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    Dialdehyde modified phenolic foundry sand core binder resins, processes for making same, and process for preparing foundry cores and molds employing same
    1.
    发明授权
    Dialdehyde modified phenolic foundry sand core binder resins, processes for making same, and process for preparing foundry cores and molds employing same 失效
    二醛改性酚醛铸造砂芯粘结剂树脂，其制备方法，以及使用其制备铸造芯和模具的方法

    公开(公告)号：US5354788A

    公开(公告)日：1994-10-11

    申请号：US118698

    申请日：1993-09-10

    申请人： Calvin K. Johnson ,  David R. Armbruster ,  Sudhir K. Trikha

    发明人： Calvin K. Johnson ,  David R. Armbruster ,  Sudhir K. Trikha

    IPC分类号： B22C1/22 ,  C08G8/00 ,  C08G8/04 ,  C08G8/10

    CPC分类号： B22C1/2253

    摘要： A phenolic resole resin for use as a foundry binder which has been internally modified to reduce its hot strength and thereby enhance its shakeout property is disclosed. The resin is the reaction product of a phenolic compound; a dialdehyde; and formaldehyde. A process of preparing such resin is also disclosed, comprising first reacting the phenolic compound and the dialdehyde, and subsequently reacting the product with the formaldehyde. The resin may be, in a preferred embodiment, an ester-curable alkaline phenolic resin. Also disclosed are a raw batch formulation including the resin of the invention, and foundry articles prepared therefrom.

    摘要翻译： 公开了一种用作铸造粘合剂的酚醛树脂树脂，其已被内部改性以降低其热强度并由此提高其振荡性能。 树脂是酚类化合物的反应产物; 二醛 和甲醛。 还公开了制备这种树脂的方法，包括首先使酚类化合物和二醛反应，然后使产物与甲醛反应。 在优选的实施方案中，树脂可以是酯可固化的碱性酚醛树脂。 还公开了包含本发明的树脂的原料分批制剂和由其制备的铸造制品。

    Ester hardeners for phenolic resin binder systems
    3.
    发明授权
    Ester hardeners for phenolic resin binder systems 失效
    酚醛树脂粘合剂系统的酯类固化剂

    公开(公告)号：US5036116A

    公开(公告)日：1991-07-30

    申请号：US609669

    申请日：1990-10-18

    申请人： S. Raja Iyer ,  Sudhir K. Trikha

    发明人： S. Raja Iyer ,  Sudhir K. Trikha

    IPC分类号： B22C1/22 ,  C08J3/09 ,  C08K5/04

    CPC分类号： C08J3/095 ,  B22C1/2253 ,  C08K5/04 ,  C08J2361/06

    摘要： A hardener composition for alkaline phenolic resole resin binders which comprises a solution of a benzylic ether resole resin in an ester. Binder compositions comprising this hardener with alkaline phenolic resole resins are further provided as are foundry molding compositions and methods for making foundry cores and molds using the molding compositions.

    摘要翻译： 一种用于碱性酚醛树脂树脂粘合剂的固化剂组合物，其包含苯甲醚甲阶酚醛树脂在酯中的溶液。 进一步提供包含该固化剂的碱性酚醛树脂树脂的粘合剂组合物，如铸造模塑组合物和使用该模塑组合物制造铸造芯和模具的方法。