ジシクロヘキシルメタン4,4'-ジイソシアナート (異性体混合物) 化学特性,用途語,生産方法
外観
無色～ほとんど無色透明液体
定義
本品は、次の化学式で表される有機化合物である。
用途
接着剤、塗料、ウレタンフォ-ム?エラストマーの原料など
主な用途／役割
ポリウレタン樹脂、ポリウレタンプレポリマー等の原料、水性高分子イソシアネート系接着剤の架橋剤として使用される。
説明
Methylene bis (4-cyclohexylisocyanate) (HMDI) (CAS No.
5124-30-1) is a clear to pale yellow liquid, which is soluble in
acetone water and is incompatible with alcohols, amines,
bases, acids, and may slowly polymerize if heated above 50 ℃.
HMDI reacts with water and alcohol.
化学的特性
Liquid.Soluble in acetone;reacts with water or ethanol.
使用
HMDI has excellent light stability and the stability of the six membered ring structure, has excellent weather resistance and excellent mechanical properties of polyurethane material, and is especially suitable for the production of high performance elastic body, a water polyurethane resin and UV resin.
定義
ChEBI: A diisocyanate consisting of dicyclohexylmethane with two isocyanate groups at the 4- and 4'-positions.
一般的な説明
Clear colorless to light-yellow liquid.
空気と水の反応
Reacts with water to form CO2
反応プロフィール
Isocyanates and thioisocyanates, such as Methylene-bis(4-cyclohexylisocyanate), are incompatible with many classes of compounds, reacting exothermically to release toxic gases. Reactions with amines, aldehydes, alcohols, alkali metals, ketones, mercaptans, strong oxidizers, hydrides, phenols, and peroxides can cause vigorous releases of heat. Acids and bases initiate polymerization reactions in these materials. Some isocyanates react with water to form amines and liberate carbon dioxide. Base-catalysed reactions of isocyanates with alcohols should be carried out in inert solvents. Such reactions in the absence of solvents often occur with explosive violence, [Wischmeyer(1969)].
危険性
Strong skin and eye irritant. Respiratorysensitization and lower respiratory tract irritant.
健康ハザード
Studies on test animals indicate that methy-lene bis(4-cyclohexylisocyanate) is highlytoxic by an inhalation route and can causesevere skin reaction. Exposure to 20 ppmfor 5 hours produced irritation of the respiratory tract, tremor, convulsion, congestion oflungs, and edema in rats. The symptoms atlower levels were decreased as to respirationrate and pulmonary irritation.
Contact with the skin can produce severeirritation, erythema, and edema. The oraltoxicity of this compound is very low.
LD50 value, oral (rats): 9900 mg/kg
There is no report of the compound’smutagenicity or carcinogenicity.
火災危険
Flash point data for Methylene-bis(4-cyclohexylisocyanate) are not available. Methylene-bis(4-cyclohexylisocyanate) is probably combustible.
安全性プロファイル
Poison by inhalation.
Mildly toxic by ingestion. When heated to
decomposition it emits very toxic fumes of
NOx and CN-.
職業ばく露
A potential danger to those involved
in the manufacture of this compound or its use in the production of light-stable, nonyellowing polyurethane resins.
環境運命予測
HMDI is a synthetic organic chemical which does not occur
naturally in the environment. At room temperature, it is
a liquid. HMDI hydrolyzes rapidly in water, producing
methylene bis(4-cyclohexylamine). The half-life for HMDI is
approximately 2 h. Due to its rapid hydrolysis, transport
between environmental compartments is unlikely to occur.
Because of the rapid hydrolysis, the assessment of the
substance is based on the hydrolysis product
methylenebis(cyclohexylamine) and not on HMDI. The
hydrolysis product was not classified as a PBT (persistent,
bioaccumulative, toxic) substance. These data indicate that
HMDI is not readily biodegradable. However, due to its rapid
hydrolysis, HMDI is neither persistent in the water compartment
nor bioaccumulative. The calculated Koc-value indicates
that HMDI may strongly adsorb to soil; however, any emission
to the terrestrial compartment would be affected by
humidity and, therefore, terrestrial accumulation is not expected
to occur.
輸送方法
UN2206 Isocyanates, toxic, n.o.s. or Isocyanate
solutions, toxic, n.o.s., flash point .61C and boiling point
,300C, Hazard Class: 6.1; Labels: 6.1-Poisonous materials., Technical Name Required.
不和合性
May form explosive mixture with air.
Isocyanates are highly flammable and reactive with many
compounds, even with themselves. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause
fires or explosions. Reaction with moist air, water or alcohols
may form amines and insoluble polyureas and react exothermically, releasing toxic, corrosive or flammable gases,
including carbon dioxide; and, at the same time, may generate a violent release of heat increasing the concentration of
fumes in the air. Incompatible with amines, aldehydes, alkali
metals, ammonia, carboxylic acids, caprolactum, alkaline
materials, glycols, ketones, mercaptans, hydrides, organotin
catalysts, phenols, strong acids, strong bases, strong reducing
agents such as hydrides, urethanes, ureas. Elevated temperatures or contact with acids, bases, tertiary amines, and acylchlorides may cause explosive polymerization. Attacks some
plastics, rubber and coatings. Contact with metals may evolve
flammable hydrogen gas. May accumulate static electrical
charges, and may cause ignition of its vapors. May slowly
polymerize if heated above 122F/50C. Contact with metals
may evolve flammable hydrogen gas.
廃棄物の処理
Methylene bis(4-cyclohexylisocyanate) isdissolved in acetone or any other combustible solvent and burned in a chemicalincinerator equipped with an afterburner andscrubber.
ジシクロヘキシルメタン4,4'-ジイソシアナート (異性体混合物) 上流と下流の製品情報
原材料
準備製品