CA1046204A - Additive composition for textile bleaching baths - Google Patents
Additive composition for textile bleaching bathsInfo
- Publication number
- CA1046204A CA1046204A CA256,089A CA256089A CA1046204A CA 1046204 A CA1046204 A CA 1046204A CA 256089 A CA256089 A CA 256089A CA 1046204 A CA1046204 A CA 1046204A
- Authority
- CA
- Canada
- Prior art keywords
- additive composition
- grams
- urea
- zinc
- amounts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
Abstract of the Invention An additive composition in an aqueous vehicle for use in textile bleaching baths wherein textiles passed through bleaching baths modified by the addition thereto of the additive composition show improved characteristics including (1) perceptible increase in whiteness, and (2) more uniform distribution Or dyes applied to the bleached textile and a greater intensity of the colorant in the fabric. The additive composi-tion in aqueous form, comprises essentially, sodium zinc hexametaphosphate, zinc borate, and urea.
Description
- ~0~204 In order to secure a desired degree of whiteness in textile fabrics subject to conventional bleaching procedures, it is known in the art to use optical brighteners as modifiers for the bleaching baths. However, the use of such optical brighteners, in many cases has an adverse effect when the bleached fabric is dyed. Thus, in such cases, the dye may be deposited non-uniformly and may not have the desired degree of true intensity of the color-ant. Further, the colorant may have an undesired hue.
It would be advantageous to have an aqueous additive composition which may be used in aqueous form, and which may be incorporated in conven-tional baths for bleaching textiles, wherein the whiteness of the bleachedfabric is perceptibly enhanced without the need for optical brighteners.
It would also be advantageous to have an aqueous additive composi-tion of the character described, which when incorporated in textile bleaching baths, has the property of not only improving the whiteness characteristic of the bleached fabric, but further, improves the dyeing properties of the bleached fabric, including greater uniformity in the receptivity of the applied dye and an increase in intensity of the color of the applied dye.
It would furthermore be advantageous to have an aqueous additive composition of the character described for incorporation in textile bleaching baths, which eliminates the need for optical brighteners, and by omitting such optical brighteners, avoids undesired hues of the colorant applied in the dyeing of the bleached fabric.
Still further it would be advantageous to have an aqueous additive for textile bleaching baths of the character described whereby textile fab-rics derived or prepared from cotton, cotton-nylon blends and other natural or synthetic fibers and mixtures thereof bleached in such modified baths show perceptibly increased whiteness and when dyed show greater uniformity of distribution of the colorant in the fabric and improved receptivity of the colorant.
-1- ~ :' ~'. .
- . . ,. , . - ... ..
~' Accordingly the present invention provides an aqueous additive composition for addition to textile bleaching baths said composition com-prising water and effective relative amounts of the dry active ingredients, sodium zinc hexametaphosphate, zinc borate and urea.
In a preferred embodiment the dry ingredients comprise a relative ratio of from 85.0% to 90.0% sodium zinc hexametaphosphate, 0.74% to 1.4%
zinc borate and 8.3% to 14.0% urea, all by relative dry weight.
The present invention also provides an aqueous textile bleaching additive which contains effective relative amounts of the active ingredients sodium zinc hexametaphosphate, zinc borate and urea.
In accordance with the instant invention, conventional bleaching and after bleaching baths, such as the dilute hypochlorite and dilute perace-~ic baths may be modified by adding to such baths an aqueous additive compo-sition as described above.
An aqueous additive composition according to the present invention may be prepared by adding 792 grams of Calgon TG-10, otherwise known as sodium zinc hexametaphosphate to 9 gallons of distilled water at about 170 F, with stirring until dissolved. Nine grams of zinc borate and 120 grams of urea are successively added to the sodium zinc hexametaphosphate solution with stirring; followed by slow cooling to room temperature.
The thus prepared aqueous additive composition was used in a con-ventional textile bleaching bath, wherein dilute peracetic acid is the active bleaching agent. Thus, about 150 cc. of the aqueous additive composition was added to 35 gallons of the dilute peracetic acid held in a bleaching tank at a temperature of from 160 F to 180 F. 50tton fabric was processed through the successive steps of a conventional bleaching operation except that the aforesaid aqueous additive composition was added to the dilute peracetic bath as indicated above.
Upon comparing the bleached fabric processed with the aqueous 10462()4 additive composition of the instant invention, with bleached fabric processed with the same bleaching agent but without the aqueous additive composition;
it was apparent that the whiteness of the former processed fabric perceptibly exceeded the whiteness of the latter processed fabric.
Further, the bleached fabric which was processed with the aqueous additive composition of the instant invention, showed improved receptivity for dyes which were more uniformly distributed and had increased intensity.
