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Monday, 13 July 2020
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How do the components of anaerobic compositions interact?

Wednesday, 1 June 2011

What happens between the components of the anaerobic adhesive materials. Possible interactions for their production, storage, and curing are considered in the latest released study.

Having a summary of interactions of the components of anaerobic adhesives Source: Henkel KGaA

Having a summary of interactions of the components of anaerobic adhesives Source: Henkel KGaA

Anaerobic adhesives (AAs) are widely used in various branches of engineering for locking and sealing mechanical connections. They are complex compositions that contain a basis capable of polymerisation, initiating and stabilising the system and functional additives for regulation the physicochemical properties. Oligoesters(meth)acrylates, such as the triethylene glycol dimethacrylate, is usually used as a basis of AA, a system containing butyl hydroperoxide, o-benzosulfimide and N,N-dimethyl-p-toluidine to initiate curing. A.P. Sineokov and his colleauges at the Federal State Unitary Enterprise in Russia published their study in the Polymer Sicence Series D, Volume 4, pages 138-141. They show the important role of the donor- acceptor interactions of components of the initiating system and the metal surface of the substreate in the inititation of curing. Prior to the curing process in the spaces between the metal substrates. AAs should be stored in the presence of oxygen of the air for a long time without a significant loss of polymerisation activity. During storage, the components of AAs are exposed to various interactions with each other and dissolved oxyygen. For example hydroperoxyl radicals can be transformed into hydrogen peroxide with oxygen emission. More possible processes are considered in the publication based on literature and experimental data.

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