Composition for use in a machine dishwasher

Patent metadata

Field	Value
Publication number	US-11142725-B2
Application number	US-201716322283-A
Country	US
Kind code	B2
Filing date	Aug 14, 2017
Priority date	Aug 15, 2016
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

A composition comprising: from 25 to 80 wt % of at least one vinyl acetate-vinyl alcohol copolymer, where the copolymer comprises at least 85 mol % vinyl alcohol units; from 1 to 25 wt % of at least one polyhydric alcohol; and from 5 to 50 wt % of a first active agent which is: a polymer comprising a monomer having at least one carboxylic acid group or a salt or ester thereof; a polymer comprising a monomer having at least one imine group or a salt thereof; or a polymer comprising a monomer having at least one aspartic acid group or a salt or ester thereof. A package containing the composition. A method of preparing the composition, the method comprising extruding the composition. A method of machine dishwashing, wherein the first active agent is released into wash water over the course of a plurality of dishwashing programs.

First claim

The invention claimed is:

1. A machine dishwashing detergent or additive composition comprising:
from 25 to 80 wt % of a vinyl acetate-vinyl alcohol copolymer, wherein the vinyl acetate-vinyl alcohol copolymer comprises at least 85 mol % vinyl alcohol units, has an average molecular weight of 30,000 to 90,000 g/mol, and has a degree of hydrolysis of 95 to 99 mol %;
from 1 to 25 wt % of a polyhydric alcohol; and
from 5 to 50 wt % of a first active agent comprising a polymer comprising a monomer selected from the group consisting of a monomer having at least one carboxylic acid group or a salt or ester thereof, having at least one imine group or a salt thereof, and having at least one aspartic acid group or a salt or ester thereof,
wherein the composition gradually dissolves and/or disperses over a plurality of wash programs in the machine dishwasher, wherein the vinyl acetate-vinyl alcohol copolymer is in the form of a mixture with the other ingredients of the composition and is not used as an enclosing material.

2. The composition according to claim 1 , wherein the first active agent comprises a polymer comprising at least 25 mol % of a monomer having at least one carboxylic acid group or a salt or ester thereof.

3. The composition according to claim 1 , wherein the polyhydric alcohol is glycerol.

4. The composition according to claim 1 further comprising a second active agent selected from the group consisting of a surfactant, a bleach catalyst, an enzyme, a dye and a pigment.

5. The composition according to claim 1 further comprising from 1 to 30 wt % of a polyvinyl acetate.

6. A machine dishwashing detergent or additive composition consisting essentially of:
from 25 to 80 wt % of a vinyl acetate-vinyl alcohol copolymer wherein the vinyl acetate-vinyl alcohol copolymer comprises at least 85 mol % vinyl alcohol units, has an average molecular weight of 30,000 to 90,000 g/mol, and has a degree of hydrolysis of 95 to 99 mol %;
from 1 to 25 wt % of a polyhydric alcohol;
from 5 to 50 wt % of a first active agent comprising a polymer comprising a monomer selected from the group consisting of a monomer having at least one carboxylic acid group or a salt or ester thereof, having at least one imine group or a salt thereof, and having at least one aspartic acid group or a salt or ester thereof;
optionally a polyvinyl acetate; and
optionally a colorant,
wherein the composition gradually dissolves and/or disperses over a plurality of wash programs in the machine dishwasher, wherein the vinyl acetate-vinyl alcohol copolymer is in the form of a mixture with the other ingredients of the composition and is not used as an enclosing material.

7. The composition according to claim 1 , which is in the form of an extrudate.

8. A package containing the composition according to claim 1 .

9. A method of preparing a composition according to claim 1 comprising extruding the vinyl acetate-vinyl alcohol copolymer, the polyhydric alcohol and the first active agent.

10. A method of machine dishwashing comprising using the composition according to claim 1 comprising releasing the first active agent into wash water over the course of a plurality of dishwashing programs.

11. The method according to claim 10 , wherein no more than 25 wt % of the composition is dissolved and/or dispersed in the wash water during a first dishwashing program of the dishwashing programs.

12. The method according to claim 11 further comprising running a dishwashing cycle using a machine cleaner composition once complete dissolution and/or dispersion of the composition has occurred.

13. The composition according to claim 1 , wherein the first active agent comprises a polymer comprising at least 25 mol % of a homopolymer or copolymer of (meth)acrylic acid or a salt thereof.

14. An alert method for a dishwashing machine comprising:
using an amount of the composition according to claim 1 in a plurality of dishwashing programs;
alerting once the amount of the composition has fully dissolved or dispersed.

15. The alert method of claim 14 , wherein alerting occurs upon completion a dishwashing program where the amount of the composition has fully dissolved or dispersed.

16. The alert method of claim 14 , wherein alerting comprises signalling to clean the dishwasher with a machine cleaner composition.

Assignees

• Reckitt Benckiser Finish Bv

Inventors

• Al-Bayati Alias Younis
• Deckert Christoph
• Zahner Michael
• Preuschen Judith

Classifications

• C11D3/2041

  Dihydric alcohols · CPC title

• C11D3/3719

  Polyamides or polyimides · CPC title

• C11D3/3723

  Polyamines or polyalkyleneimines · CPC title

• C11D17/041

  Compositions releasably affixed on a substrate or incorporated into a dispensing means · CPC title

• C11D17/042

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