Process for preparing physically stable quaternary ammonium anio

Details Process for preparing physically stable quaternary ammonium anio Process for preparing physically stable quaternary ammonium anio

1978-09-27

1980-06-10

Schofer, Joseph L.

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

Synthetic resins

Ion-exchange polymer or process of preparing

521 32, 525359, C08F 824, B01D 1504

Patent

active

042073987

ABSTRACT:
Crosslinked quaternary ammonium anion exchange resins having a copolymer backbone containing a major amount of units derived from at least one non-polar aromatic monovinyl monomer and a minor amount of units derived from at least one polar functionally substituted comonomer, and characterized by improved physical stability, are prepared by an improved process, wherein the improvement comprises haloalkylating the aromatic nuclei of the copolymer backbone and aminolyzing the intermediate copolymer in the absence of added organic solvent.

REFERENCES:
patent: 3311602 (1967-03-01), Raley, Jr.
patent: 3549562 (1970-12-01), Mindick et al.
patent: 3817878 (1974-06-01), Clemens et al.

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