Alkaline phenol binders for casting sand - Kao Step®

Alkaline phenol binders harden the mold as a result of a chemical reaction between a highly alkaline phenol resin and organic ester.As a process capable of producing high quality castings, this process is the second most popular in labor intensive, high-mix, low-volume production, following furan self-hardening binders.

Features of Kao Step®

  • Because the binder does not contain sulfur (S), there are no sulfur-derived casting defects and odors during pouring can be reduced.
  • Due to the high collapsibility of the mold (mold does not show deformation as a result of the hardening of the casting), it is possible to reduce thermal cracking and veining.
  • Past issues, such as the yield rate of recycled sand and mold strength can be drastically improved.
  • We also offer products with a range of features, such as improved curing speed, longer pot life, easier mold release after pouring, and reduced odor.
  • In place of organic esters, we also offer gas-cured alkaline phenol resin that can be cured instantly with carbon dioxide.
  • We are working proactively to reduce our green house gas emissions, which contribute to global warming. 100% of the power used to manufacture our alkaline phenol resins is renewable energy.


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