Methods and compositions for treating laundry items

Patent metadata

Field	Value
Publication number	US-10011935-B2
Application number	US-201414160625-A
Country	US
Kind code	B2
Filing date	Jan 22, 2014
Priority date	Mar 15, 2013
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

Abstract

A reduced dye transfer cycle of operation for a laundry treating appliance having a treating for receiving laundry for treatment includes a treating chemistry application phase where a treating chemistry is supplied to the treating chamber, the treating chemistry including at least one water soluble cationic dye absorber, a surfactant system, and an emulsifier.

First claim

What is claimed is:

1. A method of operating a laundry treating appliance having a treating chamber for receiving laundry for treatment, the method comprising:
a treating chemistry application phase where a treating chemistry is supplied to the treating chamber along with water to form a laundry treating solution, with the treating chemistry comprising:
at least one water soluble cationic dye absorber;
a surfactant system comprising at least one surfactant; and
an emulsifier comprising particulates;

a dye dispersion phase where a Pickering emulsion is formed by the interaction of the particulates with dye present in the laundry treating solution to disperse the dye within the laundry treating solution; and
a rinse phase, following the treating chemistry application phase, where rinse liquid is supplied to the treating chamber to rinse the laundry of the treating chemistry.

2. The method of claim 1 further comprising a load amount determining phase where a determination is made of an amount of the laundry in the treating chamber, and an amount of treating chemistry supplied to the treating chamber is based on the load amount.

3. The method of claim 2 wherein the load amount determining phase is based on a load amount selected by a user or an automatic determination of a load amount by the laundry treating appliance.

4. The method of claim 1 wherein during the treating chemistry application phase a predetermined amount of liquid is supplied to the treating chamber and an amount of the treating chemistry supplied to the treating chamber is based on the predetermined amount of liquid.

5. The method of claim 1 wherein the treating chemistry is at least one of the following: supplied directly to the treating chamber, recirculated through the treating chamber, or supplied as a component of a water mixture.

6. The method of claim 5 wherein the treating chemistry is passed through a dye filter as the treating chemistry is recirculated.

7. The method of claim 5 wherein the treating chamber is rotated during the supplying of the treating chemistry.

8. The method of claim 1 wherein the treating chemistry application phase occurs contemporaneously with at least one of a pre-wash phase or a wash phase.

9. The method of claim 1 further comprising a wash phase preceding the rinse phase.

10. The method of claim 9 further comprising a dye fixative phase where a dye fixative is supplied to the treating chamber prior to the treating chemistry application phase.

11. The method of claim 1 wherein the at least one water soluble cationic dye absorber comprises a zwitterionic dye absorber that is cationically charged during at least a portion of a cycle of operation.

12. The method of claim 1 wherein the at least one surfactant in the surfactant system comprises a cationic surfactant, a nonionic surfactant, or combinations thereof.

Assignees

• Whirlpool Co

Inventors

• Fulmer Gregory R
• Ghosh Kaustav
• Klein James W
• Leep Nicholas E
• Murch William L
• Quddus Mir A
• Schneemann Jason M

Classifications

• C11D3/0021

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

• C11D1/62

  Quaternary ammonium compounds · CPC title

• C11D1/72

  Ethers of polyoxyalkylene glycols · CPC title

• D06M13/402

  Amides {imides, sulfamic acids} · CPC title

• D06M13/395

  Isocyanates · CPC title