JP2008298807A JP2008298807A JP5368068B2 JP 5368068 B2 JP5368068 B2 JP 5368068B2 JP 2008298807 A JP2008298807 A JP 2008298807A JP 2008298807 A JP2008298807 A JP 2008298807A JP 5368068 B2 JP5368068 B2 JP 5368068B2
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integer
water
emulsion composition
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oil emulsion
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JP2010120913A (en
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直史 山本
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Kao Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a water-in-oil type emulsion composition which is good in extensibility, is free from tackiness, has a base-forming effect and is excellent in storage stability. <P>SOLUTION: The water-in-oil type emulsion composition contains (A) an evaporable silicone oil, (B) sorbitan monoisostearate and/or diglyceryl monoisostearate, and (C) a polyoxyalkylene alkyl-comodified organopolysiloxane represented by general formul (1) [wherein, R is H or a 1 to 5C alkyl; (x) is an integer of 5 to 50; (y) is an integer of 1 to 30; (a) is an integer of 2 to 20; (b) is an integer of 1 to 5; (c) is an integer of 2 to 20; (d) is an integer of 0 to 20]. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本発明はのびが良く、べたつきが無く、下地効果を有し、保存安定性にも優れる油中水型乳化組成物に関する。   The present invention relates to a water-in-oil emulsified composition having good spreading, no stickiness, a base effect, and excellent storage stability.

油中水型乳化化粧料は、肌へのなじみが良く、肌表面に油膜を作ることから水分の蒸散を防ぎ、肌を乾燥から守り、肌に潤いを与えることが知られている。また撥水性に優れ、化粧くずれが少ないことからメークアップ化粧料、日焼け止め化粧料などに広く用いられている。しかしながら、油中水型乳化化粧料は、油が外相であるため、のびが重く、べたつきを生じたり、感触が悪くなる場合がある。近年、油中水型乳化化粧料において、さっぱりとしてべたつきが少ないものを得るため、油剤としてシリコーン油を配合したり、水分を高配合することが検討されている(特許文献1〜5)。しかしながら、油中水型乳化化粧料にシリコーン系油剤や水を多量に配合することは、保存安定性の点から困難であった。このため、経時での保存安定性が良好で、のびが良く、べたつきが無く使用感に優れた油中水型乳化化粧料が望まれていた。   It is known that water-in-oil emulsified cosmetics are well-familiar with the skin and prevent oil from transpiration by creating an oil film on the skin surface, protecting the skin from drying and moisturizing the skin. In addition, it is widely used in makeup cosmetics, sunscreen cosmetics and the like because of its excellent water repellency and low makeup loss. However, since the oil-in-water emulsified cosmetic is an external phase, the oil is heavy and sticky or feels bad in some cases. In recent years, in water-in-oil emulsified cosmetics, in order to obtain a refreshing and less sticky product, it has been studied to blend silicone oil as an oil agent or to blend water with a high content (Patent Documents 1 to 5). However, it has been difficult from the viewpoint of storage stability to add a large amount of silicone oil or water to the water-in-oil emulsified cosmetic. For this reason, a water-in-oil emulsified cosmetic with good storage stability over time, good spread, no stickiness and excellent usability has been desired.

特開平4−370152号公報JP-A-4-370152 特開平5−178733号公報JP-A-5-178733 特開平6−40847号公報JP-A-6-40847 特開2001−58917号公報JP 2001-58917 A 特開2001−139424号公報JP 2001-139424 A

従って本発明では、のびが良く、べたつきが無く、下地効果を有し、保存安定性にも優れる油中水型乳化組成物を提供することを目的とする。   Accordingly, an object of the present invention is to provide a water-in-oil emulsion composition that has good spreading, no stickiness, has a base effect, and is excellent in storage stability.

