Patent ID: 9518143
Filing Date: 2016-12-13
CPC Classification: B22C,C08G

Claim Text:
1. A binder composition for a foundry mix, comprising: a polyurethane binder precursor, provided in two parts, the first part comprising a polyol component and the second part comprising a polyisocyanate component; and a liquid curing catalyst that is 2-ethanolpyridine, the liquid curing catalyst being present in the range of about 5 to 7 weight percent based on the weight of the first part of the polyurethane binder component, selected to provide a work time in the range of about 45 minutes to about 60 minutes after being mixed with the polyurethane binder precursors and an appropriate foundry aggregate and a strip time that is less than 167% of the work time, as measured from the same starting point.