Phenol-furane resin FF-65S
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Represents a product of condensation of phenol, formaldehyde, urea and furfuryl spirit.
Are applied as binding for want of manufacturing of rods from cold - harden of oeqw`mn-pitch mixes(mixtures) to moulds from pig-iron and steel. Is shared with acid hardeners, for example by orthophosphoric acid, benzen sulfonic acid or paratoluene sulphonic acid.