Anionic functional promoter and charge control agent
AssigneeLANXESS Corporation
InventorsMichael Ryan, William Brevard, Sr., David Dauplaise, Michael Lostocco, Robert Proverb, David Wesley Lipp
Life of this patent
Estimating the term…
Abstract
The invention relates to a functional promoter comprising a water-soluble anionic polymer having a molecular weight of at least about 50,000 daltons and a molecular weight charge index value of at least about 10,000, and a cationic strength component. The invention also relates to a paper product made with such a system, and method for imparting wet strength to a paper product with the functional promoter.
Claims33
A composition comprising a wet-strength enhancing amount of (a) a functional promoter comprising a water-soluble anionic polymer having a molecular weight ranging from at least about 50,000 daltons to about 500,000 daltons and a molecular weight charge index value of at least about 10,000, and (b) polyamide strength resin component;
- wherein when functional promoter is used in conjunction with the polyamide strength resin component in a pulp slurry during a papermaking process, the resulting composition imparts improved wet strength to a paper product made by the papermaking process as compared to when the polyamide strength resin component is used in conjunction with a water-soluble anionic polymer that does not have a molecular weight that is at least about 50,000 daltons and a molecular weight charge index value that is at least about 10,000.
A paper product comprising the reaction product of:
- (a) a polyamide strength resin component,
- (b) a fibrous substrate component, and
- (c) a functional promoter comprising a water-soluble anionic polymer having a molecular weight ranging from at least about 50,000 daltons to about 500,000 daltons and a molecular weight charge index value of at least about 10,000;
- wherein when functional promoter is used in conjunction with the polyamide strength resin agent in a pulp slurry during a papermaking process, the resulting composition imparts improved wet strength to a paper product made by the papermaking process as compared to when the the polyamide strength resin component is used in conjunction with a water-soluble anionic polymer that does not have a molecular weight that is at least about 50,000 daltons and a molecular weight charge index value that is at least about 10,000.
A method for making a paper product comprising
- (1) adding to a pulp slurry containing a fibrous substrate component a composition comprising:
- (a) a functional promoter comprising a water-soluble anionic polymer having a molecular weight of at least about 50,000 daltons to about 500,000 daltons and a molecular weight charge index value of at least about 10,000, and
- (b) a polyamide strength resin component, and
- (2) forming a paper product from the slurry,
- wherein the composition imparts improved wet strength to the paper product made as compared to when the polyamide strength resin component is used in conjuncture with a water-soluble anionic polymer that does not have a molecular weight that is at least about 50,000 daltons and a molecular weight charge index value that is at least about 10,000.
Dependencies are inferred from the claim text.