1. random polymeric surfactant
Such surfactants are formed by a three-dimensional net-like structure having a polymeric surfactant made of poly (alkylene) glycols, polyhydric alcohols with aliphatic or aromatic polycarboxylic acids and anhydrides polymerization. E.g. Atlox49.4 (HLB = 6), which is provided by a number of hydrophilic function ester or ether groups. When it is used in combination with AB-type or ABA type copolymer a high HLB value, obtained O / W emulsion stability is good.

   2. Regulation polymeric surfactant
Such means ABA embedded off Copolymer surfactant, typically in the form of EO-PO-EO copolymer off inlay, commonly used for pesticide emulsifier and dispersing agents. In use in water-based formulations, there are still some deficiencies, often largely detached from the suction surface and the EO unit is dependent on the solubility of the ionic strength and temperature of the medium; PO Another drawback is the low in hydrocarbons solubility, especially in fatty hydrocarbons, but by selecting different A and B is adjusted to give good performance embedded off copolymers. For example Atlox4912, it is made of poly (12-hydroxystearic acid and poly (alkylene) glycol esterified to obtain a copolymer ABA embedded off. This surfactant is ideally suited as a pesticide emulsifier, when it When a high HLB value of the emulsifier used in combination can be very good and stable O / W emulsion. This emulsion lipophilic chain plays adsorption, into the oil phase inside, while the hydrophilic high molecular weight polyethylene glycol to provide water phase stability, was determined lipophilic chain into the oil as compared to conventional C18 sorbitan esters to several times, namely adsorption ability.

3. comb type graft polymerization surfactant
Such surfactants have a very high molecular weight, the average molecular weight between 20,000 to 30,000. It long lipophilic group as the main chain skeleton, guaranteed not to fall off and metastasis strongly adsorbed on the particle surface; backbone with hydrophilic groups attached to the same chain as the teeth extend into the surrounding aqueous phase, to ensure unique steric hindrance effect. In Atlox4913 comb-shaped graft copolymer as an example, it copolymer of methacrylic acid / methacrylic acid ester constituting the main chain skeleton, plays a role in adsorption, and a suitable length of the polyoxyethylene chains as the lipophilic moiety extends The aqueous phase around a barrier that steric hindrance around the particle. Such polymeric surfactant adsorption capacity than conventional surfactants 10 times, it was hard to fall off and transferred from the surface of the particles, used as a pesticide dispersant improved thermal storage stability of the formulation, it can also be used in the preparation of high concentrations of pesticides The aqueous suspension.