Water-soluble cationic copolymers and their use as flocculants a

Details Water-soluble cationic copolymers and their use as flocculants a Water-soluble cationic copolymers and their use as flocculants a

1995-09-06

1997-10-28

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526263, 526291, C08F 2054

Patent

active

056819129

ABSTRACT:
A water-soluble cationic copolymer having the general formula: ##STR1## wherein Z represents --C(.dbd.O)O(CH.sub.2).sub.n N.sup..sym. R.sup.4 R.sup.5 R.sup.6 X.sup..crclbar., --C(.dbd.O)NH(CH.sub.2).sub.n N.sup..sym. R.sup.4 R.sup.5 R.sup.6 X.sup..crclbar., ##STR2## or residual groups of --CH.sub.2 N.sup..sym. (R.sup.4 R.sup.5)CH.sub.2 CH.dbd.CH.sub.2 X.sup..crclbar. or mixtures thereof, and n is 1 to 5; R.sup.1, R.sup.2 and R.sup.3 are independently selected from the group consisting of H or C.sub.1 to C.sub.3 alkyl; R.sup.4, R.sup.5 and R.sup.6 are independently C.sub.1 to C.sub.3 alkyl; and X is a halide, hydroxyl or alkylsulfate anion; and wherein x, y, and q represent molar percents of monomeric units in the copolymer such that q is 1 to 99 mol %, and the molar ratio of x to y is from 0 to 10.
The copolymers of this invention are useful as flocculating agents and as drainage/retention aids in pulp and papermaking operations.

REFERENCES:
patent: 4421602 (1983-12-01), Brunnmueller et al.
patent: 4880497 (1989-11-01), Pfohl et al.
patent: 4978427 (1990-12-01), Pfohl et al.
patent: 5225088 (1993-07-01), Moench et al.
PCT Notification of Transmittal of the International Search Report for PCT/US96/05172 Dated Sep. 11, 1996.
PCT International Search Report with Annex for PCT/US96/05172 Dated Sep. 11, 1996.

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