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Cosmetic & Personal Care Polymer Factory

Cosmetic & Personal Care Polymer Manufacturers

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Product Overview

Zhongli's Cosmetic and Personal Care Polymer series — the W-series linear SEPS and SEP hydrogenated block copolymers — are precision-engineered rheology modifiers and oil-phase structuring agents developed specifically for anhydrous and oil-rich cosmetic formulations. As the personal care industry accelerates its shift toward silicone-free, clean-label, and sustainably sourced ingredients, W-series polymers offer formulators a technically robust hydrocarbon-based alternative that delivers comparable sensory performance to silicone elastomers and traditional waxes without the regulatory and consumer perception challenges associated with those materials.

Produced via controlled anionic polymerization and selective hydrogenation at Zhongli's dedicated facility in Zhejiang, China, each W-series grade offers a defined viscosity profile, narrow molecular weight distribution, and verified compatibility with mineral oils, white oils, isoparaffins, and cosmetic ester oils. At use concentrations of 1–8%, these polymers transform low-viscosity carrier oils into smooth, stable gels, creams, and stick structures — enabling product developers in lipstick, sunscreen, hair care, and intimate care categories to achieve their target textures with minimal formulation complexity and reliable thermal stability from manufacturing to consumer use.

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The development of Zhongli Technology's product series has gone through stages such as (1) universal grade SBS and SEBS, (2) special specification SEBS and universal grade SEPS, and (3) special specification SEP (S).

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Technical Specification Sheet

Parameter Detail
Polymer TypeLinear Hydrogenated Styrene-Isoprene Block Copolymer (SEP / SEPS)
INCI NameHydrogenated Styrene/Isoprene Copolymer
Available GradesW-100 (standard MW), W-200 (high MW), W-300 (SEP diblock, low viscosity)
Styrene Content12–22% (grade-dependent)
Viscosity (5% in 100N mineral oil, 25°C)W-100: 2,000–5,000 cPs; W-200: 8,000–15,000 cPs; W-300: 500–2,000 cPs
Cloud Point<−20°C (W-100, W-200); <−30°C (W-300)
Thermal Stability Range−20°C to +60°C (formulated gel stability)
Oil CompatibilityMineral oil, white oil (pharma grade), isoparaffin, paraffin wax, cosmetic esters
Typical Use Level1–8% in oil phase (application-dependent)
AppearanceWhite to off-white pellet; odorless
Regulatory StatusNot listed on EU Annex II/III prohibited/restricted lists; suitable for EU CPSR documentation
Available FormsPellet (standard); pre-dissolved solution in white mineral oil (15–25% concentration)
Packaging1 kg, 5 kg (R&D); 20 kg, 25 kg bags (production); odor-neutral sealed packaging

* INCI confirmation letter provided with every order. EU Cosmetics Regulation 1223/2009 reference documentation and safety data available to support your CPSR. Custom MW grades available on request.

Key Features

  • Silicone-Free Structuring for Clean Beauty Formulations: W-series polymers deliver the smooth, cushiony gel texture and controlled slip that consumers associate with silicone-based products — without dimethicone, cyclomethicone, or any siloxane chemistry — enabling on-trend "silicone-free" label claims that are increasingly mandatory in premium skincare and haircare retail channels.
  • Precise, Predictable Rheology Across Three Viscosity Tiers: The W-100 / W-200 / W-300 grade ladder gives formulators a calibrated toolkit — from light serums (W-300 at 1–2%) to firm lip balm sticks (W-200 at 5–7%) — all within the same polymer chemistry, simplifying supplier qualification and raw material management.
  • Exceptional Thermal Stability from Factory to Consumer: Formulated gels maintain structural integrity from −20°C to +60°C, preventing the syneresis, phase separation, or texture drift that commonly occurs in wax-thickened or clay-based systems when products are subjected to distribution temperature cycling.
  • Ready-to-Use Solution Grade Eliminates Dissolution Equipment: For labs and production facilities without high-shear, high-temperature dissolution capability, Zhongli offers W-series pre-dissolved in pharmaceutical-grade white mineral oil at 15–25% concentration — ready to add directly to the oil phase at room temperature, reducing formulation time and equipment investment.
  • Direct Manufacturer Supply with Full Regulatory Dossier: Sourced directly from the polymer producer — not a trading company — W-series customers receive the complete documentation chain (INCI confirmation, SDS, Certificate of Analysis, EU regulatory reference letter) needed for CPNP notification, MoCRA registration, and retailer ingredient transparency programs, with technical support available from Zhongli's application chemists.

Application

  • Lipstick & Lip Balm Structuring: W-series polymers replace traditional candelilla and carnauba waxes as structuring agents, offering superior oil binding, gloss, and smooth payoff without graininess. Compatible with pigment-heavy formulations.
  • Hair Styling Gels & Pomades: Provide the characteristic slip and hold in oil-based hair styling products; SEPS thickeners yield clear-to-translucent gels with excellent rub-out and zero flaking.
  • Sunscreen & SPF Formulations: Acts as a viscosity stabilizer in emollient-rich sunscreens, improving thermal stability of the formulation and preventing pigment sedimentation on storage.
  • Jelly & Gel Cream Textures: In combination with hydrocarbon oils or silicones, W-series polymers create the smooth, cushiony gel-cream texture sought after in premium skincare products.
  • Massage & Intimate Care Gels: High-MW W-200 dissolved in white mineral oil creates non-aqueous, hypoallergenic gels used in massage, personal lubricant, and intimate care products.
  • Antiperspirant & Deodorant Sticks: As a co-structurant in anhydrous stick formulations, W-series polymers contribute to smooth application, reduce drag, and improve thermal stability of the stick body.
  • Nail Care & Cuticle Treatments: Oil-soluble rheology modifier in cuticle oils and nail serums that provides the right viscosity and skin-adhesion without tackiness.

