Water-soluble unit dose articles made from a combination of different films and containing household care compositions

Patent metadata

Field	Value
Publication number	US-11078451-B2
Application number	US-201916655290-A
Country	US
Kind code	B2
Filing date	Oct 17, 2019
Priority date	Jun 13, 2016
Publication date	Aug 3, 2021
Grant date	Aug 3, 2021

Abstract

The present disclosure relates to water-soluble unit dose articles made from a combination of chemically different water-soluble films and containing household care compositions that are at least partially enclosed by the water-soluble films in at least one compartment.

First claim

What is claimed is:

1. A water-soluble unit dose article comprising at least one sealed compartment comprising at least one household care composition, the water-soluble unit dose article comprising
a first water soluble film comprising a first water soluble resin;
and a second water soluble film comprising a second water soluble resin;
wherein the first film is sealed to the second film to form the at least one sealed compartment;
wherein the first water soluble resin comprises at least one polyvinyl alcohol homopolymer or at least one polyvinylalcohol copolymer or a blend thereof, the at least one polyvinyl alcohol homopolymer or at least one polyvinylalcohol copolymer or blend thereof having a 4% solution viscosity in demineralized water at 25° C. in a range of about 8 cP to about 40 cP;
wherein the second water soluble resin comprises at least one polyvinyl alcohol homopolymer or at least one polyvinylalcohol copolymer or a blend thereof, the at least one polyvinyl alcohol homopolymer or at least one polyvinylalcohol copolymer or blend thereof having a 4% solution viscosity in demineralized water at 25° C. in a range of about 4 cP to about 35 cP; and
wherein the 4% solution viscosity in demineralized water at 25° C. of the at least one polyvinyl alcohol homopolymer or the at least one polyvinylalcohol copolymer or the blend thereof of the first water soluble resin is greater than the 4% solution viscosity in demineralized water at 25° C. of the at least one polyvinyl alcohol homopolymer or the at least one polyvinylalcohol copolymer or the blend thereof of the second water soluble resin and the difference between the 4% solution viscosity in demineralized water at 25° C. of the at least one polyvinyl alcohol homopolymer or the at least one polyvinylalcohol copolymer or the blend thereof of the first water soluble resin and the 4% solution viscosity in demineralized water at 25° C. of the at least one polyvinyl alcohol homopolymer or the at least one polyvinylalcohol copolymer or the blend thereof of the second water soluble resin is about 2 cP about 20 cP.

2. The water-soluble unit dose article of claim 1 , wherein the first water soluble film is thermoformed prior to incorporation into the water-soluble unit dose article.

3. The water-soluble unit dose article of claim 1 , wherein the second water soluble film is not thermoformed prior to incorporation into the water-soluble unit dose article.

4. The water-soluble unit dose article of claim 1 , wherein the first water soluble resin comprises a blend of polyvinyl alcohol homopolymer and polyvinyl alcohol copolymer.

5. The water-soluble unit dose article of claim 1 , wherein the second water soluble resin comprises a blend of polyvinyl alcohol homopolymer and polyvinyl alcohol copolymer.

6. The water-soluble unit dose article of claim 1 , wherein the first water soluble resin comprises a blend of polyvinyl alcohol homopolymer and polyvinyl alcohol copolymer comprising an anionic monomer unit.

7. The water-soluble unit dose article of claim 6 , wherein the first water soluble resin comprises from about 1% to about 70% by weight of the first water soluble resin of the polyvinyl alcohol copolymer comprising an anionic monomer unit and from about 30% to about 99% by weight of the first water soluble resin of the polyvinyl alcohol homopolymer.

8. The water-soluble unit dose article of claim 7 , wherein the first water soluble resin comprises from about 10 wt % to about 70 wt % by weight of the first water soluble resin of the polyvinyl alcohol copolymer comprising an anionic monomer unit and from about 30% to about 90% by weight of the first water soluble resin of the polyvinyl alcohol homopolymer.

9. The water-soluble unit dose article of claim 1 , wherein the second water soluble resin comprises a blend of polyvinyl alcohol homopolymer and polyvinyl alcohol copolymer comprising an anionic monomer unit.

