| http://www.w3.org/ns/prov#value | - An important feature of the one-component systems according to the invention is that aromatic diamines, such as for example 4,4 -diaminodiphenylmethane, 2,4-or 2,6-diaminotoluene, 3,5-diethyl-2,4-:-2,6-(65:35)-diaminotoluene, 1,5-diaminonaphthalene or 3,5-diethyl-3',5'-diisopropyl-4,4'-diaminodiphenylmethane, may also be used as chain-extending agents (C) in these systems without losing the charac
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