Polyelectrolyte Complexes

a polyelectrolyte complex and polyelectrolyte technology, applied in the field of associative polyelectrolyte complexes in water compositions, can solve the problems of unsightly surfaces requiring frequent cleaning and reapplication, and consumers are dissatisfied with their ability to prevent water and soil

Inactive Publication Date: 2011-09-29
THE CLOROX CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012]In one aspect of the present invention is a method of adding a surfactant to a treatment composition after formation of at least one associative polyelectrolyte complex in the treatment composition; wherein the surfactant is selected from the group consisting of water soluble and/or water dispersible anionic, cationic, zwitterionic, nonionic or amphoteric surfactants. In another aspect of the present invention is a method of adding either a biocide or an oxidant, or a combination thereof, to a treatment composition containing at

Problems solved by technology

Consumers are dissatisfied with their ability to prevent water and soils, such as water spots, soap scum, toothpaste, scale, greasy soils, brake dust, grime, rust, and toilet ring, from soiling and building up on household surfaces and other exposed materials.
However, many commercial disinfectants e

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

Small Scale Preparation of PAA and Chitosan Stock Solutions

[0060]A series of PAA / Chitosan PECs was prepared at several R values via gentle mixing using a magnetic stir bar for 1-2 minutes while stirring the solution, the minor polymeric component being placed in the vessel first as designated in the Table 1A with “1” followed by the major polymeric component added to the minor component solution designated with a “2” next to the weight used. The orders of addition change, of course, depending on the desired R value. The resulting associative PEC solutions were allowed to stir overnight and yielded clear solutions in all cases.

TABLE 1ACompositions of Chitosan / PAA PECsTotal20 wt %concen-CitrictrationStock AStock BAcidchargedFormulation(mL)(mL)(mL)H2Ogroups#R (a)(b)(c)(d)(mL)(mM)SCPAA10.250.4515 (1)0.7615 (2)0.552416.75801.29SCPAA20.510.7505 (1)0.6319 (2)0.497216.44921.30SCPAA30.770.9731 (1)0.5419 (2)0.437016.57101.29SCPAA41.051.1382 (1)0.4661 (2)0.396716.53421.28SCPAA51.271.2580 (2)0....

example 2

[0067]The size of the stable associative PECs, and the composition of the thin adsorbed layers formed by treating surfaces with aqueous solutions of PECs can be controlled by changing the ratio of the polymers comprising the associative PECs, i.e., by changing the R parameter.

[0068]The FT-IR spectrum of chitosan, PAA and citric acid all exhibit one or more unique absorbance bands allowing their presence, as well as relative amount present on the surface of the IRE to be detected and monitored in real time.

[0069]The data in Table 2 illustrate that the composition of a layer can be controlled by varying the R parameter of the associative PECs. Since there were no added surfactants, the data also illustrate the surprising activity of the associative PECs solutions on a solid surface, even in the absence of a drying step and any “wetting” of the solid surface by surfactants.

[0070]Referring to Table 2, in one experiment with the R=0.25 associative PEC solution, the adsorption time was 5 ...

example 3

[0073]The associative PECs of the present invention, when made with polymers that exhibit chemical stability to oxidants such as sodium hypochlorite or hydrogen peroxide, are useful for providing hydrophilic modification of surfaces through the use of cleaning products familiar to consumers.

[0074]Hypochlorite-stable associative PECs can be made from mixtures of the alkali metal salt of poly(acrylic acid) (PAA) and poly(diallyl dimethyl ammonium chloride) denoted as poly(DADMAC) or simply DADMAC. However, the surface of a Ge IRE suitable for the FT-IR experiments is changed by exposure to sodium hypochlorite, which is a relatively strong oxidant. Thus, the formulations cited in Tables 3.1 and 3.2 below, which are used to demonstrate associative PEC stability and substantivity, were formulated using sodium chloride as a substitute for the sodium hypochlorite. It is believed, without being bound by theory, that the difference between the chloride and hypochlorite salts is immaterial, b...

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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.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to aqueous compositions of associative polyelectrolyte complexes (PECs) 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.[0003]2. Description of the Prior Art[0004]Consumers are dissatisfied with their ability to prevent water and soils, such as water spots, soap scum, toothpaste, scale, greasy soils, brake dust, grime, rust, and toilet ring, from soiling and building up on household surfaces and other exposed materials. It would be desirable to have treatment means that would easily modify or enhance the surface protective properties of a wide variety of materials to retain and / or maintain their “like new” appearance and / or clean state and / or ...

Claims

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Application Information

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IPC IPC(8): B05D3/00C09D5/14C09D5/00
CPCC09D133/02C09D5/14C11D1/62C11D3/3769C11D3/3953A01N25/10A01N33/12A01N59/00A01N59/16
Inventor SCHEUING, DAVID R.LESTAGE, DAVID J.BENNETT, CARL W.KNOCK, MONA M.SCALES, CHARLES W.SMITH, WILLIAM L.ZHANG, RUI
Owner THE CLOROX CO
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