Pymetrozine is a heterocyclic active ingredient with four nitrogen-atoms and one oxygen atom in the structure. It is easy to make the formation of hydrates by forming hydrogen bonds or water clusters. During the grinding process, water can be reversibly absorbed, and make the formulation viscosity increase or even caking. So as to the product shows poor performance on pourability and dispersion. It is generally not easy to obtain a stable suspension products.

Dispersant SP-SC50

• CAS No: 62601-60-9

• Chemical name: Polycarboxylate

• Packing: In 200kg Drum

• Qty in 20′ FCL: 16MT

• Origin: China

Specification

Item	Standards
Appearance (25°C)	yellow viscous liquid
pH (1% aqueous solution, 25°C)	6.0 ~ 8.0
Moisture (%)	≤5.0
Solid content (%)	≥20.0
Kinematic viscosity (mm²/s, 40℃)	3500～12000
Specific gravity (25°C)	1.01～1.15

Description

Copolymerized by unsaturated monomers, SP-SC50 is a new type of polymeric surfactant with comb structure. SP-SC50 is featured by excellent dispersing and viscosity reducing ability. The product is an ideal agent for environment friendly formulations like SC, FS, SE, CS, EW and DF. In addition, the product and products with similar structure can also be applied to organic or inorganic pigment dispersions like water based coatings and water based inks.

Applications

Has strong universality for most SC formulations when combined use with SP-SC3E, especially suitable for imidacloprid, thiamethoxam.

Using SP-SC50 alone is suitable for the preparation of (wettable powder) pymetrozine insecticide.

Example

Formulation name	Benefits
500g/L Triazolone SC	Good stability, no crystal precipitation under thermal storage conditions.
30% Cyromazine SC	Solving the problem of the high water solubility of Cyromazine and the difficulty of processing the SC, the formulation is also stable and has a high suspension rate.
450g/L Linuron SC	Inhibition of creaming, good system stability.
450g/L Prochloraz EW	Good stability unfer RT and after thermal storage, with no crystal precipitation.

FAQ

Why does pymetrozine SC become thick and poor-flowing after bead grinding?

The root cause lies in the chemical structure of pymetrozine technical material. Rich nitrogen-containing groups on pymetrozine molecules tend to generate hydrogen bonds and form water clusters. In the wet-grinding process, water will be reversibly absorbed, which raises system viscosity significantly, resulting in bad pourability and poor dispersion performance. To solve this formulation bottleneck, you need high-performance comb polymeric dispersant such as SP-SC50. It adsorbs tightly on pymetrozine particle surfaces and builds steric repulsion to break hydrogen-bond assembly, keeping the pymetrozine insecticide SC at proper viscosity and good flow property.

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