上記の目的を達成するための本発明は、(A)揮発性シリコーン油、(B)モノイソステアリン酸ソルビタン及び/又はモノイソステアリン酸ジグリセリル、及び(C)下記一般式(1)で表されるポリオキシアルキレンアルキル共変性オルガノポリシロキサンを含有する油中水型乳化組成物にある。   The present invention for achieving the above object is represented by (A) volatile silicone oil, (B) sorbitan monoisostearate and / or diglyceryl monoisostearate, and (C) represented by the following general formula (1). It is in a water-in-oil emulsion composition containing a polyoxyalkylene alkyl co-modified organopolysiloxane.

(式中、Rは水素原子又は炭素原子数1〜5のアルキル基を表し、xは5〜50、yは1〜30、zは20〜200、aは2〜20、bは1〜5、cは2〜20、dは0〜20の整数を表す。) (Wherein R represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, x is 5 to 50, y is 1 to 30, z is 20 to 200, a is 2 to 20, b is 1 to 5) C represents an integer of 2 to 20, and d represents an integer of 0 to 20.)

第2の本発明は、さらに(D)下記一般式(2)で表される架橋型ポリエーテル変性シリコーンを含有する上記の油中水型乳化組成物にある。   2nd this invention exists in said water-in-oil emulsion composition containing the bridge | crosslinking-type polyether modified silicone represented by (D) following General formula (2) further.

(式中、p1、p2は10〜200、qは1〜10、rは3〜20の整数を表す。) (Wherein, p 1 and p 2 are 10 to 200, q is 1 to 10, and r is an integer of 3 to 20)

本発明に係る油中水型乳化組成物は、保存安定性に優れ、皮膚に外用した場合、のびが良く、べたつきを感じさせないという優れた官能特性を有し、さらに下地効果においても優れた特性を有する。   The water-in-oil emulsified composition according to the present invention is excellent in storage stability, has excellent sensory characteristics that it does not feel sticky when applied externally to the skin, and also has excellent ground effect Have

以下、本発明の実施の形態について詳説する。本発明で(A)成分として用いられる揮発性シリコーン油は、大気圧下における沸点が250℃以下のシリコーン油であり、例えば式{(CHSiO}で示される環状ジメチルポリシロキサン(式中、mは3〜6の整数)、式(CHSiO{(CH)RSiO}Si(CHで示されるシロキサン化合物(式中、nは0〜4の整数、Rは炭素数1〜8の炭化水素基又は−OSi(CH)、又はこれらの混合物である。その具体例としては、デカメチルシクロペンタシロキサン、オクタメチルシクロテトラシロキサン、カプリリルメチコン、オクタメチルトリシロキサン、デカメチルテトラシロキサン、メチルトリメチコン等が挙げられる。 Hereinafter, embodiments of the present invention will be described in detail. The volatile silicone oil used as the component (A) in the present invention is a silicone oil having a boiling point of 250 ° C. or lower under atmospheric pressure. For example, a cyclic dimethylpolysiloxane represented by the formula {(CH 3 ) 2 SiO} m ( In the formula, m is an integer of 3 to 6, and a siloxane compound represented by the formula (CH 3 ) 3 SiO {(CH 3 ) RSiO} n Si (CH 3 ) 3 (wherein n is an integer of 0 to 4, R is a hydrocarbon group having 1 to 8 carbon atoms, —OSi (CH 3 ) 3 ), or a mixture thereof. Specific examples thereof include decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane, caprylylmethicone, octamethyltrisiloxane, decamethyltetrasiloxane, methyltrimethicone and the like.

本発明の油中水型乳化組成物における(A)揮発性シリコーン油の含有量は、乳化組成物の総量を基準として1〜40質量%(以下、単に%と記す。)が好ましく、特に好ましくは5〜30%である。これらの範囲内であれば、揮発性シリコーンの持つさっぱりとした感触がより強く感じられ、乳化組成物の保存安定性においても特に優れる。   The content of (A) volatile silicone oil in the water-in-oil emulsion composition of the present invention is preferably 1 to 40% by mass (hereinafter simply referred to as%), particularly preferably based on the total amount of the emulsion composition. Is 5-30%. Within these ranges, the refreshing feel of the volatile silicone is felt more strongly, and the storage stability of the emulsion composition is particularly excellent.

