phenolic resin composition, bicomponent binder system, use of a c-h-acid compound, process for producing a phenolic resin composition, process for producing a bicomponent binder system, process for producing a feeder mold and feeder mold

摘要

A phenolic resin composition for use in the polyurethane cold box and / or non-bake process is described. the phenolic resin composition comprises an ortho-condensed phenolic resole having etherified and / or free methylol groups in a total amount of 40 to 60% by weight based on the total mass of the phenolic resin composition; free formaldehyde in an amount less than 0.1% by weight based on the total weight of the phenolic resin composition; one or more formaldehyde reaction products with one or more c-h-acid reactant compounds; other constituents in a total amount of at least 38 wt.%, the amount of water in the phenolic resin composition is not greater than 1.0 wt.% in each case based on the total mass of the phenolic resin composition. Also described is a bicomponent binder system for use in the cold-box and / or non-bake polyurethane process, a use of a ch-acid compound as a formaldehyde sequester to produce a phenolic resin composition for use in the cold-box process. and / or polyurethane no-bake, a process for producing a phenolic resin composition, a process for producing a two-component binder system, and a process for producing a feed mold, a casting mold or a casting core from a mixture of molding material and finally corresponding feeder mold, casting mold and casting core.