Epoxy-Rubber Coatings with Nano-Heterogenic Structure

An integral indicator (n) of structure optimization is determined as follows [3-5] [Pg.197]

In connection with this special interest present phenolic Mannich bases (PMBs) due to two types of reactive groups, such as phenolic hydroxyl and amine, connected with intermolecular hydrogen bonds. Depending on their amino groups, PMBs can be used as hardeners for cold and hot curing. [Pg.198]

The advantages of PMBs over traditional amines are as follows [Pg.198]

The influence of the chemical structure of substances in PMB molecules in the curing process of epoxy materials was investigated. Stress-strain properties were determined by traditional physical-mechanical methods. Glass transition temperature was estimated by the thermomechanical method. Chemical resistance of the epoxy based coating cured by PMBs was determined by change of their impact strength after exposition in an aggressive environment within 42 days. [Pg.198]

It was established that the reactive ability of PMBs decreases in a row of substitutes—methyl, ethyl, amine, and piperidine groups at an atom of tertiary nitrogen decreases. [Pg.198]

Big Chemical Encyclopedia