发明授权
US4852629A Cold-box process for forming foundry shapes which utilizes certain carboxylic acids as bench life extenders 失效
用于形成铸造形状的冷箱方法,其利用某些羧酸作为生命延长剂

Cold-box process for forming foundry shapes which utilizes certain
carboxylic acids as bench life extenders
摘要:
Certain carboxylic acids are used in polyurethane-forming binder compositions to extend the bench life of such compositions. The binder compositions are particularly useful for preparing sand castings used for making foundry parts.
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