Weakly acidic cation exchangers

Details Weakly acidic cation exchangers Weakly acidic cation exchangers

2007-07-03

2007-07-03

Zucker, Paul A. (Department: 1621)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S318000

Reexamination Certificate

active

11509984

ABSTRACT:
The present invention relates to a process for producing weakly acidic cation exchangers of the polymethacrylic acid type by alkaline saponification of a crosslinked copolymer of alkyl methacrylate and methacrylic acid.

REFERENCES:
patent: 2340111 (1944-01-01), D Alelio
patent: 2860109 (1958-11-01), Abel et al.
patent: 3586646 (1971-06-01), Corte et al.
patent: 3637535 (1972-01-01), Corte et al.
patent: 5175193 (1992-12-01), Heller et al.
patent: 2005/0090621 (2005-04-01), Happ et al.

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