Diurethane latex and processes

Abstract

A sizing agent for paper consisting essentially of a latex consisting essentially of at least one diurethane dispersed in an aqueous medium, said diurethane being of the formula: ##STR1## in which: (a) R.sub.1, R.sub.2, R.sub.5 and R.sub.6 are each alkyl radicals and at least one of them possesses a minimum of 7 carbon atoms; (b) R.sub.7 and x represent, respectively, the cationic and anionic portions of the quaternizing agent R.sub.7 x; (c) R.sub.3 and R.sub.4 are selected from C.sub.2 -C.sub.4 alkylene radicals or polyalkoxylated radicals of a degree of polycondensation of between 1 an 4; and (d) Y is ##STR2## The process of making the sizing agent and using it to size paper are also disclosed.

Dependencies are inferred from the claim text.