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Surfactant Polymer Blends

IP.com Disclosure Number: IPCOM000193181D
Publication Date: 2010-Feb-12

Publishing Venue

The IP.com Prior Art Database

Abstract

The present diclosure relates to surfactant-polymer blends that are useful as thickeners for a variety of personal care products. In one embodiment, the surfactant-polymer blends of the present invention comprises: (a) at least one anionic surfactant; (b) at least one amphoteric or zwitterionic surfactant; and (c) at least one hydrophobically-modified polymer formed from a mixture comprising: (i) an α,β-ethylenically unsaturated carboxylic acid monomer; (ii) a nonionic, co-polymerizable α,β-ethylenically unsaturated monomer; and (iii) an ethylenically unsaturated hydrophobically-modified associative monomer. In another embodiment, the surfactant-polymer blends of the present invention comprises: (a) at least one anionic surfactant; (b) at least one amphoteric or zwitterionic surfactant; and (c) at least one hydrophobically-modified polymer formed from a mixture comprising: (i) an α,β-ethylenically unsaturated carboxylic acid monomer; (ii) a nonionic, co-polymerizable α,β-ethylenically unsaturated monomer; and (iii) an ethylenically unsaturated hydrophobically-modified associative monomer; and (d) at least one salt. The surfactant-polymer blends of the present invention are useful as thickeners in a variety of products including, but not limited to, personal care products, health care products, household care products, institutional and industrial care products, and industrial applications.

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SURFACTANT-POLYMER BLENDS

FIELD OF THE INVENTION
[0001]
The present invention relates to surfactant-polymer blends that are useful as thickeners for a variety of health care, home care, institutional and industrial (collectively "I&I") care products. In one embodiment, the surfactant- polymer blends of the present invention comprises: (a) at least one anionic surfactant; (b) at least one amphoteric or zwitterionic surfactant; and (c) at least one hydrophobically-modified polymer formed from a mixture comprising: (i) an α,β-ethylenically unsaturated carboxylic acid monomer; (ii) a nonionic, co- polymerizable α,β-ethylenically unsaturated monomer; and (iii) an ethylenically unsaturated hydrophobically-modified associative monomer. In another embodiment, the surfactant-polymer blends of the present invention comprises:
(a) at least one anionic surfactant; (b) at least one amphoteric or zwitterionic surfactant; and (c) at least one hydrophobically-modified polymer formed from a mixture comprising: (i) an α,β-ethylenically unsaturated carboxylic acid monomer; (ii) a nonionic, co-polymerizable α,β-ethylenically unsaturated monomer; and (iii) an ethylenically unsaturated hydrophobically-modified associative monomer; and (d) at least one salt. The surfactant-polymer blends of the present invention are useful as thickeners in a variety of products including, but not limited to, personal care products, health care products, household care products, institutional and industrial care products, and industrial applications.

BACKGROUND OF THE INVENTION
[0002]
Rheology modifiers, or thickeners, have several roles in aqueous systems. They increase viscosity and maintain viscosity at required levels under specified processing conditions and end use situations. In cosmetics and personal care items, for example, the thickener improves body, smoothness and silkiness, making the product more aesthetically pleasing.
[0003] Many rheology modifiers, both natural and synthetic, are known. Natural rheology modifiers include, for example, casein, alginates, gum

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tragacanth, and modified cellulose, including methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose and carbomethoxy cellulose. These natural products vary in their thickening efficiency and generally provide poor flow and leveling properties; they are also subject to microbial attack and require the additional presence of antimicrobial agents. Synthetic rheology modifiers include various acrylic polymers and maleic anhydride copolymers. Some of these are found to be pH dependent, others are hydrolytically unstable, some require large amounts of thickener to effectively increase viscosity, others are sensitive to various components normally found in aqueous systems, and still others require large amounts of salt to increase the viscosity to a desired or suitable level.
[0004] Additionally, many cleansing formulations are prepared using mixtures or combination of surfactants and as a result are, or can be, very difficult to thicken. Although some surfactant mixtures can be thickened wi...