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Resina de poliéster insaturada isoftálica
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Resina de poliéster insaturada isoftálica
Isophthalic Unsaturated Polyester Resin (commonly abbreviated as isophthalic UPR) is a high-performance thermosetting resin widely used in the production of Plásticos reforçados com fibra de vidro (FRP). Known for its excellent chemical resistance, enhanced mechanical properties, e superior thermal stability, it represents a significant upgrade from general-purpose o-phthalic resins. This document provides a comprehensive overview of isophthalic resin, including its propriedades, formulários, processing techniques, and a detailed Ficha Técnica (TDS).
Introdução ao desempenho do produto
Isophthalic Unsaturated Polyester Resin (commonly abbreviated as isophthalic UPR) is a high-performance thermosetting resin widely used in the production of Plásticos reforçados com fibra de vidro (FRP). Known for its excellent chemical resistance, enhanced mechanical properties, e superior thermal stability, it represents a significant upgrade from general-purpose o-phthalic resins. This document provides a comprehensive overview of isophthalic resin, including its propriedades, formulários, processing techniques, and a detailed Ficha Técnica (TDS).
2. What is Isophthalic Unsaturated Polyester Resin?
Isophthalic resin is a type of resina de poliéster insaturada synthesized by the condensation polymerization de isophthalic acid (IPA) or its anhydride, with glicóis such as propylene glycol or diethylene glycol, and anidrido maleico. The unsaturated double bonds in the molecular chain make it curable by free radical polymerization, typically through initiators such as MEKP (methyl ethyl ketone peroxide).
This resin features a linear structure with pendant vinyl groups, making it compatible with cross-linking agents like styrene monomer. Compared with o-phthalic resin, isophthalic UPR offers higher resistance to chemicals, increased durability, e greater tensile strength.
3. Principais características e vantagens
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✅ Superior Chemical Resistance
Suitable for applications involving acids, alkalis, and moderate solvents. -
✅ High Mechanical Strength
Enhanced flexural, tensile, and impact strength make it ideal for load-bearing FRP components. -
✅ Excellent Thermal Stability
Capable of withstanding higher service temperatures (up to 120°C depending on formulation). -
✅ Improved Weatherability
Withstands UV exposure, water ingress, and thermal cycling better than standard resins. -
✅ Good Adhesion to Reinforcements
Works well with glass fiber, carbon fiber, and other synthetic reinforcements. -
✅ Longer Service Life
Durable in demanding environments such as marine, industrial, and outdoor applications.
4. Aplicações comuns
Thanks to its enhanced performance profile, isophthalic UPR is used in many demanding structural and corrosion-resistant FRP products:
✔️ Industrial and Chemical Equipment
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Tanks
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Scrubbers
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Pipes
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Ducts
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Fume hoods
✔️ Marítimo e Offshore
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Boat hulls
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Decks
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Painéis marítimos
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Jet ski and kayak components
✔️ Construção
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Gratings
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Perfis pultrudados
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Tampas de bueiro
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Rebar and wall panels
✔️ Transporte
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Automotive body parts
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Truck panels
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RV exteriors
✔️ Consumer and Utility Products
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Bathtubs and sinks
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Shower trays
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Chemical-resistant countertops
5. Processing Methods
Isophthalic resins are suitable for a wide range of processing techniques:
| Method | Adequação |
|---|---|
| Hand lay-up | Excelente |
| Pulverizar | Excelente |
| Filament winding | Excelente |
| Pultrusão | Very good |
| Moldagem por compressão | Bom |
| Resin transfer molding | Acceptable with modified resin |
Agentes de cura:
Typically cured with MEKP ou BPO (benzoyl peroxide) in combination with aceleradores de cobalto e promoters.
Tempo de gel:
Adjustable depending on formulation and catalyst system, typically 8–30 minutes at ambient temperature.
6. Ficha Técnica (FT)
Below is a sample TDS for Resina de poliéster insaturada isoftálica. Actual values may vary slightly depending on formulation and manufacturer.
