PROCESS FOR PRODUCING AN AQUEOUS SOLUTION OF PHOSPHORYLCHOLINE GROUP BEARING POLYMER AND AQUEOUS SOLUTION OF PHOSPHORYLCHOLINE GROUP BEARING POLYMER

WIPO Patent Application WO/1996/031566

A1

A process for producing an aqueous solution of a phosphorylcholine group bearing polymer, comprising polymerizing a polymerizable composition containing a phosphorylcholine group bearing monomer of general formula (1) in the presence of a nonmetallic polymerization initiator soluble in a water-containing medium to obtain a crude aqueous solution of a polymer and purifying the solution by the use of a separation membrane; and an aqueous solution of a phosphorycholine group bearing polymer produced by this process and having an impurity content of 2000 ppm. or below (X: a divalent organic residue; Y: C1-C6 alkyleneoxy; Z: H or R5-O-CO- (R5: C1-C10 alkyl or C1-C10 hydroxyalkyl); R1: H or CH3; R2, R3 and R4: H, C1-C6 hydrocarbyl or hydroxylated hydrocarbyl; and m: 0 or 1).

NAKABAYASHI NOBUO (JP)
ISHIHARA KAZUHIKO (JP)
SHUTO KENSHIRO (JP)
MATSUYAMA KAZUO (JP)

PCT/JP1996/000894

October 10, 1996

April 02, 1996

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NOF CORP (JP)
JAPAN RES DEV CORP (JP)
NAKABAYASHI NOBUO (JP)
ISHIHARA KAZUHIKO (JP)
SHUTO KENSHIRO (JP)
MATSUYAMA KAZUO (JP)

C08F6/00; C08F6/06; C08F30/02; (IPC1-7): C08L43/02; C08F6/06; C08F30/02

WO1993001221A1

1993-01-21

JPH0783923A	1995-03-31
JPH06313009A	1994-11-08
JPH06157270A	1994-06-03
JPH04304882A	1992-10-28
JPH04304882A	1992-10-28
JPH06157270A	1994-06-03
JPH05220218A	1993-08-31
JPS5463025A	1979-05-21
JPS58154591A	1983-09-14
JPS63222183A	1988-09-16
JPH05107511A	1993-04-30
JPH0641157A	1994-02-15

See also references of EP 0767212A4

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