In the agro-aqueous formulation (SC/EW) high-polymer dispersant spectrum, the "comb-like graft copolymer topology" and "strong hydrophobic backbone / anionic carboxyl density ratio" jointly dictate steric hindrance thickness in high-load SC, viscosity stability under hard-water/heat-storage, and wetting-stripping power on hard-to-disperse AIs like imidacloprid, pymetrozine, and cyantraniliprole. Conventional naphthalene sulfonate formaldehyde condensates (NNO, MF) are cheap but lack comb structure—insufficient steric hindrance causes viscosity surge and caking after heat-storage in high-load SC (>40%); lignosulfonates disperse weakly and foam heavily. As pesticide formulations shift to high-load SC/EW, hard-to-dissolve AIs proliferate, and demands for "vis-drop stability + anti-evaporation film + biodegradable non-accumulating" grow, sourcing a pale-yellow transparent polycarboxylate comb dispersant with >33% active, pH 5.5-6.5, anionic-nonionic, 1-6% internal addition has become the core gap for domestic agro-polymer dispersant localization. Addressing this "SC/EW vis-drop" pain point, Anhui IOTA Silicone Oil Co., Ltd. (IOTA) officially launches Dispersant IOTA 317 (general-purpose polycarboxylate dispersant for aqueous SC/EW, comb-structure high-polymer). Characterized by "pale-yellow transparent liquid, >33% active, anionic-nonionic, pH 5.5-6.5, water-soluble, 1-6% internal addition, 25kg/200kg PE/iron sealed drum, room-temp cool dry ventilated 1-year shelf," and backed by "comb polycarboxylate steric + strong hydrophobic anchor + anionic carboxyl electrostatic," it serves as the "comb-dispersant anchor" for imidacloprid/pymetrozine/cyantraniliprole high-difficulty AIs in SC/EW. Molecular Architecture: Comb Graft + Strong-Hydrophobic Anchor + Anionic-Nonionic Dual-Repulsion 3D Logic The core competitiveness of IOTA 317 stems from its "strong hydrophobic long-chain backbone (e.g., polyolefin/polyacrylate) grafted with hydrophilic anionic carboxyl (–COO⁻) side-chains forming a comb-like structure" high-polymer dispersing architecture:

• Comb Steric Hindrance: Hydrophobic backbone anchors on AI particles/oil droplets; hydrophilic carboxyl side-chains extend outward like "comb teeth," forming a 5-10nm hydrated layer that generates strong steric hindrance, blocking van der Waals agglomeration; vs. linear dispersants, comb structure doubles or triples hindrance thickness—post-heat-storage viscosity stays stable, no caking.
• Strong Anchor + Anion Electrostatic: Hydrophobic backbone strongly affinitizes to low-polarity AIs (imidacloprid/cyantraniliprole); carboxyl partially ionizes (–COO⁻) at pH 5.5-6.5, forming electrostatic repulsion with positive AI surface—"dual-repulsion stacking" multiplies dispersion efficiency.
• Film-Form Anti-Evap + Penetration Boost: Dispersant dries on leaf into an ultra-thin hydrophilic film, suppressing transpiration, extending active residence for systemic uptake (e.g., imidacloprid); naturally degrades in soil, non-accumulating in plants.

Performance Leap: From "Naphthalene Series Caking" to "Comb Stable-Suspension" Incorporating IOTA 317 enables qualitative leaps:

• High-Load SC Vis-Drop: 3-5% in 50% imidacloprid SC—D90 drops from 8μm to <2μm, initial viscosity <300mPa·s, post-54℃×14d viscosity <800mPa·s (naphthalene series typically >3000), water separation <3%, excellent flow.
• Hard-AI Breakthrough: For pymetrozine (extremely low water solubility) and cyantraniliprole (high-melt hydrophobic), 4-6% achieves D90<3μm stable suspension, 2-year ambient no settling/caking.
• EW Stability: 2-4% in pendimethalin/acetochlor EW—uniform oil droplets (D50<1μm), no creaming/no oil-float, good 0℃ recovery.
• Hard-Water + Eco: Stable at 500ppm hard water, no flocculation; naturally degrades in soil/water, low bee/fish toxicity, fits green formulation trend.

Application Penetration: From Imidacloprid SC to Pendimethalin EW IOTA 317 covers sectors triply sensitive to "high-load + hard-to-disperse AI + heat-stable":

• SC: Imidacloprid, thiamethoxam, pymetrozine, cyantraniliprole, tebuconazole, difenoconazole high-load SC.
• EW: Pendimethalin, acetochlor, lambda-cyhalothrin, abamectin EW.
• SE (Suspension-Emulsion): SC+EW combo, e.g., herbicide+insecticide.
• Seed Coating: Imidacloprid/thiamethoxam seed treatments—disperses, films, and protects.

IOTA Technical Guide: Internal 1-6%, Avoid Heat/Cold

• Addition: Internal add 1-6% (adjust per AI difficulty and load); add to water phase with wetter/antifreeze before sand-milling or homogenizing.
• Synergy: Works well with lignosulfonates, naphthalene sulfonates, EO/PO block polyethers; pH 5.5-6.5 optimum—adjust with citric acid/NaOH if formula drifts.
• Temp Note: Polymer viscosity highly temp-dependent—higher temp = lower viscosity; no high-heat sun-exposure (>40℃) or freezing (<0℃), or viscosity irreversibly changes/layering occurs.
• Taboo Red Line: Avoid direct bulk mixing with strong cationic flocculants (charge neutralization → floc); store room-temp cool dry ventilated, sealed.
• Storage: 25kg/200kg PE or iron drum sealed; room-temp cool dry ventilated; shelf 1 year, retest appearance/pH/active/dispersibility after expiry, extend if qualified.

Industry experts note that under mandatory agro-formulation waterization, high-load SC becoming mainstream, and hard-to-disperse AIs (imidacloprid/cyantraniliprole class) rising, comb polycarboxylate dispersants are upgrading from "Solvay/Clariant import followers" to "SC/EW vis-drop stable-suspension reference dispersants." IOTA 317, with its ">33% active + comb polycarboxylate + anionic-nonionic dual-repulsion + 1-6% internal-add instant" hard metrics, fills the domestic supply chain gap for high-polymer dispersants in high-difficulty SC/EW fields like imidacloprid/cyantraniliprole, providing a mass-producible path to replace imported Solvay Geropon, Clariant Dispersogen for downstream formulators. This confirms domestic agro-dispersants are advancing steadily along "naphthalene series → lignosulfonate → comb polycarboxylate," with growing technical say in high-load aqueous agro-formulation key materials.