EMULSIFIER, SIZING METHOD OF PAPER DUE TO SAID EMULSIFIER AND IMPARTING OF WATR REPELLENCY TO PAPER SURFACE

摘要

A nonionic emulsifier useful for forming a stable aqueous emulsion of a hydrocarbyl-substituted succinic anhydride is the reaction product of: (a) a hydrocarbyl-substituted succinic anhydride having from 6 to 50 carbon atoms in the hydrocarbyl substituent; and (b) a nonionic water-soluble compound having from 1 to 3 reactive polar groups, said water-soluble compound having sufficient hydrophilic strength to give a balanced oil-in-water emulsifier; wherein the emulsifier so produced contains a free carboxyl group and a substituted carboxyl group per each reacted anhydride molecule. Aqueous emulsions formed from hydrocarbyl-substituted succinic anhydrides and the nonionic emulsifier can be used to render surfaces water repellent and in particular can be used as sizing agents for cellulose stocks in the production of paper.