本発明で(B)成分として用いられるモノイソステアリン酸ソルビタンは、ブドウ糖を還元して得られるd−ソルビトール又はその分子内脱水物であるソルビタンと、イソステアリン酸を等モル反応させて得られるソルビタン脂肪酸エステルである。同じく(B)成分として用いられるモノイソステアリン酸ジグリセリルは、グリセリンの二量体であるジグリセリンとイソステアリン酸を反応させて得られるモノエステルである。   The sorbitan monoisostearate used as the component (B) in the present invention is sorbitan fatty acid ester obtained by equimolar reaction of d-sorbitol obtained by reducing glucose or sorbitan which is an intramolecular dehydrate thereof and isostearic acid. It is. Similarly, diglyceryl monoisostearate used as the component (B) is a monoester obtained by reacting diglycerin, which is a dimer of glycerin, with isostearic acid.

本発明の油中水型乳化組成物における(B)モノイソステアリン酸ソルビタン及び/又はモノイソステアリン酸ジグリセリルの含有量は、乳化組成物の総量を基準として0.1〜3%が好ましく、特に好ましくは0.3〜1.5%である。これらの範囲内であれば、乳化組成物の保存安定性において特に優れ、使用感においてもべたつき感を感じさせないより優れた感触が得られる。(B)成分のうち、モノイソステアリン酸ソルビタンは、のびの良さの面でモノイソステアリン酸ジグリセリルよりも優れるため、本発明において特
に好ましく用いられる。
The content of (B) sorbitan monoisostearate and / or diglyceryl monoisostearate in the water-in-oil emulsion composition of the present invention is preferably 0.1 to 3%, particularly preferably based on the total amount of the emulsion composition. Is 0.3 to 1.5%. If it is in these ranges, it is especially excellent in the storage stability of an emulsion composition, and the more excellent touch which does not give a sticky feeling also in a usability | use_condition is obtained. Among the components (B), sorbitan monoisostearate is particularly preferably used in the present invention because it is superior to diglyceryl monoisostearate in terms of good spreadability.

本発明で(C)成分として用いられるポリオキシアルキレンアルキル共変性オルガノポリシロキサンは、前記一般式(1)で表される公知の物質である。特に、該一般式においてRが水素原子で、xが5〜50、yが1〜15、zが20〜150、aが14〜18、bが3、cが3〜11、dが0〜13のものが入手しやすく、効果の面でも優れるため好ましく用いられる。相当する原料としては、ゴールドシュミット社製の「ABIL EM90」が挙げられる。   The polyoxyalkylene alkyl co-modified organopolysiloxane used as the component (C) in the present invention is a known substance represented by the general formula (1). In particular, in the general formula, R is a hydrogen atom, x is 5 to 50, y is 1 to 15, z is 20 to 150, a is 14 to 18, b is 3, c is 3 to 11, and d is 0 to 0. No. 13 is easily used and preferably used because of its excellent effect. As a corresponding raw material, “ABIL EM90” manufactured by Goldschmidt is cited.

本発明の油中水型乳化組成物における(C)ポリオキシアルキレンアルキル共変性オルガノポリシロキサンの含有量は、乳化組成物の総量を基準として0.1〜3%が好ましく、特に好ましくは0.5〜2%である。これらの範囲内であれば、乳化組成物の保存安定性において特に優れ、使用感においてものびの良さの点でより優れた感触が得られる。   The content of the (C) polyoxyalkylene alkyl co-modified organopolysiloxane in the water-in-oil emulsion composition of the present invention is preferably 0.1 to 3%, particularly preferably 0.8%, based on the total amount of the emulsion composition. 5 to 2%. If it is in these ranges, it will be especially excellent in the storage stability of an emulsion composition, and the more excellent feeling in the point of the ease of use will be acquired in a usability | use_condition.