The omission of optical brighteners avoided any variation in hue of the applied colorant.
The aqueous additive composition of the instant invention was also used in dilute (0.5%) hypochlorite bleaching baths, with about 2,000 cc. of the aqueous additive composition being admixed with 2200 gallons of the di- -~
lute hypochlorite solution. Fabrics processed in such modified bleaching baths resulted in perceptibly noticed increase in whiteness and improved dyeing characteristics including greater uniformity of distribution of color-ant and increased color intensity.
In addition to cotton fabrics, fabrics made of cotton-nylon blends, as well as other natural and synthetic fibers and mixtures thereof, bleached with the modified baths~as set forth above, showed improved whiteness and dyeing characteristics in the absence of optical brighteners.
The relative proportions of the several dry ingredients in the aqueous additive composition of the instant invention, may also be varied as indicated below:
Sodium Zinc Zinc Borate Urea hexametaphosphate (1) 700 grams 7.5 grams 95 grams
It would be advantageous to have an aqueous additive composition which may be used in aqueous form, and which may be incorporated in conven-tional baths for bleaching textiles, wherein the whiteness of the bleachedfabric is perceptibly enhanced without the need for optical brighteners.
It would also be advantageous to have an aqueous additive composi-tion of the character described, which when incorporated in textile bleaching baths, has the property of not only improving the whiteness characteristic of the bleached fabric, but further, improves the dyeing properties of the bleached fabric, including greater uniformity in the receptivity of the applied dye and an increase in intensity of the color of the applied dye.
It would furthermore be advantageous to have an aqueous additive composition of the character described for incorporation in textile bleaching baths, which eliminates the need for optical brighteners, and by omitting such optical brighteners, avoids undesired hues of the colorant applied in the dyeing of the bleached fabric.
Still further it would be advantageous to have an aqueous additive for textile bleaching baths of the character described whereby textile fab-rics derived or prepared from cotton, cotton-nylon blends and other natural or synthetic fibers and mixtures thereof bleached in such modified baths show perceptibly increased whiteness and when dyed show greater uniformity of distribution of the colorant in the fabric and improved receptivity of the colorant.
-1- ~ :' ~'. .
- . . ,. , . - ... ..
~' Accordingly the present invention provides an aqueous additive composition for addition to textile bleaching baths said composition com-prising water and effective relative amounts of the dry active ingredients, sodium zinc hexametaphosphate, zinc borate and urea.
In a preferred embodiment the dry ingredients comprise a relative ratio of from 85.0% to 90.0% sodium zinc hexametaphosphate, 0.74% to 1.4%
zinc borate and 8.3% to 14.0% urea, all by relative dry weight.
The present invention also provides an aqueous textile bleaching additive which contains effective relative amounts of the active ingredients sodium zinc hexametaphosphate, zinc borate and urea.
In accordance with the instant invention, conventional bleaching and after bleaching baths, such as the dilute hypochlorite and dilute perace-~ic baths may be modified by adding to such baths an aqueous additive compo-sition as described above.
An aqueous additive composition according to the present invention may be prepared by adding 792 grams of Calgon TG-10, otherwise known as sodium zinc hexametaphosphate to 9 gallons of distilled water at about 170 F, with stirring until dissolved. Nine grams of zinc borate and 120 grams of urea are successively added to the sodium zinc hexametaphosphate solution with stirring; followed by slow cooling to room temperature.
The thus prepared aqueous additive composition was used in a con-ventional textile bleaching bath, wherein dilute peracetic acid is the active bleaching agent. Thus, about 150 cc. of the aqueous additive composition was added to 35 gallons of the dilute peracetic acid held in a bleaching tank at a temperature of from 160 F to 180 F. 50tton fabric was processed through the successive steps of a conventional bleaching operation except that the aforesaid aqueous additive composition was added to the dilute peracetic bath as indicated above.
Upon comparing the bleached fabric processed with the aqueous 10462()4 additive composition of the instant invention, with bleached fabric processed with the same bleaching agent but without the aqueous additive composition;
it was apparent that the whiteness of the former processed fabric perceptibly exceeded the whiteness of the latter processed fabric.
Further, the bleached fabric which was processed with the aqueous additive composition of the instant invention, showed improved receptivity for dyes which were more uniformly distributed and had increased intensity.
The omission of optical brighteners avoided any variation in hue of the applied colorant.
The aqueous additive composition of the instant invention was also used in dilute (0.5%) hypochlorite bleaching baths, with about 2,000 cc. of the aqueous additive composition being admixed with 2200 gallons of the di- -~
lute hypochlorite solution. Fabrics processed in such modified bleaching baths resulted in perceptibly noticed increase in whiteness and improved dyeing characteristics including greater uniformity of distribution of color-ant and increased color intensity.
