An organic coagulant composition for treating coated broke

摘要

Coated broke is treated with an organic coagulant composition comprising preferably a branched polyamine and a copolymer comprising an acrylamide and a DADMAC in a preferred weight percent ratio of 50 to 50 based on the weight of the copolymer. The weight ratio of the branched polyamine to the copolymer ranges from 1:4 to 4:1 in a blended composition which is added to the coated broke slurry so the white pitch attaches to the fiber in the furnish thereby reducing the tendency for the coating binders and pigments of the coated broke to accumulate resulting in deposits on the paper making machinery which ultimately can result in defects in the formed paper. The average weight molecular weight of the branched polyamine and the DADMAC ranges from 500,000 to 7 million and that of the acrylamide is from 3 to 7 million.