1
Takeyuki Kawaguchi, Hiroyoshi Minematsu, Yuzuru Hayashi, Shigeyoshi Hara: Process for preparation of improved semipermeable composite membranes. June 14, 1983: US04388189 (91 worldwide citation)

In a process for producing a semipermeable composite membrane which comprises forming on a microporous substrate a thin layer of a polymeric material comprising a polyamino polymer containing at least 1 milliequivalent, per gram of the polymer in the dry state, of active amino groups selected from p ...


2
Takeyuki Kawaguchi, Yutaka Taketani, Noriaki Sasaki, Hiroyoshi Minematsu, Yuzuru Hayashi, Shigeyoshi Hara: Semipermeable composite membrane. Teijin, Wenderoth Lind & Ponack, November 24, 1981: US04302336 (87 worldwide citation)

A semipermeable composite membrane comprising a thin semipermeable film of a polymeric material deposited on one side of a microporous substrate, said polymeric material being prepared by crosslinking a soluble polymer containing at least 30 mole % of a recurring unit of the formula ##STR1## wherein ...


3
Shigeyoshi Hara, Yuzuru Hayashi, Takeyuki Kawaguchi, Noriaki Sasaki, Yutaka Taketani, Hiroyoshi Minematsu: Semipermeable composite membrane. Teijin, Sughrue Mion Zinn Macpeak & Seas, October 12, 1982: US04353802 (75 worldwide citation)

A semipermeable composite membrane comprising a thin semipermeable film of a polymeric material deposited on one side of a microporous substrate, the polymeric material being prepared by crosslinking a soluble polymer containing at least 30 mole % of a recurring unit of the formula ##STR1## wherein ...


4
Takeyuki Kawaguchi, Hiroyoshi Minematsu, Yuzuru Hayashi, Shigeyoshi Hara, Fumio Ueda: Amphoteric ion-permeable composite membrane. Teijin, Wenderoth Lind & Ponack, November 23, 1982: US04360434 (45 worldwide citation)

An amphoteric ion-permeable composite membrane composed of a microporous substrate, and supported on the substrate, a thin amphoteric ion-exchange film formed of an active amino group-containing polymer which has been interfacially crosslinked at least at the surface portion of the thin film, said m ...


5
Takeyuki Kawaguchi, Yutaka Taketani, Yuzuru Hayashi, Tomoyoshi Ono, Koh Mori: Permselective membrane. Teijin, Sherman & Shalloway, May 5, 1981: US04265745 (26 worldwide citation)

A permselective membrane comprising a thin permselective film of a polymeric material, said polymeric material being prepared by cross-linking a polyaddition product between a polyepoxy compound and a polyamino compound having at least two amino groups capable of reacting with epoxy groups with a po ...


6
Takeyuki Kawaguchi, Yutaka Taketani, Hiroyoshi Minematsu, Noriaki Sasaki, Yuzuru Hayashi, Shigeyoshi Hara: Semipermeable composite membrane and process for preparation thereof. Teijin, Wenderoth Lind & Ponack, December 30, 1980: US04242208 (21 worldwide citation)

A semipermeable composite membrane comprising a thin semipermeable film of a polymeric material deposited on one side of the microporous substrate, said polymeric material being prepared by interfacial crosslinking of a polymer containing a recurring unit of the formula ##STR1## wherein each of R.su ...


7
Yutaka Taketani, Yuzuru Hayashi, Takeyuki Kawaguchi, Tomoyoshi Ono, Ko Mori: Preparation of permselective composite membrane. Teijin, Sherman & Shalloway, April 7, 1981: US04260652 (12 worldwide citation)

A process and composition for producing a permselective composite membrane. The process comprises dissolving a specified imidazolone ring-containing aromatic polymer in an aqueous liquid medium containing a water-miscible amine having a pKa of more than 5.0 in a concentration of at least 5% by weigh ...



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