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Huntsman will be presenting new data on physical-properties and part-assembly for urethane composites, plus processing guidelines for the pultrusion industry at the forthcoming World Pultrusion Conference.
This paper, which is a follow-up on a presentation given by a Huntsman speaker at Composites 2005 last September, features all new data from testing conducted within the past six months comparing the performance of pultruded urethanes against alternative resins like unsaturated polyesters (UPE), vinyl esters (VE), and hybrid polymers – using the same profiles and with identical reinforcements.
“We believe the best approach to helping pultruders succeed with two-part urethane resins is to demystify their processing and handling parameters versus more traditional resins,” says David Bareis, sales manager for Polyurethane Composites at Huntsman. “Once these differences are understood, processors can begin producing higher performing composites in moderately complex profiles that take advantage of the many benefits urethanes offer. As processors gain more experience and comfort, we expect to see even higher levels of performance in very-complex profiles, which should provide opportunities for new applications and market segments for pultruded composites. We hope our presentation at the World Pultrusion Conference will encourage other pultruders to consider switching to urethane systems.”
Over the past five years, several new resin systems and processing methods have been commercialized in the pultrusion industry to meet processor demands for higher performing polymers capable of overcoming the mechanical and processing limitations of traditional resins such as UPE and VE.
Hybrid urethane-polyester and two-component urethane resins have been developed in an effort to help pultruders expand their markets and differentiate their products.
The material handling and processing requirements for polyurethane materials are different from, and to date, less well understood than those of traditional resins, a factor that has slowed polyurethane use in commercial applications.
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