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Photo Bleach Compositions

a technology of compositions and bleaching, applied in the field of photo bleaching compositions, can solve the problems of difficult to formulate stable versions of such systems, system volume efficiency, and photo bleaching system tend to be less effectiv

Inactive Publication Date: 2005-12-29
THE PROCTER & GAMBLE COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005] These and other aspects, features and advantages will become apparent to those of ordinary skill in the art from a reading of the following detailed description and the appended claims.

Problems solved by technology

Unfortunately it is difficult to formulate stable versions of such systems and such systems are not volume efficient as the requisite bleaching components make up a large volume of any formulation.
While photobleaching systems do not suffer from the formulation and volume issues of hydrogen peroxide systems, photobleaching systems tend to be less effective as the short life of the bleaching species requires that photosensitizer, oxygen, light and the situs to be bleach be present simultaneously.
In addition, the choice of effective photobleaches used in traditional photobleaching systems is limited as photobleaches generally must be capable of being adsorbed on the soiled portion of the situs.

Method used

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  • Photo Bleach Compositions

Examples

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Effect test

example 1

[0050] The following bleach composition is prepared by combining sulphonated zinc phthalocyanine, imidazole and the cleaning adjuncts while avoiding exposure to light.

Sulphonated zinc phthalocyanine0.1%Imidazole  1%Cleaning adjunctsBalance

100 grams of the above described bleach composition is added to 30 liters of aqueous wash liquor in a suitable washing machine and the wash liquor is illuminated with a light source emitting in at least one of the absorbance peaks of the sulphonated zinc phthalocyanine while being agitated for a period of 15 minutes. The wash liquor is removed and the fabrics are rinsed.

example 2

[0051] The following bleach composition is prepared by combining silicon phthalocyanine-di-isoPEG 384, benzofuran carboxylic acid and the cleaning adjuncts while avoiding exposure to light.

Silicon phthalocyanine-di-isoPEG 3840.01%Benzofuran carboxylic acid 0.5%Cleaning adjunctsBalance

100 grams of the above described bleach composition is added to 30 liters of aqueous wash liquor in a suitable washing machine and the wash liquor is illuminated with a light source emitting in at least one of the absorbance peaks of the silicon phthalocyanine-di-isoPEG 384 while being agitated for a period of 15 minutes. The wash liquor is removed and the fabrics are rinsed.

example 3

[0052] The following bleach composition is prepared by combining acridine carboxylic acid, 2-furoic acid and the cleaning adjuncts while avoiding exposure to light.

Acridine carboxylic acid0.5%2-furoic acid  5%Cleaning adjunctsBalance

100 grams of the above described bleach composition is added to 30 liters of aqueous wash liquor in a suitable washing machine and the wash liquor is illuminated with a light source emitting in at least one of the absorbance peaks of the acridine carboxylic acid while being agitated for a period of 15 minutes. The wash liquor is removed and the fabrics are rinsed.

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Abstract

The present invention relates to compositions comprising a photosensitizer that can be used to provide aqueous fluids with bleaching capabilities, aqueous fluid photobleaching compositions having bleaching capabilities and processes of making and using same. Such compositions can provide bleaching and / or cleaning benefits that are similar to or better than hydrogen peroxide bleaching systems.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS [0001] This application claims priority under 35 U.S.C. § 119(e) to U.S. Provisional Application Ser. No. 60 / 582,705 filed Jun. 24, 2004.FIELD OF THE INVENTION [0002] The present invention relates to photobleaching compositions having bleaching capabilities, and processes of making and using same. BACKGROUND OF THE INVENTION [0003] Conventional bleaching compositions typically employ hydrogen peroxide as a bleaching species or as an intermediate that is converted into a peracid. Such systems can provide effective bleaching. Unfortunately it is difficult to formulate stable versions of such systems and such systems are not volume efficient as the requisite bleaching components make up a large volume of any formulation. While photobleaching systems do not suffer from the formulation and volume issues of hydrogen peroxide systems, photobleaching systems tend to be less effective as the short life of the bleaching species requires that photosensi...

Claims

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Application Information

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IPC IPC(8): C11D3/00C11D3/40C11D3/42C23G1/06
CPCC11D3/0063C11D3/40D06L3/04C11D11/0017D06L3/021C11D3/42D06L4/12D06L4/50C11D2111/12
Inventor WILLEY, ALAN DAVIDJEFFREYS, BRIANHARRIMAN, ANTHONYGARTSTEIN, VLADIMIR
Owner THE PROCTER & GAMBLE COMPANY
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