Toyo Soda Manufacturing Co., Ltd.

Syotaro Ohno

Kenji Koyama

Mitsutoshi Fukuda

Teruo Fujimoto

Mitsuru Nagasawa

Plasma albumin is separated by a crude albumin fraction from blood plasma by a rough fractional separation and then separating plasma albumin through an ultrafiltration membrane. The ultrafiltration membrane is a membrane made of a polysulfone resin having the formula ##STR1## (n=50 to 250).

Process for separating plasma albumin

A ternary block copolymer and a method for manufacturing it. The copolymer has a molecular structure consisting of a macro-molecule having a cation exchange group, a macro-molecule having an anion exchange group and another macro-molecule which does not have any ion exchange group. These macro-molecules are linked together into a straight chain.

Method for manufacturing block copolymer

.gamma.-Globulin aggregate is separated by a membrane from an aqueous solution of .gamma.-globulin through an ultrafiltration membrane. The ultrafiltration membrane is a membrane made of a polysulfone resin having the formula ##STR1##

Process for separating .gamma.-globulin aggregate by polysulfone membrane

A porous synthetic resin film which comprises fine cylindrical holes of from 70 to 2,000 A in diameter which are formed by removing the fine cylindrical component of an AB-type or an ABA-type block copolymer.

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Tokuyama, Japan

Syotaro Ohno