| 摘要 |
This invention relates to foundry mixes and their use in preparing foundry shapes (molds and cores) and in casting metals. The foundry mixes comprise a foundry aggregate and an organic foundry binder that contains an organic polyisocyanate and an aliphatic mercaptan. The binder systems react to form thiocarbamate polymers when mixed with sand. Preferably, a tertiary amine curing catalyst is used to promote the reaction of the organic polyisocyanate and aliphatic mercaptan. |
