A METHOD FOR REDUCING THE FORMALDEHYDE CONTENT OF A RESINOUS STARTING MATERIAL

摘要

The present invention relates to a method for reducing the formaldehyde content of a resinous starting material, wherein the method comprises the steps of: a) providing a phenolic formaldehyde resin as starting material having a formaldehyde content in the range of from 0.01 wt.% to 25 wt.%., and b) subjecting said phenolic formaldehyde resin as starting material to a contact process in the presence of a heterogeneous catalyst such that the formaldehyde of the resinous material thus treated is lower than the formaldehyde content of the resinous starting material, preferably in the range of from 5 wt.% to 0 method for reducing the formaldehyde content of a resinous starting material.Awt.%.