Abstract: A method for controlling the deposition of stickies in pulping and papermaking processes comprises adding to fiber pulp or stock an additive comprising an organo-modified siloxane.

Abstract: A method for controlling the deposition of stickies in pulping and papermaking processes comprises adding to fibre pulp or stock an additive comprising an organo-modified siloxane comprising units of the formula: [R1aZbSiO(4-a-b)/2]n in which each R1 is independently selected from a hydrogen atom, an alkyl, aryl, alkenyl, aralkyl, alkaryl, alkoxy, alkanoyloxy, hydroxyl, ester or ether group, and each Z is independently selected from an alkyl group substituted with an amine, amide, carboxyl, ester, or epoxy group, or preferably at least one or more groups —R2—(OCpH2p)q(OCrH2r)S—R3; wherein n is an integer greater than 1; a and b are independently 0, 1, 2 or 3; R2 is an alkylene group or a direct bond; R3 is a group as defined for R1 or Z above; p and r are independently an integer from 1 to 6; q and s are independently 0 or an integer such that 1?q+s?400; and wherein each molecule of the organo-modified siloxane contains at least one group Z.