As an innovative foundry supplier, Hüttenes-Albertus soon started to develop cold box binder systems with improved properties. In 1999, the first generation of cold box systems with solvents containing silicate was used in foundries. Compared to the aliphatic and aromatic solvents used until then in the cold box process, the use of tetraethyl orthosilicate was the first step towards a cold box system of an inorganic nature.

The tried and tested systems based on REM or TES, or with reduced monomers, are still the productive standard today appreciated by many foundries.

Continuous improvement

Hüttenes-Albertus is not content with resting on the laurels of success, but understands research and development as a continuous process. 

One of the most recent development goals was to gradually increase the proportion of inorganic constituents in the cold box system. To this end, a new generation of binders on the basis of tetraethyl silicate was developed. In the new generation (Si-modified system), the Si units are not only contained in the solvent but also integrated in the resin molecule.

HA’s new patented solution combines, for the first time, the advantages of both the cold box process and the inorganic method. It is now possible to use significantly less solvent than with the former cold box binders.

The results are promising:

  • Compared to the aromatic cold box systems, the carbon content was reduced by 23%. Through the consistent integration of silicate components, this new generation of binders has already reached the remarkable level of content of silicon dioxide of 12.4%.
  • The new generation of cold box binders contributes to further improvement in terms of environmental compatibility and minimization of pollution.
  • Significant progress has also been made as regards the reduction of condensate production and gas pressure.

This new generation of binders is already successfully being used for serial production by a number of aluminium and iron foundries.