Low Viscosity Vinyl Ester for Infusion
Key Features
- Low viscosity (150-300 mPa·s) for complete preform infusion
- Vinyl ester chemical resistance retained in infused laminates
- High flexural strength (280-360 MPa) at 50% Vf
- Extended pot life for large structure infusion
- HDT 100-120°C after post-cure for elevated temperature service
Low Viscosity Vinyl Ester for Infusion is a bisphenol A-based vinyl ester resin optimized with reduced molecular weight and adjusted styrene content to achieve a viscosity of 150-300 mPa·s at 25°C, suitable for vacuum-assisted resin infusion (VARI) and RTM closed-mold processes where the chemical resistance and mechanical performance of vinyl ester is required but the resin must flow rapidly through thick fiber stacks.
The resin delivers extended pot life (45-90 minutes at 20°C with standard MEKP) and sharp gel transitions for clean mold fill and fast demold. Cured infused laminates at 50-55% fiber volume achieve flexural strength of 280-360 MPa, far exceeding equivalent UPR infusion grades. The outstanding chemical resistance of the vinyl ester backbone is fully retained in infused laminates, making this the preferred infusion resin for chemical plant FRP panels, offshore structures, and high-performance marine vessels.
Compatible with all standard glass and carbon fiber infusion media. The lower viscosity is achieved by molecular weight control and optimized styrene content (38-45%), without the need for reactive diluents that could compromise chemical resistance. Post-cure at 80°C/2h is recommended for maximum laminate properties.
Specifications
| Parameter | Value |
|---|---|
| Appearance | Clear to pale yellow liquid |
| Density (25°C) | 1.03-1.07 g/cm³ |
| Styrene Content | 38-45% |
| Viscosity (25°C) | 150-300 mPa·s |
| HDT (post-cured 80°C/2h) | 100-120°C |
| Flexural Strength (50% Vf) | 280-360 MPa |
| Pot Life (20°C, 1.0% MEKP) | 45-90 min |
Applications
FAQ
The primary advantage is chemical resistance: cured vinyl ester infused laminates resist concentrated acids, alkalis, and solvents that would degrade UPR laminates within months. Secondary advantages: higher tensile elongation (3-5% vs. 1-2% for UPR), better fatigue resistance, and higher HDT (100-120°C post-cured vs. 80-90°C for isophthalic UPR). The price premium over UPR is typically 40-80%, justified for chemical service or high-performance applications.
Direct Contact
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