ヘキサメチルジシロキサン 化学特性,用途語,生産方法
外観
無色～ほとんど無色, 澄明の液体
定義
本品は、次の化学式で表される直鎖状シロキサンである。
溶解性
水に不溶。有機溶媒に可溶。エタノールに溶け、水にほとんど溶けない。
解説
ヘキサメチルジシロキサン，bis(trimethylsilyl)ether．C6H18OSi2(162.38)．(CH3)3SiOSi(CH3)3．ハロゲン化トリメチルシランの加水分解で得られる．無色の液体．融点－68 ℃，沸点99～100 ℃．d4200.764．nD201.3774．有機溶媒に可溶，水に不溶．塩素化剤の作用でクロロトリメチルシランを与える．シリコーン油，シリコーンゴムの製造原料に用いられるほか，化粧品用低粘性油にも使用される．
用途
有機合成原料。
用途
ポリマーのひび割れ防止剤、膨潤割,擁水剤、化粧品用低粘度油性原料、フォトリソグラフィー用(接着)開始剤、フルオロシリコーンオイル製造時のエンドブロッキング剤
化粧品の成分用途
皮膚コンディショニング剤、消泡剤
使用上の注意
不活性ガス封入
化学的特性
Hexamethyldisiloxane (HMDS) is a colorless or yellowish transparent liquid with a measured melting point of -68.2°C and a measured boiling point of 100.5°C at 1013 hPa. The measured vapor pressure is 44.51 hPa at 20 oC. The measured water solubility is 0.93 ± 0.63 mg/L at 23 oC. The measured log Kow of HMDS is 5.20 at 20 oC. Estimated log Koc values using EPISuite v 4.10 range from 2.5 (MCI method) to 4.5 (Kow method). As Episuite does not contain fragments for siloxanes for log Koc predictions, these values should be treated with caution. The potential for hydrolysis of the test substance may have influenced the determination of partition coefficient and water solubility.
物理的性質
Hexamethyldisiloxane is a colorless and transparent liquid. It is easily deliquescent, flammable, and has the risk of causing combustion when exposed to high heat, open flame, and strong oxidizing agents. Boiling point 99.5℃. Flash point -1.1℃. Relative density (d2525) 0.7606. refractive index 1.3750. insoluble in water, soluble in many organic solvents.
使用
Hexamethyldisiloxane is used as a base fluid in a wide range of personal care products that require fast evaporation and high spreadability. When blended with Dimethicone fluids, It can adjust the residence time of the silicone on the skin. Unlike other volatile fluids, Hexamethyldisiloxane Fluid does not cool the skin as it evaporates. Hexamethyldisiloxane is used as a carrying agent and diluent in the following: skin cream lotions, bath oils, suntan lotions, nail polishes, antiperspirants, deodorants, hair sprays and other beauty and hair care products.
A silicon based compound that can be used to create potentially biocompatible materials.
Used as a monomer in the synthesis of long chain polysiloxane structures.
Used in the methylation of mercury(II) salts.
定義
ChEBI: Hexamethyldisiloxane is an organosiloxane consisting of two trimethylsilyl groups covalently bound to a central oxygen.
調製方法
Produced via acid hydrolysis of chlorotrimethylsilane and
purification by distillation.
一般的な説明
Hexamethyldisiloxane (HMDSO), a linear polydisiloxane, is an organosilicon reagent commonly utilized as a source for plasma enhanced chemical vapor deposition (PE-CVD) of thin films of silicon compounds. It is also employed as a substitute to silane in silicon integrated circuit technology. Its dissociative ionization by electron impact has been studied by Fourier transform mass spectrometry. Synthesis of plasma-polymerized HMDSO thin films by atmospheric pressure glow (APG) discharge has been reported. Crystals of HMDSO at 148K are monoclinic. Addition of HMDSO to P
4S
10, improves its efficiency as thionating agent.
純化方法
Fractionally distil through a column packed with glass helices with ca 15 theoretical 20 1.3777. plates. It is highly flammable and is an irritant. [Mills & McKenzie J Am Chem Soc 76 2672 1954, Csakvari et al. J Organometal Chem 107 287 1976, Beilstein 4 IV 4018.]
ヘキサメチルジシロキサン 上流と下流の製品情報
原材料
N-メチルアニリン
101
クロロトリメチルシラン
(chlorodifluoroMethyl)triMethylsilane
Silane, trimethyl(trifluoroethenyl)-
Silane, 1,1'-(difluoromethylene)bis[1,1,1-trimethyl-
(ジフルオロメチル)トリメチルシラン
クロロジメチルビニルシラン
メチルビス(トリメチルシリルオキシ)シラン
1,3-ジビニルテトラメチルジシロキサン
1,1,1,3,3-ペンタメチル-3-ビニルプロパンジシロキサン
1,1,3,3,5,5,5-ヘプタメチル-2,4-ジオキサ-1,3,5-トリシラペンタン
デカメチルテトラシロキサン
(トリメチルシリルオキシ)ジメチルシラン
準備製品