本発明では、さらに(D)成分として架橋型ポリエーテル変性シリコーンを配合することにより、のびの良さの点でより優れた感触を有し、下地効果が向上した油中水型乳化組成物とすることができる。本発明で用いられる架橋型ポリエーテル変性シリコーンは、下記一般式(2)で表されるものである。   In the present invention, a water-in-oil emulsified composition having a superior feel in terms of good spread and improved base effect by further blending a cross-linked polyether-modified silicone as component (D). be able to. The crosslinked polyether-modified silicone used in the present invention is represented by the following general formula (2).

(式中、p1、p2は10〜200、qは1〜10、rは3〜20の整数を表す。) (Wherein, p 1 and p 2 are 10 to 200, q is 1 to 10, and r is an integer of 3 to 20)

本発明で用いられる架橋型ポリエーテル変性シリコーンは、特開平4−272932号公報、及び特開平5−140320号公報に記載されている方法により製造することができる。   The crosslinked polyether-modified silicone used in the present invention can be produced by the methods described in JP-A-4-272932 and JP-A-5-140320.

本発明で用いられる架橋型ポリエーテル変性シリコーンは、予めシリコーン油と剪断力下で混練処理し、ペースト状ポリエーテル変性シリコーン組成物とされたものを使用するのが好ましい。ここで用いられるシリコーン油としては、25℃における粘度が100mPa・s以下の低粘度シリコーン油が好ましく用いられ、例えばジメチルポリシロキサン、メチルフェニルポリシロキサン、ジエチルポリシロキサン、エチルメチルポリシロキサン、エチルフェニルポリシロキサン等の鎖状シリコーン油や、ヘキサメチルシクロトリシロキサン、オクタメチルシクロテトラシロキサン、デカメチルシクロペンタシロキサン、ドデカメチルシクロヘキサシロキサン、テトラデカメチルシクロヘプタシロキサン等の環状シリコーン油等が例示される。これらシリコーン油は1種単独又は2種以上を組み合わせて用いることができる。   The cross-linked polyether-modified silicone used in the present invention is preferably a paste-modified polyether-modified silicone composition previously kneaded with silicone oil under a shearing force. As the silicone oil used here, a low-viscosity silicone oil having a viscosity of 100 mPa · s or less at 25 ° C. is preferably used. For example, dimethylpolysiloxane, methylphenylpolysiloxane, diethylpolysiloxane, ethylmethylpolysiloxane, ethylphenylpolysiloxane. Examples include chain silicone oils such as siloxane, and cyclic silicone oils such as hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, and tetradecamethylcycloheptasiloxane. These silicone oils can be used alone or in combination of two or more.

架橋型ポリエーテル変性シリコーンとシリコーン油との剪断力下での混練物であるペースト状ポリエーテル変性シリコーン組成物は、例えば「KSG」シリーズ(信越化学工業社製)等として市販されており、商業的に入手可能である。本発明では、KSG−21又はKSG−210(信越化学工業社製)を使用するのが特に好ましい。   Paste-like polyether-modified silicone compositions, which are kneaded products of a cross-linked polyether-modified silicone and silicone oil under a shearing force, are commercially available, for example, as the “KSG” series (manufactured by Shin-Etsu Chemical Co., Ltd.). Are available. In the present invention, it is particularly preferable to use KSG-21 or KSG-210 (manufactured by Shin-Etsu Chemical Co., Ltd.).

