Compositions in the Form of Dissolvable Solid Structures

Inactive Publication Date: 2015-11-05
THE PROCTER & GAMBLE COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a process for making a porous dissolvable solid that can be used as an open-celled foam. The process involves mixing a surfactant and a vinyl acetate-vinyl alcohol copolymer in water to create a wet aerated mixture. The mixture is then forced through a fibrillating process to create fibers, which are then dried and formed into a final solid with a desired amount of moisture content. The resulting foam has a percentage of open cells ranging from about 70% to about 100%. The technical effects of the patent include providing a process for making a porous dissolvable solid with a controlled amount of moisture content and a unique structure that allows for rapid absorption of fluids.

Problems solved by technology

While widely used, liquid products often have tradeoffs in terms of packaging, storage, transportation, and convenience of use.
Liquid consumer products typically are sold in bottles which add cost as well as packaging waste, much of which ends up in land-fills.
Although existing dissolvable products provide good performance benefits to end users, the processes for making them can have less than optimal cost, rate of manufacture, and / or product variability parameters.

Method used

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  • Compositions in the Form of Dissolvable Solid Structures
  • Compositions in the Form of Dissolvable Solid Structures
  • Compositions in the Form of Dissolvable Solid Structures

Examples

Experimental program
Comparison scheme
Effect test

example 1

Dissolvable Porous Solid Cleanser (Fibrous Structure) with Low Hydrolysis Vinyl Acetate-Vinyl Alcohol Copolymer

[0184]Table 1 below sets forth a non-limiting example of a premix (a fiber-forming composition) of the present invention for making fibers and / or a fibrous structure (nonwoven web) of the present invention via the fibrous structure making process described immediately above. The fibrous Structure is suitable for providing a beauty benefit, for example suitable for use as a shampoo.

TABLE 1% by weight offiber-formingcompositionMaterial(i.e., premix)Low Molecular Weight, Low hydrolysis vinyl5.13acetate-vinyl alcohol copolymer1High Molecular Weight, Low hydrolysis vinyl5.13acetate-vinyl alcohol copolymer2Lauryl Hydroxysultaine (40.5% activity)15.4Sodium Laureth-1 Sulfate (70% activity)29.9Cationic cellulose (cationic polymer)30.5Citric Acid0.4Distilled water43.541PVA403, Mw 30,000, 78-82% hydrolyzed, available from Kuraray America, Inc.2PVA420H, Mw 75,000, 78-82% hydrolyzed, av...

examples 2 and 3

Dissolvable Porous Solid Cleanser (Open Cell Foam) with Low Hydrolysis Vinyl Acetate-Vinyl Alcohol Copolymer

[0191]Table 3 below sets forth non-limiting examples of premixes for making an open celled foam Structure of the present invention. The premixes are formed using relatively low water (c. 60 wt %) / high solids (c. 40%) solids content. The foam Structure is suitable for providing a beauty benefit, for example suitable for use as a shampoo.

TABLE 3Example 2Example 3ComponentWt %Wt %Distilled waterqsqsGlycerin3.83.8Polyvinyl alcohol 420H19.56Polyvinyl alcohol 2052—3.5Sodium Laureth-3 sulfate1.81.8Sodium Laureth-1 sulfate12.912.9Sodium Lauryl Amphoacetate9.69.6Guar Hydroxypropyltrimonium0.50.5Chloride3Citric Acid1.81.8Total1001001PVA420H, Mw 75,000, 78-82% hydrolyzed, available from Kuraray America, Inc.2PVA 205, MW 39,000, 87-89% hydrolyzed, available from Sekisui Specialty Chemicals3Jaguar ® C500 supplied by Solvay-RhodiaNote that the wt % value for the Sodium Laureth-3 sulfate, So...

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Abstract

Described are dissolvable, porous solid structures formed using certain vinyl acetate-vinyl alcohol copolymers. The copolymer and the porosity of the structure allow for liquid flow during use such that the structure readily dissolves to provide a desired consumer experience. Also described are processes for making open cell foam and fibrous dissolvable solid structures.

Description

FIELD OF THE INVENTION[0001]The present invention relates to compositions in the form of dissolvable solid structures. The dissolvable solid structures are formed using certain polymers that allow the structures to perform well for their intended use and allow for beneficial manufacturing conditions.BACKGROUND OF THE INVENTION[0002]Many personal care, fabric care and other consumer products in the market today are sold in liquid form. While widely used, liquid products often have tradeoffs in terms of packaging, storage, transportation, and convenience of use. Liquid consumer products typically are sold in bottles which add cost as well as packaging waste, much of which ends up in land-fills.[0003]Dissolvable solid products have been disclosed, comprising a water-soluble polymeric structurant and a surfactant or other ingredients. Although existing dissolvable products provide good performance benefits to end users, the processes for making them can have less than optimal cost, rate...

Claims

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Application Information

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IPC IPC(8): C08J9/00B29C39/02B29C67/20B29C39/00
CPCC08J9/0033B29C39/003B29C39/02B29L2007/008C08J2331/04C08J2329/06B29L2007/002B29C67/20A61K8/0279A61K8/44A61K8/731A61K8/737A61K8/8135A61K8/86A61Q5/02A61Q11/00A61Q13/00A61Q15/00A61Q19/00A61Q19/10C11D3/3761D06M13/207D06M13/463D06M15/333D06M15/53A61K2800/49A61Q5/12A61K8/8129A61K8/0216D01D5/0985D01F6/34D01F6/50D01F1/02
Inventor MAO, MINHAMERSKY, MARK WILLIAMGLENN, JR., ROBERT WAYNETHOMPSON, TODD RYAN
Owner THE PROCTER & GAMBLE COMPANY
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