Grafted methylenediphosphonate ion exchange resins

Details Grafted methylenediphosphonate ion exchange resins Grafted methylenediphosphonate ion exchange resins

1997-04-03

1998-01-27

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...

521 30, 521 32, 521 33, 521 34, 525403, 525538, C08F 840, C08G 7904

Patent

active

057123470

ABSTRACT:
An ion exchange resin is disclosed that is comprised of an insoluble copolymer onto which are grafted pendent groups that provide 1.0 to about 10 mmol/g dry weight phosphorous. The pendent groups have the formula ##STR1## wherein R is hydrogen, a cation or mixtures thereof; and R.sup.1 is hydrogen or an C.sub.1 -C.sub.2 alkyl group. The resin also contains zero to about 5 mmol/g dry weight of pendent aromatic sulfonate groups. Processes for making and using an ion exchange-resin are also disclosed.

REFERENCES:
Sundell et al, Reactive Polymers, 25:1-16 (1995).

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