Emulsifier system for rosin sizing agents
AssigneeHercules Incorporated
InventorRodrigue V. Lauzon
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Abstract
A dispersed rosin sizing composition comprising rosin stabilized by a cationic colloidal coacervate dispersing agent, the coacervate dispersing agent comprising an anionic component and a cationic component, the anionic and cationic components being present in a proportion such that the sizing composition has a zeta potential of at least about 20 millivolts. Methods of making and using the stable rosin sizing composition are also disclosed, as is sized paper made using the sizing composition.
Claims57
A dispersed rosin sizing composition comprising rosin stabilized by a cationic colloidal coacervate dispersing agent, the coacervate dispersing agent comprising an anionic component and a cationic component, the anionic and cationic components being present in a proportion such that the sizing composition has a zeta potential of at least about 20 millivolts.
A cationic colloidal coacervate dispersion composition comprising water, a lignosulfonate as an anionic component and poly(diallyldimethylammonium chloride) as a cationic component, the anionic and cationic components being present in such proportion that the composition is cationic and has a zeta potential of at least about 20 millivolts.
A method of making a cationic rosin sizing dispersion comprising rosin and a colloidal coacervate dispersing agent, the method comprising the steps:
- (a) forming a colloidal coacervate dispersing agent comprising an anionic component and a cationic component in water;
- and
- (b) forming an aqueous dispersion of rosin in the colloidal coacervate, the dispersion having a zeta potential of at least about 20 millivolts.
A method of producing sized paper comprising employing in the manufacture of the sized paper a sizing composition comprising rosin stabilized by a cationic colloidal coacervate dispersing agent, the coacervate dispersing agent comprising an anionic component and a cationic component, the anionic and cationic components being present in a proportion such that the sizing composition has a zeta potential of at least about 20 millivolts.
Dependencies are inferred from the claim text.