Polymer containing chelating groups, process for preparing it an

Details Polymer containing chelating groups, process for preparing it an Polymer containing chelating groups, process for preparing it an

1992-12-18

1994-10-18

Zitomer, Fred

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

5253288, 5253289, 5253323, 5253324, 5253327, 5253334, 5253335, 5253336, 525384, 525385, C08F 834, C08F 832, C08F 838, C08F 826

Patent

active

053570022

ABSTRACT:
Water insoluble polymers containing hydrophilic pendant moieties ending with a chelating group are disclosed. The polymers are useful in the purification of water polluted by heavy metals such as mercury and lead. The polymers have the general formula P--(--(--O--R).sub.n --(NH--Q).sub.p --F).sub.m where P is a polymeric matrix capable of reacting with a polyalkylene glycol or an alkylene oxide having such a structure and molecular weight as to be insoluble in water; R is either --CH.sub.2 CH.sub.2 -- or mixtures of --CH.sub.2 CH.sub.2 -- and --CH.sub.2 CH(CH.sub.3)--, with the molar ratio of both units in the mixture being at least 3:1; n is 3 to 50; m is a numeral such that the % by weight of all of the --(--(--O--R--).sub.n (NH--Q).sub.p --F hydrophilic chains is higher than 1% by weight of the total weight of (I); Q is a C.sub.2 -C.sub.6 difunctional aliphatic or aromatic hydrocarbon radical; p is 0 or 1; F is a chelating group selected from dithiocarbamate and methyl-thiourea when p is 1, or from thiol and isothiouronium when p is 0.

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