Description:
Infusion/RTM pre-accelerated modified vinyl ester resin
Performance Attributes:
Low shrinkage, high strength, impact resistance and water resistance.
Excellent surface profile.
Excellent blister resistance
Application:
Marines or boat construction (shells and decks) and large FRP products.
Designed as high premium skin-coat resin for high performance boats.
REL 6600 is a high-performance vinyl ester resin specifically designed for vacuum infusion in the manufacture of wind turbine blades. This product is designed to meet the stringent requirements of large wind turbine blades for production efficiency, structural reliability, and long-term durability, and is particularly suitable for extreme corrosive environments such as offshore wind power.
Through optimized formulation, it focuses on improving the fatigue performance of composite laminates while maintaining good infusion processability, making it a highly efficient and reliable alternative or complement to traditional epoxy resin systems.
| Product Name | Description | Performance Attributes | Application |
| REL 6600 vinyl ester resin | Infusion/RTM pre-accelerated modified vinyl ester resin | Low shrinkage, high strength, impact resistance and water resistance Excellent surface profile. Excellent blister resistance | Marines or boat construction(shells and decks) and large FRP products Designed as high premium skin-coat resin for high performance boats. |
TYPICAL LIQUID RESIN PROPERITIES
| Property at 25ºC | Value | Method |
| Brookfield Viscosity (25ºC) | ||
| -LVT sp#2/30 rpm | 180 -220 mPa.s | GB/T7193.4.1 |
| Acid Value | 4-8 mg KOH/g sample | GB/T2895 |
| Non-Volatile Content | 52-56% | GB/T7193.4.3 |
| Gel time (2.0% MEKP) | 30 -120min (Be customized) | GB/T7193.4.6 |
| Peak Exotherm | 100-140 ºC | GB/T7193.4.6 |
TYPICAL CURING CHARACTERISTICS
| Property of casting | Value | Method |
| Tensile Strength | 85.5 MPa | ISO 527 |
| Tensile Modulus | 3.3 GPa | ISO 527 |
| Elongation | 5.1% | ISO 527 |
| Flexural Strength | 140 MPa | ISO 178 |
| Flexural Modulus | 3.4 GPa | ISO 178 |
| Heat Distortion Temperature (1.81MPa) | 95 MPa | ISO 75 |
| Glass transition temperature, Tg | 115 ºC | DSC 10ºC/min |



Changzhou RealLand Composite Material Technology Co., Ltd.
Choosing REL 6600 vinyl ester resin means significant efficiency improvements and overall cost optimization for your wind turbine blade manufacturing.
Significantly Increased Production Efficiency and Shorter Delivery Cycles: Compared to traditional epoxy resins, REL 6600-based vinyl ester resin systems can effectively shorten production cycles by approximately 30%. It typically has a faster curing speed and reduces reliance on heated molds and post-baking, thereby helping you increase production line capacity and respond to market demands more quickly.
Excellent processability and good mechanical balance: REL 6600 vinyl ester resin is optimized for vacuum infusion processes, exhibiting excellent fiber wettability and leveling properties. It excels in achieving high tensile strength and high elongation at break, providing blades with the necessary structural toughness and impact resistance to cope with extreme wind loads.
Future-proof environmental and weather-resistant solutions: This vinyl ester resin is available in low-styrene or styrene-free formulations, which not only improve the workshop working environment but also help your products meet increasingly stringent global environmental regulations (such as EU REACH requirements). Its cured products possess excellent resistance to hydrolysis, salt spray, and UV aging, which is key to ensuring the 25-year design life of offshore wind turbine blades.





Q: Can I Request a Sample of Unsaturated Polyester Resin?
A: Yes, we can provide 10kg of resin as a free sample, but freight are typically the responsibility of the buyer.
Q: Do you have OEM/ODM service?
A: Yes, we are highly flexible in offering OEM/ODM services.
Q: Can I Customize the Formulation of Unsaturated Polyester Resin for My Project?
A: Yes, absolutely. We understand that different projects may have unique requirements. Our R & D department is well-equipped to handle custom formulations based on your specific needs. You can provide us with the details of your project, including any specific characteristics or performance criteria you are looking for, and our experts will work on tailoring a formulation that meets your requirements.
Q: What is The Product Lead Time?
A: 10 days.
Q: What's Shelf Life of Unsaturated Polyester Resin?
A: Normally 8 months.
Q: How Do I Choose the Right Unsaturated Polyester Resin for My Application?
A: We would provide guidance on selecting the appropriate UPR based on different project requirements.
Q: What Certifications and Quality Standards Does Your Unsaturated Polyester Resin Meet?
A: Our Unsaturated Polyester Resin meets CCS, RoHS, REACH, EMS, and QMS certifications and quality standards.

RealLand is a integrated enterprise, provides specialty chemical products, services and solutions for many of world’s most essential industries.
E-mail: castle@reallandcomposite.com
Mobile: 0086-13775214842
WhatsApp: +86-13775214842
Add: 2305-2306, Changfa Plaza Office Building, No. 101-1, The Taihu Lake East Road, Xinbei, Changzhou, Jiangsu, China