| 摘要 |
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: <IMAGE> wherein R is selected from the group consisting of hydrogen, methyl and ethyl; R1 is selected from the group consisting of hydrogen and methyl; R2 and R3 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; R4 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 <IMAGE> wherein R2, R3 and R4 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 DEG C., and the process of making and using same.
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