发明名称 |
Phenolic resin compositions. |
摘要 |
<p>A phenolic resin composition comprises an ester-curable phenol-aldehyde resin in alkaline aqueous solution wherein the phenol-aldehyde resin is a methylolated phenolic novolak resin. Preferably, during manufacture of the methylolated phenolic novolak resin, unreacted phenol is removed. The composition may be employed, for reaction with an organic ester hardener, as a binder in the production of foundry moulds and cores having high strength. The further incorporation of an aryloxy alcohol in the novolak resin binder additionally improves the final strength of products obtained by a gas curing technique using ester vapour, such as that of methyl formate.</p> |
申请公布号 |
EP0388145(A1) |
申请公布日期 |
1990.09.19 |
申请号 |
EP19900302658 |
申请日期 |
1990.03.13 |
申请人 |
BORDEN (UK) LIMITED |
发明人 |
LEMON, PETER HERBERT RICHARD BRYAN;IRELAND, JOHN;BAKER, DEREK WILLIAM |
分类号 |
B22C1/22;C08G8/10;C08G8/20;C08G8/32;C08G8/36;C08K5/101;C08L61/04;C08L61/10 |
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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