Styrene-divinylbenzene copolymer having both amino and phosphona

Details Styrene-divinylbenzene copolymer having both amino and phosphona Styrene-divinylbenzene copolymer having both amino and phosphona

1992-02-28

1993-05-18

Lipman, Bernard

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

Synthetic resins

Ion-exchange polymer or process of preparing

5253322, 525340, C08F 840

Patent

active

052122077

ABSTRACT:
A bifunctional styrene-divinylbenzene three-dimensional copolymer useful as an adsorbent of nitrate ion is disclosed. The copolymer contains phosphonate and amino groups of the following formulas: ##STR1## wherein R.sup.1 and R.sup.2 stand, independently from each other, for a hydrocarbyl group, and ##STR2## wherein R.sup.3 and R.sup.4 stand, independently from each other, for hydrogen or an alkyl group with the proviso that R.sup.3 and R.sup.4 do not represent hydrogen at the same time.

REFERENCES:
patent: 4271276 (1981-06-01), MaKarova
patent: 4442231 (1984-04-01), Kataoka et al.
patent: 4895905 (1990-01-01), Schneider et al.
patent: 5109074 (1992-04-01), Eiffler et al.

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