Epoxy resin systems improve processing flexibility of composites

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  • Larger structural components present different challenges than small parts
  • Optimized glass transition temperature for faster curing
  • Cross-linkable preform binder avoids fiber displacement during resin infusion

More and more manufacturers consider carbon fiber-based components for new vehicles. Hexion Inc. is supporting this trend with a range of epoxy resin systems designed to make mass production of of small and large structural components faster and easier. The company introduced two new resin systems at the recent #JECEurope2015.

Optimized glass transition temperature for faster curing

The new Epikote TRAC 06170 epoxy resin/Epikure TRAC 06170 curing agent system extends the company’s current line of high thermal-latency, low viscosity products for Resin Transfer Molding (RTM) and Liquid Compression Molding (LCM) processing. By optimizing the glass transition temperature (TG) of the new system, Hexion has been able to speed curing and enhance part stiffening at the end of the curing cycle while maintaining an extended resin injection window. Large, complex structural composites can be processed quickly, without cooling jigs or complicated part grippers.

Larger structural components present different challenges than small parts

“Producing composite parts is not a one-size-fits-all process” says Francis Defoor, Global Market Segment Leader Transportation, Hexion. The new TRAC 06170 system is an example of Hexion working closely with supply chain partners based on their specific injection and molding equipment to fine-tune the processing capabilities of the RTM/LCM resin systems to shorten cycle time and improve demolding performance.

Cross-linkable preform binder avoids fiber displacement during resin infusion

This system is fully compatible with a new cross-linkable preform binder from Hexion, Epikote Trac 06270 epoxy resin, also developed to ensure reliable production of complex composites under demanding, fast processing conditions. This binder is applied during the layup of fabric reinforcement to fixate the fibers in the shape of the desired composite part and to avoid fiber displacement during resin infusion, even when high injection speeds or pressure methods are used.



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