Laundry detergent

Patent metadata

Field	Value
Publication number	US-9951300-B2
Application number	US-201514821837-A
Country	US
Kind code	B2
Filing date	Aug 10, 2015
Priority date	Aug 11, 2014
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

Liquid laundry detergent compositions containing a microcapsule with a cationically charged coating and a fluorescent brightener with a distyrylbiphenyl unit, preferably Fluorescent Brightener-49, are provided. The compositions provide improved delivery efficiency of microcapsules and brightening of fabric while minimizing phase stability issues.

First claim

What is claimed is:

1. A liquid laundry detergent composition comprising:
a) 0.1% to 25%, by weight of the composition, of a surfactant, wherein said surfactant comprises 0.1% to 15%, by weight of the composition, of an anionic surfactant, and 0.1% to 15%, by weight of the composition, of a nonionic surfactant;
b) 0.01% to 5%, by weight of the composition, of microcapsules, wherein said microcapsules comprises: a shell comprising an outer surface, said shell comprises a melamine formaldehyde, a core encapsulated within said shell, said core comprises a perfume oil, and a coating on said outer surface, wherein said coating is cationically charged, said coating comprises an efficiency polymer that is a polyvinyl formamide; and
c) 0.001% to 0.5%, by weight of the composition, of a fluorescent brightener comprising a distyrylbiphenyl unit, wherein the fluorescent brightener is 2,2′-([1,1′-Biphenyl]-4,4′-diyldi-2,1-ethenediyl)bis-benzenesulfonic acid disodium salt (“Fluorescent Brightener 49”).

2. The composition according to claim 1 , wherein the composition comprises from 1% to 25%, by weight of the composition, of the surfactant.

3. The composition according to claim 1 , wherein the pH is below 9.

4. The composition according to claim 3 , wherein the pH is from pH 6.5 to below pH 8.0.

5. The composition according to claim 1 , wherein said efficiency polymer further comprises a polymer selected from the group consisting of polyvinyl amine, polyallyl amine, and copolymers thereof.

6. The composition according to claim 1 , further comprising a rheology modifier selected from the group consisting of hydroxy-containing crystalline rheology modifier, polyacrylate, polysaccharide, polycarboxylate, alkali metal salt, alkaline earth metal salt, ammonium salt, alkanolammonium salt, C 12 -C 20 fatty alcohol, di-benzylidene polyol acetal derivative rheology modifier, di-amido gellant rheology modifier, a cationic polymer comprising a first structural unit derived from methacrylamide and a second structural unit derived from diallyl dimethyl ammonium chloride, and a combination thereof.

7. The composition according to claim 1 , where the composition is substantially free of any other fluorescent brighteners.

8. The composition according to claim 1 , wherein the composition comprises from 0% to less than 5%, by weight of the composition, of a hydrotrope.

9. The composition according to claim 8 , wherein the hydrotrope is selected from the group consisting of toluene sulfonic acid, xylene sulfonic acid, cumene sulfonic acid, or a salt thereof.

10. The composition according to claim 1 , wherein said composition further comprises
0.05% to about 1%, by weight of the composition, of a hydrogenated castor oil.

11. The composition according to claim 10 ,
wherein the composition is substantially free of any other fluorescent brighteners other than Fluorescent Brightener 49;
wherein a pH of the composition is below 8; and
wherein the composition comprises from 0% to 3% of a cumene sulfonic acid or salt thereof.

12. A water soluble unit dose form of a laundry detergent article, comprising at least a first compartment and a second compartment,
wherein the first compartment contains a first composition comprising the liquid laundry detergent composition according to claim 1 ; and
wherein the second compartment contains a second composition comprising a fluorescent brightener that includes a diaminostilbene unit, and wherein the second composition is substantially free of a microcapsule having a cationically charged coating.

13. The article of claim 12 ,
wherein the first composition further comprises a hydrogenated castor oil.

14. The article of claim 12 , and wherein the first composition is substantially free of any other fluorescent brightener other than Fluorescent Brightener 49.

15. The article of claim 12 , wherein the fluorescent brightener in the second composition is disodium 4,4′-bis{[4-anilino-6-morpholino-s-triazin-2-yl]-amino}-2,2′-stilbenedisulfonate (“Fluorescent Brightener 15”).

Assignees

• Procter & Gamble

Inventors

• Liu Xiaoyan
• Ramirez-Almaraz Amaranta
• Lv Li
• Huang Xu

Classifications

• C11D17/043

  Liquid or thixotropic (gel) compositions · CPC title

• C11D17/044

  Solid compositions · CPC title

• C11D3/505

  encapsulated or adsorbed on a carrier, e.g. zeolite or clay · CPC title

• C11D3/42 Primary

  Brightening agents {; Blueing agents} · CPC title

• C11D17/0039

  Coated compositions or coated components in the compositions, (micro)capsules · CPC title