Neuere Entwicklungen bei Holzbindemitteln

The article surveys recent developments and current status of synthetic and natural adhesives in the industry of wood-based panels. The major topics covered are: -Developments of UF-resins of low molar ratio to meet exacting environmental demands, modification of UF-resins, current status of using catalyst systems in UF-adhesives, -the use of phenolic resins of low alkali content, modifications of PF-resins with other binders such as PMDI and binder components such as urea and resorcin, -the increasing importance of natural adhesives as a sole binder or as a binder component in synthetic adhesive systems. Special attention has been given to tannins, lignins and carbohydrates, -the recent use of inorganic binders such as cement, gypsum and combinations thereof.