The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 08, 1977
Filed:
Oct. 29, 1975
Eugene V Hort, Piscataway, NJ (US);
Earl P Williams, Pen Argyl, PA (US);
GAF Corporation, New York, NY (US);
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.