本発明の油中水型乳化組成物における(D)架橋型ポリエーテル変性シリコーンの含有量は、乳化組成物の総量を基準として0.1〜3%が好ましく、特に好ましくは0.5〜1.5%である。これらの範囲内であれば、のびの良さやべたつきを感じさせないという感触の面で、より優れた効果が得られる。   The content of the (D) cross-linked polyether-modified silicone in the water-in-oil emulsion composition of the present invention is preferably 0.1 to 3%, particularly preferably 0.5 to 1, based on the total amount of the emulsion composition. .5%. If it is in these ranges, a more excellent effect can be obtained in terms of the feeling that it does not feel good stretchiness or stickiness.

本発明の油中水型乳化組成物には、上記の必須成分に加えて、必要に応じて上記以外の紫外線吸収剤、上記以外の油性成分、乳化剤(界面活性剤)、紫外線散乱剤、保湿剤、粉体、香料、防腐剤、植物エキス、フッ素化合物、樹脂、粘剤、塩類、溶媒、酸化防止剤、キレート剤、中和剤、pH調整剤、昆虫忌避剤、生理活性成分等を配合することができる。   In the water-in-oil emulsion composition of the present invention, in addition to the above essential components, an ultraviolet absorber other than the above, an oil component other than the above, an emulsifier (surfactant), an ultraviolet scattering agent, a moisturizing agent, if necessary. Contains ingredients, powders, fragrances, preservatives, plant extracts, fluorine compounds, resins, stickers, salts, solvents, antioxidants, chelating agents, neutralizing agents, pH adjusters, insect repellents, bioactive ingredients, etc. can do.

本発明の油中水型乳化組成物は、化粧クリーム、乳液、サンスクリーン剤、化粧下地等の皮膚化粧料に応用できる。   The water-in-oil emulsion composition of the present invention can be applied to skin cosmetics such as cosmetic creams, emulsions, sunscreen agents, and makeup bases.

次に、実施例によって本発明を更に詳細に説明するが、本発明はこれらに限定されるものではない。実施例に先立ち、各実施例で採用した評価方法を説明する。   EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited to these. Prior to the examples, the evaluation methods employed in each example will be described.

<官能特性評価>
10名の専門パネラーが評価試料を顔面に塗布し、その時の感触(のびの良さ、べたつき感の無さ)について、下記評価基準に従って5段階で評点をつけた。専門パネラー10名の評点の平均点を求め、4.0以上を◎、3.0以上4.0未満を◎、2.0以上3.0未満を△、2.0未満を×とした。
<Evaluation of sensory characteristics>
Ten professional panelists applied the evaluation samples to the face and scored the feel (goodness of spread, no stickiness) in five stages according to the following evaluation criteria. The average score of 10 professional panelists was evaluated, and 4.0 or higher was evaluated as ◎, 3.0 or higher and lower than 4.0 as ◎, 2.0 or higher and lower than 3.0 as Δ, and less than 2.0 as X.

(評価基準)
5:非常に好ましい
4:好ましい
3:どちらともいえない
2:好ましくない
1:非常に好ましくない
(Evaluation criteria)
5: Very favorable 4: Preferred 3: Neither 2: Unfavorable 1: Very unfavorable

<下地効果>
10名の専門パネラーが評価試料を顔面に塗布し、その上から市販のファンデーションにより化粧を行い、その時のファンデーションの塗布性(均一に肌に塗布されるかどうか)及び5時間経過後の化粧状態に関して、上記と同様の評価基準に従って5段階で評点をつけた。専門パネラー10名の評点の平均点を求め、4.0以上を◎、3.0以上4.0未満を◎、2.0以上3.0未満を△、2.0未満を×とした。
<Earth effect>
Ten expert panelists apply the evaluation sample to the face, and then make up with a commercially available foundation. The foundation's applicability (whether it is evenly applied to the skin) and the makeup state after 5 hours have passed. Was scored in five steps according to the same evaluation criteria as above. The average score of 10 professional panelists was evaluated, and 4.0 or higher was evaluated as ◎, 3.0 or higher and lower than 4.0 as ◎, 2.0 or higher and lower than 3.0 as Δ, and less than 2.0 as X.

