Patent ID: 9200140
Filing Date: 2015-12-01
Classification: B22C,C08K

Abstract:
1. A binder composition for mold formation, comprising: one or more 5-position substituted furfural compounds selected from the group consisting of 5-hydroxymethylfurfural and 5-acetoxymethylfurfural; and a furfurylated urea resin; wherein: the one or more 5-position substituted furfural compounds are dissolved in the furfurylated urea resin and the content of the furfurylated urea resin is from 1 to 20% by weight, the furfurylated urea resin is a condensed product made from furfuryl alcohol, urea and formaldehyde, in the furfurylated urea resin respective ratios by mole of formaldehyde and urea to each mole of furfuryl alcohol are from 0.5 to 8 moles of formaldehyde and 0.2 to 4 moles of urea to each mole of furfuryl alcohol, and wherein the content of the furfuryl alcohol is from 60% by weight or more and 95% by weight or less.