Every breakthrough and progress
It is our continuous pursuit of technological innovation
Every breakthrough and progress
It is our continuous pursuit of technological innovation
As the global wind power industry moves toward larger turbines and higher towers, concrete-steel hybrid tower technology has become a mainstream solution due to its economy and stability. The bonding between precast concrete tower segments places strict demands on epoxy curing agents—requiring not only high strength and toughness but also adaptability to field construction under varied climatic conditions.
Highfar, in collaboration with Wanhua Chemical, has developed HF-B13 modified amine epoxy curing agent specifically for CNBM Zhongyan Technology Co., Ltd., for application in wind turbine segmented tower bonding, providing a reliable adhesive solution for onshore wind hybrid tower construction.
In hybrid tower construction, splicing adhesive is a critical structural bonding material. For a long time, this field was constrained by foreign technology monopolies, particularly the reliance on imported materials for low-temperature construction. Zhongyan Technology, a high-tech enterprise under China National Building Material Group, has deep technical expertise in wind power splicing adhesives, with its products already applied in large-scale projects by leading companies such as Goldwind, Envision Energy, and Mingyang Smart Energy.
Wanhua Chemical, a leader in China's new chemical materials sector, offers a complete product line of specialty amine curing agent raw materials. Its WANAMINE® series of cycloaliphatic amines and polyetheramines are widely used in composite applications such as wind turbine blade infusion and filament-wound cylinders.
Leveraging its technical expertise in modified amine epoxy curing agents, Highfar collaborated with Wanhua Chemical to develop the HF-B13 specialized curing agent tailored to the specific requirements of Zhongyan Technology's wind power splicing adhesives, achieving localized supply of a critical raw material.
Light Color for Good Adaptability
HF-B13 is a light to light-yellow transparent liquid. Its clean appearance does not affect the final color of the splicing adhesive, meeting the aesthetic requirements of wind turbine towers.
Fast Curing for Improved Construction Efficiency
When mixed with bisphenol A epoxy resin (EEW 180-190) at a 3:1 ratio (resin:curing agent), HF-B13 has a gel time of only 4-6 minutes (10g mixed mass) at 25°C. The fast curing speed effectively improves construction efficiency during tower lifting and splicing, reducing on-site waiting time.
Excellent Mechanical Properties
The cured product achieves a Shore D hardness of 80, delivering high strength and excellent mechanical performance that meets the load-bearing requirements of wind turbine tower bonding layers. After full curing, the bond interface can withstand complex stresses including wind loads and fatigue during tower service life.
High Hardness for Reliability
The high hardness ensures dimensional stability of the spliced joint during long-term service, avoiding the risk of tower deformation due to creep in the adhesive layer.
HF-B13 appears as a light to light-yellow liquid with a viscosity of 400 to 500 mPa·s at 25°C. When used with bisphenol A epoxy resin (EEW 190), the recommended mixing ratio is 3:1 (resin:curing agent). At 25°C, the gel time for a 10g mixed mass is 4 to 6 minutes. The cured product achieves a Shore D hardness of 80.
HF-B13 is primarily used for bonding precast segments of onshore wind concrete-steel hybrid towers. During on-site tower assembly, upper and lower concrete tower segments are bonded and fixed with epoxy splicing adhesive. As the key curing agent component of the splicing adhesive, HF-B13 ensures that the bond layer delivers comprehensive performance including rapid positioning, high strength, and high reliability.
HF-B13 is also suitable for:
Steel bonding adhesives and carbon fiber adhesives for building reinforcement
Crack injection adhesives and splicing adhesives
Structural adhesives, potting, and bonding applications
Winter construction and low-temperature epoxy systems
HF-B13 represents a collaborative innovation between Highfar, Wanhua Chemical, and Zhongyan Technology, demonstrating the industry trend of upstream and downstream cooperation to achieve localized production of critical materials. As the wind power industry continues to grow, HF-B13 will provide reliable bonding technology support for onshore wind hybrid tower construction.
For samples or technical support, please contact the Highfar team.
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