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US 6,268,414 B1Granted
Paper sizing composition
AssigneeHercules Incorporated
InventorTingdong Lin
Life of this patent
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Abstract
Paper sizing compositions comprising (a) cellulose-reactive size, (b) dispersant system comprising primary anionic dispersant, and secondary dispersant selected from cationic and/or non-ionic dispersant, and (c) inorganic salt.
Claims72
An aqueous composition comprising:
- cellulose-reactive size;
- dispersant system comprising sodium lignosulfonate having less than about 5.9 wt % sulfonate sulfur based on the total weight of the sodium lignosulfonate, and at least one of cationic dispersant and non-ionic dispersant;
- and
- at least one salt containing at least one metal element.
1 more element
An aqueous composition comprising:
- cellulose-reactive size;
- dispersant system comprising anionic dispersant and at least one of cationic dispersant and non-ionic dispersant;
- and
- at least one salt containing at least one metal element, wherein the salt is present in an amount such that the at least one metal element is present in an amount equivalent to, or greater than, about 5.5 wt % aluminum, based on the weight of cellulose-reactive size.
1 more element
An aqueous composition comprising:
- at least one of ketene dimer and ketene multimer,
- dispersant system comprising hydrophobic sodium lignosulfonate and cationically modified starch;
- and
- aluminum sulfate.
1 more element
An aqueous composition for sizing a paper product, produced by combining cellulose-reactive size;
- dispersant system comprising anionic dispersant and at least one of cationic dispersant and non-ionic dispersant;
- and
- at least one salt containing at least one metal element, wherein the salt is present in an amount such that the at least one metal element is present in an amount greater than, or equivalent to, 5.5 wt % aluminum, based on the weight of cellulose-reactive size.
A method for sizing a cellulose-based product, comprising adding:
- cellulose-reactive size;
- dispersant system comprising anionic dispersant and at least one of cationic dispersant and non-ionic dispersant;
- and
- at least one salt containing at least one metal element, wherein the salt is present in an amount such that the at least one metal element is present in an amount greater than, or equivalent to, 5.5 wt % aluminum, based on the weight of cellulose-reactive size,
- to cellulosic material.
2 more elements
A kit comprising for sizing a cellulose-based product, the kit comprising:
- cellulose-reactive size;
- dispersant system comprising anionic dispersant and at least one of cationic dispersant and non-ionic dispersant;
- and
- at least one salt containing at least one metal element, wherein the salt is present in an amount such that the at least one metal element is present in an amount greater than, or equivalent to, 5.5 wt % aluminum, based on the weight of cellulose-reactive size.
1 more element
Dependencies are inferred from the claim text.