PAPERMAKING ADDITIVE WITH PRIMARY AMINO GROUPS AND MECHANICAL PULP TREATED THEREWITH

摘要

A graft polymer comprises a carbohydrate polymer having pendant 3-amino-2- hydroxy propyl groups grafted thereon and may be employed as a retention aid and strengthening additive in paper manufacture. When the carbohydrate polym er is a component of wood pulp the resulting chemically modified wood pulp may be employed in conjunction with unmodified wood pulp to incorporate therein the retention and strengthening characteristics.