ジビニルベンゼン (m-, p-混合物) 化学特性,用途語,生産方法
外観
無色～うすい黄色、液体
溶解性
水に難溶, エタノール, アセトン, ベンゼンに易溶。エタノール及びアセトンに極めて溶けやすく、水にほとんど溶けない。
用途
イオン交換樹脂、合成ゴム、イオン交換膜、MBS樹脂用、不飽和ポリエステル樹脂などスチレン系樹脂の架橋剤
用途
有機合成原料(樹脂等）。
化学的特性
A water-white to straw colored liquid. Slightly less dense than water and insoluble in water. Flash point below 141°F. Vapors may be toxic. Used in making rubber.
使用
Divinylbenzene is a specialty monomer used primarily to make cross-linked polystyrene resins. The largest use of divinylbenzene (DVB) [CAS: 1321-74-0] is in ion-exchange resins for domestic and industrial water softening. Ion-exchange resins are also used as solid acid catalysts for certain reactions, such as esterification. Divinylbenzene is manufactured by dehydrogenation of diethylbenzene, which is an internal product in the alkylation plant for ethylbenzene production.
一般的な説明
Divinylbenzene (DVB) consists of a combination of meta and para isomers of DVB and ethylvinylbenzene. It can be used as a monomer for the preparation of linear polydivinylbenzene by anionic polymerization.
空気と水の反応
Flammable. Insoluble in water.
反応プロフィール
Divinylbenzene may react vigorously with strong oxidizing agents. Can react exothermically with reducing agents (such as alkali metals and hydrides) to release gaseous hydrogen. May react exothermically with both acids and bases. May in the presence of various catalysts (such as acids) or initiators undergo exothermic polymerization. Inhibited by presence of an additive. When uninhibited violent polymerization may occur . Substitution at the benzene nucleus occurs by halogenation (acid catalyst), nitration, sulfonation, and the Friedel-Crafts reaction.
健康ハザード
Divinyl benzene is an irritant of
eyes, nose, and mucous membranes.
Mild respiratory irritation occurred in
workers exposed to 0.4–4ppm divinyl
benzene. Mild irritation was also reported
from skin and eye contact.
火災危険
Divinylbenzene is combustible.
安全性プロファイル
Mildly toxic by ingestion.
An eye irritant. Combustible. When heated to
decomposition it emits acrid smoke and irritating
fumes.
発がん性
Divinyl benzene was weakly genotoxic in
vivo, inducing a dose-dependent increase in
sister chromatid exchanges and an increase
in the frequency of chromosome aberrations in
male mice exposed at concentrations of up to
75ppm for 3 days.
The 2003 ACGIH threshold limit valuetime-
weighted average (TLV-TWA) for divinyl
benzene is 10ppm (53mg/m3).
純化方法
Purify divinylbenzene by dissolving in Et2O, shaking with H2O, drying over CaCl2, filtering, evaporating and distilling in vacuo. It polymerises within 2-3days unless 4-tertbutylcatechol (0.05%) is added as stabilizer. [Fries & Bestian Chem Ber 69 715 1936, Beilstein 5 III 1366.]
ジビニルベンゼン (m-, p-混合物) 上流と下流の製品情報
原材料
準備製品