Preparation of alkylated N- or amino, ammonium or...

Details Preparation of alkylated N- or amino, ammonium or... Preparation of alkylated N- or amino, ammonium or...

2006-09-12

2006-09-12

Boykin, Terressa (Department: 1711)

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

Synthetic resins

Treating polymer containing material or treating a solid...

C504S345000, C564S296000

Reexamination Certificate

active

07105631

ABSTRACT:
Process for the preparation of alkylated N- or amino, ammonium or spirobicyclic ammonium group-containing, crosslinked polymer gels, which is characterized in thata) in the crosslinkage step an aqueous solution of a polymer obtained by polymerization of the corresponding monomer is adjusted to a pH of 7.5–14 at a temperature of 0 to 90° C., then the appropriate crosslinking agent is metered in and precrosslinkage is carried out with stirring and the precrosslinked polymer is transferred for complete curing to a curing container, whereuponb) the cured crude gel is cut into a defined shape, thenc) washed with methanol batchwise in a static or stirred bed and directly following thisd) in methanol, the alkylation is carried out, after which the alkylated gele) is first washed batchwise by means of methanol/NaCl washes in a static or stirred bed or continuously, thenf) batchwise by means of NaCl washes and final water washes with deionized water in a static or stirred bed or continuously and also a process for the preparation of the alkylators used in sted d).

REFERENCES:
patent: 4528184 (1985-07-01), Kurono et al.
patent: 5925379 (1999-07-01), Mandeville, III et al.
patent: 6096834 (2000-08-01), Tremont
patent: 909 768 (1999-04-01), None
patent: 02/22695 (2002-06-01), None

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