📌 Propriedades Gerais
| Propriedade | Valor típico | Método de teste |
|---|---|---|
| Aparência | Clear to pale yellow liquid | Visual |
| Viscosidade a 25°C (mPa·s) | 400 – 650 | Brookfield LV, #3/60rpm |
| Índice de Acidez (mg KOH/g) | 15 – 25 | ISO 2114 |
| Conteúdo sólido (%) | 60 – 70 | ISO 3251 |
| Monomer Content (Styrene %) | 30 – 40 | GC Method |
| Gel Time @ 25°C (3 phr MEKP) | 12 – 18 minutes | ISO 2535 |
| Prazo de validade | 6 meses a ≤ 25°C | — |
🔧 Mechanical Properties (Cured Resin)
| Propriedade | Valor típico | Método de teste |
|---|---|---|
| Resistência à tração (MPa) | 60 – 80 | ISO 527 |
| Módulo de tração (GPa) | 3.0 – 3.5 | ISO 527 |
| Alongamento na ruptura (%) | 2.0 – 3.5 | ISO 527 |
| Resistência à flexão (MPa) | 100 – 120 | ISO 178 |
| Módulo de flexão (GPa) | 3.5 – 4.2 | ISO 178 |
| Resistência ao impacto Izod (kJ/m²) | 6 – 10 | ISO 180 |
| Dureza Barcol | 35 – 45 | ASTM D2583 |
🌡️ Resistência térmica e química
| Propriedade | Valor típico | Método de teste |
|---|---|---|
| Heat Deflection Temp (HDT °C) | 80 – 120 | ISO 75 |
| Water Absorption (%) | < 0.3 | ISO 62 |
| Condutividade térmica (W/m·K) | ~0.2 | ISO 22007 |
| Flammability | Self-extinguishing (with filler) | UL94 |
| Resistência química | Excellent to acids & saltwater | In-house test |
7. Storage and Handling
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Armazenar em original, sealed containers in a cool, dry, and shaded area.
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Avoid direct sunlight and keep away from open flames or ignition sources.
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Use proper PPE including gloves, goggles, and a respirator if necessary.
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Ensure good ventilation during use.
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Observe standard fire safety procedures—unsaturated polyester resins are flammable.
8. Safety Information
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Consulte o Ficha de Dados de Segurança de Materiais (MSDS) before handling.
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Vapors may cause respiratory irritation—use in well-ventilated areas.
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Avoid contact with skin and eyes.
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Usar explosion-proof equipment in storage and mixing areas.
9. Opções de embalagem
Isophthalic UPR is commonly available in the following packaging formats:
| Packaging Type | Peso |
|---|---|
| Metal Drums | 220–240 kg |
| IBC Totes | 1000 kg |
| Bulk ISO Tank | ≥ 20,000 kg |
10. Conclusion
Isophthalic Unsaturated Polyester Resin offers a perfect balance between performance and cost for a wide range of composite applications. Its enhanced strength, chemical durability, e resistance to weathering and thermal degradation make it the ideal choice for customers seeking more than just a general-purpose resin.
Whether you’re building chemical tanks, marine decks, corrosion-resistant ductwork, or high-strength FRP panels, isophthalic UPR delivers long-term performance, reliability, and value.
Resina de poliéster insaturada isoftálica
Series :
Produtos proxy >aplicativo
revestimentos, adesivos e compósitos
Nome do Produto :
resina o-ftálica
Perguntas frequentes
P:
What are the main applications of o-Phthalic Unsaturated Polyester Resin?
A :
o-Phthalic UPR is widely used in general-purpose fiberglass-reinforced plastic (FRP) applications such as gratings, tanks, bathtubs, pipes, panels, and decorative components. It is especially suited for environments requiring moderate mechanical strength and cost-efficiency, but not intended for aggressive chemical or high-temperature conditions.
P:
How does it compare to isophthalic and vinyl ester resins?
A :
Cost: o-Phthalic is more economical. Performance: It has lower chemical and thermal resistance compared to isophthalic or vinyl ester resins. Usage: Choose o-Phthalic for general use, isophthalic for stronger corrosion/thermal needs, and vinyl ester for high-performance or corrosive environments.
P:
How do I store and handle o-Phthalic resin safely?
A :
Store in cool (5–25°C), dry, well-ventilated areas. Keep away from heat, ignition sources, and sunlight. Use sealed containers, ideally nitrogen-blanketed. Always wear protective gloves, goggles, and use fume extraction when handling. Follow your supplier's MSDS for detailed safety procedures.
P:
Can o-Phthalic resin be pigmented or filled?
A :
Yes. o-Phthalic resin is compatible with polyester-compatible pigments and fillers (e.g., calcium carbonate, ATH). Add pigments and fillers before mixing in the curing agents. Keep the viscosity in check if adding fillers to avoid poor wet-out of reinforcements.
P:
How long is the shelf life of o-Phthalic resin, and how can it be extended?
A :
Typical shelf life is 3 to 6 months when stored in ideal conditions (below 25°C in a sealed container). To extend shelf life: Ensure resin is stabilized with hydroquinone or MEHQ inhibitors. Store in dark, cool environments. Avoid frequent opening of containers to limit oxygen and moisture exposure.
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