direct dyes and reactive dyes Chelating dispersant RG-SPN
Main ingredient: Acrylic polymer
Appearance: Colorless to pale yellow clear viscous liquid
Physical and chemical indicators: PH value: The pH value of 10% solution is 7.5-8.5
Ionicity: Anionic
Solid content: 32±1%
Solubility: It can be diluted with water in any proportion.
Freezing point: -5ºC
Performance characteristics and uses:
The chelating dispersant RG-SPN has a very excellent dispersing effect on the alkaline earth metal ions, waxes, pectin substances and the precipitation of hard water contained in the raw cotton.
The chelating dispersant RG-SPN also has the effect of complexing metal ions, preventing the reduction of the affinity of the dyes for fibers and the reduction of dyeing brightness due to the influence of calcium and magnesium ions on the solubility of anionic dyes.
Even in hard water, vat dyes, such as indanthrene blue BC, can be fully absorbed by the fibers.
Prevents hydrolyzed reactive dyes from forming calcium salts, which are difficult to remove in hard water.
Since the chelating dispersant RG-SPN has a relatively mild complexation effect on metal ions, it will not extract complex ions such as copper and chromium contained in metal complex dyes, so it will not affect the activity and direct dyes containing complex metals. color and fastness.
The chelating dispersant RG-SPN has no surface activity, so it has almost no foam; it also has no affinity for anionic dyes.
This product can be used as pretreatment, dyeing, soaping auxiliaries, and has chelating, dispersing and protective colloid effects on hard water ions and other heavy metal ions, as well as impurities in dye baths;
When dyeing yarn and fabric, the chelating dispersant RG-SPN can prevent the precipitation and precipitation of hard water and other impurities;
As a reactive dye dyeing and printing soaping agent, the de-floating effect of lake blue and red color is more obvious;
As a pretreatment aid, it can prevent the formation of silica scale from water glass.
This product has the following characteristics:
Stability: This product is very stable to various acids, alkalis and electrolytes at the concentrations commonly used in dye liquors.
Compatibility: The chelating dispersant RG-SPN is compatible with anionic and nonionic products. With various cationic additives, precipitation will occur in acidic or neutral solutions, but not in alkaline solutions.
Ecological: Wastewater containing chelating dispersant RG-SPN can be removed very easily in biochemical wastewater treatment plants. This product does not contain phosphorus and APEO, nor does it release AOX into wastewater.
Instructions:
Due to its excellent complexing, dispersing and protective colloid effects, chelating dispersant RG-SPN can be widely used in pre-treatment, dyeing and soaping of cotton and its blended products.
Even in the continuous pad dyeing process, adding 1-2 g/L of chelating dispersant RG-SPN to the pad liquid can help dyeing.
1. Polyester/cotton blended dyeing
In the polyester-cotton dyeing process, if polyester is dyed first, the wax and pectin-like impurities released from the cotton will dissolve in the acid dye bath. However, when dyeing with vat dyes or reactive dyes later, the alkaline medium will These impurities are complexed with the dye to form a precipitate. Especially in the case of cheese dyeing, these deposits can be deposited in large quantities on the yarn, causing more serious problems such as blockage of the bath circulation.
The chelating dispersant RG-SPN can effectively prevent the occurrence of this kind of precipitation.
2. Vat dyeing cotton
Generally speaking, the high concentration of calcium and magnesium ions contained in raw cotton is difficult to control, and these metal ions easily react with vat dyes to form precipitates. Because the chelating dispersant RG-SPN has obvious complexing ability to calcium and magnesium ions, it can effectively prevent the occurrence of such precipitation under medium hardness (<18.75ºClark). Therefore, it is extremely suitable for vat dyes in cotton spinning products dyeing process.
Under normal dyeing conditions, the dosage of chelating dispersant RG-SPN is 1-4 g/L, which should be added before alkali agent.
3. Dyed cotton with reactive dyes
Hard water can cause calcium carbonate precipitation when dyeing cotton with reactive or direct dyes.
4. Dyeing cotton with direct dyes
The strong dispersing performance of chelating dispersant RG-SPN can effectively diffuse the calcium carbonate formed in dyeing and prevent the dyeing bath from turbidity.
The complexation of the chelating dispersant RG-SPN can also prevent the hydrolyzed reactive dyes from forming calcium salts that are not easy to wash away. However, unlike EDTA and NTA, the chelating dispersant RG-SPN does not break the coordinating metal complex bonds in the dyes and therefore has no negative effect on the hue and color fastness of reactive and direct dyes.
If in addition to calcium ions, there are more magnesium ions in the dyeing bath, or if it is difficult to dye turquoise blue and other difficult tones, it is recommended to add 0.5 g/L of RG-KW.
Under normal dyeing conditions, the dosage of chelating dispersant RG-SPN is 1-4 g/L, which is added in the initial stage of dyeing.
5. De-floating soaping for reactive dyeing/printing
The chelating dispersant RG-SPN is very suitable for post-soap washing after dyeing and printing with reactive dyes because of its excellent diffusion properties, so that the floating color washed out on the fabric can be dispersed in the soap bath, and will not be redeposited on the surface of the fabric, thereby It can effectively improve the color fastness of fabrics to washing and friction.
In general soap bath, the dosage of chelating dispersant RG-SPN is 1-2 g/L. If the floating color is difficult to remove, secondary soaping can be used. Times are: 1 g / liter.
The specific process should be adjusted as appropriate according to the test.
Packaging and storage:
50kg/125kg plastic drum or according to customer requirements.
Protect from exposure to sunlight and freeze, store at room temperature. At 5-25 ºC temperature, sealed storage, shelf life up to 12 months.
Once the packaging drum is opened, the product should be used up as soon as possible, and the packaging should be tightly closed after use.
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