High Temperature Vinyl Ester Resin (>150°C HDT)
Key Features
- HDT >150°C for high-temperature chemical service
- Retains chemical resistance at 60-80°C service temperatures
- Multifunctional backbone for high cross-link density
- Staged post-cure protocol for stress-free thermal performance
- Suitable for vessels per ASTM C582 at elevated temperature
High Temperature Vinyl Ester Resin is a multifunctional vinyl ester based on epoxy novolac or specially modified diglycidyl ether chemistry providing heat deflection temperatures exceeding 150°C after full post-cure. The high cross-link density achieved by the multifunctional backbone produces a resin system that maintains structural integrity and chemical resistance at service temperatures that standard BPA vinyl esters cannot accommodate.
This resin is post-cured at 120-160°C (staged cure protocol) to achieve its full thermal performance. After post-cure, HDT is 150-175°C, compressive modulus is well-maintained, and chemical resistance to concentrated acids at 60-80°C is retained. The resin is the preferred choice for FRP process equipment in high-temperature chemical environments, including distillation column linings, heat exchanger housings, reactor vessel construction, and steam-exposed structures.
Viscosity at 25°C is 400-700 mPa·s, suitable for hand lay-up and spray-up of relatively small vessel sections. Cure is by MEKP/cobalt ambient followed by mandatory elevated temperature post-cure. Compatible with all glass fiber sizing systems and woven fabrics for corrosion-resistant construction.
Specifications
| Parameter | Value |
|---|---|
| Appearance | Amber to yellow liquid |
| Styrene Content | 35-45% |
| Viscosity (25°C) | 400-700 mPa·s |
| Post-Cure Protocol | Staged: 80°C/2h → 120°C/2h → 150°C/2h |
| Gel Time (25°C, 1.5% MEKP) | 15-25 min |
| HDT (staged post-cure 160°C) | 150-175°C |
| Flexural Strength (cured, post-cured) | 120-160 MPa |
Applications
FAQ
Jumping directly to 150°C before adequate conversion is achieved at lower temperatures causes rapid exotherm and thermal stress in the laminate, leading to microcracking and reduced mechanical properties. The staged cure allows the resin to reach sufficient conversion at each temperature step before the next thermal jump, managing exotherm and minimizing residual stress. Each step should be held for minimum 2 hours. The laminate must be at ≥Barcol 30 before starting the post-cure ramp.
Direct Contact
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