Biopolymer sizing agents
AssigneeSolenis Technologies, L.P.
InventorsSusan M Ehrhardt, Daniel F Varnell
Life of this patent
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Abstract
A composition and method for imparting paper and paperboard with resistance to aqueous penetrants using renewable biopolymers, and the resulting paper and paperboard, are disclosed. The renewable biopolymers when combined with water-soluble, hydroxylated polymers or water-soluble salts and applied to the surface of paper or paperboard, results in resistance to aqueous penetrants.
Claims10
A composition for treating the surface of a paper product comprising:
- a water-soluble, hydroxylated polymer provided the hydroxylated polymer is not a cationic starch;
- and
- an alkaline solution or dispersion of isolated lignin that is only soluble under alkaline conditions;
- wherein the composition has a pH of from about 7 to about 11;
- and wherein the composition is applied to the surface of the paper product providing the paper product resistance to aqueous penetrants.
A composition for treating the surface of a paper product comprising:
- a. a water-soluble zirconium or aluminum salt selected from the group consisting of ammonium zirconium carbonate (AZC), ammonium zirconium sulfate, ammonium zirconium lactate, ammonium zirconium glycolate, zirconium oxynitrate, zirconium nitrate, zirconium hydroxychloride, zirconium orthosulfate, zirconium acetate, potassium zirconium carbonate, sodium aluminate, potassium aluminate and combinations thereof, and
- b. an alkaline solution or dispersion of non-sulfonated lignin or lignin that is only soluble under alkaline conditions;
- wherein the composition has a pH of from about 7 to about 11;
- and wherein the composition is applied to the surface of the paper product thereby providing resistance to aqueous penetrants.
A composition for treating the surface of a paper product comprising:
- a. one or more of a sizing agent selected from the group consisting of salts of styrene maleic anhydride polymers, styrene acrylic acid polymers, ethylene acrylic acid polymers, methacrylic acid polymers, and anionic styrene acrylic latex;
- and
- b. an alkaline solution or dispersion of isolated lignin that is only soluble under alkaline conditions;
- wherein the composition provides resistance to aqueous penetrants;
- wherein the composition has a pH of from about 7 to about 11;
- and the composition is applied to the surface of a paper product.
A composition for treating the surface of a paper product comprising:
- a water-soluble, hydroxylated polymer provided the hydroxylated polymer is not a cationic starch;
- and
- an alkaline solution or dispersion of non-sulfonated lignin or lignin that is only soluble under alkaline conditions;
- and
- a water-soluble zirconium or aluminum salt;
- wherein the composition is applied to the surface of the paper product providing the paper product resistance to aqueous penetrants.
Dependencies are inferred from the claim text.