Method for producing aqueous solution of polymer having phosphorylcholine groups
US6204324A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Dec 2, 1996 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | Dec 2, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F6/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for producing an aqueous solution of a polymer having a phosphorylcholine group in which a polymerizable composition containing a polymerizable monomer having the phosphorylcholine group represented by the formula (1) is polymerized in the presence of a non-metal polymerization initiator soluble in a water-containing medium, to obtain a crude polymer aqueous solution, and the crude polymer aqueous solution is purified with a separation membrane, and an aqueous solution of the polymer having the phosphorylcholine group obtained by the method and having not more than 2000 ppm of impurities. ##STR1## (X: a divalent organic residue, Y: an alkyleneoxy group having C1 to 6, Z: H, R.sup.5 --O--CO--(R.sup.5 : an alkyl group of C1 to 10), R.sup.1 :H, CH.sub.3, R.sup.2, R.sup.3, R.sup.4 : H, a hydrocarbon group or a hydroxy substituted hydrocarbon group of C1 to 6, m; 0 or 1)
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.