Urethane systems often require catalysis that provides extended open time due to processing requirements, but a rapid end-cure is still desired for efficient production. The current state of the art for latent catalysis in polyurethanes includes a wide variety of possibilities. Most notable of these types of catalysts are the salts of mercury and nickel. These particular metals have been scrutinized in the past due to their well-known impact on the environment and human health. What will be presented here is a recent development which is a less environmentally impactful alternative catalyst for the polyurethane reaction that provides extensive open time with rapid end-cure.
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