<保存安定性>
評価試料を、遠心分離機(高速冷却遠心機CR21G、日立工機社製)で遠心分離処理した(20℃、5000rpm、1時間)。処理後の状態を目視観察し、3段階[○:状態変化なし、△:僅かに分離を認める、×:明らかに分離を認める]で評価した。
<Storage stability>
The evaluation sample was centrifuged (20 ° C., 5000 rpm, 1 hour) with a centrifuge (high-speed cooling centrifuge CR21G, manufactured by Hitachi Koki Co., Ltd.). The state after the treatment was visually observed and evaluated in 3 stages [◯: no change in state, Δ: slightly separated, x: clearly separated).

実施例1、参考例1〜2、比較例1〜3(化粧クリーム)
表1に示した処方の油中水型乳化組成物(化粧クリーム)を常法により作製し、前記各評価を実施した。その結果を表1に併せて示す。尚、表1における配合量は質量%である。
Example 1 , Reference Examples 1-2 , Comparative Examples 1-3 (cosmetic cream)
A water-in-oil emulsion composition (cosmetic cream) having the formulation shown in Table 1 was prepared by a conventional method, and each evaluation was performed. The results are also shown in Table 1. In addition, the compounding quantity in Table 1 is the mass%.

(表1)
(Table 1)

表1に示すように、本発明の実施例は、のびが良く、べたつきが無く、優れた下地効果を有し、保存安定性にも優れていた。一方、必須成分のいずれかを欠いた比較例は、官能特性、下地効果、保存安定性のいずれかの点で劣ることがわかる。   As shown in Table 1, the examples of the present invention had good stretch, no stickiness, excellent ground effect, and excellent storage stability. On the other hand, it can be seen that the comparative example lacking any of the essential components is inferior in any of sensory characteristics, ground effect, and storage stability.

実施例4(サンスクリーン剤)
原 料 名 配合量(質量%)
――――――――――――――――――――――――――――――――――――
1. デカメチルシクロペンタシロキサン 12.0
2. カプリリルメチコン 10.0
3. モノイソステアリン酸ソルビタン 1.2
4. ポリオキシアルキレンアルキル共変性 1.0
オルガノポリシロキサン(注1)
5. 架橋型ポリエーテル変性シリコーン混合物(注3) 4.0
6. ポリオキシアルキレン変性シリコーン混合物(注4) 5.0
7. ジメチルポリシロキサン(6cs) 5.0
8. メチルフェニルポリシロキサン(注5) 5.0
9. シリコーン処理微粒子酸化亜鉛 15.0
10. 1,3−ブチレングリコール 7.0
11. グリチルリチン酸ステアリル 0.1
12. フェノキシエタノール 0.3
13. 精製水 残 部
――――――――――――――――――――――――――――――――――――
注4:BY22−008(東レダウコーニング社製)
注5:SH−556(東レダウコーニング社製)
Example 4 (sunscreen agent)
Raw material name Compounding amount (% by mass)
――――――――――――――――――――――――――――――――――――
1. Decamethylcyclopentasiloxane 12.0
2. Caprylyl Methicone 10.0
3. Sorbitan monoisostearate 1.2
4. Polyoxyalkylene alkyl co-modification 1.0
Organopolysiloxane (Note 1)
5. Cross-linked polyether-modified silicone mixture (Note 3) 4.0
6. Polyoxyalkylene-modified silicone mixture (Note 4) 5.0
7. Dimethylpolysiloxane (6cs) 5.0
8. Methylphenylpolysiloxane (Note 5) 5.0
9. Silicone-treated fine particle zinc oxide 15.0
10. 1,3-Butylene glycol 7.0
11. Stearyl glycyrrhizinate 0.1
12. Phenoxyethanol 0.3
13. Purified water balance ――――――――――――――――――――――――――――――――――――
Note 4: BY22-008 (manufactured by Toray Dow Corning)
Note 5: SH-556 (manufactured by Toray Dow Corning)

上記組成の油中水型乳化組成物(サンスクリーン剤)を作製し評価したところ、のびが良く、べたつきが無く、下地効果に優れ、保存安定性の点においても優れていた。   When a water-in-oil emulsion composition (sunscreen agent) having the above composition was prepared and evaluated, it showed good spreading, no stickiness, excellent base effect, and excellent storage stability.

