Evonik solutions for this application at a glance: 

  • Adhesion promotion 
  • Improves heat resistance 
  • Reduces the use of organic material

 To liquefy metal, it must be heated to high temperatures. Between 660 and 1,600 degrees Celsius are needed to make metals liquid enough to pour into a mold. This also means the molds must withstand these high temperatures. For this reason, quartz sand is commonly used in mold production. Resins are used to bond the individual sand grains. To enable the inorganic sand to form a stable bond with the organic resins, silanes are added as adhesion promoters.

The less resin needed in the molds, the better. At high temperatures, the organic material burns off, producing smoke. A lower resin content in the quartz sand has a positive effect on smoke generation and worker safety. DYNASYLAN® enhances the adhesion of the resin to the quartz sand, allowing less resin to be used overall.

Dynasylan®