Prearation of composite perrmeable membrane for separating gas

Abstract

Abstract PURPOSE:To prepare a composite permeable membrane for reparating a gas, which has high gas permeability and undergoes rapid membrane forming reaction, by contacting a membrane substrate, obtained by coating a porous support membrane with siloxane diisocyanate, with vapor containing a polyamino compound. CONSTITUTION:A membrane substrate obtained by coating a porous support membrane with siloxane dissocyanate, wherein at least 50mol% of the total polyisocyanate component is represented by formulae I and/or II, is contacted with vapor containing a polyamino compond having at least two primary and/or secondary amino groups to form an ultra-thin membrane on said support membrane. The polyamino compound is usually liquid or a low m.p. one and includes, e.g. ethylenediamine and propylenediamine.

Inventors

• 👤 Kenko Yamada
• 👤 山田　建孔
• 👤 Fumio Ueda
• 👤 文雄 上田
• 👤 Eiichi Hashimoto
• 👤 橋本　「えい」一
• 👤 Ko Mori
• 👤 森　興

Bibliographic Details