トリメリット酸無水物

外観

白色～わずかにうすい黄色, フレーク

溶解性

熱水, エタノールに可溶, アセトンに易溶。アセトンに極めて溶けやすく、エタノール及び熱水に溶ける。

解説

C9H4O5(192.13)．トリメリト酸無水物，無水トリメリット酸ともいう．ベンゼン核に3個のカルボキシル基が1,2,4の位置についたものをトリメリト酸といい，このうち隣接したカルボキシル基から水を除去したものをいう．工業的製法には，1,2,4-トリメチルベンゼン(プソイドクメン)を酸化する方法，およびパラキシレンをクロロメチル化して酸化する方法などがある．白色の固体．融点166～168 ℃，沸点200 ℃(0.27 kPa)，250 ℃(2.1 kPa)．d"1.54．アセトンに可溶，キシレンに微溶．おもに塩化ビニル樹脂用可塑剤，耐熱性ポリイミド樹脂および水溶性塗料の原料として用いられる．森北出版「化学辞典（第2版）

用途

水溶性塗料、樹脂原料

用途

有機合成(可塑剤)原料。

用途

水溶性塗料、エステル系耐熱性可塑剤原料、ポリアミドイミド原料、エポキシ樹脂硬化剤、接着剤、安定剤、繊維処理剤、界面活性剤、染料、顔料

主な用途／役割

エポキシ樹脂の硬化剤として使用される。

化学的特性

Trimellitic anhydride is a white powder or flakes. It is the anhydride of trimellitic acid (1,2,4-benzenetricarboxylic acid). It is soluble in water, ethanol, acetone and other general organic solvents.

使用

Trimellitic Anhydride is mainly used as raw material for polyester resin,polyimide resin,plasticizer TOTM ,and also be used for producing heatproof & insulating,adhesive,surfactant, paint,synthesize dye materials etc. Trimellitic anhydride is used as an embossing agent for vinyl flooring and as a curing agent for epoxy resins. It is also used as an intermediate for the synthesis of surface coatings chemicals, adhesives, polymers, dyes printing inks, pharmaceuticals .

定義

ChEBI: Trimellitic anhydride is a 2-benzofuran compound having oxo groups at the 1- and 3-positions and a carboxy substituent at the 5-position; the cyclic anhydride formed from the carboxy groups at the 1- and 2-positions of trimellitic acid. It has a role as an epitope, an allergen and a hapten. It is a cyclic dicarboxylic anhydride, a dioxo monocarboxylic acid and a member of 2-benzofurans. It is functionally related to a phthalic anhydride and a trimellitic acid.

一般的な説明

1,2,4-Benzenetricarboxylic anhydride(TA) is a hydrophilic monomer with multipurpose usage; as a curing agent for epoxy based resins and as a plasticizer for polyvinyl chloride(PVC).

空気と水の反応

Sensitive to moisture. Hydrolyzes slowly. Solutions in water or alcohol may be unstable. Insoluble in water.

反応プロフィール

1,2,4-Benzenetricarboxylic anhydride reacts exothermically with water. This reaction is expected to be slow, but can become vigorous if local heating accelerates it. Reaction with water is accelerated by acids. Incompatible with acids, strong oxidizing agents, alcohols, amines, and bases. Incompatible with strong oxidizing agents, strong acids or strong bases. .

危険性

Toxic by inhalation. Respiratory sensitization.

健康ハザード

Trimellitic anhydride (TMAN) causes both respiratory irritation and immunologic respiratory disease.

安全性プロファイル

Moderately toxic by ingestion. Has caused pulmonary edema from inhalation. Irritant to lungs and air passages. May be a powerful allergen. Typical attack consists of breathlessness, wheezing, cough, running nose, immunologcal sensitization, and asthma symptoms. When heated to decomposition it emits acrid smoke and irritating fumes. See also ANHYDRIDES.

合成

3-Xylene is carbonylated with carbon monoxide in the presence of boron trifluoride and hydrogen fluoride to form 2,4-dimethylbenzaldehyde. 2,4-Dimethylbenzaldehyde is decomplexed from the acids, purified, and oxidized to trimellitic acid. Trimellitic acid is subjected to normal dehydration and purification steps to obtain high quality trimellitic anhydride.

職業ばく露

TMA is used to produce trimellitate plasticizers, poly (amide-imide) polymers; in paints, enamels, and coatings; polymers, polyesters; as a curing agent for epoxy and other resins; in vinyl plasticizers; agricultural chemicals; dyes and pigments; pharmaceuticals, surface active agents; modifiers, intermediates, and specialty chemicals.

発がん性

There are no reports of carcinogenicity associated with TMAN exposure. It was not mutagenic in bacterial assays with or without metabolic activation. No teratogenic effects or developmental toxicity was seen in rats or guinea pigs exposed to 500mg/m3 for 6 hours/day during their period of major organogenesis.

不和合性

Dust can cause an explosion. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides. Reacts slowly with water, forming trimellitic acid. Compounds of the carboxyl group react with all bases, both inorganic and organic (i.e., amines) releasing substantial heat, water and a salt that may be harmful.

廃棄物の処理

Dissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber. All federal, state, and local environmental regulations must be observed.