| 摘要 |
The present invention provides a novel phenolic urethane binder composition having a drying oil copolymer in the polyisocyanate resin component. The drying oil copolymers include linseed oil copolymers. The phenolic urethane binders of the present invention are useful in making foundry cores and molds. These foundry binders provide decreased gel formation and improved stability. Foundry mixes prepared using these phenolic urethane binders exhibit improved bench life properties.
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