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16 条记录 (耗时 0.082 秒)

    Processes and compositions to enhance the tensile strength of reclaimed sand bonded with alkaline resins
    2.
    发明授权
    Processes and compositions to enhance the tensile strength of reclaimed sand bonded with alkaline resins 失效
    提高与碱性树脂粘结的再生砂的拉伸强度的方法和组合物

    公开(公告)号：US5089540A

    公开(公告)日：1992-02-18

    申请号：US596546

    申请日：1990-10-12

    申请人： David R. Armbruster ,  S. Raja Iyer ,  Merlyn C. Pasion

    发明人： David R. Armbruster ,  S. Raja Iyer ,  Merlyn C. Pasion

    IPC分类号： B22C1/02 ,  B22C1/22 ,  C08G8/28 ,  C08G16/02

    CPC分类号： C08G8/28 ,  B22C1/02 ,  B22C1/22 ,  C08G16/0218

    摘要： The present invention provides methods for treating reclaimed sand obtained from dismantled foundry molds and cores which contain residue from a cured binder of an ester-cured alkaline phenolic resin. Treatment of the reclaimed sand with a silane solution containing one or more amines, particularly an aqueous solution containing a silane and one or more amines, enhances the tensile strengths of foundry molds and cores produced therefrom relative to those obtained with untreated reclaimed sand. Methods for producing foundry cores and molds which incorporate such a treatment process are also provided by this invention, as are raw batch formulations.

    摘要翻译： 本发明提供了从拆除的铸造模具和芯中得到的再生砂的处理方法，其中含有由固化的碱性酚醛树脂的固化的粘合剂的残留物。 用含有一种或多种胺，特别是含有硅烷和一种或多种胺的水溶液的硅烷溶液处理再生砂，相对于用未经处理的再生砂获得的那些，可提高铸造模具和由其生产的芯的抗拉强度。 本发明还提供了包含这种处理方法的铸造芯和模具的生产方法，以及生批料配方。

    Phenol-formaldehyde-furfuryl alcohol resins
    6.
    发明授权
    Phenol-formaldehyde-furfuryl alcohol resins 失效
    苯酚 - 甲醛 - 糠醇树脂

    公开(公告)号：US4722991A

    公开(公告)日：1988-02-02

    申请号：US866439

    申请日：1986-05-23

    申请人： David R. Armbruster

    发明人： David R. Armbruster

    IPC分类号： C08G16/02 ,  C08G8/04 ,  C08G8/06 ,  C08G8/30

    CPC分类号： C08G16/0256

    摘要： A terpolymer is prepared from phenol, furfuryl alcohol and formaldehyde wherein a substantial amound of the furfuryl alcohol is catalytically reacted by means of a water soluble multivalent metal salt catalyst, and wherein the reaction is carried out under essentially hydrous conditions.

    摘要翻译： 由酚，糠醇和甲醛制备三元共聚物，其中通过水溶性多价金属盐催化剂催化反应大量的糠醇，并且其中反应在基本上含水条件下进行。

    Dialdehyde modified phenolic foundry sand core binder resins, processes for making same, and process for preparing foundry cores and molds employing same
    7.
    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。

    Ambient temperature hardening binder compositions
    8.
    发明授权
    Ambient temperature hardening binder compositions 失效
    环境温度硬化粘合剂组合物

    公开(公告)号：US5281644A

    公开(公告)日：1994-01-25

    申请号：US971396

    申请日：1992-11-04

    申请人： S. Raja Iyer ,  David R. Armbruster ,  Arthur H. Gerber

    发明人： S. Raja Iyer ,  David R. Armbruster ,  Arthur H. Gerber

    IPC分类号： C08G8/28 ,  C08K5/16 ,  C08K5/32 ,  C08L61/04 ,  C08L61/10

    CPC分类号： C08K5/32

    摘要： There are disclosed methods and compositions for retarding the ambient temperature hardening of a phenolic resole resin alone or with an aggregate when such resin is contacted with a nitroalkane and a hardening agent such as lightburned magnesium oxide, an organic ester functional hardening agent, and mixtures of lightburned magnesium oxide and an organic ester functional hardening agent in an alkaline medium. There is also disclosed a hardener composition for phenolic resole resins wherein the hardener composition consists essentially of a solution of a nitroalkane in an organic ester functional hardening agent.

    摘要翻译： 公开的方法和组合物用于当这种树脂与硝基烷烃和硬化剂如轻烧的氧化镁，有机酯官能化硬化剂和有机酯官能化硬化剂接触时，单独或与聚集体一起延迟酚醛树脂树脂的环境温度硬化， 在碱性介质中轻烧镁氧化物和有机酯官能化硬化剂。 还公开了一种用于酚醛树脂树脂的固化剂组合物，其中该固化剂组合物基本上由硝基烷烃在有机酯官能化硬化剂中的溶液组成。