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Excellent mechanical strength and dimensional stability after curing.
Good chemical resistance to dilute acids, alkalis, and common solvents.
Low viscosity for easy handling, improved fiber wet-out, and efficient processing.
Consistent reactivity profile enabling reliable gel time control with standard MEKP initiators.
Formulated for high clarity and low color development in cast and laminated applications.
Fiberglass-reinforced plastic (FRP) tanks and vessels for corrosion-resistant storage.
Industrial flooring systems requiring chemical and abrasion resistance.
Marine components including decks, hulls, and structural panels.
Automotive under-hood and exterior composite parts.
Electrical insulation components such as busway covers and switchgear enclosures.
| Chemical Type | Unsaturated polyester resin (orthophthalic) |
| Product Form | Liquid |
| Appearance | Clear, pale yellow liquid |
| Viscosity (25°C) | 350–450 mPa·s |
| Reactive Diluent | Styrene (~38–42 wt%) |
| Gel Time (with 1.0% MEKP, 25°C) | Approx. 12–18 minutes |
| Solid Content | ~58–62 wt% |
| Density (25°C) | 1.09–1.12 g/cm³ |
Q1: What is the primary application profile for Aropol M105?
A: Aropol M105 is a general-purpose, medium-reactivity unsaturated polyester resin formulated for use in reinforced composites, particularly in filament winding, pultrusion, and sheet molding compound (SMC) processes where balanced mechanical properties, good flow characteristics, and consistent cure performance are required.
Q2: How does Aropol M105 compare to higher-viscosity or low-profile resins?
A: Unlike low-profile resins designed for surface finish control in thermoset composites, Aropol M105 offers standard viscosity and shrink behavior typical of conventional orthophthalic polyesters. It is not engineered for low-shrink or low-profile applications but delivers reliable processability and structural performance in standard composite manufacturing environments.
Q3: Which initiators and accelerators are typically compatible with Aropol M105?
A: Aropol M105 is compatible with standard organic peroxide initiators such as methyl ethyl ketone peroxide (MEKP), and can be accelerated with cobalt naphthenate or other metal-based promoters. Final catalyst selection should be validated based on processing conditions, ambient temperature, and desired gel time.
Q4: Is Aropol M105 suitable for outdoor or weather-exposed applications?
A: While Aropol M105 provides good baseline chemical resistance and mechanical retention, it is not inherently UV-stabilized. For long-term outdoor exposure, formulation with appropriate UV absorbers and HALS stabilizers—as well as protective topcoats—is recommended to maintain surface integrity and gloss retention.
Q5: Can Aropol M105 be used in food-contact or potable water applications?
A: Aropol M105 is not pre-qualified for direct food-contact or potable water applications. Its suitability for such uses depends on full regulatory evaluation—including final cured system testing—by the formulator or end-user in accordance with applicable local and regional requirements.
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E-mail: wangxingqiang@ericwchem.com
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