Papermaking process comprising the use of a polymer

摘要

Disclosed is a process of making paper by providing a cellulosic suspension comprising cellulosic fibres and optionally fillers, dewatering the cellulosic suspension on a wire or mesh to form a sheet and drying the sheet in which a polymeric additive is included in the process, in which the polymeric additive is a polymer comprising an ethylenically unsaturated water-soluble or potentially water-soluble monomer and an ethylenically unsaturated monomer carrying a reactive group in which the reactive group is an epoxide group and the polymer has a weight average molecular weight of below one million. Also disclosed is a polymer which has been formed from a monomer blend comprising at least one water-soluble or potentially water-soluble ethylenically unsaturated monomer and up to 10 mole% of a glycidyl monomer which is an ethylenically unsaturated monomer that carries a glycidyl group, wherein the polymer has a weight average molecular weight of below one million. Also disclosed is the use of the above polymer as a dry strength additive, a wet strength additive, an internal sizing agent, or a surface sizing agent in a paper making process.