Method of purifying covalently bonded polymer-dye compounds

Details Method of purifying covalently bonded polymer-dye compounds Method of purifying covalently bonded polymer-dye compounds

C - Chemistry, Metallurgy

09

B

C09B 62/465 (2006.01) C08F 6/00 (2006.01) C08F 6/28 (2006.01) C09B 67/54 (2006.01) C09B 69/10 (2006.01)

Patent

CA 2078400

Docket No. 32203 METHOD OF PURIFYING COVALENTLY BONDED POLYMER-DYE COMPOUNDS ABSTRACT OF THE DISCLOSURE The method of purifying a polymer containing a covalently bound dye indicator and unbound dye indicator includes covalently bonding a dye indicator material to a polymer, placing the polymer-dye reaction mass within a filtration container formed of a semi-permeable membrane permeable to the dye indicator, and exposing the reaction mass in the container to a solvent to filter the polymer- dye compound. The concentration of the unbound indicator material in the filtrate may be monitored, and the solvent washes may be repeated to obtain the desired purity of the polymer-dye compound.

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