PROCESSO PARA A PREPARACAO DE AGENTES LIGANTES A BASE DE RESINAS FENOLICAS DE ENDURECIMENTO PELO CALOR

摘要

The novel binder is based on a heat-curing phenolic resin and a curing agent component and is characterised in that the phenolic resin is a phenolresol having a phenolic compound: formaldehyde molar ratio of 1:1-2 and the curing agent is a mixture of hexamethylenetetramine and an acidic, latent curing agent.