发明名称 |
Dialdehyde modified phenolic foundry sand core binder resins, processes for making same, and process for preparing foundry cores and molds employing same |
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.
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申请公布号 |
US5354788(A) |
申请公布日期 |
1994.10.11 |
申请号 |
US19930118698 |
申请日期 |
1993.09.10 |
申请人 |
BORDEN, INC. |
发明人 |
JOHNSON, CALVIN K.;ARMBRUSTER, DAVID R.;TRIKHA, SUDHIR K. |
分类号 |
B22C1/22;C08G8/00;C08G8/04;C08G8/10;(IPC1-7):B22C1/22 |
主分类号 |
B22C1/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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