Ion exchange/chelation resins containing dense star polymers hav

Details Ion exchange/chelation resins containing dense star polymers hav Ion exchange/chelation resins containing dense star polymers hav

1985-12-23

1989-10-03

Schofer, Joseph L.

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

Synthetic resins

Ion-exchange polymer or process of preparing

C08D 520

Patent

active

048717797

ABSTRACT:
Ion exchange resins and chelate resins are provided with ion exchange or chelate capability by depositing on an insoluble substrate dense star polymers having terminal group densities greater than conventional star polymers exhibiting greater and more uniform reactivity than their corresponding conventional star polymers. For example, a third generation, amine-terminated polyamidoamine dense star polymer prepared from ammonia, methyl acrylate and ethylenediamine having 1.24.times.10.sup.-4 amine moieties per unit volume (cubic Angstrom units) in contrast to the 1.58.times.10.sup.-6 amine moieties per unit volume contained by a conventional star polymer can be reacted with a chloromethylated styrene/divinyl copolymer (insoluble substrate) to form a desirably weak base anion exchange resin.

REFERENCES:
patent: 4031038 (1977-06-01), Grinstead et al.
patent: 4195138 (1980-03-01), Ward
patent: 4507466 (1985-03-01), Tomalia et al.
patent: 4558120 (1985-12-01), Tomalia et al.
patent: 4587329 (1986-05-01), Tomalia et al.

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