USE OF CLOSED-PORE MICROSPHERES OF EXPANDED PEARLITE AS A FILLER FOR THE PRODUCTION OF MOULDINGS FOR THE FOUNDRY INDUSTRY
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Jan 23, 2025
app pub date -
Jul 26, 2024
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Jul 26, 2024
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The present invention relates to the use of closed-pore microspheres of expanded perlite as a filler for producing moldings for the foundry industry, to a composition for producing moldings for the foundry industry, comprising closed-pore microspheres of expanded perlite as a filler, and a binder, the binder being selected from the group consisting of water glass, phenol-formaldehyde resins, two-component systems comprising as reactants a polyisocyanate and a polyol component containing free hydroxyl groups (OH groups), and starch, and also to moldings for the foundry industry and to a process for producing a molding for the foundry industry.
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