Hydrophilic index for aqueous, liquid laundry detergent compositions containing LAS

A composition and detergent technology, applied in the direction of surface-active detergent composition, detergent composition, soap detergent composition, etc., can solve the problems of high cost, imprecise, labor-intensive, etc.

Inactive Publication Date: 2002-01-23
THE PROCTER & GAMBLE COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of formulating various detergent compositions and testing the results is labor intensive, costly and imprecise
This is complicated by the large number of different surfactants available to detergent formulators

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0255] AE = alcohol ethoxylate

[0256] APA = aminopropylamine

[0257] AS = alkyl sulfate

[0258] #EO = average number of ethoxylated units per surfactant molecule

[0259] FA = fatty acid

[0260] CMG = N-cocoyl N-methylglucamine

[0261] LAS = linear alkylbenzene sulfonate

[0262] LTAC = lauryl trimethyl ammonium chloride

[0263] MEA = Monoethanolamine

[0264] Polymer A = Tetraethylenepentamine with an average degree of ethoxylation of 15

[0265] RPS = rapeseed

[0266] TMS / TDS = mixture of tartrate monosuccinate and tartrate disuccinate

[0267] S = Sulfate

Embodiment I

[0269] Table I illustrates how to calculate the Hydropathic Index for various surfactants conventionally used in laundry detergents. In the table below, "Cn" is the average chain length of the molecular surfactant, and "Phobe" represents the molecular weight of the hydrophobic part of the surfactant molecule. Similarly, "Phil" is the molecular weight of the hydrophilic portion of the surfactant molecule. "Total" is the sum of the molecular weights of the hydrophobic and hydrophilic moieties, which is the average molecular weight of the surfactant molecule. "WF Phil" is the weight fraction of the hydrophilic portion, that is, the molecular weight of the hydrophilic portion divided by the total molecular weight. "HL S " is WFphil multiplied by 20. For ionic surfactants, only the HI of the surfactant ion is calculated S value, that is, regardless of the counterion.

[0270] Surfactant

Embodiment II

[0272] The following compositions are used to illustrate the importance of the hydropathic index of the present invention. Compositions A and B in Table IIA were prepared according to the invention. Compositions C to J in Tables IIC and IID are compositions outside the scope of the present invention and are provided for comparison purposes only. Compositions A and B generally have superior cleaning performance compared to prior art compositions outside the scope of the present invention.

[0273] Surfactant

HI S

A

B

anionic surfactant

C25AE1.8S

9.59

20.5

C11.8LAS

4.79

6

3

C45E1.0S

8.14

22.5

nonionic surfactant

AE23-9

14.02

2

3

cationic surfactant

C10APA

8.35

1.5

1.5

% of total surfactant

30

30

% of LAS ...

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PUM

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Abstract

A heavy duty liquid laundry detergent composition having a surfactant system. The surfactant system comprises from about 0.1 % to about 20 %, by weight of the surfactant system of an alkyl benzene sulfonate surfactant, and the surfactant system has a Hydrophilic Index, HIC, of from about 8 to about 9.2. The Hydrophilic Index is calculated as follows: HIC = SIGMA y (weight % of surfactant y in the surfactant system) x (HISy), HISy is calculated for each of the surfactants in the surfactant systems as follows: HISy = 20 x (the molecular weight of the hydrophilic portion of surfactant component y) / (the molecular weight of surfactant component y).

Description

technical field [0001] The present invention relates to stable, aqueous heavy duty liquid laundry detergent compositions comprising linear alkylbenzene sulfonates and other surfactants, and fatty acids. The surfactant system is selected by calculating the optimum hydropathic index so that the detergent composition provides superior cleaning performance. Background of the invention [0002] The art is replete with examples of laundry detergent compositions having good cleaning performance. While some of these are liquids, the formulation of liquid detergent compositions poses many problems to the formulator, including how to optimize the surfactants for optimum cleaning performance. [0003] Past attempts to formulate liquid laundry detergent compositions have included the use of various surfactants and combinations of surfactants. Formulators generally rely on experimental methods to determine the optimal surfactant system. The process of formulating various detergent com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D1/04C11D1/22C11D1/94C11D3/04C11D3/06C11D3/10C11D3/20C11D3/33C11D3/36C11D3/37C11D3/386C11D3/40C11D3/50C11D10/02C11D17/00C11D17/08
CPCC11D1/22C11D3/38618
Inventor P·K·雷迪E·S·萨德洛夫斯基R·W·波斯维尔J·W·恩格利斯三世
Owner THE PROCTER & GAMBLE COMPANY
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