Granted Patent B2

US 12,448,587 · App. 18/255,592 · Granted Oct 21, 2025

Inventors: Ivana Trombetta (Casalpusterlengo, IT); Serena Pezzia (Casalpusterlengo, IT); Luca Pretali (Casalpusterlengo, IT); Lorena Galluzzi (Casalpusterlengo, IT)

Assignee: Conopco Inc.

C11D1/29C11D1/90C11D3/046C11D17/0008C11D2111/16C11D2111/18

Abstract

Claims (59)

1. A liquid aqueous detergent composition comprising,

a. 8 to 30 wt % of a surfactant system comprising,

i. primary surfactant being anionic surfactant comprising

a surfactant A of formula I: (R 1 —(OR′) n —O—SO 3 − ) x M x+ ,

wherein:

R 1 is saturated or unsaturated C 8 -C 16 alkyl chain;

R′ is ethylene;

n is from 1 to 15;

x is equal to 1 or 2;

M x+ is a suitable cation which provides charge neutrality selected from sodium, calcium, potassium and magnesium; and

a surfactant B of formula II: (R 1 —O—SO 3 − ) x M x+ ,

wherein:

R 1 is saturated or unsaturated C 8 -C 16 alkyl chain;

x is equal to 1 or 2;

M x+ is a suitable cation which provides charge neutrality selected from sodium, calcium, potassium and magnesium; and

ii. secondary surfactant being amphoteric surfactant comprising betaine;

b. 0.001 to 0.2 wt % of polyethylene oxide having a molecular weight higher than 200,000 g/mol;

c. 0.1 to 5 wt % of an inorganic salt selected from the group consisting of sodium chloride, magnesium sulphate, sodium sulphate and combinations thereof;

wherein:

the weight ratio of surfactant A to surfactant B is smaller than or equal to 1.5;

the ratio of average EO of surfactant A and surfactant B combined to total amount of surfactant B is smaller than or equal to 0.45;

the weight ratio of primary surfactant to secondary surfactant is in the range from 4:1 to 8:1; and

the surfactant system is free of alkylbenzene sulphonates and derivatives thereof; and

wherein the average EO is defined as the weighted mean of the percentages of each EO adduct, with EO number comprised between 0 and 15 present in surfactants A and B,

Σ

n

=

0

i

⁢

X

⁢

n

⁢

m

*

EOn

Σ

n

=

0

i

⁢

EOn

wherein Xnm is the % of the n th ethoxylation adduct into anionic surfactant m, where m may be either A or B and EOn is the ethoxylation degree of the n th ethoxylation adduct.

2. The composition according to claim 1 , wherein the primary surfactant comprises sodium lauryl ether sulphate having 1 to 2 ethylene oxide units per molecule.

3. The composition according to claim 1 , wherein the weight ratio of surfactant A to surfactant B is smaller than or equal to 1.45.

4. The composition of claim 1 , wherein the ratio of (average EO of surfactant A and surfactant B combined) to (total amount of surfactant B) is smaller than or equal to 0.43.

5. The composition according claim 1 , wherein the secondary surfactant comprises betaine selected from alkyl betaine, alkyl amido betaine, alkyl amidopropyl betaine, alkyl sulphobetaine, alkyl phosphobetaine and combinations thereof.

6. The composition according to claim 5 , wherein the betaine is cocamidopropyl betaine (CAPB).

7. The composition according to claim 1 , wherein the weight ratio of primary surfactant to secondary surfactant is in the range from 4:1 to 7:1.

8. The composition according to claim 1 , wherein the amount of surfactant system is from 8 to 25 wt %.

9. The composition according to claim 1 , wherein the polyethylene oxide has a molecular weight of 500,000 g/mol to 3,000,000 g/mol.

10. The composition according to claim 1 , wherein the composition has a pH in the range of 4 to 8.

11. The composition according to claim 1 , wherein the composition has a viscosity in the range of 1000 to 2700 cps at 21 sec −1 measured on a Haake Viscometer (Models include VT181, VT501, VT550 or equivalent) with “cup” and “bob” geometry, equipped with a MV cup and a MV2 bob at a controlled temperature of 25° C.

12. A method of cleaning a hard surface comprising the steps:

a. contacting the hard surface, optionally in diluted form, with the liquid detergent composition according to claim 1 , and

b. removing the detergent composition from the hard surface, optionally by rinsing with water.

13. The method of cleaning according to claim 12 , wherein the hard surface is dishware.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (40)