Styrene-divinylbenzene copolymer having both amino and phosphonate groups
AssigneeDirector-General of Agency of Industrial Science and Technology
InventorsYoshio Sato, Katsuo Murayama, Yoshihiro Nakai
Life of this patent
Estimating the term…
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.
Claims4
A three-dimensional polymer having a skeletal structure of a styrene-divinylbenzene three-dimensional copolymer and containing (a) phosphonate-containing groups directly bonded to the benzene rings of said skeletal structure and having the following formula:
- ##STR5## wherein R.sup.1 and R.sup.2 stand, independently from each other, for a hydrocarbyl group and (b) amino-containing groups directly bonded to the benzene rings of said skeletal structure and having the following formula:
- ##STR6## 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.
Dependencies are inferred from the claim text.