10. The water-soluble unit dose article of claim 9 , wherein the second water soluble resin comprises from about 1 wt % to about 70 wt % by weight of the second water soluble resin of the polyvinyl alcohol copolymer comprising an anionic monomer unit and from about 30 wt % to about 99 wt % by weight of the second water soluble resin of the polyvinyl alcohol homopolymer.

11. The water-soluble unit dose article of claim 10 , wherein the second water soluble resin comprises from about 10 wt % to about 70 wt % by weight of the second water soluble resin of the polyvinyl alcohol copolymer comprising an anionic monomer unit and from about 30% to about 90% by weight of the second water soluble resin of the polyvinyl alcohol homopolymer.

12. The water-soluble unit dose article of claim 1 , wherein the first water soluble resin, the second water soluble resin, or both comprises at least one polyvinylalcohol copolymer that comprises an anionic monomer unit, wherein the anionic monomer unit is selected from the group consisting of anionic monomers derived from vinyl acetic acid, alkyl acrylates, maleic acid, monoalkyl maleate, dialkyl maleate, monomethyl maleate, dimethyl maleate, maleic anhydride, fumaric acid, monoalkyl fumarate, dialkyl fumarate, monomethyl fumarate, dimethyl fumarate, fumaric anhydride, itaconic acid, monomethyl itaconate, dimethyl itaconate, itaconic anhydride, citraconic acid, monoalkyl citraconate, dialkyl citraconate, citraconic anhydride, mesaconic acid, monoalkyl mesaconate, dialkyl mesaconate, mesaconic anhydride, glutaconic acid, monoalkyl glutaconate, dialkyl glutaconate, glutaconic anhydride, vinyl sulfonic acid, alkyl sulfonic acid, ethylene sulfonic acid, 2-acrylamido-1-methyl propane sulfonic acid, 2-acrylamide-2-methylpropanesulfonic acid, 2-methylacrylamido-2-methylpropanesulfonic acid, 2-sulfoethyl acrylate, alkali metal salts thereof, esters thereof, and combinations thereof.

13. The water-soluble unit dose article of claim 12 , wherein the anionic monomer unit is selected from the group consisting of anionic monomer units derived from maleic acid, monoalkyl maleate, dialkyl maleate, maleic anhydride, alkali metal salts thereof, esters thereof, and combinations thereof.

14. The water-soluble unit dose article of claim 13 , wherein the anionic monomer unit is selected from the group consisting of anionic monomer units derived from maleic acid, monomethyl maleate, dimethyl maleate, maleic anhydride, alkali metal salts thereof, esters thereof, and combinations thereof.

15. The water-soluble unit dose article of claim 1 , wherein the first water soluble resin, the second water soluble resin, or both comprises at least one polyvinylalcohol copolymer that comprises an anionic monomer unit, wherein the polyvinyl alcohol copolymer(s) independently comprises from about 2 mol % to about 8 mol % of the anionic monomer unit with respect to total polyvinyl alcohol copolymer present.

16. The water-soluble unit dose article of claim 1 , wherein the first water-soluble film and the second water-soluble film each independently comprises from about 30 wt % to about 90 wt % by weight of the film of water-soluble resin.

17. The water-soluble unit dose article of claim 1 , wherein the first water-soluble film and the second water-soluble film each independently has a thickness prior to incorporation into the water-soluble unit dose article of about 40 microns to about 100 microns.

18. The water-soluble unit dose article of claim 1 , wherein the difference in thickness between the first water-soluble film and the second water-soluble film is less than about 50%, or less than about 30%, or less than about 20%, or less t

Assignees

• Procter & Gamble

Inventors

• Courchay Florence Catherine
• Labeque Regine
• Friedrich Steven George
• Lee David M
• Nii Shinsuke
• Yeung Lee Kon
• Yogan Thomas J
• Renmans Marc Rene Bert

Classifications

• B65D65/46

  Applications of disintegrable, dissolvable or edible materials · CPC title

• C11D17/042 Primary

  Water soluble or water disintegrable containers or substrates containing cleaning compositions or additives for cleaning compositions · CPC title

• C11D17/045

  Multi-compartment · CPC title