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US 8,557,925 B2Granted
Blends of anionic copolymers suitable for surface size and methods of making the same
AssigneeGeorgia-Pacific Chemicals LLC
InventorsCornel Hagiopol, James W. Johnston, Sean M. Tyler, Michael J. Bush
Life of this patent
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Abstract
A sizing composition comprises a blend of at least two anionic copolymers.
Claims21
A sizing composition comprising a blend of an anionic styrene-maleic acid copolymer and an anionic ethylene-acrylic acid copolymer, wherein the anionic ethylene-acrylic acid copolymer is present in an amount of about 5 weight percent to about 45 weight percent, based on a combined weight of the anionic styrene-maleic acid copolymer and the anionic ethylene-acrylic acid copolymer.
A sizing composition comprising:
- a blend of a styrene-maleic acid copolymer and an ethylene acrylic acid copolymer, wherein the styrene-maleic acid copolymer comprises about 50 weight percent to about 85 weight percent styrene, the styrene-maleic acid copolymer has a molecular weight of about 5,000 to about 200,000, and the ethylene acrylic acid copolymer has a molecular weight of about 2,000 to about 250,000 and comprises about 5 weight percent to about 45 weight percent acrylic acid, and wherein the ethylene acrylic acid copolymer is present in an amount of about 5 weight percent to about 45 weight percent, based on a combined weight of the styrene-maleic acid copolymer and the ethylene acrylic acid copolymer.
Dependencies are inferred from the claim text.