【発明の名称】多孔性膜

Title:

【発明の名称】多孔性膜

Document Type and Number:

Japanese Patent JP2981770

Kind Code:

B2

Abstract:

A method of making a porous polymeric material by heating a mixture of a thermoplastic polymer and a cationic or non-ionic surfactant having a hydrophilic-lipophilic balance range of 4.0 to 6.0 to a temperature and for a time sufficient for the polymer and surfactant to mutually dissolve. The mixture is then cooled to a temperature so that non-equilibrium liquid-liquid phase separation takes place to form a bi-continuous matrix of the polymer and surfactant so that the polymer and surfactant form two intermingled separate phases of large interfacial surface area. The surfactant is then removed from the polymer. The porous polymeric material produced by the above method has a lacey or filamentous structure consisting of a plurality of polymer strands connected together at spaced apart locations along each strand.

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Inventors:

FUOODO DAGURASU RIONSU
KOTSUPU KURINTON BAAJIRU
SUTORIITON ROBAATO JON UIRIAMU

Application Number:

JP50048090A

Publication Date:

November 22, 1999

Filing Date:

November 10, 1989

Export Citation:

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Assignee:

MENTEITSUKU LTD

International Classes:

B01D67/00; B01D69/08; B01D71/26; B29C47/00; C08J9/28; D01D5/24; D01F2/28; D01F6/00; D01F6/06; (IPC1-7): B01D67/00; B01D71/26; C08J9/28; D01D5/24; D01F6/00; D01F6/06

Domestic Patent References:

JP2284633A
JP5656202A
JP1223137A
JP62106808A
JP63161035A
JP5330668A
JP6335726B2
JP5018512B1

Other References:

【文献】米国特許3378507(US,A)

Attorney, Agent or Firm:

Akira Kono

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