Evonik Corp. (Parsippany, NJ, US) discussed with CAMX 2014 visitors its latest product, Vestanat PP, a polyurethane matrix system based on aliphatic diisocyanates for PU prepregs. The latent resin system is mixed and combined with the fabric reinforcement to form the prepreg, but doesn’t react until processing temperature is reached. At that point, the isocyanates become reactive. Notably, the product is said to be stable at room temperature and requires no refrigeration. Further, its cure profile is reportedly tailorable to any process. Sub-two-minute cycle times are possible in compression molding processes, says the company.
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