Jiahua Chemical - Application of Polycarboxylate Dispersants in Pesticide Formulations

Traditional dispersants have a certain effect on the dispersion and stability of pesticide particles in the dispersion medium, but they are easy to be desorbed from the surface of pesticide particles, which has certain limitations on stabilizing and dispersing pesticide particles. The polycarboxylate dispersant with jiahua chemistry stands out among many agricultural dispersants for its unique dispersion and disintegration performance, and becomes the most eye-catching agricultural dispersant. 

Introduction to dispersant:

Dispersant is a substance that can prevent flocculation between particles, disperse and stabilize particles. Dispersants are required in both water-based and solid pesticide formulations; Its use prevents the dispersed pesticide particles from flocculating, aggregating or coalescing again, and ensures that the product has a high suspension rate after being diluted with water, so as to improve the efficacy of pharmaceutical products. The traditional dispersant has a certain effect on the dispersion and stability of pesticide solid particles in the dispersion medium, but its adsorption capacity on the particle surface is not very strong, and it is easy to desorb from the pesticide particle surface. Therefore, when using the traditional dispersant, it has certain limitations on stabilizing and dispersing pesticide particles. Due to the special physical and chemical properties of new pesticides developed in recent years and people's pursuit of high content of preparations, dispersants such as lignosulfonate and naphthalene sulfonate formaldehyde condensate, which have been used for a long time, are difficult to meet the requirements of processing due to their large dosage or color.

In recent years, the application of water-soluble polymer dispersants in cosmetics, washing, pigments, oil fields, cement, ceramics, pesticides and other industries has been increasing at home and abroad; Among the water-soluble polymer dispersants with superior dispersion performance, polycarboxylate dispersants, no matter from the selected raw materials and production process, or from the performance and molecular structure, as well as the appearance color (white) and amount (less), are essentially different from the dispersants used earlier, and have many unique advantages. In recent years, polycarboxylate dispersants have been widely used in pesticide formulation products (especially suspension agents and water dispersible granules), playing a key role in obtaining stable and high-quality formulation products. 

Characteristics of polycarboxylate dispersant:

Compared with traditional dispersants, polycarboxylate dispersants have the following characteristics:

1. It has little influence on pH value and temperature of ions in suspension system.

2. It can significantly reduce the viscosity of the dispersion system, increase the content of solid in the preparation of pesticide active ingredient, and has good fluidity under high content of solid particles.

3. Polycarboxylate dispersants are easy to dissolve in water. In the dispersion system medium, they play a three-dimensional space protection, dispersion and stability role for pesticide active ingredients and other added ingredients, and are not easy to flocculation and sedimentation.

4. The obtained dosage form is white, which can meet the user's requirement of not carrying color.

5. Although the price is higher than that of ordinary dispersants, the amount used is less than that of ordinary dispersants; If polycarboxylate dispersant is used in combination with other dispersants, such as lignin sulfonate, alkyl naphthalene sulfonate formaldehyde condensate, polyphenyl ethyl phenol phosphate salt, it will not only be efficient, but also cost-effective.

Carboxylate dispersant AGC-401:

AGC-401 dispersant is a kind of acrylic acid and ester surfactant, which is liquid and soluble in water. It has good dispersion and low foaming power. It can be compatible with other anionic and non-ionic surfactants, mainly used in pesticide suspension agent. The modified carboxylic acid polymer copolymer is recommended for water-based preparations. It has anchoring effect and can prevent crystal growth. It can be mixed with 703D for use in SC dosage forms such as 10% imidacloprid, 25% imidazolidinyl ester, etc.