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公开(公告)号：US20180065170A1
公开(公告)日：2018-03-08
申请号：US15812364
申请日：2017-11-14
申请人： ASK Chemicals LLC
发明人： Xianping WANG , Mark STANCLIFFE , Christian PRIEBE , Joerg KROKER
CPC分类号： B22C1/2273 , B22C1/22 , B22C3/00 , B22C9/02 , C01B7/191 , C08F290/147 , C08G18/006 , C08G18/0847 , C08G18/289 , C08G18/542 , C08G18/7671 , C08L75/04 , C08L83/02 , C09J175/04 , C08K5/5415
摘要： An organic binder system is mixed with molding material for sand casting in the metals industry. The organic binder system has three parts, the first two of which are conventional and are used in the cold box or no bake process. The third part, which is combined with the first two parts at the time of use, contains at least an alkyl silicate and, optionally, a bipodal aminosilane. In some embodiments, an amount of hydrofluoric acid is included in one or both of the first two parts. Use of the organic binder system provides improved tensile strength in the mold, especially in high relative humidity.
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公开(公告)号：US20180065171A1
公开(公告)日：2018-03-08
申请号：US15812402
申请日：2017-11-14
申请人： ASK Chemicals LLC
发明人： Xianping WANG , Mark STANCLIFFE , Christian PRIEBE , Joerg KROKER
摘要： A binder system for refractory materials used in sand casting processes, especially two-part polyurethane-based binder systems used in the cold box or no bake process, has less metal-mold reaction when a separate third part is used. The third part is an alkyl silicate, such as tetraethyl orthosilicate (“TEOS”), an alkyl orthoformate, such as trimethyl orthoformate (TMOF) or triethyl orthoformate (TEOF), or combinations thereof.
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