Detergent additives are key components in detergent formulations, mainly used to soften water quality, enhance decontamination power, disperse dirt and prevent redeposition. They enhance the cleaning efficiency of surfactants by chelating calcium and magnesium ions (hard water ions) in water, and are widely used in fields such as laundry powder, dishwashing liquid, and industrial cleaning agents.
Soften water quality: Chelate or precipitate Ca²⁺ and Mg²⁺ ions in water to prevent the formation of soap scum.
Enhanced decontamination: Synergistic surfactants (such as LAS, AES) improve decontamination effect.
Disperse dirt: Prevent dirt from readhering to the surface of clothes or utensils.
Buffer pH value: Maintain the alkaline environment of the washing system (pH 9-11) to enhance the ability to remove grease.
Parameters
|
Type |
Representative Compounds |
Key Characteristics |
|
Phosphates |
Sodium Tripolyphosphate (STPP) |
Strong chelation ability, low cost, but causes eutrophication (being phased out) |
|
Zeolites |
Zeolite A (4A) |
Phosphorus-free, eco-friendly, softens water via ion exchange, but weaker dispersion |
|
Organic Carboxylates |
Sodium Citrate, EDTA |
Good biodegradability, suitable for eco-formulations, but higher cost |
|
Polymers |
Polyacrylate Sodium (PAAS) |
Excellent anti-redeposition, commonly used in liquid detergents |
|
Layered Silicates |
Sodium Silicate (Water Glass) |
Provides alkalinity and anti-corrosion, mainly for industrial cleaners |
Typical Applications
Characteristics and advantages
Outstanding foam stability creates dense and long-lasting foam, enhancing the user experience
The excellent thickening effect significantly increases the viscosity of the product and improves its texture
Good emulsifying ability stabilizes the oil-water system and prevents stratification
Strong compatibility and compatibility with anionic/cationic/nonionic surfactants
High cost performance and low addition amount (1-5% can show effect), reducing the formula cost
Outstanding Advantages
Household detergents: laundry powder, laundry liquid, dishwashing liquid (such as STPP or zeolite for laundry powder, sodium citrate for eco-friendly dishwashing liquid).
Industrial cleaning agents: Metal cleaning, food equipment descaling (commonly used silicate and polymer additives).
Personal care products: Used as a chelating agent in some shampoos (such as EDTA).