METHOD OF TREATING CELLULOSIC MATERIAL TO IMPROVE THE USEFULNESS THEREOF AS AN INSULATOR IN ELECTRICAL APPARATUS

摘要

A method of increasing the dimensional stability of cellulosic material by impregnating the cellulose with a composition including a cellulose swelling agent and a compound capable of crosslinking with the cellulose molecules. The swelling agent is capable of swelling the cellulose beyond its full water swollen condition and the crosslinking compound crosslinks with the cellulose molecules to thereby reduce the number of potential water absorbing sites and render the cellulose more dimensionally stable.