Compositions in the form of dissolvable solid structures

Patent metadata

Field	Value
Publication number	US-10717839-B2
Application number	US-201715665886-A
Country	US
Kind code	B2
Filing date	Aug 1, 2017
Priority date	Apr 22, 2014
Publication date	Jul 21, 2020
Grant date	Jul 21, 2020

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.

First claim

What is claimed is:

1. A fibrous dissolvable solid Structure comprising a plurality of fibers, the Structure comprising:
(a) from about 5 wt % to about 65 wt % of at least one anionic surfactant;
(b) from about 5 wt % to about 50 wt % of a first copolymer comprising vinyl acetate and vinyl alcohol units, wherein the first copolymer comprises from about 65% to about 82.5% alcohol units and has a M W of from about 20,000 to about 60,000; and
(c) from about 5 wt % to about 50 wt % of a second copolymer comprising vinyl acetate and vinyl alcohol units, wherein the second copolymer comprises from about 65% to about 82.5% alcohol units and has a M W of from about 70,000 to about 500,000.

2. The fibrous Structure of claim 1 wherein at least 25% of the fibers have an average diameter less than about 1 micron.

3. The fibrous Structure of claim 1 comprising a conditioning agent selected from the group consisting of fatty compounds, silicone agents, cationic polymers, and mixtures thereof.

4. The fibrous Structure of claim 1 having a hand dissolution value of from about 1 stroke to about 15 strokes.

Assignees

• Procter & Gamble

Inventors

• Mao Min
• Hamersky Mark William
• Glenn Jr Robert Wayne
• Thompson Todd Ryan

Classifications

• A61Q5/02 Primary

  Preparations for cleaning the hair · CPC title

• D06M15/333

  of vinyl acetate; Polyvinylalcohol · CPC title

• B29C39/02

  for making articles of definite length, i.e. discrete articles · CPC title

• D06M13/463

  derived from monoamines · CPC title

• A61Q19/00

  Preparations for care of the skin · CPC title