Fluorocarbon-free and bio-based oil and water barrier materials comprising polyelectrolyte complexes
AssigneeOrganoclick AB
InventorsJuhanes Aydin, Maria Wennman
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Abstract
The present invention relates generally to compositions comprising polyelectrolytes complexes (PECs) of anionic and cationic biopolymers capable of forming barriers on fiber based materials. Also disclosed is a fibre based material with a barrier coating against oil and water, wherein the material is provided with a barrier from at least two layers formed from at least one composition comprising a polyelectrolyte complex (PEC) of a cationic biopolymer and an anionic biopolymer, The two layers result in improvements in both oil resistance and water resistance compared to the same material provided with a single layer of said at least one composition.
Claims17
A fibre-based material with a barrier coating against oil and water, said barrier coating comprising at least two layers formed from at least one composition comprising a polyelectrolyte complex (PEC) of a cationic biopolymer and an anionic biopolymer and a pH-adjuster comprising a buffering system with an acid and a base, wherein the first layer is made from a composition with a first pH value and the second layer is made from a composition having a second pH value different from the first pH value of the first composition, and wherein the two layers result in improvements in both oil resistance and water resistance compared to the same material provided with a single layer of said at least one composition.
Dependencies are inferred from the claim text.