Docusate sodium-70
Chemical name:Maleic acid diisooctyl ester sulfonate
CAS:1639-66-3
Molecular formula:C20H37NaO7S
Molecular weight:444
Performance and use
1. This product is an anionic surfactant with the characteristics of fast penetration, uniformity, wettability, emulsification and foaming. It is not resistant to strong acids, strong alkalis, heavy metal salts and reducing agents.
2. It is soluble in hydrophilic solvents such as water and lower alcohols; it is also soluble in benzene, carbon tetrachloride, kerosene, petroleum series solvents, etc. The aqueous solution is milky white, and the pH value of 1% aqueous solution is 5.0-7.0.
3. This product penetrates quickly and evenly. The best effect is achieved when the temperature is below 40℃ and the pH value is between 5-10. Once the silk fabric is treated with the penetrant, its penetration performance will not be affected by changes in temperature, acidity and alkali. It is mainly used for fabric penetration, printing and dyeing, pesticide emulsification, leather making, mineral processing, etc.
Quality Technical Indicators
Item | Index |
Exterior | Colorless to yellow viscous liquid |
Solid content,% | 70±2 |
pH value(1% aqueous solution) | 5.0-7.0 |
Osmotic force(1% aqueous solution)/s | ≤5.0 |
Usage method
1. Dyeing of raw cotton: For example, a 2 g/L solution of sodium docusate-70 is heated from room temperature to 95°C, treated for 20 minutes for dehydration, cooled, rolled, bleached, cleaned, and dechlorinated. After cleaning and dehydration, it is treated with sodium docusate once in the above method and can be used for dyeing.
2. Scouring and bleaching of raw cotton products: During scouring and bleaching, the raw cotton products can be treated with this product solution at 20°C for 5 minutes, and then other agents are added, and the temperature is gradually raised to 80~90°C within 20~30 minutes. Continue to treat for 45 minutes. At this time, if the cotton shell has been removed, it can be dyed. The dosage of sodium docusate is generally 2~3 g/L.
3. Scouring, bleaching and dyeing of raw cotton products. This method requires the selection of direct or reactive dyes that can resist oxidants. The dyeing preparation only needs to add dyes in the scouring and bleaching of method 2, and the process operation method is the same.
4. Scouring of viscose products: Viscose products generally have low temperature strength and are not resistant to strong scouring. Adding this product to the scouring bath can shorten the time by 2 hours, thereby reducing the damage to the fiber strength.
5. Use of asbestos products: To produce foam asbestos, add water and asbestos to the pulping pool and then add this product, then fully stir and mix into a paste, then add it to the mold and heat and bake it in the drying room. The dosage of this product is 10-15% of the asbestos; the production of dust-free asbestos thread is the same as the production of foam asbestos. After pulping, add it to the drawing mold and spray it into strips. After the color fixer Y solution is treated to solidify it into asbestos strips with a certain tensile strength, it is processed into thread and cloth after drying. The dosage of this product is 15-20% of the asbestos.
6. Use in the leather industry: Soaking treatment of dry board leather. Generally, this product is mixed with JFC in equal proportions. Soak or strengthen certain mechanical action at 25-36℃ for treatment, the dosage is generally 0.5-1.0%; when used as leather filling, it can be mixed with filling resin impregnation agent to reduce the surface tension of resin emulsion and increase permeability. The general dosage is about 10% of filling resin.
7. Use in pesticide industry can improve the penetration ability of pesticides on leaves.
Packaging and storage
Plastic barrel packaging,50Kg per barrel or packaged according to user requirements; stored and transported as general chemicals, stored in a dry and ventilated place; shelf life is ten months.
Precautions
1. This product has the best penetration effect below 40℃, and it is easy to hydrolyze when encountering alkali at high temperature, so it is advisable to treat the fabric with this product below 40℃ and then heat it. For the production of asbestos products, it has no effect on the product if the asbestos is beaten into pulp below 40℃ and then heated to about 200-300℃ for baking.
2. Not resistant to strong alkali, do not add directly to concentrated alkali solution, dilute the alkali solution before adding.
3. Anionic surfactants cannot be used in the same bath with cationic surfactants and cationic dyes.
4. When slurry is smelted and bleached, it is best to drain the slurry first to ensure the penetration effect.
5. If too much foam is found during use, a small amount of defoaming agent such as octanol and tributyl phosphate can be added to defoam.