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Personal care compositions including aqueous compositions of viscoelastic surfactants and hydrophobically modified polymers

Inactive Publication Date: 2013-10-10
AKZO NOBEL CHEM INT BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text discusses the difficulty of dissolving and distributing high molecular weight polymers in aqueous formulations. To address this problem, the patent proposes the use of aqueous surfactant systems that require less chemicals to achieve a desired viscosity or can be used at higher concentrations, reducing costs and expanding the range of applications where the polymers can be used. Additionally, the patent proposes the use of these systems to make polymers easier to disperse in aqueous formulations.

Problems solved by technology

High molecular weight polymers are generally difficult to dissolve and difficult to distribute homogeneously in aqueous formulations.

Method used

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  • Personal care compositions including aqueous compositions of viscoelastic surfactants and hydrophobically modified polymers
  • Personal care compositions including aqueous compositions of viscoelastic surfactants and hydrophobically modified polymers
  • Personal care compositions including aqueous compositions of viscoelastic surfactants and hydrophobically modified polymers

Examples

Experimental program
Comparison scheme
Effect test

example 10

Stress Sweep and Elastic Modulus Measurement

Stress Sweep

[0150]Dynamic stress sweep were also evaluated using the Rheometric Scientific rheometer and same plate configuration as for steady state stress sweep. Measurement was carried out at a frequency of 1 Hz. These values allow us to investigate yield stress, storage (elastic) and loss (viscous) modulus. Figure below shows a typical example.

Elastic Modulus Results

[0151]Composition 1 containing 7.5% of surfactant, 3% Sodium Chloride, and 0% polymer was prepared and evaluated according to Example 10. Composition 2 containing 7.5% surfactant, 3% Sodium Chloride, and 0.2% R7-36-72 was prepared and evaluated according to Example 5.

[0152]The results are found in FIG. 9 showing Elastic Modulus as a function of Stress.

[0153]These data demonstrate that addition of the polymer of the present invention can dramatically increase the elastic modulus and yield stress of surfactant systems.

example 12

Foam Evaluation

[0154]Foam property was evaluated by creating a foam using a blender and the measuring the time taken for half of total liquid to drain from the foam matrix.

Procedure:

[0155]Prepare a 0.035% solution of each of the formulation by diluting with water. A total of 200 ml of the 0.035% solution were transferred to a blender (Oster Fusion, 3 speed blender). Blend the solution at medium speed for 30 sec. Transfer the resulting foam quickly into a 1000 ml cylinder and measure the volume of foam created.

example 13

Influence of Polymer on Foam Volume

[0156]Shampoo 1 containing 7.5% surfactant, 3% salt was prepared and evaluated for its foam height. Second, shampoo 2 containing 7.5% surfactant, 3% salt, and 0.25% polymer R7-36-72 was prepared and evaluated for its foam height. Finally, a Shampoo 3, a deep cleansing shampoo from a leading brand that is estimated to contain 15% total surfactants, was evaluated for its foam height. The results are summarized in Table 10 below.

TABLE 10Product NameFoam HeightStandard DeviationShampoo 1782 mL30 mL Shampoo 2845 mL2 mLShampoo 3802 mL3 mL

[0157]These data demonstrate that the polymers of the present invention enhance the foam characteristics of shampoo. Additionally, these data demonstrate that it is possible to exceed the foam characteristics of a shampoo with ˜15% surfactant with one that contains only 7.5% surfactant by addition of the polymer of the present invention.

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Abstract

Personal care compositions, methods for making and uses thereof include an aqueous viscoelastic composition and a personal care active ingredient. The viscoelastic composition includes at least one surfactant and at least one hydrophobically-modified polymers with low molecular weights.

Description

FIELD OF THE INVENTION[0001]The present invention relates to personal care compositions comprising aqueous viscoelastic compositions comprising at least one viscoelastic surfactant, and at least one hydrophobically modified polymer.BACKGROUND OF THE INVENTION[0002]It is noted that WO 2003 / 056130 proposes an improvement on such existing systems and proposes to use a combination of viscoelastic surfactants and a hydrophobically modified polymer, wherein the concentration of the hydrophobically modified polymer is comprised between its overlap concentration c* and its entanglement concentration ce. Although the viscoelastic fluids of WO 2003 / 056130 have certain commercial value, they contain high amounts of both surfactant and hydrophobically modified polymer in order to achieve aqueous compositions with the desired viscosity. Further, in the polymer, the hydrophobes are connected to the polymer backbone via a degradable group.[0003]It is noted that also in U.S. Pat. No. 4,432,881 liqu...

Claims

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Application Information

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IPC IPC(8): A61K8/87A61Q9/02A61K8/81A61Q5/12A61Q5/00A61Q5/02A61Q19/10A61K8/84A61Q19/00C09K23/00
CPCA61Q19/00C11D17/003C09K8/68C09K8/88C09K2208/30A61K8/87A61K8/84A61K8/8147A61K8/8111A61Q5/00C08L33/10C08L33/26C08L39/00E21B43/26A61Q5/02A61Q5/12A61Q9/02A61Q19/10C11D1/29C11D1/92C11D1/94C11D3/3765C09K8/604
Inventor YUAN-HUFFMAN, QINGWEN WENDYRODRIGUES, KLIN A.ZHOU, JIANHOLT, STUART PETER ROBERTBAND, JR., ELLIOT ISAACVONA, SAMUEL ANTHONY
Owner AKZO NOBEL CHEM INT BV
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