Abstract: A cationic copolymer is prepared by first dissolving the total quantity of a suitable nonionic monomer in water. To this solution there is added up to about 95 mole percent of the total quantity of a suitable cationic monomer of greater reactivity than the nonionic monomer. The solution is then emulsified in a sufficient quantity of a hydrocarbon oil so as to provide a water-in-oil emulsion, with the water phase dispersed. Polymerization is then initiated with incremental additions of the withheld cationic monomer continuing throughout the copolymerization reaction. The resulting cationic copolymer exhibits a uniform distribution of cationic moieties along the polymer chain length which, in turn, has been shown to be a surprisingly more effective cationic copolymer when employed as a dewatering aid.

Abstract: Use of a cationic copolymer prepared by incremental addition of a cationic monomer during the polymerization reaction of a nonionic monomer in the drainage of formed paper provides improved performance characteristics.

Abstract: Use of quaternized Mannich bases of low molecular weight polyacrylamides is highly effective in clarifying coal wash waters.

Abstract: Use of quaternized Mannich bases of low molecular weight polyacrylamides is highly effective in clarification of iron ore slimes.

Abstract: Use of a low molecular weight polyacrylamide modified to provide quaternized dimethylaminomethyl groups in the clarification of raw water provides improved clarification.

Abstract: Homopolymer of compounds having the formula ##STR1## wherein n is 0 or 1, m is 1, X is an anion, R' is hydrogen, methyl or phenyl and R.sup.2, R.sup.3 and R.sup.4 are, individually, hydrogen, alkyl, aryl, alkaryl or aralkyl, polymers thereof are produced by melt cracking a compound having the formula ##STR2## wherein Z is ##STR3## wherein Y is hydroxyl or RO, R being alkyl, aryl or aralkyl, and R.sup.1 -R.sup.4, n, m and X are as set forth above.

Abstract: Compounds having the formula ##STR1## wherein n and m are, individually, 0 or 1, X is an anion, R' is hydrogen, methyl or phenyl and R.sup.2, R.sup.3 and R.sup.4 are, individually, hydrogen, alkyl, aryl, alkaryl or aralkyl, polymers thereof and methods for their production, are disclosed.

Abstract: Compounds having the formula ##STR1## wherein R.sup.1 is hydrogen or methyl and R.sup.2 , R.sup.3 and R.sup.4 are, individually, hydrogen, alkyl (C.sub.1 -C.sub.4), aryl (C.sub.6 -C.sub.10), aralkyl (C.sub.7 -C.sub.11) or alkaryl (C.sub.7 -C.sub.11) are prepared by heating hydroxyethyl or hydrocarbyloxyethyl imidazolines at 275.degree.-500.degree. and in the presence of a catalyst. Salts are also prepared.