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Laundry detergent composition containing a violet colorant

A technology of laundry detergent and composition, applied in the direction of washing composition dyes, etc.

Inactive Publication Date: 2007-01-31
COLGATE PALMOLIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, a problem encountered with the use of bluing agents in detergent products is that when used in excessive amounts, white fabrics appear blue; looks whiter is invalid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The washing load consisting of cotton fabric and cotton rich blend is washed with detergent and a detergent containing purple CT in ambient water. Soak the load for 1 / 2 hour and then wash. In addition, the use of chlorine bleach and fabric softener was evaluated. The load is divided into two parts, one half is dried with a dryer, and the other half is dried outdoors. After 5 and 10 washing cycles, a visual evaluation was performed. Ask the 10-member expert panel: "Which one looks whiter and brighter?". The visual results are as follows:

[0034] Table 1

[0035] Dry

Dryer drying

Washing

5th

10th

5th

10th

Separate detergent

99% C.L.

Purple CT

99% C.L.

Purple CT

99% C.L.

Purple CT

99% C.L.

Purple CT

Detergent + bleach

Equal

Equal

Equal

95% C.L.

Purple CT

Detergent+

Fabric softener

95% C.L.

Purple CT

95% C.L.

Purple CT

Equal

95% C.L.

Purple C...

Embodiment 2

[0039] Evaluation of purple CT-detergent base material

[0040] The washing load consisting of cotton fabric and cotton rich blend is washed with detergent and a detergent containing purple CT in ambient water. Soak the load for 1 / 2 hour and then wash. The load is divided into two parts, one half is dried with a dryer, and the other half is dried outdoors. After 5 washing cycles, a visual evaluation was performed. Ask the 10-member expert panel: "Which one looks whiter and brighter?". The visual results are as follows:

[0041] Table 2

[0042] Dry

Dryer drying

Detergent comparison

From the north

Daylight

Incandescent light

From the north

Daylight

Incandescent light

1.2% purple CT

Purple CT+Neodol 25-7

On the detergent base

99% C.L.

Purple CT

99% C.L.

Purple CT

95% C.L.

Purple CT

95% C.L.

Purple CT

1.8% purple CT

Purple CT+Accusol 455

On the detergent base

90% C.L. ...

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Abstract

A laundry detergent composition and method of providing whitening benefits is described for providing enhanced whitening benefits to washed laundry comprising: (a) a surfactant or surfactant mixture selected from the group consisting of anionic and nonionic surfactants; and (b) a violet polymeric colorant having an absorption wavelength of from 540 to 560 nm; a solubility in water of from about 1 gram per Liter to 20.5 grams per Liter; and wherein the dosage of said violet colorant in the laundry detergent composition is from about 0.006% to about 1.75%.

Description

[0001] The present invention relates to laundry detergent compositions that provide increased whitening benefits to laundry. More specifically, the present invention relates to a laundry detergent composition comprising a purple colorant that can reflect purple light and can be deposited on the surface of the fabric being washed to provide a whitening effect or benefit. Background technique [0002] It is known to use optical brighteners and bluing agents in detergent compositions to increase the perceived visual whiteness of white fabrics. A typical bluing agent has an absorption wavelength of 580-620 nm, which gives a true blue color. Optical brighteners, sometimes called fluorescent dyes, absorb invisible ultraviolet light and emit light in the blue region of the visible spectrum. Ordinary people seem to prefer white items with a slight bluish on them, such as washed fabrics. Therefore, optical brighteners have been commonly used in laundry detergents for whitening fabrics. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D3/40
CPCC11D3/40
Inventor C·J·小施拉姆R·O·麦迈克尔C·A·巴博
Owner COLGATE PALMOLIVE CO