Surface sizing composition and method

摘要

A method for treating paper which comprises applying to the surface of the paper an aqueous medium containing a sizing composition consisting essentially of 75 to 99.9 wt % polyvinyl alcohol which is at least 95 mole % hydrolyzed and 0.1 to 25 wt % ketene dimer represented by the formula: <IMAGE> wherein R and R1 are the same or different hydrocarbyl groups having 8-30 carbon atoms.