Phenolic resin binders for foundry and refractory uses
    4.
    发明授权
    Phenolic resin binders for foundry and refractory uses 失效
    用于铸造和耐火用途的酚醛树脂粘合剂

    公开(公告)号:US4740535A

    公开(公告)日:1988-04-26

    申请号:US22933

    申请日:1987-03-06

    摘要: A process for preparing modified phenolic resole resins providing improved binders for refractories and foundry cores and molds. The resins are prepared by treating a phenol with a molar excess of aldehyde in the presence of an alkaline catalyst followed by further reaction at a pH below 7 in the presence of a catalyst which promotes formation of ortho-ortho benzylic ether bridges between the phenolic nuclei.

    摘要翻译: 制备改性酚醛树脂树脂的方法,提供改进的耐火材料和铸造芯和模具的粘合剂。 树脂通过在碱性催化剂的存在下用摩尔过量的醛处理苯酚,然后在催化剂的存在下在pH低于7的情况下进一步反应来制备,所述催化剂促进酚核之间的邻位苄基醚桥的形成 。

    Cold-setting compositions for foundry sand cores and molds
    5.
    发明授权
    Cold-setting compositions for foundry sand cores and molds 失效
    铸造砂芯和模具的冷定型组合物

    公开(公告)号:US4644022A

    公开(公告)日:1987-02-17

    申请号:US802280

    申请日:1985-11-27

    申请人: Raja Iyer

    发明人: Raja Iyer

    CPC分类号: B22C1/2233 C08L61/00

    摘要: A cold-setting foundry binder composition, which provides foundry cores and molds with improved curing speed, comprising a particulate refractory material, a resin binder, an acid curing catalyst, and an accelerator. The accelerator is selected from the group: dihydroxybenzenes, derivatives of dihydroxybenzenes, trihydroxybenzenes, and their mixtures.

    摘要翻译: 一种冷成型铸造粘合剂组合物,其提供具有改进的固化速度的铸造芯和模具,其包含颗粒状耐火材料,树脂粘合剂,酸固化催化剂和促进剂。 促进剂选自二羟基苯,二羟基苯衍生物,三羟基苯及其混合物。

    Ambient temperature curing, high carbon contributing compositions
    6.
    发明授权
    Ambient temperature curing, high carbon contributing compositions 失效
    环境温度固化,高碳贡献组成

    公开(公告)号:US5043412A

    公开(公告)日:1991-08-27

    申请号:US403048

    申请日:1989-09-01

    IPC分类号: B22C1/22 C08L61/06

    CPC分类号: B22C1/2253 C08L61/06

    摘要: A raw batch composition for use in making a shaped article such as a foundry shape or refractory article is disclosed. The composition comprises a mixture of an aggregate material; a phenol formaldehyde novolak resin; a phenol formaldehyde resole resin; and an ester functional curing agent. A shaped article prepared from the composition and processes for making a refractory body or foundry article are also disclosed.

    摘要翻译: 公开了一种用于制造诸如铸造形状或耐火物品的成型制品的生料批料组合物。 组合物包含聚集体材料的混合物; 苯酚甲醛酚醛清漆树脂; 苯酚甲醛树脂; 和酯官能化固化剂。 还公开了由组合物制备的成型制品以及用于制备耐火体或铸造制品的方法。

    Resin binders for foundry sand cores and molds
    7.
    发明授权
    Resin binders for foundry sand cores and molds 失效
    铸造砂芯和模具的树脂粘合剂

    公开(公告)号:US4336179A

    公开(公告)日:1982-06-22

    申请号:US245294

    申请日:1981-03-19

    申请人: Raja Iyer

    发明人: Raja Iyer

    IPC分类号: B22C1/22 C08G8/10 C08L61/06

    CPC分类号: C08L61/06 B22C1/2253 C08G8/10

    摘要: A granular composition is provided that is especially useful for the preparation of foundry cores and molds. Incorporated in the composition is a novel resin binder that imparts rapid curing properties to the composition.

    摘要翻译: 提供了一种特别可用于制备铸造芯和模具的颗粒组合物。 组合物中含有一种赋予组合物快速固化性能的新型树脂粘合剂。