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Phenolic-Epoxy Adhesives in The 21st Century

SpecialChem / Andy Extance – Dec 1, 2010

Protected phenolics are helping tackle the shelf-life problem plaguing this otherwise highly useful product type. Phenolic-epoxy adhesives have been known for over 50 years and were one of the first commercial high temperature adhesives. However, despite their age, until recently these products have still faced a major problem due to their short shelf-lives. Now, researchers have discovered how to resolve this issue, without sacrificing the adhesives' performance advantages or creating toxicity issues as some previous attempts have. This problem is part of the same characteristic that is also considered a virtue of phenolic-epoxies, namely their low curing temperature requirements in comparison to other phenolic-based resins. Their reactivity at low temperatures limits long-term stability, meaning that they often need to be stored at temperatures as low as -18°C.

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