2-ブチル-2-エチル-1,3-プロパンジオール

外観

白色～わずかにうすい黄色、結晶～結晶性粉末または塊

定義

本品は、次の化学式で表される二価アルコールである。

化粧品の成分用途

保湿.湿潤剤

化学的特性

white crystalline powder

使用

2-Butyl-2-ethyl-1,3-propanediol was used in the synthesis of polyesters.

調製方法

2-Butyl-2-ethyl-1,3-propanediol (BEPD) is produced either by the salt-free procedure based on aldol addition followed by hydrogenation or by the classical combination of hydroxymethylation catalyzed by alkali hydroxides and Cannizzaro-type disproportionation with formaldehyde. The reaction is very exothermic and rapid and can be controlled by the addition rate of the base catalyst. The raw material, 2-ethylhexanal, is produced from n-butyraldehyde by aldol condensation and selective hydrogenation steps which increases the production cost of BEPD compared to, e.g., neopentyl glycol. The world production of 2-butyl-2-ethyl-1,3-propanediol is estimated at about 10 000 t/a; the producers are Chisso, Kyowa Hakko, and Perstorp.

一般的な説明

2-Butyl-2-ethyl-1,3-propanediol undergoes bulk polycondensation with diacid monomer (terephthalic acid) to yield poly(ethylene terephthalate) copolymers.