Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Ion-exchange polymer or process of preparing
Patent
1979-02-22
1980-11-04
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Ion-exchange polymer or process of preparing
525374, 525332, C08C 1922, C08F 830
Patent
active
042321255
ABSTRACT:
A cross-linked polymer of a monovinylidene aromatic compound is diacylaminoalkylated by contacting said polymer with an aldehyde and a diacylamine in the presence of an acid catalyst. The resulting diacylaminoalkylated polymer is readily hydrolyzed to an aminoalkylated form which is useful as a weak base ion exchange resin and as a precursor in the preparation of other ion exchange resins. For example, reacting a cross-linked polystyrene with paraformaldehyde and phthalimide in the presence of sulfuric acid and subsequently hydrolyzing the reaction product forms a cross-linked poly(aminomethyl styrene) useful as a weak base ion exchange resin and as a precursor in the preparation of strong base or chelate type resins.
REFERENCES:
patent: 3006866 (1961-10-01), Corte et al.
patent: 3791996 (1974-02-01), Wrichter
patent: 3925264 (1975-12-01), Corte et al.
patent: 3989650 (1976-11-01), Fonge et al.
patent: 4077918 (1978-03-01), Corte et al.
Berichte der Dt. Chem. Gesellschaft 31 (1898) 1232.
Kulkosky Peter F.
Schofer Joseph L.
The Dow Chemical Company
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