Polyelectrolyte complexes
First Claim
1. An aqueous composition comprising:
- at least one associative polyelectrolyte complex formed by combining;
a. water;
b. a water soluble cationic first polyelectrolyte selected from the group consisting of chitosan, synthetically produced β
-1,4-poly-D-glucosamines and derivatives thereof, cationic guar, hydroxypropyl guar and starch bearing cationic charges added by chemical quaternization;
c. a water soluble anionic second polyelectrolyte selected from the group consisting of homo- or copolymers of the following anionic monomers;
acrylic acid, methacrylic acid, maleic acid, maleic anhydride, itaconic acid, styrene sulfonic acid and acrylamide propane sulfonic acid;
wherein the associative polyelectrolyte complex is at a concentration of less than or equal to about 50 mM with respect to a total concentration of charged associating groups present on the first and the second polyelectrolytes; and
wherein the first polyelectrolyte and the second polyelectrolyte are not block copolymers.
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Abstract
The present invention relates to aqueous compositions of associative polyelectrolyte complexes (PECs), optionally containing surfactants, biocidal agents and/or oxidants, which can provide surface protection to treated articles including reduced soiling tendency, reduced cleaning effort and improved soil repellancy, as well as providing bacteriostatic properties to treated surfaces that thereby gain resistance to water, environmental exposure and microbial challenge. Treatment means and compositions are provided that employ associative polyelectrolyte complexes formed by combining a water soluble cationic first polyelectrolyte with a water soluble second polyelectrolyte bearing groups of opposite charge to the first polyelectrolyte under suitable mixing conditions where the one polyelectrolyte present in molar excess is added in the form of a first aqueous solution during a mixing step to a second aqueous solution comprising the oppositely charged polyelectrolyte present in molar deficiency. Also provided are means to form stable associative polyelectrolyte complexes in aqueous solutions having R values from about 0.10 to 20, including near stoichiometric R values approaching 1, being the ratio of charged groups present on the component polyelectrolytes employed.
122 Citations
20 Claims
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1. An aqueous composition comprising:
at least one associative polyelectrolyte complex formed by combining; a. water; b. a water soluble cationic first polyelectrolyte selected from the group consisting of chitosan, synthetically produced β
-1,4-poly-D-glucosamines and derivatives thereof, cationic guar, hydroxypropyl guar and starch bearing cationic charges added by chemical quaternization;c. a water soluble anionic second polyelectrolyte selected from the group consisting of homo- or copolymers of the following anionic monomers; acrylic acid, methacrylic acid, maleic acid, maleic anhydride, itaconic acid, styrene sulfonic acid and acrylamide propane sulfonic acid; wherein the associative polyelectrolyte complex is at a concentration of less than or equal to about 50 mM with respect to a total concentration of charged associating groups present on the first and the second polyelectrolytes; and wherein the first polyelectrolyte and the second polyelectrolyte are not block copolymers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An aqueous composition comprising:
at least one associative polyelectrolyte complex formed by combining; a) water; b) a water soluble cationic first polyelectrolyte selected from a homopolymer of poly(diallyl dimethyl ammonium chloride); c) a water soluble anionic second polyelectrolyte selected from the group consisting of homo- or copolymers of the following anionic monomers;
acrylic acid, methacrylic acid, maleic acid, maleic anhydride, itaconic acid, styrene sulfonic acid, acrylamide propane sulfonic acid and mixtures thereof;wherein the associative polyelectrolyte complex is at a concentration of less than or equal to about 50 mM with respect to a total concentration of charged associating groups present on the first and the second polyelectrolytes; wherein said first polyelectrolyte and the second polyelectrolyte are not block copolymers. - View Dependent Claims (15, 16, 17, 18, 19, 20)
Specification