Alkylation of crosslinked polymers containing N or amino or...

Details Alkylation of crosslinked polymers containing N or amino or... Alkylation of crosslinked polymers containing N or amino or...

2006-12-12

2006-12-12

Harlan, Robert D. (Department: 1713)

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

Synthetic resins

Treating polymer containing material or treating a solid...

C526S236000

Reexamination Certificate

active

07148319

ABSTRACT:
The invention relates to a method for alkylating cross-linked polymers containing N- or amino, ammonium or spiro-bicyclic ammonium groups. According to said method, the gelated polymers, obtained by polymerization and cross-linking, are a) optionally, deprotonated in water, an organic solvent or in a mixture of an organic solvent and water, by adding a base, b) optionally, washed once or more with water, an organic solvent or a mixture of an organic solvent and water, then c) one or more alkylators are added to the gel suspension which is stirred in water, an organic solvent or in a mixture of an organic solvent and water, at a temperature of between 5 and 160° C. at normal or increased pressure, with a base being added after a short mixing time and d) reprotonation is carried out using a mineral acid, optionally after one or more washing steps, resulting in the alkylated, cross-linked polymers containing N- or amino, ammonium or spirobicyclic ammonium groups, accordingly.

REFERENCES:
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patent: 92/10522 (1992-06-01), None
patent: 95/34585 (1995-12-01), None
patent: WO 95/34585 (1995-12-01), None
patent: 00/32656 (2000-06-01), None
patent: 00/63259 (2000-10-01), None

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