In the waterborne coating/ink silicone surfactant spectrum, the "acetylenic-modified polysiloxane Gemini architecture" and "100% active zero-solvent" jointly dictate substrate wetting critical depth, dynamic surface tension suppression, and foam-free/anti-foam process tolerance in waterborne PU, acrylic, and epoxy systems. Conventional silicone wetters (e.g., polyether-modified silicones) depress tension but lag dynamically, entrapping bubbles in high-speed roll-coating/spraying; acetylenic diol non-silicone surfactants are foam-free but floor at 26-28mN/m—insufficient for hard-to-wet substrates (PP/PE film, glass, metal). As waterborne industrial paints, printing inks, and synthetic leather release-paper demand "foam-free + super wetting (<23mN/m) + anti-crater + flow promotion + 0.1-1.0% micro-dose instant," sourcing an "acetylenic-modified silicone Gemini surfactant" with pale-yellow transparent, nD 1.440-1.450, viscosity 20-60cp, surface tension (0.1%) <23mN/m, 24-month shelf has become the core gap for domestic waterborne foam-free wetter localization.
Addressing this "foam-free strong-wet" pain point,
Anhui IOTA Silicone Oil Co., Ltd. (IOTA) officially launches
Foam-Free Defoaming Wetting Agent IOTA 4100 (acetylenic-modified silicone Gemini surfactant, specially modified polysiloxane copolymer). Characterized by "pale-yellow transparent liquid, 100% active, nD 1.440-1.450 (25℃), viscosity 20-60cp, surface tension (0.1%) <23mN/m, recommended 0.1-1.0%, 25kg PE/200kg iron drum, sealed room-temp 24 months," and backed by "acetylenic-silicone Gemini synergy + 100% zero-VOC + foam-free super-wetting," it serves as the "foam-free wetting anchor" for waterborne PU/acrylic/epoxy coatings, printing inks, and synthetic leather release-paper wetting.
Molecular Architecture: Acetylenic-Silicone Gemini + 100% Zero-VOC + Foam-Free Strong-Wet 3D Logic
The core competitiveness of IOTA 4100 stems from its "Gemini-type copolymer formed by bridging acetylenic groups (–C≡C–) with polysiloxane backbone":
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Acetylenic-Silicone Gemini Synergy: Acetylenic terminals give ultra-strong dynamic surface tension drop (0.1% <23mN/m) and inherent defoaming/anti-foam; Gemini structure (two hydrophilic heads + two siloxane tails) packs molecules tighter at air-liquid interface—wetting speed 2-3× faster than single-chain, instant spread without entrapping micro-bubbles in high-speed spray/roll.
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100% Active Zero-VOC: No solvent or water dilution—full active, no extra VOC, compliant with green coating rules; avoids dilution-evaporation surface defects.
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Foam-Free + Anti-Crater + Flow Triple: Acetylenic defoaming nature prevents micro-foam during wetting; polysiloxane backbone migrates to surface eliminating Benard cells and craters while promoting leveling—one agent replaces "wetter + defoamer + leveler" trio, simplifying formula and cutting cost.
Performance Leap: From "Wetting Traps Foam" to "Foam-Free Super-Wet"
Incorporating IOTA 4100 enables qualitative leaps:
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Waterborne Industrial Primer Wetting: 0.2-0.5% in waterborne PU/acrylic—contact angle on galvanized/Al/PP drops from 45° to <10°, first-coat coverage >95%, no craters, no orange-peel.
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High-Speed Roll/Spray Foam-Free: 0.1-0.3% in gravure/flexo ink—200m/min roll-coating zero micro-foam, print pinhole-free, dots sharp; spray atomization bubbles -80%+.
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Synthetic Leather Release-Paper Wetting: 0.2-0.6% in waterborne PU release-coating—paper grain fully replicated, no edge-shrink, stable release force, more reuse cycles.
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Waterborne Epoxy Floor: 0.3-0.8% in waterborne epoxy—good wetting on damp concrete, no rising bubbles, no craters, mirror finish post-cure.
Application Penetration: From Industrial Paint to Release Paper
IOTA 4100 covers sectors triply sensitive to "foam-free + super-wetting + anti-crater":
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Waterborne Coatings: PU, acrylic, epoxy industrial paints, wood coatings, floor paints.
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Printing Inks: Waterborne gravure/flexo, paper/film print wetting and anti-crater.
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Synthetic Leather: Waterborne PU release-paper coating, wet-process substrate finish.
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Special Processes: High-speed roll-coating, electrostatic spray, hard-to-wet substrates (glass/metal/PP) pre-treatment.
IOTA Technical Guide: Micro-Dose Instant, Any-Stage Add
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Add Timing: Add at any production stage (pre-mix, post-mill, let-down all OK), 0.1-1.0% (recommend start 0.2-0.5%); low-speed stir 5-10min for uniform.
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High-Speed Process: Add and stir before spray/roll—no extra defoamer needed; if system contains strong foaming thickeners, pair with trace mineral-oil defoamer (<0.05%) as backup.
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Taboo Red Line: Non-haz but moisture-seal (acetylenic terminals may hydrolyze inactive in humid conditions); avoid strong oxidizers (acetylenic oxidizable); recommended pH 4-10 (extreme pH may hydrolyze siloxane).
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Storage: 25kg PE / 200kg iron drum; sealed room temp, shelf 24 months; general chemical, non-food.
Industry experts note that under waterborne coating solvent-free push, printing high-speed adoption, and hard-to-wet substrates (EV battery casings, PP parts) coating demand explosion, acetylenic-modified silicone Gemini wetters are upgrading from "Evonik/Tego import followers" to "foam-free super-wetting reference auxiliaries." IOTA 4100, with its "100% active + <23mN/m + acetylenic Gemini + 0.1-1.0% micro-dose instant" hard metrics,
fills the domestic supply chain gap for foam-free defoaming wetting agents in waterborne PU/acrylic/epoxy fields, providing a mass-producible path to replace imported Evonik Surfynol series, Tego Glide/245 for downstream coating, ink, and synthetic leather enterprises. This confirms domestic waterborne wetting auxiliaries are advancing steadily along "polyether silicone → acetylenic diol → acetylenic-silicone Gemini type," with growing technical say in waterborne foam-free super-wetting key materials.
