Bio-based polyelectrolyte complex compositions with increased hydrophobicity comprising fatty compounds
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United States of America Patent
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Jun 27, 2023
Grant Date -
Sep 19, 2019
app pub date -
Feb 22, 2019
filing date -
Aug 24, 2016
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Abstract
The invention relates to a bio-based polyelectrolyte complex (PEC) composition suitable as a binder for fiber based materials, textiles, woven and nonwoven materials, said PEC composition comprising cationic biopolymer, anionic biopolymer, acid and a preservative, and wherein the net charge of the PEC is cationic, the charge ratio of the anionic polymer and the cationic polymer is ≤1, the cationic biopolymer is chitosan, the anionic biopolymer is a polyanion derived from nature, the acid is a Brønsted acid and/or a Lewis acid, wherein the Brønsted acid is selected from any organic and/or inorganic acids, and wherein the Lewis acid is selected from any cationic mono- or multivalent atom, the weight ratio between cation and anion is 1:0.1 to 1:20, the weight ratio between the cation and acid is 1:0.01 to 1:30, chitosan has a degree of deacetylation being 66-100%, the pH is less than 7, and wherein said composition further comprises one or more fatty compounds as well as methods and use thereof. The present invention further relates to a method for preparing the PEC composition, uses of the PEC composition, as well as method of treating materials with the PEC composition.
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