In addition to cotton fabrics, fabrics made of cotton-nylon blends, as well as other natural and synthetic fibers and mixtures thereof, bleached with the modified baths~as set forth above, showed improved whiteness and dyeing characteristics in the absence of optical brighteners.
The relative proportions of the several dry ingredients in the aqueous additive composition of the instant invention, may also be varied as indicated below:
Sodium Zinc Zinc Borate Urea hexametaphosphate (1) 700 grams 7.5 grams 95 grams
(2) 650 grams 6.7 grams 60 grams
(3) 600 grams 5.0 grams 70 grams Thus, the aqueous additive composition relative dry ingredients may also be made up of from about 85% to 90% sodium zinc hexametaphosphate; 1.0%
- 3 _ ~04~204 to 1.4% zinc borate; and 8.3% to 14.0% urea, all by weight, provides that such ingredients are made up with suitable amounts of distilled water, as set forth above.
It is understood that the aqueous additive composition of the in-stant invention may be used in textile bleaehing baths whieh inelude optical brighteners where it is not intended to dye the bleached fabric. In such case, bleached fabric processed with both aqueous additive composition and optical brighteners will have a whiteness perceptibly greater than the white-ness of a fabrie processed in bleaching baths including optical brighteners but without the aqueous additive composition of the instant invention.
It is further understood that the proportion of the solid ingre-dients of the additive to the water carrier thereof, may be varied to suit particular bleaching operations. Also, the proportion of the aqueous addi-tive composition to a given bleaching bath containing the aetive bleaehing agent, may be adjusted to suit the specific bleaching agent and the nature of the fabric being bleached.
- 3 _ ~04~204 to 1.4% zinc borate; and 8.3% to 14.0% urea, all by weight, provides that such ingredients are made up with suitable amounts of distilled water, as set forth above.
It is understood that the aqueous additive composition of the in-stant invention may be used in textile bleaehing baths whieh inelude optical brighteners where it is not intended to dye the bleached fabric. In such case, bleached fabric processed with both aqueous additive composition and optical brighteners will have a whiteness perceptibly greater than the white-ness of a fabrie processed in bleaching baths including optical brighteners but without the aqueous additive composition of the instant invention.
It is further understood that the proportion of the solid ingre-dients of the additive to the water carrier thereof, may be varied to suit particular bleaching operations. Also, the proportion of the aqueous addi-tive composition to a given bleaching bath containing the aetive bleaehing agent, may be adjusted to suit the specific bleaching agent and the nature of the fabric being bleached.
Claims (8)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An aqueous composition for addition to textile bleaching baths, said composition comprising water and effective relative amounts of the dry active ingredients sodium zinc hexametaphosphate, zinc borate and urea.
2. A composition according to claim 1 wherein said ingredients com-prise from 85.0% to 90.0% sodium zinc hexametaphosphate, 0.74% to 1.4% zinc borate and 8.3% to 14.0% urea, all by relative dry weight.
3. A composition according to claim 1 wherein the said dry sodium zinc hexametaphosphate comprises about 87.0%; said zinc borate comprises about 1.0%; said urea comprises about 13.0%, all by relative dry weight.
4. A composition according to claim 1, wherein said aqueous medium comprises about 34 liters having dispersed therein sodium zinc hexametaphos-phate in amounts of from 600 to 792 grams, said zinc borate in amounts of from 5.0 to 9.0 grams, and said urea in amounts of from 60 to 120 grams.
5. A composition according to claim 4, wherein said sodium zinc hexa-metaphosphate amounts to 792 grams, said zinc borate amounts to 9.0 grams, said urea amounts to 120 grams.
6. A textile bleaching bath to which has been admixed an aqueous additive composition according to claim 1.
7. A textile bleaching bath to which has been admixed an aqueous additive composition according to claim 1 wherein the active ingredients of said additive composition comprise from 85.0 to 90.0% sodium zinc hexameta-phosphate, 0.74% to 1.4% zinc borate and 8.3% to 14.0% urea, all by relative dry weight.
8. A textile bleaching bath to which has been admixed an additive composition according to claim 3, 4 or 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA256,089A CA1046204A (en) | 1976-06-30 | 1976-06-30 | Additive composition for textile bleaching baths |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA256,089A CA1046204A (en) | 1976-06-30 | 1976-06-30 | Additive composition for textile bleaching baths |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1046204A true CA1046204A (en) | 1979-01-16 |
Family
ID=4106329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA256,089A Expired CA1046204A (en) | 1976-06-30 | 1976-06-30 | Additive composition for textile bleaching baths |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1046204A (en) |
-
1976
- 1976-06-30 CA CA256,089A patent/CA1046204A/en not_active Expired
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