Leuco colorants as bluing agents in laundry care compositions

Patent metadata

Field	Value
Publication number	US-12049608-B2
Application number	US-201715800111-A
Country	US
Kind code	B2
Filing date	Nov 1, 2017
Priority date	Nov 1, 2016
Publication date	Jul 30, 2024
Grant date	Jul 30, 2024

Abstract

A laundry care composition including: (a) at least one laundry care ingredient and (b) a leuco composition. The laundry care composition has a ΔHA of at least 10. Methods of treating textiles with such laundry care compositions.

First claim

We claim:

1. A laundry care composition comprising: (a) at least one laundry care ingredient and (b) a leuco composition, wherein the laundry care composition has a ΔHA of at least 10, wherein the leuco composition is a compound according to formula (I)

wherein the ratio of Formula I to its oxidized form is at least 1:3;
wherein all of the R o and R m groups on all three rings A, B or C are hydrogen and all three R p are —NR 1 R 2 ;
wherein G is hydrogen;
wherein R 1 and R 2 are independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, alkaryl, substituted alkaryl, and R 4 ; R 4 is a organic group composed of one or more organic monomers with said monomer molecular weights ranging from 28 to 500;
wherein any charge present in any of the compounds is balanced with a suitable independently selected internal or external counterion, wherein at least one of R 1 and R 2 is an R 4 that comprises at least two monomers, wherein the leuco composition is uncolored and undergoes color change only when contacted with a triggering agent, wherein the laundry care composition comprises an antioxidant.

2. The laundry care composition of claim 1 , wherein the laundry care composition has a ΔHA of at least 25.

3. The laundry care composition of claim 1 , wherein the laundry care composition has a ΔHA of at least 90.

4. The laundry care composition of claim 1 , wherein R 4 is selected from the group consisting of alkyleneoxy, oxoalkyleneoxy, oxoalkyleneamine, epichlorohydrin, quaternized epichlorohydrin, alkyleneamine, hydroxyalkylene, acyloxyalkylene, carboxyalkylene, carboalkoxyalkylene, and sugar.

5. The laundry care composition of claim 1 , wherein the laundry care ingredient is selected from the group consisting of surfactants, builders, chelating agents, dye transfer inhibiting agents, dispersants, enzymes, enzyme stabilizers, catalytic materials, bleach activators, polymeric dispersing agents, clay soil removal agents, anti-redeposition agents, brighteners, suds suppressors, dyes, perfume, perfume delivery systems, structurants, fabric softeners, carriers, hydrotropes, processing aids, pigments and mixtures thereof.

6. The laundry care composition of claim 1 having a Transparency Rating of at least 1.

7. A method for treating textile articles comprising the steps of: (a) providing the laundry care composition of claim 1 ; (b) adding the laundry care composition to a liquid medium; (c) placing textile articles in the liquid medium; (d) optionally, rinsing the textile; and (e) drying the textile articles.

Assignees

• Procter & Gamble

Inventors

• Miracle Gregory Scot
• Ditullio Daniel Dale
• Valenti Dominick Joseph
• Dey Sanjeev Kumar
• Qin Haihu

Classifications

• C11D3/26

  containing nitrogen {(C11D3/162, C11D3/164, C11D3/166, C11D3/168 take precedence)} · CPC title

• C11D3/20

  containing oxygen {(C11D3/162, C11D3/164, C11D3/166, C11D3/168 take precedence)} · CPC title

• C11D3/187

  aromatic · CPC title

• C11D3/0084

  Antioxidants; Free-radical scavengers · CPC title

• C09B57/00

  Other synthetic dyes of known constitution · CPC title