Advantage

  • Silicone-Free & Clean-Label Compatible: Fully hydrocarbon-based chemistry with no siloxane backbone — ideal for "silicone-free" labeled products that are trending in premium skincare and haircare markets globally.
  • Superior Oil Compatibility: Dissolves cleanly in mineral oil, white oil, isoparaffin, and many ester oils at low concentrations (1–5%), enabling cost-effective thickening without the need for high-shear mixing equipment.
  • Outstanding Thermal Stability: W-series gels maintain viscosity and structure from −20 °C to +60 °C, preventing product separation or texture change across distribution and retail temperature ranges.
  • Excellent Sensory Profile: Delivers a light, non-greasy skin feel with controlled slip — closely matching the sensory attributes consumers expect from premium cosmetic products without occlusive heaviness.
  • Formulation Flexibility: Compatible with a broad range of cosmetic actives, UV filters, emollients, and pigments with minimal interaction or compatibility issues, reducing development time.
  • Consistent Supply from Dedicated Manufacturer: Unlike distributor-sourced grades, Zhongli W-series is manufactured in-house with dedicated production lines, ensuring supply security and technical support directly from the polymer producer.

Payment & Shipping

  • Accepted Payment Terms: T/T 30% deposit with balance before shipment; L/C at sight for orders above USD 10,000. PayPal accepted for sample orders.
  • Minimum Order Quantity: 50 kg for cosmetic W-series grades (to accommodate small batch R&D); production MOQ 500 kg. Free 200 g formulation samples available to qualified cosmetic labs.
  • Lead Time: In-stock grades ship within 5–7 business days. Custom molecular weight or dissolved solution grades: 20–30 days.
  • Packaging: 20 kg or 25 kg sealed bags standard; 1 kg and 5 kg R&D packs available. Products are odor-neutral and packaged to prevent contamination.
  • Shipping: Worldwide delivery via sea freight (FCL/LCL from Ningbo) or air/courier for small quantities. Incoterms: FOB, CIF, DDP supported. Hazmat classification: Non-DG, no restrictions.
  • Documentation: COA, SDS, INCI name confirmation, purity certificate, and cosmetic compliance letter (EU Cosmetics Regulation 1223/2009 reference) provided on request.
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ABOUT ZHONGLITEC
Coming From China,
Marketing To The World.
Zhejiang Zhongli Synthetic Material Technology Co., Ltd. is China Cosmetic & Personal Care Polymer Manufacturers and Wholesale Cosmetic & Personal Care Polymer Factory,was established in May 2015, invested by Zhejiang Zhongcheng Packing Material Co.,Ltd.(Share No.:002522).While the annual production of 120,000 tons of thermoplastic elastomer materials project was launched in November 2015.
Zhejiang Zhongli Synthetic Material Technology Co., Ltd. ABOUT US Zhejiang Zhongli Synthetic Material Technology Co., Ltd.
Zhejiang Zhongli Synthetic Material Technology Co., Ltd.
Zhejiang Zhongli Synthetic Material Technology Co., Ltd.
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Cooperative Clients

  • Q: What is the INCI name for Zhongli's W-series polymers?
  • A: The INCI name for W-series linear SEPS triblock copolymers is "Hydrogenated Styrene/Isoprene Copolymer." For the SEP diblock grades (W-300), the INCI name is "Hydrogenated Styrene/Isoprene Copolymer" as well. We provide INCI confirmation in writing with each order to support your product labeling and CPNP/MoCRA submissions.
  • Q: Are W-series polymers approved under the EU Cosmetics Regulation?
  • A: W-series SEPS polymers are not listed on the EU prohibited substances list (Annex II) and are not restricted under the EU Cosmetics Regulation 1223/2009. They are used as functional polymer ingredients (rheology modifiers/film formers) and must be assessed as part of your product's Cosmetic Product Safety Report (CPSR). We supply the necessary supplier safety data to support your safety assessor.
  • Q: At what concentration should W-series be used as a cosmetic thickener?
  • A: Typical use levels range from 1% to 8% depending on the desired texture and the oil phase composition. W-200 (high MW) achieves gel-like textures at 3–5% in 100N mineral oil. W-100 is better suited for lighter textures at 2–4%. We recommend starting with 2% in your oil base and adjusting upward. Technical formulation guidance is available from our application lab.
  • Q: Is the W-series compatible with silicone oils?
  • A: W-series polymers have limited solubility in low-viscosity silicone fluids (e.g., cyclomethicone, dimethicone D5). However, in blended oil systems containing 30–50% mineral oil alongside silicones, compatibility can be achieved. We recommend conducting compatibility screening at your target oil ratio before scaling up. Our technical team can advise on co-solvent strategies.
  • Q: Can Zhongli supply W-series in dissolved form for easier handling?
  • A: Yes. For customers who prefer ready-to-use solutions, we offer W-series pre-dissolved in pharmaceutical-grade white mineral oil at 15–25% concentration. This eliminates the need for high-temperature dissolution equipment in your lab or production facility and reduces handling complexity. MOQ for solution grades is 200 kg.
Recommended LINS: Hydrogenated Block Copolymer