| 摘要 |
<p>Process for producing binders suitable for the adhesive bonding of wood, according to which urea is condensed with a precondensate of urea and formalin or with a solution of formalin and with a formo- phenolic precondensate, melamine being added before, with or after the formo-phenolic precondensate. Application to the manufacture of adhesives containing little free phenol and formalin.</p> |
