On the INCI spectrum of PEG-n dimethicones,
PEG-10 dimethicone sits at the mid-HLB silicone emulsifier window: n=3/5 leans W/O, n=8/10 spans W/Si (water-in-silicone) and W/O, n≥12 leans O/W. As anhydrous skincare (silicone-base creams), high-SPF physical sunscreens (ZnO/TiO₂ suspended in silicone phase), and foundations (W/Si for silky non-oily feel) tighten demands for
"cold-process emulsifiable, low-dose high-water uptake, silky non-greasy", a
colorless to pale-yellow translucent, 400-1600 cSt, PEG-10 grafted, faint polyether odor lipophilic silicone emulsifier emerges as the formulator's spare part welding "silicone skin-feel" and "aqueous stability" into one molecule.
Addressing this "PEG-10 lipophilic silicone emul" slot,
Anhui IOTA Silicone Oil Co., Ltd. (IOTA) releases
PEG-10 Dimethicone IOTA 99336. Defined by core parameters—
PDMS–(CH₂)₃–O–(CH₂CH₂O)₁₀H, lipophilic silicone tail anchors silicone phase / PEG head bites aqueous phase, low-temp self-emulsifying—it carries the triple attributes of
"W/Si + W/O dual ability + low-dose high-water + silky non-sticky," serving as the "silicone-main emulsifier anchor" for skincare creams, sunscreen emulsions, foundation liquids, and silicone cleansing oils.
Molecular Architecture: PDMS–(CH₂)₃–O–(EO)₁₀H Amphiphilic Logic
IOTA 99336 structures as CH₃–SiMe₂O–(SiMe₂O)ₙ–SiMe₂–(CH₂)₃–O–(CH₂CH₂O)₁₀H (mostly mono-PEGylated, minor bis):
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Lipophilic Silicone Tail Anchors Oil: PDMS segment miscible with cyclomethicone (D5/D6), dimethicone, alkyl polysiloxane—plants emulsifier in silicone continuous phase, building stable interfacial film for W/Si (water droplets in silicone) or W/O.
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PEG-10 Head Bites Water: 10 EO units enough hydrophilic yet not flipping to strong O/W, landing mid-HLB silicone emulsifier window; on water drop-in, polyether head probes water bead, silicone tail roots in silicone oil, dropping interfacial tension to self-emulsifiable (400-1600 cSt mother liquor quick-stir yields milk).
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Cold-Process Self-Emul: All-liquid raw allows 25℃ operation, no heating/homogenizer; polyether head hydrates fast, low freezing point, good fridge-recovery—fits anhydrous skincare "cold process".
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Silky Non-Greasy: Silicone chain gives typical "silicone slip", PEG segment not soap-film heavy, skin-feel fresh water-break, not fake-slip like pure polyether silicone.
Performance Leap: From Single W/O to W/Si High-Water
In skincare, sunscreen, and makeup contexts, 99336 pays off at once:
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Anhydrous Silicone Cream: Dimethicone (50-80%) oil phase, 99336 main emul 1-4%, water phase up to 40-60% still stable; paste silky, spreads water-break, no oil sheen.
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Physical Sunscreen: ZnO/TiO₂ dispersed in silicone phase, 99336 emulsifies to W/Si, aqueous phase with glycerin/electrolyte, UV film even, no pilling, water/sweat resistant.
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Foundation: W/Si carries pigments, 99336 low foam, moderate thixotropy, pump smooth, press-on adheres no patch.
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Cleansing/Massage Oil: W/O co-emul, turns W/Si on water contact, rinses no film.
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Low-Dose Co-Emul: 0.1-1.5% into fatty acid/sucrose ester system lifts silicone feel, stabilizes cold.
Application Penetration: From Face Cream to Sunscreen Pump
IOTA 99336 precisely lands on the interface needing
"silicone-base + high-water + cold-process":
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Skincare: Silicone face cream, night jelly, eye cream, primer.
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Sunscreen: Physical sunscreen, kids sunscreen, water-sweat outdoor SPF.
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Makeup: Foundation, BB/CC cream, concealer, lip-cheek base.
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Special Care: Scalp cleansing oil, body scrub milk, baby skincare.
Skincare formulators read 99336 plainly: it is the domestic isomorphic of
Dow XIAMETER MEM-1322/5225C, Evonik ABIL EM 90 (PEG-10 neighbor), Shin-Etsu KF-6011—PEG-10 graft, 400-1600 cSt, W/Si dual, silky non-greasy. The value is not new structure but folding "silicone-base high-water cold-process" into one bucket of pale-yellow translucent liquid, so skincare and sunscreen plants have a swap when import PEG-10 silicone emulsifier lead time wobbles.
