Binder compositions comprising furfuryl ester and furfuryl ester- furuyl alcohol combinations

摘要

Acid-curable furfuryl alcohol prepolymer binders have improved properties when admixed with a dibasic acid di-ester of the composition ##EQU1## when n is from 1 to 8, R.sup.1 is furfuryl, and R.sup.2 is furfuryl or methyl. The diesters are preferably added in the amount of 5- 35% by weight of total composition. These compositions are particularly useful in the preparation of sand cores and molds for foundry use which have improved strength and hardness. These furfuryl esters are also acid- curable and can be used alone as resin binders.