Bio-based polyelectrolyte complex compositions comprising non-water soluble particles
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United States of America Patent
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Dec 13, 2022
Grant Date -
Jul 25, 2019
app pub date -
Feb 22, 2019
filing date -
Aug 24, 2016
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Abstract
The present 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 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 non-water soluble particles. 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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