Process for preparation of quaternized cationic vinyllactam-acry

Details Process for preparation of quaternized cationic vinyllactam-acry Process for preparation of quaternized cationic vinyllactam-acry

1975-10-29

1977-11-08

Levin, Stanford M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

162168NA, 210 54, 260 296H, 526264, C08F 832, C08F 834

Patent

active

040575330

ABSTRACT:
A composition of matter which is useful as a flocculant for aqueous dispersions containing suspended solid particles and as a filler retention aid in paper-making, consisting essentially of quaternized cationic vinyllactam-acrylamide copolymer containing the following recurring units in a random distribution: ##STR1## wherein R is selected from the group consisting of hydrogen, methyl and ethyl; R.sub.1 is selected from the group consisting of hydrogen and methyl; R.sub.2 and R.sub.3 are selected from the group consisting of alkyl of 1 to 4 carbon atoms, hydroxyalkyl of 1 to 4 carbon atoms and together may represent the residue of a cyclic secondary amine, e.g., morpholine; R.sub.4 is selected from the group consisting of alkyl of 1 to 6 carbon atoms or benzyl radicals (10-100%) and hydrogen (0-90%); and X represents an anion such as chloride, bromide, sulfate, methyl sulfonate, etc.; and Z is selected from the group consisting of hydrogen and the group ##STR2## wherein R.sub.2, R.sub.3 and R.sub.4 are as defined above; n is a positive integer of from 1 to 3; a represents a range of 30 to 95% by weight of the lactam moiety in said copolymer; b represents a range of 5 to 70% by weight of the acrylamide moiety in said copolymer; and the relative viscosity of said copolymer is from about 5 to about 50 as measured using 1 gram of copolymer in solution in 100 ml. of water at 25.degree. C., and the process of making and using same.

REFERENCES:
patent: 2980657 (1961-04-01), Melamed
patent: 3406155 (1968-10-01), Azorlosa et al.

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