メタクロレイン 化學(xué)特性,用途語,生産方法
外観
無色～うすい黃色透明液體
解説
CH
2＝C(CH
3)CHO．メタクリル酸に対応するアルデヒド．化學(xué)工業(yè)ではメタクロレインという通俗名でよばれる．高分子化學(xué)工業(yè)の原料として使われる．
用途
ラジカル重合で環(huán)狀ポリマー、アニオン重合で直鎖ポリマーとなる。共重合レジン、メタアクリロニトリル、メタアクリル酸の中間體、製紙工場のヘドロ用殺菌剤
化學(xué)的特性
colourless to light yellow liquid
使用
Methacrolein was used to study the effect of parts per billion levels of limonene oxidation products and the terpene oxidation product, methacrolein on human eye blink frequency. It was also used in determination of rate constants and the products of the reactions between atomic chlorine and acrolein, methacrolein and methyl vinyl ketone.
一般的な説明
A colorless liquid. Flash point 35°F. Less dense than water. May be toxic by ingestion, inhalation and skin absorption. Severely irritating to skin and eyes. Used to make plastics.
空気と水の反応
Highly flammable. Soluble in water.
反応プロフィール
Methacrolein is an aldehyde. Aldehydes are frequently involved in self-condensation or polymerization reactions. These reactions are exothermic; they are often catalyzed by acid. Aldehydes are readily oxidized to give carboxylic acids. Flammable and/or toxic gases are generated by the combination of aldehydes with azo, diazo compounds, dithiocarbamates, nitrides, and strong reducing agents. Aldehydes can react with air to give first peroxo acids, and ultimately carboxylic acids. These autoxidation reactions are activated by light, catalyzed by salts of transition metals, and are autocatalytic (catalyzed by the products of the reaction). The addition of stabilizers (antioxidants) to shipments of aldehydes retards autoxidation.
危険性
Flammable, dangerous fire risk. Strong irritant.
健康ハザード
TOXIC; may be fatal if inhaled, ingested or absorbed through skin. Inhalation or contact with some of these materials will irritate or burn skin and eyes. Fire will produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution.
火災(zāi)危険
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion and poison hazard indoors, outdoors or in sewers. May polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.
安全性プロファイル
Poison by ingestion and
sktn contact. Moderately toxic by inhalation.
Severe eye and skin irritant. Mutation data
reported. Dangerously flammable liquid
when exposed to heat, flame, or oxidizers.
Can react vigorously with oxidizing
materials. To fight fire, use CO2, alcohol
foam, foam, dry chemical. When heated to
decomposition it emits acrid smoke and
irritating fumes. See also ALDEHYDES.
純化方法
Fractionally distil it under nitrogen through a short Vigreux column (p 11). Store it in sealed ampoules. (Slight polymerisation may occur.) [Beilstein 1 IV 3455.]
メタクロレイン 上流と下流の製品情報
原材料
準(zhǔn)備製品
3,8-ジメチル-1,10-フェナントロリン
3,8-Dimethylquinoline
4-[3-(4-tert-ブチルフェニル)-2-メチルプロピル]-2,6-ジメチルモルホリン
2-メチルデカナール
2,4-ジメチル-1,3-ジオキソラン
2-ヒドロキシテトラヒドロフラン
酢酸2-メチル-2-プロペニル
キンメラック標(biāo)準(zhǔn)品
3,4-ジヒドロ-2H-ピラン-2-カルボアルデヒド
2,3-ジクロロ-5-メチルピリジン
3,4-epoxy-2-methyl-1-butene
2,3-ジクロロ-2-メチルプロパナール
6-メチル-1,4-ジアゼパン
2-Propen-1-ol, 2-methyl-, 1-formate