Composite semipermeable membrane and its manufacturing method

Title:

Composite semipermeable membrane and its manufacturing method

Document Type and Number:

Japanese Patent JP6295949

Kind Code:

B2

Abstract:

This composite semipermeable membrane provided with a substrate, a porous supporting layer formed on the substrate, and a separation functional layer formed on the porous supporting layer, wherein the separation functional layer has a crosslinked wholly aromatic polyamide as the main component and contains a carboxy group. Of the functional groups contained in the separation functional layer, the ratio (molar equivalent of carboxy groups) / (molar equivalent of amide groups) is 0.40 or greater, and the average of oxygen atom/nitrogen atom ratios on the front and back of the separation functional layer is 0.95 or less.

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Inventors:

Keisuke Yoneda
Shunsuke Tabayashi
Takashi Ogawa
Takao Sasaki
Masahiro Kimura

Application Number:

JP2014514972A

Publication Date:

March 20, 2018

Filing Date:

February 28, 2014

Export Citation:

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Assignee:

TORAY INDUSTRIES,INC.

International Classes:

B01D71/56; B01D69/10; B01D69/12; B01D71/52; C08J9/36

Domestic Patent References:

JP10066845A
JP2012135757A

Foreign References:

WO2012020680A1
WO2011105278A1

Attorney, Agent or Firm:

Patent business corporation glory patent office
Yuriko Hamada
Furudate Kutanko
Tomoko Yamazaki

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