Cleaning particles and their use

Patent metadata

Field	Value
Publication number	US-10865364-B2
Application number	US-201615746468-A
Country	US
Kind code	B2
Filing date	Jul 28, 2016
Priority date	Jul 29, 2015
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

This invention relates to cleaning particles, methods for their preparation, cleaning compositions and their use for laundry cleaning of soiled substrates.

First claim

The invention claimed is:

1. Cleaning particles comprising a thermoplastic polyamide and a hydrophilic material, comprising at least one compound having at least one pendant hydrophilic group, at least part of which is located inside the cleaning particle, said cleaning particles having an average particle size of from 1 to 20 mm,
wherein the hydrophilic material comprises a surfactant, a dye transfer inhibitor (DTI), a builder, or a polyether and is present in an amount of from 0.1 to 40 wt %, and
wherein the cleaning particles additionally comprise 5 wt % to 75 wt % of a filler.

2. The cleaning particles according to claim 1 , wherein the hydrophilic material comprises a surfactant.

3. The cleaning particles according to claim 1 , wherein the hydrophilic material comprises a dye transfer inhibitor (DTI) or a builder.

4. The cleaning particles according to claim 3 , wherein the dye transfer inhibitor (DTI) comprises a polymer comprising repeat units obtained by copolymerizing vinyl pyrrolidone and vinyl imidazole, or wherein the polymer comprises repeat units obtained from polymerizing one or more of the monomers selected from the group consisting of maleic acid, acrylic acid, methacrylic acid, ethacrylic acid, vinylacetic acid, allylacetic acid, itaconic acid, 2-carboxy ethyl acrylate and crotonic acid, in the form of the free acid or salt thereof.

5. The cleaning particles according to claim 1 , wherein the hydrophilic material comprises a polyether block polyamide.

6. The cleaning particles according to claim 1 , wherein the hydrophilic material is present in an amount of from 0.1 to 15 wt %, based on the total weight of the cleaning particle.

7. The cleaning particles according to claim 1 , wherein the thermoplastic polyamide comprises an aliphatic or aromatic polyamide.

8. The cleaning particles according to claim 1 , wherein the cleaning particles have an average density of 1.2 g/cm 3 to 3 g/cm 3 and/or wherein the cleaning particles have an average particle size of from 1 to 10 mm and/or wherein the cleaning particles are ellipsoidal, spherical, cylindrical or cuboid.

9. The cleaning particles according to claim 1 , wherein the hydrophilic material is dispersed throughout the cleaning particle.

10. A method for producing thermoplastic polyamide particles according to claim 1 by extruding the ingredients and subsequently shaping.

11. The method according to claim 10 , wherein the shaping is a pelletizing.

12. A cleaning composition comprising cleaning particles comprising a thermoplastic polyamide and a hydrophilic material, at least part of which is located inside the cleaning particle, said cleaning particles having an average particle size of from 1 to 20 mm and a liquid medium,
wherein the hydrophilic material comprises a surfactant, a dye transfer inhibitor (DTI), a builder, or a polyether and is present in an amount of from 0.1 to 40 wt %, and
wherein the cleaning particles additionally comprise 5 wt % to 75 wt % of a filler.

13. The cleaning particles according to claim 2 , wherein the surfactant is an anionic surfactant having a sulfonate and/or sulfate group.

14. The cleaning particles according to claim 3 , wherein the dye transfer inhibitor comprises a polymer having vinyl pyrrolidine repeat units and the builder is a polymer comprising carboxylic acid groups or salts thereof or is a polyether.

15. The cleaning particles according to claim 7 , wherein the thermoplastic polyamide comprises nylon-6, nylon-6.6, nylon-6-10, or a copolymer or blend thereof.

16. The cleaning particles of claim 1 , wherein the filler comprises a particulate inorganic filler.

17. The cleaning composition of claim 12 wherein the liquid medium is aqueous.

18. The cleaning particles of claim 4 wherein the polymer comprises repeat units obtained by polymerizing one or more of the monomers selected from acrylic acid, methacrylic acid and maleic acid, in the form of the free acid or salt thereof.

Assignees

• Basf Se

Inventors

• Kniesel Simon
• Kloke Philipp
• Schoemer Martina
• Sathyanarayana Shyam Sundar

Classifications

• C11D17/06 Primary

  Powder; Flakes; Free-flowing mixtures; Sheets · CPC title

• C11D3/3719 Primary

  Polyamides or polyimides · CPC title

• C11D1/22

  derived from aromatic compounds · CPC title

• C11D17/0065

  Solid detergents containing builders (C11D17/06 takes precedence) · CPC title

• C11D3/0021

  Dye-stain or dye-transfer inhibiting compositions · CPC title