Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Chang Chun ETERSET 2505 Unsaturated Polyester Resin

ChangChun ETERSET 2505 is a high-performance unsaturated polyester resin from ChangChun’s ETERSET series, engineered for superior mechanical strength, chemical resistance, and fast gel time. Widely used in FRP laminating, casting, and pultrusion, it offers excellent flow, low shrinkage, and reliable compatibility with MEKP initiators and styrene monomers.
  • chang chun eterset 2505 unsaturated polyester resin_cf238618
  • chang chun eterset 2505 unsaturated polyester resin_cf238618

Features Of Chang Chun ETERSET 2505 Unsaturated Polyester Resin

  1. Excellent mechanical strength and dimensional stability after curing.

  2. Good compatibility with standard styrene monomers and common accelerators.

  3. Low viscosity for enhanced fiber wet-out and improved processability in hand lay-up and spray-up operations.

  4. Consistent reactivity profile ensuring reliable gel time control under ambient and elevated temperatures.

  5. Superior weather resistance and UV stability when formulated with appropriate additives.

Typical Applications Of Chang Chun ETERSET 2505 Unsaturated Polyester Resin

  1. Fiberglass-reinforced plastic (FRP) tanks and vessels for chemical storage.

  2. Marine components including boat hulls, decks, and structural panels.

  3. Industrial corrosion-resistant ducting and fume hoods.

  4. Automotive body panels and under-hood components requiring thermal and chemical resilience.

  5. Building & construction elements such as roofing sheets, cladding, and grating.

Specifications Of Chang Chun ETERSET 2505 Unsaturated Polyester Resin

Chemical TypeUnsaturated polyester resin (ortho-phthalic type)
Product FormLiquid
AppearanceClear to pale yellow viscous liquid
Viscosity (25°C, mPa·s)350–550
Reactive DiluentStyrene (35–40 wt%)
Gel Time (25°C, 1.5% MEKP + 0.2% cobalt naphthenate)12–18 minutes
Solid Content (wt%)60–65
Acid Value (mg KOH/g)16–22


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