TREATMENT OF WASTE PRINTED PAPERS WITH SURFACE ACTIVE POLYMERIC COMPOSITIONS FOR IMPROVED RECYCLABILITY

摘要

This invention relates to a treatment process of wastepaper for making printing grade paper from newsprints and officewastes using surface active polymer composition including a novel surface active terpolymer. In particular, the invention is concerned with a process for removing ink from an aqueous pulp slurry by treating the pulp with a surface active polymer composing of two to three comonomers in which at least one is a hydrophobe and another is a hydrophil, having a glass transition temperature ranging from about 105.degree.C to about 170.degree.C, alkali metal salts of the said surface active polymer and the combination of the said surface active polymer with a fatty oil alkoxy derivative or fatty acid soaps.