发明名称 |
ALKALINE BENZYLIC ETHER PHENOLIC RESIN BINDERS |
摘要 |
Modified benzylic ether resole resins and process for their preparation. The resins are prepared by treating a phenol with a molar excess of aldehyde in the presence of a divalent metal ion catalyst at a pH below 7 followed by further reaction at a pH above 8 in the presence of an alkaline catalyst. Alkaline solutions of the resins are used as foundry binders in an ester cure process. |
申请公布号 |
ZA9000745(B) |
申请公布日期 |
1990.11.28 |
申请号 |
ZA19900000745 |
申请日期 |
1990.01.31 |
申请人 |
ACME RESIN CORPORATION |
发明人 |
DAVID RAY ARMBRUSTER;MERLYN CANDAME PASION |
分类号 |
B22C1/20;B22C1/22;B22C9/12;C08G8/00;C08G8/04;C08G8/28;C08G8/36;C08K5/13;C08L61/04;C08L61/06;C09J161/06 |
主分类号 |
B22C1/20 |
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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