Preventing waste water pollution in adhesives industry - esp. for chipboard prodn., by setting neutral pH and adding reactivity stabilisers (CS 29.6.79)

摘要

In preventing strong waste pollution, adhesive industry waste water is set to pH 7-8.5, using as bonding agent, 0.5-500 mg NH4OH or NaOH/1. cycle water. The reactivity conditions of the adhesives are stabilised by adding 50-500 mg/l opt. lyophobic polymerised acrylic acid derivs., Al-, Fe(II)-, Fe(III)- or Ba salt hydrolysates, activated silicic acids, starches or natural bentonite type clays. Process is used partic. in the mfr. of wood chipboard and agglomerated boards contg. opt. modified animoplast and/or phenoplast adhesives. At neutral pH, hydrolytic and condensn. reactions are negligible.