The hardener polietilenpoliamin (in abbreviated form - PEPA) represents liquid from light yellow till dark - brown color. PEPA is often used in paint and varnish industry, as raw materials by production of hardeners of ED - 16 and ED - 20 epoxies, and also in production of ion - exchange pitch and additives. Application of a polietilenpoliamin in pure form for hardening of pitch and a compound is not recommended because of a number of essential shortcomings, toxicity of PEPA, its exothermicity and very low heat resistance of the received compositions are basic of which. Undoubtedly, the hardener of PEPA is not replaceable in paint and varnish industry. It is used practically by all large enterprises involved in chemical branch. However, during the work with PEPA it is necessary to follow safety regulations as substance is toxic and can cause burns in case of its hit on integuments of the person.
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PEPA hardener