Polyfunktionelle Polymere als Mittel zum Deinken

摘要

This invention presents a series of polyfunctional polymers useful as deinking agents. The polymers, which generally have molecular weights in the 2,000-100,000 range, can be used to effectively separate and remove ink in a variety of deinking processes, including flotation, wash, and mechanical, resulting in fibers of superior brightness. One particular deinking agent comprises a polyfunctional polymer of the formula wherein: R1 = H, C2-C8 alkyl, or - @-O<->; R2 = C1-C12 alkyl or - @-O-; R3 = H, or branched or straight chain C1-C22 alkyl or alkylphenol R4 is H or C1-C4 alkyl; A = &lparstr& -CH2-CH2-O &rparstr& ; (wherein R5 is C1-C4 alkyl or phenyl); W, Y = H or C1-C4 alkyl; and (wherein: M is ammonium or alkali metal, R6 is C1-C4 alkyl, and x is an integer of at least 1); or (wherein M is ammonium or alkali metal); a and b are positive integers of at least 1; n is a positive integer of 10-100; and m is a positive integer of 0-50.