Claims
- 1. A process for providing improved whiteness to cellulosic fabric comprising the steps of:
a) contacting cellulosic fabric with first a composition comprising:
i) from about 0.05% to about 2% by weight, of hydrogen peroxide or a source of hydrogen peroxide; ii) from 0.01% to about 10% by weight, of a source of alkalinity; iii) from about 0.001% to about 2% by weight, of a bleach stabilizer; and iv) the balance carriers and other adjunct ingredients: wherein the composition has a pH of from about 7 to about 12; at a temperature from about 50° C. to about 80° C. for a period of time from about 5 minutes to about 60 minutes to form a treated fabric; and b) rinsing the treated fabric with a second composition comprising:
i) water; and ii) optionally rinse aids and other adjunct ingredients; to provide a finished fabric.
- 2. The process of claim 1 wherein the first composition comprises from about 0.1% to about 1% by weight, of hydrogen peroxide or a source thereof.
- 3. The process of claim 2 wherein the first composition comprises from about 0.1% to about 0.5% by weight, of hydrogen peroxide or a source thereof.
- 4. The process of to claim 1 wherein the source of hydrogen peroxide is selected from the group consisting of perborate, percarbonate, and mixtures thereof.
- 5. The process of claim 1 wherein the source of alkalinity is a base selected from the group consisting of alkali metal, alkali earth metal, ammonium, and alkyl ammonium hydroxides, hydrogen carbonates, carbonates, phosphates, hydrogen phosphates, dihydrogen phosphates, and mixtures thereof.
- 6. The process of claim 5 wherein the source of alkalinity is sodium hydrogen carbonate, sodium carbonate, sodium hydroxide, or mixtures thereof.
- 7. The process of claim 1 wherein the bleach stabilizer is sodium silicate.
- 8. The process of claim 1 wherein the bleach stabilizer is selected from the group consisting of hydroxycarboxylates, amino carboxylates, organophosphonates, and mixtures thereof.
- 9. The process of claim 8 wherein the hydroxycarboxylate stabilizer is gluconic acid, glucoheptonic acid, or mixtures thereof.
- 10. The process of claim 8 wherein the amino carboxylate stabilizer is nitrilotriacetic acid, ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, or mixtures thereof.
- 11. The process of claim 8 wherein the organophosphonates stabilizer is aminotri (methylenephosphonic acid), 1-hydroxethylidene-1,1-diphosphonic acid, ethylenediaminetetra (methylenephosphonic acid), diethylenetriaminepenta (methylenephosphonic acid), and mixtures thereof.
- 12. The process of claim 1 wherein the composition of step (a) comprises one or more optical brighteners selected from the group consisting of bis(triazinyl)stilbenes, nonionic distyrl-arenes, 1,3-diphenyl-2-pyrazolines, naphthalimides, coumarins, bis(benzoxazoles), cationic azoles, and mixtures thereof.
- 13. The process of claim 1 wherein step (a) is conducted at a temperature of from about 60° C. to about 65° C.
- 14. The process of claim 1 wherein step (a) is conducted for a period of time from about 15 minutes to about 25 minutes.
- 15. The process of claim 1 wherein step (a) is conducted at a pH of from about 8 to about 9.
- 16. A process for providing improved whiteness to cellulosic fabric which has been treated in a previous step with formaldehyde, the process comprising the steps of:
a) contacting cellulosic fabric exposed to formaldehyde with a first composition comprising:
i) from about 0.05% to about 0.5% by weight, of hydrogen peroxide or a source of hydrogen peroxide; ii) from 0.01% to about 10% by weight, of a source of alkalinity; iii) from about 0.001% to about 0.5% by weight, of a bleach stabilizer; and iv) the balance carriers and other adjunct ingredients: wherein the composition has a pH of from about 7 to about 12; at a temperature from about 50° C. to about 80° C. for a period of time from about 5 minutes to about 60 minutes to form a treated fabric; and b) rinsing the treated fabric with a second composition comprising:
i) water; and ii) optionally rinse aids and other adjunct ingredients; to provide a finished fabric having less than 75 ppm residual formaldehyde.
- 17. A process for providing improved whiteness to cellulosic fabric comprising the steps of:
a) contacting cellulosic fabric with a first composition comprising:
i) from about 0.05% to about 0.5% by weight, of hydrogen peroxide or a source of hydrogen peroxide; ii) from 0.01% to about 10% by weight, of a source of alkalinity selected from sodium hydrogen carbonate, sodium carbonate, or mixtures thereof; iii) from about 0.001% to about 0.5% by weight, of a sodium silicate; iv) from about 0.01% to about 3% by weight, of an optical brightener; and v) the balance carriers and other adjunct ingredients: wherein the composition has a pH of from about 7 to about 12; at a temperature from about 50° C. to about 80° C. for a period of time from about 5 minutes to about 60 minutes to form a treated fabric; and b) rinsing the treated fabric with a second comprising:
i) water; and ii) optionally rinse aids and other adjunct ingredients.
- 18. A process for providing improved whiteness to cellulosic fabric comprising the steps of:
a) contacting fabric which contains formaldehyde with a roller or a pad which delivers onto the fabric a composition comprising:
i) from about 0.05% to about 0.5% by weight, of hydrogen peroxide or a source of hydrogen peroxide; ii) from 0.01% to about 10% by weight, of a source of alkalinity selected from sodium hydrogen carbonate, sodium carbonate, or mixtures thereof; iii) from about 0.001% to about 0.5% by weight, of a sodium silicate; iv) from about 0.01% to about 3% by weight, of an optical brightener; and v) the balance carriers and other adjunct ingredients: wherein the composition has a pH of from about 7 to about 12; at a temperature from about 50° C. to about 80° C. for a period of time from about 5 minutes to about 60 minutes to form a treated fabric; and b) exposing the alkaline treated fabric to an atmospheric steam chamber to produce a treated fabric, said fabric having less than about 75 ppm formaldehyde.
- 19. The process of claim 18 wherein the atmospheric steam chamber is at a temperature of from about 90° C. to about 100° C.
- 20. The process of claim 18 wherein the composition a pH of from about 8 to about 9.
- 21. The process of claim 18 wherein the composition comprises about 10% by weight of sodium hydrogen carbonate.
- 22. The process of claim 18 wherein the alkaline treated fabric is exposed to the steam chamber for about 5 minutes.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application claims priority under 35 U.S.C. §119(e) to U.S. Provisional Application Serial No. 60/340,892, filed Dec. 7, 2001 (Attorney Docket No. 8802P).
Provisional Applications (1)
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Number |
Date |
Country |
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60340892 |
Dec 2001 |
US |