Modified rosin emulsion
AssigneeInternational Paper Company
InventorsYan C. Huang, M. Bruce Lyne, John H. Stark
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Abstract
The invention disclosed herein is directed to a modified rosin emulsion, to methods for making the modified emulsion and to uses for the emulsion. The modified emulsion of the invention is made by mixing emulsified rosin solids with a water soluble salt of an alkylene-acrylic acid copolymer.
Claims8
A method for making a sizing agent for paper which comprises mixing water, a cationic rosin emulsion containing from about 30 to about 35 wt. % cationic rosin solids and from about 1 to about 6% by weight relative to the rosin solids in the modified rosin emulsion of a water soluble salt of a poly(alkylene-acrylic acid) copolymer under high shear mixing conditions to provide a modified cationic rosin emulsion containing from about 20 to about 25 percent by weight cationic rosin solids and mixing the modified cationic emulsion with a starch solution to provide a surface size agent.
Dependencies are inferred from the claim text.