上記実施例4において使用したシリコーン処理微粒子酸化亜鉛は、次のように調製した。微粒子酸化亜鉛ZnO350(住友大阪セメント社製、平均一次粒子径20nm、比表面積45m2/g)96質量部と、メチルハイドロジェンポリシロキサンHRS−2(信越化学工業社製)4質量部を、ヘキサン400質量部と共に混合しスラリー化した後、減圧下に加熱しヘキサンを除去し、ついで得られた粉末をアトマイザー(ピンミル)を用いて粉砕し、ステンレス製バットに移した。ステンレス製バットを送風気流型で熱交換器を有するガス式乾燥機に入れ、室温から180℃まで2時間かけて昇温させた後に180℃にて10時間乾燥させてシリコーン処理微粒子酸化亜鉛を得た。 The silicone-treated fine particle zinc oxide used in Example 4 was prepared as follows. 96 parts by mass of fine particle zinc oxide ZnO350 (Sumitomo Osaka Cement, average primary particle size 20 nm, specific surface area 45 m 2 / g) and 4 parts by mass of methyl hydrogen polysiloxane HRS-2 (Shin-Etsu Chemical Co., Ltd.) After mixing with 400 parts by mass to form a slurry, the mixture was heated under reduced pressure to remove hexane, and the resulting powder was pulverized using an atomizer (pin mill) and transferred to a stainless steel bat. A stainless steel bat is placed in a gas dryer having a blast airflow type and having a heat exchanger, heated from room temperature to 180 ° C. over 2 hours, and then dried at 180 ° C. for 10 hours to obtain silicone-treated fine zinc oxide. It was.

本発明の油中水型乳化組成物は、のびが良く、べたつきが無く、下地効果に優れ、保存安定性にも優れており、化粧クリーム、乳液、サンスクリーン剤、化粧下地等の皮膚化粧料として利用することが可能である。   The water-in-oil emulsion composition of the present invention has good spread, no stickiness, excellent base effect, excellent storage stability, skin cosmetics such as cosmetic creams, emulsions, sunscreen agents, cosmetic bases, etc. It can be used as

Claims (1)

(A)揮発性シリコーン油、(B)モノイソステアリン酸ソルビタン及び/又はモノイソステアリン酸ジグリセリル、(C)下記一般式(1)で表されるポリオキシアルキレンアルキル共変性オルガノポリシロキサン、及び(D)下記一般式(2)で表される架橋型ポリエーテル変性シリコーンを含有する油中水型乳化組成物。
(式中、Rは水素原子又は炭素原子数1〜5のアルキル基を表し、xは5〜50、yは1〜30、zは20〜200、aは2〜20、bは1〜5、cは2〜20、dは0〜20の整数を表す。)
(式中、p1、p2は10〜200、qは1〜10、rは3〜20の整数を表す。)
(A) volatile silicone oil, (B) sorbitan monoisostearate and / or diglyceryl monoisostearate , ( C) a polyoxyalkylene alkyl co-modified organopolysiloxane represented by the following general formula (1) , and (D ) A water-in-oil emulsion composition containing a cross-linked polyether-modified silicone represented by the following general formula (2) .
(Wherein R represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, x is 5 to 50, y is 1 to 30, z is 20 to 200, a is 2 to 20, b is 1 to 5) C represents an integer of 2 to 20, and d represents an integer of 0 to 20.)
(In the formula, p1 and p2 are 10 to 200, q is an integer of 1 to 10, and r is an integer of 3 to 20.)
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