Dissolvable solid structure having first and second layers

Patent metadata

Field	Value
Publication number	US-12540238-B2
Application number	US-202318181675-A
Country	US
Kind code	B2
Filing date	Mar 10, 2023
Priority date	Mar 10, 2022
Publication date	Feb 3, 2026
Grant date	Feb 3, 2026

Abstract

A dissolvable solid structure with a first layer and a second layer. The first layer includes from about 20% to about 100%, by weight of the first layer, of a first water-soluble polymer. The second layer includes from about 1% to about 50%, by weight of the second layer, of a second water-soluble polymer, a high melting point fatty material having an average carbon chain length C12-C22 and a melting point above 25° C., and a cationic surfactant. The dissolvable solid structure can provide improved flexibility and solubility in a composition, such as water, while having a sufficient structural integrity during manufacturing.

First claim

What is claimed is:

1 . A dissolvable solid structure comprising:
a. a first layer comprising filaments; wherein the filaments comprise from about 20% to 100%, by weight of the first layer, of a first water-soluble polymer; wherein the first layer is free of surfactant; wherein the first polymer is chosen from
i. a polyvinyl alcohol comprising an average molecular weight of from about 23,000 g/mol to about 45,000 g/mol;
ii. a mixture of polyvinyl alcohols, wherein the mixture comprises an average molecular weight of from about 23,000 g/mol to about 45,000 g/mol;
iii. or mixtures thereof;
b. a second layer comprising filaments; wherein the filaments comprise from about 1% to about 50%, by weight of the second layer, of a second water-soluble polymer; wherein the second water-soluble polymer is selected from the group consisting of polyvinylpyrrolidone, a polyvinylpyrrolidone copolymer, or mixtures thereof;
a high melting point fatty material comprising an average carbon chain length from C12-C22 and the melting point is above 25° C.; and
a cationic surfactant.

2 . The dissolvable solid structure of claim 1 , wherein the first layer comprises from about 50% to 100%, by weight of the first layer, of the first water-soluble polymer.

3 . The dissolvable solid structure of claim 2 , wherein the first layer comprises from about 90% to 100%, by weight of the first layer, of the first water-soluble polymer.

4 . The dissolvable solid structure of claim 3 , wherein the first layer comprises from about 95% to 100%, by weight of the first layer, of the first water-soluble polymer.

5 . The dissolvable solid structure of claim 1 , wherein the second layer comprises from about 1% to about 20%, by weight of the second layer, of the second water-soluble polymer.

6 . The dissolvable solid structure of claim 5 , wherein the second layer comprises from about 1% to about 10%, by weight of the second layer, of the second water-soluble polymer.

7 . The dissolvable solid structure of claim 6 , wherein the second layer comprises from about 2% to about 6%, by weight of the second layer, of the second water-soluble polymer.

8 . The dissolvable solid structure of claim 1 , wherein the first layer comprises a Scaled Fail Tensile Energy Absorption (Scaled Fail TEA) of from about 10 g/cm to about 185 g/cm.

9 . The dissolvable solid structure of claim 8 , wherein the first layer comprises a Scaled Fail Tensile Energy Absorption (Scaled Fail TEA) of from about 20 g/cm to about 180 g/cm.

10 . The dissolvable solid structure of claim 9 , wherein the first layer comprises a Scaled Fail Tensile Energy Absorption (Scaled Fail TEA) of from about 25 g/cm to about 175 g/cm.

11 . The dissolvable solid structure of claim 1 , wherein the first water-soluble polymer comprises the polyvinyl alcohol comprising an average molecular weight of from about 26,000 g/mol to about 35,000 g/mol.

12 . The dissolvable solid structure of claim 1 , wherein the first water-soluble polymer comprises the mixture of polyvinyl alcohols comprising an average molecular weight of from about 26,000 g/mol to about 35,000 g/mol.

13 . The dissolvable solid structure of claim 1 , wherein the first water-soluble polymer further comprises a thermal bonded starch comprising a plasticizer comprising a molecular weight of from about 2,000,000 g/mol to about 40,000,000 g/mol.

14 . The dissolvable solid structure of claim 1 ,
wherein the first layer further comprises an ingredient incompatible with at least one of the ingredients in the second layer.

15 . The dissolvable solid structure of claim 1 , wherein at least one of the first or second layers comprises a particulate.

16 . The dissolvable solid structure of claim 15 , wherein the second layer comprises the particulate.

17 . The dissolvable solid structure of claim 1 , wherein the dissolvable solid structure dissolves in less than 15 strokes of the Hand Dissolution Method.

Assignees

• Procter & Gamble

Inventors

• Hamersky Mark William
• Hilvert Jennifer Elaine
• Mao Min
• Nyangiro Dinah Achola

Classifications

• C08K2201/014

  Additives containing two or more different additives of the same subgroup in C08K · CPC title

• C08K5/16

  Nitrogen-containing compounds {(C08K5/0091 takes precedence)} · CPC title

• C08K5/1545

  Six-membered rings · CPC title

• C08L29/04 Primary

  Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids · CPC title

• B65D65/46

  Applications of disintegrable, dissolvable or edible materials · CPC title