Isophthalic Polyester Resin
High-Performance Iso Resin with Superior Chemical & Heat Resistance
Premium isophthalic unsaturated polyester resin engineered for demanding applications requiring exceptional corrosion resistance, high-temperature performance, and long-term durability.
ISO Resin Full Form
ISO stands for Isophthalic. ISO resin is the abbreviated term for Isophthalic Unsaturated Polyester Resin, a high-performance composite resin offering superior chemical resistance and heat resistance compared to standard orthophthalic (ortho) resins.
What is Isophthalic Resin?
Isophthalic polyester resin (commonly known as iso resin) is an advanced type of unsaturated polyester resin manufactured using isophthalic acid as the primary dibasic acid component. This chemical modification results in a resin with significantly enhanced performance characteristics.
As a leading isophthalic unsaturated polyester resin manufacturer, Changyuan New Materials produces a comprehensive range of iso resins designed for applications where superior chemical resistance and elevated temperature performance are critical.
Our isophthalic resins are widely used in corrosion-resistant equipment, marine vessels, chemical storage tanks, and high-performance composite structures. For projects requiring stringent fire safety compliance, we also offer specialized
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Why Choose Isophthalic Resin?
Superior performance characteristics that make iso resin the preferred choice for demanding applications
Superior Chemical Resistance
Excellent resistance to acids, alkalis, and corrosive chemicals, making it ideal for harsh industrial environments.
High Heat Resistance
Outstanding heat deflection temperature (HDT ≥90-120°C), suitable for high-temperature applications.
Enhanced Mechanical Properties
Superior tensile and flexural strength compared to orthophthalic resins, ensuring long-lasting durability.
Excellent Water Resistance
Low water absorption and superior hydrolytic stability, perfect for marine and wet environments.
Weather Resistance
Outstanding UV resistance and weatherability, maintaining performance in outdoor applications.
Versatile Applications
Suitable for a wide range of applications from chemical tanks to marine vessels and pultrusion profiles.
Isophthalic Resin Applications
Our iso resins power critical applications across diverse industries
Our Isophthalic Resin Portfolio
Specialized formulations for every application requirement
Corrosion Resistant Series
Designed for chemical storage tanks, pipes, and industrial equipment exposed to harsh environments.
ZY199 Standard Iso
Viscosity: 450-650 cps | HDT: ≥120°C
ZY-Iso-Plus
Enhanced chemical resistance for higher temperatures
Marine & Food Grade
High-purity resins with superior water resistance and safety certifications.
ZY9518 Food Grade
FDA Compliant | Clear Appearance
ZY-Marine-Iso
Superior Hydrolytic Stability | Lloyd's Approved
Typical Properties (Cured Casting)
Performance data for our high-grade Isophthalic Polyester Resins
| Property | Test Method | Standard Iso Resin (ZY199) | Food Grade Iso (ZY9518) |
|---|---|---|---|
| Appearance | - | Clear / Pale Yellow | Clear |
| Viscosity (25°C) | Iso 2535 | 450 - 650 cps | 400 - 600 cps |
| Gel Time (25°C) | Iso 2535 | 10 - 20 min | 15 - 25 min |
| Heat Deflection Temp (HDT) | ASTM D648 | ≥ 120°C | ≥ 95°C |
| Tensile Strength | ASTM D638 | 75 MPa | 70 MPa |
| Flexural Strength | ASTM D790 | 125 MPa | 115 MPa |
| Barcol Hardness | ASTM D2583 | ≥ 40 | ≥ 38 |
| Water Absorption | Iso 62 | Low | Very Low |
* Note: Typical properties are based on cured castings and standard testing conditions. Specific grades may vary.
Why Source from a Specialized Manufacturer?
Consistent Quality Control for Critical Applications
Unlike general-purpose blenders, Changyuan New Materials operates dedicated 20-ton automated reactors specifically for isophthalic resin synthesis.
Our precise two-stage cooking process ensures:
- Consistent Molecular Weight: Critical for stable gel times and mechanical strength.
- High Purity: Automated filtration removes impurities that cause defects in thin laminates.
- Batch-to-Batch Stability: Digital monitoring of acid value and viscosity.
Isophthalic vs Orthophthalic Resin
Understanding the performance advantages of iso resin
| Property | Isophthalic Resin | Orthophthalic Resin |
|---|---|---|
| Chemical Resistance | Excellent | Good |
| Heat Deflection Temp (HDT) | 90-120°C | 60-80°C |
| Water Resistance | Superior | Good |
| Mechanical Properties | Higher Strength | Standard |
| Weather Resistance | Excellent | Good |
| Cost | Higher | Lower |
| Best For | Demanding Applications | General Purpose |
Frequently Asked Questions
Common questions about isophthalic polyester resin
What is the full form of ISO resin?
The full form of ISO resin is Isophthalic Unsaturated Polyester Resin. It is a high-performance composite resin made using isophthalic acid, offering superior chemical and heat resistance compared to standard orthophthalic resins.
What is Isophthalic Polyester Resin?
Isophthalic polyester resin (iso resin) is a type of unsaturated polyester resin made using isophthalic acid instead of orthophthalic acid. This modification provides superior chemical resistance, higher heat deflection temperature, and better mechanical properties compared to standard orthophthalic resins.
What are the advantages of Isophthalic Resin over Orthophthalic Resin?
Isophthalic resins offer several key advantages: 1) Superior chemical resistance to acids and alkalis, 2) Higher heat deflection temperature (typically 20-40°C higher), 3) Better water resistance and hydrolytic stability, 4) Enhanced mechanical properties, and 5) Improved weatherability. These make iso resins ideal for demanding applications where ortho resins may not perform adequately.
What applications are best suited for Isophthalic Resin?
Isophthalic resins excel in: chemical storage tanks and pipes, marine vessels and boat building, corrosion-resistant equipment, water treatment facilities, food-grade containers, high-temperature FRP products, pultrusion profiles, and premium gel coats. Any application requiring superior chemical resistance, heat resistance, or water resistance benefits from iso resins.
How does Isophthalic Resin perform in marine environments?
Isophthalic resins are excellent for marine applications due to their superior water resistance, low water absorption, and excellent hydrolytic stability. They resist osmotic blistering better than orthophthalic resins and maintain their mechanical properties even after prolonged exposure to seawater.
What is the typical HDT (Heat Deflection Temperature) of Isophthalic Resins?
Our isophthalic resins typically have HDT values ranging from 90°C to 120°C, significantly higher than standard orthophthalic resins (60-80°C). This makes them suitable for applications exposed to elevated temperatures or requiring dimensional stability at higher temperatures.
Can Isophthalic Resins be used for food-grade applications?
Yes, certain isophthalic resins in our portfolio (such as ZY9518) are specifically formulated for food-grade applications. These resins meet stringent safety requirements and are ideal for food-grade liners in winding pipes and tanks.
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